COMPARISON OF SBR AND CONTINUOUS FLOW ACTIVATED SLUDGE FOR NUTRIENT REMOVAL

Size: px
Start display at page:

Download "COMPARISON OF SBR AND CONTINUOUS FLOW ACTIVATED SLUDGE FOR NUTRIENT REMOVAL"

Transcription

1 COMPARISON OF SBR AND CONTINUOUS FLOW ACTIVATED SLUDGE FOR NUTRIENT REMOVAL Alvin C. Firmin CDM Jefferson Mill, 670 North Commercial Street Suite 201 Manchester, New Hampshire ABSTRACT Sequencing batch reactors (SBR) are a flexible configuration of the activated sludge process, capable of providing low effluent nutrient levels. The SBR is fundamentally the same as any other variation of the activated sludge process, except that it operates in a batch draw and fill mode. The nuances of a batch operation must be understood and applied. This paper presents design considerations unique to the SBR and a design comparison of a continuous flow system and SBR, demonstrating that the total volume in a SBR system is not less than a comparably sized continuous flow system and that the total number of diffusers and installed blower horsepower is greater for the SBR system. KEYWORDS Sequencing batch reactor, SBR, activated sludge, aeration INTRODUCTION Sequencing batch reactors (SBR) have become a popular means of providing activated sludge treatment. With proper design and configuration, SBRs will provide very low effluent nutrient levels. The SBR is fundamentally the same as any other variation of activated sludge the same concepts, design procedures, and biological kinetics are applicable. However, the batch operation of the process and impacts on design aspects must be understood and correctly applied to achieve optimum results. In particular, the batch operation has a significant impact on sizing of the aeration system. This paper presents a sizing comparison between conventional flow activated sludge and a SBR system with varying numbers of reactors, demonstrating the impact of the number of reactors on the sizing of the aeration system. The paper also discusses the impacts of alkalinity control, decanting, the necessity of scum removal and advantages of the SBR compared to continuous flow systems. SEQUENCING BATCH REACTOR DESCRIPTION AND DESIGN SBRs are not a recent innovation. Activated sludge was developed as a batch process in the early 1900s. The first full-scale activated sludge plants were variable volume, batch operated systems (Wilderer, et al.) (EPA, 1999). All of these fill-draw plants were converted to continuous flow operations by the mid-1920s, even though fill-draw operation was known to produce a higher quality effluent (Wilderer, et al.) Reasons for the conversion were: 1. Due to lack of instrumentation and automatic controls, all operational changes were manual. 2. The coarse bubble diffusers used for mixing and aeration were subject to clogging during the settling phase, requiring manual cleaning. 3. Discharge rates from the fill-draw operations were greater than influent rates. Convenience and cost were given preference over treatment performance and continuous flow operation became the standard practice (Wilderer, et al.). In essence, the batch systems were not operable when applied to a full-scale application of any significant size. It is interesting to note that sludge bulking common to almost all activated sludge applications prior to the recent use of selector technologies was not noticed until the advent of continuous flow systems.

2 Fill-draw systems re-emerged in the Netherlands in the 1960s, with limited success, and in Australia in the 1970s. With the development of computer logic controlled instrumentation and increased aeration efficiency, fill and draw systems became a viable activated sludge alternative. Batch or fill and draw systems provided in multiple units are now termed sequencing batch reactors. Current SBR technology produces effluent quality equal or superior to conventional continuous flow systems. Any wastewater that can be treated by continuous flow activated sludge can be treated to similar levels by properly designed and operated SBRs. Aeration and clarification are done in single tank operating on time controlled cycles. During the first phase of the cycle the unit functions as a suspended growth tank in aerobic, anoxic and/or anaerobic modes. During the final phase it functions as a clarifier. Return activated sludge for mixed liquor control and internal recycle for nitrogen removal are not required since solids never leave the tank. SBRs are very amenable to restricted sites due to flexible layouts and tank geometry and with flow splitting controlled by time there is no requirement for equal hydraulic split of flows. There are three major differences between SBRs and continuous flow designs and these differences must be accounted for in design of a SBR. 1. The fraction of each cycle that is not used for biological reactions must be accounted for. In nitrifying designs, the system SRT must be based on the percentage of the cycle time that is under active aeration. Carbonaceous designs should have the SRT based on the portion of the cycle time that is not devoted to settling or decanting. The selection of the SRT is based on the same design guidelines and principles as for continuous flow systems. Total mixed liquor provided in a SBR system is determined by dividing the total mixed liquor required for a given SRT by the percentage of the cycle time applicable to determination of the SRT (the aerated portion of the cycle in nitrifying systems). 2. Oxygen requirements must be distributed to each reactor based on the total effective aeration time. This time may be more or less than 24 hours per day depending upon the specific design. Blowers and diffusers must be sized accordingly. 3. Clarifier designs should be based on providing sufficient time during the settling and decant phases to ensure that the settled mixed liquor interface is below the minimum decant level. Each batch fill and discharge of a SBR is a cycle. Multiple cycles per day per reactor are used when treating municipal wastes. Each cycle consists of four distinct phases: fill, react, settle, and discharge or decant. The fill phase can consist of static, mix, and react periods. The static-fill period consists of filling an unmixed reactor, mix-fill consists of filling an unaerated, mixed reactor resulting in anoxic or anaerobic conditions within the mixed liquor (depending upon whether nitrification has occurred during the prior cycle), and react-fill consists of aeration during the fill period. Most SBR designs include mix-fill followed by react-fill components of the fill phase of the cycle. During the react phase, the mixed liquor is aerated for carbonaceous and nitrogenous oxidation. Additional anoxic time can also be included during the reaction phase to meet lower total nitrogen effluent limits. During the settling phase, mixers and aerators are turned off resulting in quiescent clarification with no impacts from density currents. Following settling, the upper clarified portion of the SBR contents are decanted and discharged. Since this decant period is usually less than the fill period, the rate of the discharge flow is greater than the rate of the influent wastewater flow. This requires downstream flow equalization, or the design of subsequent treatment processes, such as filtration and disinfection, to accommodate higher and intermittent flow rates. Excess activated sludge can be wasted during any portion of the cycle, but common practice is to waste from the decant cycle in order to optimize solids handling. The volume remaining in the SBR, referred to as the low water level, contains the settled mixed liquor which is available to treat the next cycle. SBRs can be configured and operated to achieve varying degrees of BOD, nitrogen, and phosphorus removal. Provided with sufficient volume and adequate aerated SRT, varying degrees of nitrogen

3 reduction and removal are accomplished with simple control of the anoxic periods within each cycle. Phosphorus can be removed with chemical precipitation during each cycle or biologically with an anaerobic period at the start of each cycle. However, it can be difficult to obtain true anaerobic periods in SBR nitrifying systems. SBRs do offer significant advantages to other modes of activated sludge. Because of the batch, fill and draw operation, the reactor is perfect plug flow. Since hydraulic retention time is time based, there is no short circuiting. The clarification component has no density currents, and also no short circuiting. Internal recycle for nitrogen removal and return activated sludge are not required. The process is extremely flexible. Instead of concrete walls setting fixed volumes for the cycle components, the cycle component times can be varied with the system instrumentation to meet varying treatment requirements. Disadvantages include dealing with a constantly variable water surface, process effluent flow rate usually significantly exceeds the influent flow rate, and aeration systems must be sized on the maximum gas rate to each SBR. Aeration systems must also account for the variable water surface; transfer efficiency should be based on average water depth and blower horsepower based on high water level. As discussed below, SBRs are at a disadvantage compared to continuous flow in biological phosphorus removal. The total installed SBR reactor volume will be similar to that of the aerations tanks plus clarifiers in continuous flow system and costs, capital and operating, can be expected to be similar for given effluent requirements and operating SRT. Nitrogen removal Biological nitrogen removal in a SBR is accomplished in the same manner as in continuous flow reactors, using one or more anoxic zones. Process flexibility is superior in the SBR since the placement and duration of the anoxic zones with a given cycle is time based. The relationship between the low water volume to the fill volume in a SBR is analogous to the internal recycle rates in the Modified Ludzack- Ettinger (MLE) continuous flow process. If all of the nitrate (nitrate herein refers to NO x ) in the low water volume is removed using influent wastewater carbon, that volume serves as dilution to nitrate produced during the remainder of the cycle. The dilution provided by the SBR low water volume has the same relationship as the dilution provided by denitrifying the internal and return sludge streams in MLE. The maximum percent nitrate removal in a front end anoxic zone is equal to the following: % nitrate removed = low water volume / (low water volume + cycle fill volume) (1) Increased nitrate removal, to levels somewhat greater than practical with MLE, can be achieved by providing increased low water volume with respect to the fill volume. Additional anoxic zones can be provided within a cycle (prior to settling) to minimize effluent nitrates. This will require a greater external carbon dose than that in a two-stage continuous flow system since the entire reactor volume would have to be denitrified, whereas in a continuous flow system the internal recycle is taken off prior to the latter anoxic zones. Phosphorus removal With chemical precipitation, phosphorus can be removed to levels comparable to continuous flow processes. In non-nitrifying systems, enhanced biological phosphorus removal (EBPR) should also produce comparable removal levels to continuous flow. However, in conjunction with nitrifying (including nitrogen removal) EBPR is problematic in a SBR. Unless a high degree of denitrification is provided at the end of the react cycle, which would require an external carbon source, anaerobic conditions at onset of the next cycle will be inhibited by the presence nitrates. Each cycle could also start with an anoxic component followed by anaerobic, but removal of readily available carbon anoxically might not be conducive to high levels of EBPR.

4 EBPR can be designed for in conjunction with nitrogen removal, but chemical feed facilities adequate for complete phosphorus removal should be provided. SIZING COMPARISONS TO CONTINUOUS FLOW A sizing comparison using identical design criteria was prepared for a continuous flow and SBR activated sludge systems to demonstrate respective volume requirements and aeration system sizing. The SBR was sized for three different systems, with two, three, and four reactors each, to demonstrate the impact of the number of reactors on aeration requirements. Design flows and loads for the sizing comparison are presented in Table 1. Design criteria for the activated sludge system are presented in Table 2. Table 1. Design Flows and Loads Flow (mgd) BOD (lbs/day) TKN (lbs/day) Average 2.6 4, Max month 6, Max day 6.0 8,800 1,000 Peak hour 7.5 Table 2. Activated Sludge Design Criteria Effluent BOD & TSS Effluent TN Minimum month wastewater temp Aerated SRT Net yield Aerobic biomass 10 mg/l 4.7 mg/l 11 0 C 10 days 0.85 lbs/lb BOD removed 54,300 lbs Each system has an aerated SRT of 10 days. Since loadings and net yields are identical, the required aerated biomass is identical for each system. The SBR systems were sized based on 5 cycles per reactor per day, with a cycle time of 4.8 hours per reactor. Cycle time components used for the comparison are presented in Table 3. From Table 3, the anoxic time in each cycle is the mix fill time or 36 minutes. Total aeration time is the sum of the react-fill and react cycle times or 135 minutes. Each cycle is 46.9% aerated. The reactor sizes for two, three, and four SBR systems are presented in Table 4. For the purposes of this comparison, each system was sized to maintain the same total volume and cycle time components. Table 5 presents a summary comparison of a continuous flow system and the SBR systems. Total activated sludge volumes and achievable effluent TN using carbon in the influent wastewater are shown.

5 Table 3. SBR Cycle Times (minutes) 4 SBR 3 SBR 2 SBR Mix fill React fill Total fill time React Total aeration time Settle Decant Total cycle time Table 4. SBR Sizes 4 SBR 3 SBR 2 SBR Area per tank-sf 6,400 8,540 11,450 Dimensions-ft 80 x x x 107 Low water depth-ft Fill depth-ft High water depth-ft Table 5. System Sizing Comparison Continuous Flow 4 SBR 3 SBR 2 SBR MLSS 4000 mg/l 4500 mg/l mg/l mg/l 1 % cycle aerated Total Volume 3.4 mil gal mil gal 4.3 mil gal 4.3 mil gal IR (or equivalent) MLE TN low water level 2. Includes 2 stage anoxic/aerobic tanks plus clarifiers. Aeration tanks are 16 ft deep 3. Needs second stage anoxic/aerobic after MLE to meet effluent TN The total volume of the continuous flow system, including aeration, pre and post anoxic zones, and clarifiers, is about 80 percent of the SBR volume. This percentage will vary for specific applications and design criteria, but does demonstrate that the volume of a SBR system is not significantly less than that of a continuous flow system as frequently claimed by SBR vendors. In the case examined, the continuous flow system is not capable of meeting the stated effluent TN limit of 4.7 mg/l with an MLE system. The internal recycle rate for the MLE system was taken to be 4 times the influent flow under average conditions. Second stage anoxic and aerobic zones would be required to

6 meet the stated TN limit of 4.7 mg/l. External carbon would be required for the second anoxic zone. Tank volume for the second zones are included in the total volume presented in Table 5. The analogous equivalent internal recycle rate for the SBRs, based on the ratio of the low water level to the average fill level is 5.9. As indicated in Table 5, the SBR systems as configured would be able to meet the TN limits without using a second anoxic zone towards the end of the react cycle. External carbon addition would not be required for the SBRs. Oxygen transfer requirements and air supply for each system is presented in Table 6. The oxygen transfer required is identical for the continuous flow system and the SBR systems. However, the air supply requirements are greater for the SBR than for the continuous flow system. The air supply rates presented in Table 6 are per SBR reactor. The total air flow required, to be compared to that for the continuous flow system, is the rate shown in Table 6 times the number of SBRs. Table 6. Air Supply Requirements Continuous Flow 4 SBR 3 SBR 2 SBR Oxygen Transfer Req'd Average lbs/day 5,905 5,905 5,905 5,905 Max day lbs/day 10,360 10,360 10,360 10,360 Aeration hrs/day Per SBR Total Av O 2 Transfer Rate lbs/hr lbs/day Air Supply-scfm Average Max day Bold = Per SBR The air supply rate for a SBR has to consider the actual number of hours of aeration per day and the maximum rate has to be supplied to each SBR. The air supply is set by determining the gas rate. The gas rate, in lbs per hour, is equal to: oxygen demand lb / d Gas rateinlbs per hr = (2) hours of aeration per day The gas rate times 24 hrs per day yields the equivalent daily oxygen transfer rate used for determining air requirements and the number of diffusers. The maximum gas rate must be handled by each SBR. The resulting number of diffusers for the continuous flow system and for each SBR system are presented in Figure 1. The number of diffusers is based on nine inch membrane discs loaded at an average air flow rate of 1.1 scfm per diffuser. The number of diffusers required for the SBR is almost double that required for the continuous flow system.

7 Figure 1. Total Number of 9 Inch Disk Diffusers Number of diffusers Continuous Flow 4 SBR 3 SBR 2 SBR Air supply and diffuser requirements were independently determined for each system. For comparative purposes, the number of diffusers for continuous flow and SBR systems can be estimated using the requirement for one or the other. The ratio of diffusers in a SBR and continuous flow system is given by: SBR diffusers 100 transfer efficiency continuous = x (3) Continuous flow diffusers % SBR cycle aerated transfer efficiencysbr With the same diffusers, the transfer efficiency is proportional to the diffuser submergence and SBR diffusers Continuous flow diffusers 100 diffuser depth continuous x % SBR cycle aerated diffuser depth SBR = (4) In the example case, the continuous flow system requires 1,771 diffusers and the diffuser submergence is feet (16 feet deep aeration tanks and diffusers nine inches off the floor). The SBR systems with three and four reactors have an average water depth of feet. Diffuser submergence is feet. From Table 2, the SBR is aerated for 46.9% of the cycle. The total number of diffusers in the three and four SBR reactor system can be determined directly from the continuous flow system diffuser requirements as follows: SBR diffuser ratio = x = (5) Number of SBR diffusers = 1771 x1.799= 3175 (6) These diffusers would be divided equally among each of the SBR reactors. If the reactors in a system were not sized identically, then the diffusers would be split in the ratio of the reactor volumes.

8 The installed blower horsepower for each system is presented in Figure 2. One redundant blower is included in the installed horsepower. Installed horsepower for a SBR system decreases with the number of reactors provided. For a two reactor system, the installed horsepower is more than twice that of a continuous flow system. With a four reactor system the installed horsepower approaches that of the continuous flow system. Power consumption is the same for the continuous flow and each of the SBR examples, averaging about 2000 khw/day. Figure 2 Installed Blower Horsepower Installed HP Continuous Flow 4 SBR 3 SBR 2 SBR OTHER CONSIDERATIONS Decanting Each SBR manufacturer offers specific decant types. Unless the supplier is pre-selected, designs must be flexible enough to allow the various decanting methods of each vendor. It is preferable to provide a decant with a free discharge above the downstream surface, which results in a constant decant rate. Submerged discharges result in decant rates varying throughout the decanting cycle. Use of a free discharge also eliminates air binding issues and the decant discharge pipes do not require venting. A good decant design is to direct the decanter flow to an atmospheric discharge in a small box located within or adjacent to the SBR. This box in turn discharges to atmosphere, typically an equalization basin. Alkalinity control In nitrifying systems, the alkalinity should be maintained at a minimum of 50 to 60 mg/l. Due to the batch nature of SBRs the alkalinity can, and will likely, vary within each reactor. Alkalinity should be checked at the end of each cycle. The measured alkalinity is specific to the reactor sampled. If insufficient alkalinity is present, alkalinity correction via chemical feed is necessary. The alkalinity addition should be based on the correction required and the reactor low water level volume. This can be critical given the high ratio of the low water volume to feed volume to the reactor (typically 5:1 or greater). Chemical feed for the alkalinity correction must be directed to the specific SBR that needs adjustment and it should be done prior to the start of the next fill cycle for the reactor in question. Addition to the influent stream will never

9 correct the deficiency in the reactor in question since the influent flow immediately following cycle termination of a given reactor is directed to other reactors. Appropriate instrumentation is required to automatically direct the chemical addition to the proper reactor. Scum removal A common compliant with SBR systems is problems with scum removal. However, this problem is not inherent to the SBR, the problem occurs because the design engineer failed to recognize a trapped free surface. Provisions to remove scum and floatables must be provided in wastewater treatment facilities wherever a trapped free surface occurs. Scum removal in a SBR is more complicated than in a continous flow reactor because of the variable water surface. Scum removal is accomplished using floating devices or with fixed position, rotating scum troughs. Fixed troughs must be positioned at the high water level, and operations must fill to high water level when scum removal is required. SUMMARY AND CONCLUSIONS The SBR is fundamentally the same as any other variation of activated sludge. The same concepts, design procedures, and biological kinetics used for continuous flow systems are applicable to the design and operation of SBRs. However, the impacts of a batch operation compared to continuous flow systems must be understood and applied for a successful SBR system. Other conclusions include: The SRT for carbonaceous removal and nitrification must be based on the aerated portion of the cycle only. Correctly sized SBRs, using only the aerated portion of the cycle as the basis of system SRT, do not have less total volume than comparable continuous flow systems. High levels of nitrogen removal are easily achievable, and with great process flexibility. With proper instrumentation the occurrence of anoxic zones and the time of the zones can be operator varied to suit specific conditions. High levels of nitrogen and phosphorous removal are best accomplished using biological removal of nitrogen and chemical precipitation of phosphorus. Installed diffuser and blower requirements in an SBR are greater than those for comparable continuous flow system. Installed blower HP increases with a decreasing number of reactors in a given SBR system. Power draw for the aeration system is approximately the same for similar conditions and operation. REFERENCES EPA 932-F (Sept 1999) Wastewater Technology Fact Sheet, Sequencing Batch Reactors Wilderer, Irvine, and Goronszy; Sequencing Batch Reactor Technology; Scientific and Technical Report No. 10, IWA Publishing.

ISAM INTEGRATED SURGE ANOXIC MIX

ISAM INTEGRATED SURGE ANOXIC MIX ISAM INTEGRATED SURGE ANOXIC MIX P r o v e n T e c h n o l o g y FLUIDYNE S ISAM IS A TOTAL TREATMENT SYSTEM incorporating BOD, TSS and nitrogen removal along with sludge reduction in an integrated system.

More information

ENHANCING THE PERFORMANCE OF OXIDATION DITCHES. Larry W. Moore, Ph.D., P.E., DEE Professor of Environmental Engineering The University of Memphis

ENHANCING THE PERFORMANCE OF OXIDATION DITCHES. Larry W. Moore, Ph.D., P.E., DEE Professor of Environmental Engineering The University of Memphis ENHANCING THE PERFORMANCE OF OXIDATION DITCHES Larry W. Moore, Ph.D., P.E., DEE Professor of Environmental Engineering The University of Memphis ABSTRACT Oxidation ditches are very popular wastewater treatment

More information

Aqua MSBR MODIFIED SEQUENCING BATCH REACTOR

Aqua MSBR MODIFIED SEQUENCING BATCH REACTOR MODIFIED SEQUENCING BATCH REACTOR MODIFIED SEQUENCING BATCH REACTOR For over three decades, Aqua-Aerobic Systems has led the industry in sequencing batch reactor technology with performance proven and

More information

AquaPASS. Aqua MixAir System. Phase Separator. System Features and Advantages. Anaerobic. Staged Aeration. Pre-Anoxic.

AquaPASS. Aqua MixAir System. Phase Separator. System Features and Advantages. Anaerobic. Staged Aeration. Pre-Anoxic. PHASED ACTIVATED SLUDGE SYSTEM PHASED ACTIVATED SLUDGE SYSTEM Aqua-Aerobic Systems has led the industry in time-managed, biological technology since 1984. In 2004, Aqua-Aerobic applied its expertise in

More information

- 1 - Retrofitting IFAS Systems In Existing Activated Sludge Plants. by Glenn Thesing

- 1 - Retrofitting IFAS Systems In Existing Activated Sludge Plants. by Glenn Thesing - 1 - Retrofitting IFAS Systems In Existing Activated Sludge Plants by Glenn Thesing Through retrofitting IFAS systems, communities can upgrade and expand wastewater treatment without the expense and complication

More information

WASTEWATER TREATMENT SYSTEM

WASTEWATER TREATMENT SYSTEM WASTEWATER TREATMENT SYSTEM PrintStudioOne.com Nelson Environmental Inc. The Nelson Environmental OPTAER system is an efficient pond-based wastewater treatment solution utilized in a broad spectrum of

More information

Activated Sludge Process Control: Nitrification

Activated Sludge Process Control: Nitrification Activated Sludge Process Control: Nitrification 60 th Annual KWWOA Conference, Session 1: April 11, 2017 Dan Miklos, Senior Associate, Midwest Region, Hazen and Sawyer Agenda Overview of the Utopia Plant

More information

NEW BIOLOGICAL PHOSPHORUS REMOVAL CONCEPT SUCCESSFULLY APPLIED IN A T-DITCH PROCESS WASTEWATER TREATMENT PLANT

NEW BIOLOGICAL PHOSPHORUS REMOVAL CONCEPT SUCCESSFULLY APPLIED IN A T-DITCH PROCESS WASTEWATER TREATMENT PLANT NEW BIOLOGICAL PHOSPHORUS REMOVAL CONCEPT SUCCESSFULLY APPLIED IN A T-DITCH PROCESS WASTEWATER TREATMENT PLANT ABSTRACT C. Yang*, L. Zhou**, W. Luo***, and L. Johnson**** *Corstar International Corp. 111

More information

Aeration University Advanced Concepts in Energy Efficiency

Aeration University Advanced Concepts in Energy Efficiency Aeration University Advanced Concepts in Energy Efficiency Wisconsin Wastewater Operators Association 47 th Annual Conference October 23, 2013 Presented by Phil Korth Aeration and Energy Wastewater Treatment

More information

AMMONIA REMOVAL USING MLE PROCESS EXPERIENCES AT BALLARAT NORTH. David Reyne. Central Highlands Water Authority

AMMONIA REMOVAL USING MLE PROCESS EXPERIENCES AT BALLARAT NORTH. David Reyne. Central Highlands Water Authority AMMONIA REMOVAL USING MLE PROCESS EXPERIENCES AT BALLARAT NORTH Paper Presented by : David Reyne Author: David Reyne, Plant Operator Wastewater Treatment, Central Highlands Water Authority 65 th Annual

More information

TWO YEARS OF BIOLOGICAL PHOSPHORUS REMOVAL WITH AN ADVANCED MSBR SYSTEM AT THE SHENZHEN YANTIAN WASTEWATER TREATMENT PLANT

TWO YEARS OF BIOLOGICAL PHOSPHORUS REMOVAL WITH AN ADVANCED MSBR SYSTEM AT THE SHENZHEN YANTIAN WASTEWATER TREATMENT PLANT TWO YEARS OF BIOLOGICAL PHOSPHORUS REMOVAL WITH AN ADVANCED MSBR SYSTEM AT THE SHENZHEN YANTIAN WASTEWATER TREATMENT PLANT Chester Yang, Ph.D., Gaowei Gu, Baowei Li, Hongyuan Li, Wanshen Lu, Lloyd Johnson,

More information

Nutrient Removal Processes MARK GEHRING TECHNICAL SALES MGR., BIOLOGICAL TREATMENT

Nutrient Removal Processes MARK GEHRING TECHNICAL SALES MGR., BIOLOGICAL TREATMENT Nutrient Removal Processes MARK GEHRING TECHNICAL SALES MGR., BIOLOGICAL TREATMENT Presentation Outline 1. Nutrient removal, treatment fundamentals 2. Treatment strategies Treatment methods: CAS, SBR,

More information

General Information on Nitrogen

General Information on Nitrogen General Information on Nitrogen What is nitrogen? Nitrogen was discovered in 1772 by Daniel Rutherford in Scotland Nitrogen gas makes up nearly 80% of the air we breathe Nitrogen gas is not toxic Nitrogen

More information

General Operational Considerations in Nutrient and Wet Weather Flow Management for Wastewater Treatment Facilities Part II

General Operational Considerations in Nutrient and Wet Weather Flow Management for Wastewater Treatment Facilities Part II General Operational Considerations in Nutrient and Wet Weather Flow Management for Wastewater Treatment Facilities Part II Samuel Jeyanayagam, PhD, PE, BCEE Julian Sandino, PhD, PE, BCEE Ohio WEA Plant

More information

AquaNereda Aerobic Granular Sludge Technology

AquaNereda Aerobic Granular Sludge Technology Aerobic Granular Sludge AquaNereda Aerobic Granular Sludge Technology The AquaNereda Aerobic Granular Sludge (AGS) Technology is an innovative biological wastewater treatment technology that provides advanced

More information

NUTRIENT REMOVAL PROCESSES IN WASTEWATER TREATMENT. We re Glad You re Here!

NUTRIENT REMOVAL PROCESSES IN WASTEWATER TREATMENT. We re Glad You re Here! NUTRIENT REMOVAL PROCESSES IN WASTEWATER TREATMENT We re Glad You re Here! Please, put your cell phones on vibrate during sessions and, take calls to the hallway NUTRIENT REMOVAL PROCESSES IN WASTEWATER

More information

A REGULATORY GUIDE TO SEQUENCING BATCH REACTORS

A REGULATORY GUIDE TO SEQUENCING BATCH REACTORS A REGULATORY GUIDE TO SEQUENCING BATCH REACTORS Terry L. Kirschenman and Shahid Hameed Iowa Department of Natural Resources, Wallace State Office Building, 502 East 9th Street, Des Moines, Iowa, 50319-0034,

More information

BIOLOGICAL PHOSPHOROUS REMOVAL AN OPERATOR S GUIDE

BIOLOGICAL PHOSPHOROUS REMOVAL AN OPERATOR S GUIDE BIOLOGICAL PHOSPHOROUS REMOVAL AN OPERATOR S GUIDE ABSTRACT If you have ever faced a rising effluent phosphorous concentration and you are relying on biological phosphorous removal, the information offered

More information

Environmental Dynamics International

Environmental Dynamics International Corporate Profile Capabilities (EDI) specializes in the research, development, and application of advanced technology aeration and biological treatment solutions for municipal and industrial wastewater

More information

BEING GOOD STEWARDS: IMPROVING EFFLUENT QUALITY ON A BARRIER ISLAND. 1.0 Executive Summary

BEING GOOD STEWARDS: IMPROVING EFFLUENT QUALITY ON A BARRIER ISLAND. 1.0 Executive Summary BEING GOOD STEWARDS: IMPROVING EFFLUENT QUALITY ON A BARRIER ISLAND Brett T. Messner, PE, Tetra Tech, Inc., 201 E Pine St, Suite 1000, Orlando, FL 32801 Brett.Messner@tetratech.com, Ph: 239-851-1225 Fred

More information

ENVE 302 Environmental Engineering Unit Processes DENITRIFICATION

ENVE 302 Environmental Engineering Unit Processes DENITRIFICATION ENVE 302 Environmental Engineering Unit Processes CHAPTER: 9 DENITRIFICATION Assist. Prof. Bilge Alpaslan Kocamemi Marmara University Department of Environmental Engineering Istanbul, Turkey 1 BIOLOGICAL

More information

Preparing for Nutrient Removal at Your Treatment Plant

Preparing for Nutrient Removal at Your Treatment Plant Summer Seminar Emerging Issues in the Water/Wastewater Industry Preparing for Nutrient Removal at Your Treatment Plant Rajendra P. Bhattarai, P.E., BCEE Austin Water Utility Ana J. Peña-Tijerina, Ph.D.,

More information

Choices to Address Filamentous Growth

Choices to Address Filamentous Growth Michigan Water Environment Association Process Seminar November 12, 2015 Choices to Address Filamentous Growth Richard Beardslee City of Battle Creek Nathan Cassity Donohue & Associates Outline Battle

More information

Activated Sludge Treatment Extended Aeration (EA) and Sequencing Batch Reactor (SBR) Systems

Activated Sludge Treatment Extended Aeration (EA) and Sequencing Batch Reactor (SBR) Systems 1 Activated Sludge Treatment Extended Aeration (EA) and Sequencing Batch Reactor (SBR) Systems General Features KEE Process packaged and purpose-built activated sludge process systems are suitable for

More information

COMPARISON STUDY BETWEEN INTEGRATED FIXED FILM ACTIVATED SLUDGE (IFAS), MEMBRANE BIOREACTOR (MBR) AND CONVENTIONAL ACTIVATED SLUDGE (AS) PROCESSES

COMPARISON STUDY BETWEEN INTEGRATED FIXED FILM ACTIVATED SLUDGE (IFAS), MEMBRANE BIOREACTOR (MBR) AND CONVENTIONAL ACTIVATED SLUDGE (AS) PROCESSES Sixteenth International Water Technology Conference, IWTC 16 2012, Istanbul, Turkey 1 COMPARISON STUDY BETWEEN INTEGRATED FIXED FILM ACTIVATED SLUDGE (IFAS), MEMBRANE BIOREACTOR (MBR) AND CONVENTIONAL

More information

Watertown Wastewater Facility Plan. August 11, 2015

Watertown Wastewater Facility Plan. August 11, 2015 Watertown Wastewater Facility Plan August 11, 2015 Watertown Wastewater Wastewater Treatment Facility History Comprehensive Planning Wastewater Concerns Capacity Condition Permitting Requirements Watertown

More information

TWO YEAR CASE STUDY OF INTEGRATED FIXED FILM ACTIVATED SLUDGE (IFAS) AT BROOMFIELD, CO WWTP West 124th Street Broomfield, CO 80020

TWO YEAR CASE STUDY OF INTEGRATED FIXED FILM ACTIVATED SLUDGE (IFAS) AT BROOMFIELD, CO WWTP West 124th Street Broomfield, CO 80020 ABSTRACT TWO YEAR CASE STUDY OF INTEGRATED FIXED FILM ACTIVATED SLUDGE (IFAS) AT BROOMFIELD, CO WWTP Mr. Ken Rutt 1, Jim Seda 1 and Mr. Chandler H. Johnson 2 1 City & County of Broomfield 2985 West 124th

More information

W O C H H O L Z R E G I O N A L W A T E R R E C L A M A T I O N F A C I L I T Y O V E R V I E W

W O C H H O L Z R E G I O N A L W A T E R R E C L A M A T I O N F A C I L I T Y O V E R V I E W Facility Overview The recently upgraded and expanded Henry N. Wochholz Regional Water Reclamation Facility (WRWRF) treats domestic wastewater generated from the Yucaipa-Calimesa service area. The WRWRF

More information

2/22/2011. Presentation Outline. Overview of Wastewater Aeration. Basic Equation. Some Acronyms. dc dt. dc dt TDS BP T C L

2/22/2011. Presentation Outline. Overview of Wastewater Aeration. Basic Equation. Some Acronyms. dc dt. dc dt TDS BP T C L Presentation Outline Overview of Wastewater Aeration Randal W. Samstag, P.E. Carollo Engineers 1. Some definitions 2. Types of aeration devices 3. What affects aeration efficiency? 4. How is aeration efficiency

More information

Lagoons Operation and Management in New Brunswick

Lagoons Operation and Management in New Brunswick Lagoons Operation and Management in New Brunswick Lagoons Provide secondary treatment to domestic wastewater by the action of bacteria stabilizing the organic matter in the wastewater. Benefits of lagoons:

More information

Chapter 4 Alternatives for Centralized and Satellite Wastewater Treatment Facilities and Sites

Chapter 4 Alternatives for Centralized and Satellite Wastewater Treatment Facilities and Sites Chapter 4 Alternatives for Centralized and Satellite Wastewater Treatment Facilities and Sites CHAPTER 4 ALTERNATIVES FOR CENTRALIZED AND SATELLITE WASTEWATER TREATMENT FACILITIES AND SITES 4.1 INTRODUCTION

More information

Copies: Mark Hildebrand (NCA) ARCADIS Project No.: April 10, Task A 3100

Copies: Mark Hildebrand (NCA) ARCADIS Project No.: April 10, Task A 3100 MEMO To: Jeff Pelz (West Yost) Kathryn Gies (West Yost) Copies: Mark Hildebrand (NCA) ARCADIS U.S., Inc. 200 Harvard Mills Square Suite 430 Wakefield Massachusetts 01880 Tel 781 224 4488 Fax 781 224 3033

More information

Closed Loop Reactor (CLR) Process. Innovative Technology, Flexible Orientation and Energy Saving Designs

Closed Loop Reactor (CLR) Process. Innovative Technology, Flexible Orientation and Energy Saving Designs Closed Loop Reactor (CLR) Process Innovative Technology, Flexible Orientation and Energy Saving Designs Lakeside Biological Treatment Processes Lakeside s oxidation ditch experience since 1963 has led

More information

Domestic Waste Water (Sewage): Collection, Treatment & Disposal

Domestic Waste Water (Sewage): Collection, Treatment & Disposal Domestic Waste Water (Sewage): Collection, Treatment & Disposal Sanitary sewers Storm water sewers Combined sewers Types of sewers: Types of collection system Building sewer/building connections:connected

More information

MARPAK modular biomedia WASTEWATER TREATMENT

MARPAK modular biomedia WASTEWATER TREATMENT MARPAK modular biomedia WASTEWATER TREATMENT The Marley MARPAK Difference SPX Cooling Technologies is a world leader in the design, manufacturing and construction of evaporative cooling products. The design

More information

Removal of High C and N Contents in Synthetic Wastewater Using Internal Circulation of Anaerobic and Anoxic/Oxic Activated Sludge Processes

Removal of High C and N Contents in Synthetic Wastewater Using Internal Circulation of Anaerobic and Anoxic/Oxic Activated Sludge Processes Removal of High C and N Contents in Synthetic Wastewater Using Internal Circulation of Anaerobic and Anoxic/Oxic Activated Sludge Processes Nittaya Boontian School of Environmental Engineering, Institute

More information

Coupling Trickling Filter or RBC s with Activated Sludge

Coupling Trickling Filter or RBC s with Activated Sludge Coupling Trickling Filter or RBC s with Activated Sludge By John R. Harrison, P.E. Kennedy/Jenks Consultants 503-295-4911 or JohnHarrison@KennedyJenks.com 1. What are Combined or Coupled Plants? Most coupled

More information

Troubleshooting Activated Sludge Processes. PNCWA - Southeast Idaho Operators Section Pocatello, ID February 11, 2016 Jim Goodley, P.E.

Troubleshooting Activated Sludge Processes. PNCWA - Southeast Idaho Operators Section Pocatello, ID February 11, 2016 Jim Goodley, P.E. Troubleshooting Activated Sludge Processes PNCWA - Southeast Idaho Operators Section Pocatello, ID February 11, 2016 Jim Goodley, P.E. Outline Process Types & Kinetics Influent Monitoring Process Monitoring

More information

" Manhattan, MT 400,000 MGD Bio-Wheel TM Wastewater Treatment Plant "

 Manhattan, MT 400,000 MGD Bio-Wheel TM Wastewater Treatment Plant MSAWWA MWEA Conference Great Falls, Montana May 15, 2008 " Manhattan, MT 400,000 MGD Bio-Wheel TM Wastewater Treatment Plant " by Donald D. Ricketts, P.E., WTI and Robert Seamons, P.E., Stahly Engineering

More information

Technical Memorandum-Low Cost Retrofits for Nitrogen Removal at Wastewater Treatment Plants in the Upper Long Island Sound Watershed

Technical Memorandum-Low Cost Retrofits for Nitrogen Removal at Wastewater Treatment Plants in the Upper Long Island Sound Watershed Technical Memorandum-Low Cost Retrofits for Nitrogen Removal at Wastewater Treatment Plants in the Upper Long Island Sound Watershed Prepared by JJ Environmental, LLC Prepared for NEIWPCC First Draft:

More information

Integrated Activated Sludge and Biosolids Treatment to Conserve Energy & Waste Solids Disposal

Integrated Activated Sludge and Biosolids Treatment to Conserve Energy & Waste Solids Disposal Integrated Activated Sludge and Biosolids Treatment to Conserve Energy & Waste Solids Disposal Nathan Antonneau, P.E. Presentation Outline Typical Flowsheet Configurations Process Reconfiguration - ISBR

More information

Designing Single-Sludge Bionutrient Removal Systems

Designing Single-Sludge Bionutrient Removal Systems Designing Single-Sludge Bionutrient Removal Systems Richard O. Mines, Jr., Ph.D., P.E. Environmental Engineering Mercer University 2001 World Water & Environmental Resources Conference Orlando, FL Activated

More information

Environmental Biotechnology Cooperative Research Centre Date submitted: March 2008 Date published: March 2011

Environmental Biotechnology Cooperative Research Centre Date submitted: March 2008 Date published: March 2011 final report Project code: A.ENV.0044 Prepared by: Environmental Biotechnology Cooperative Research Centre Date submitted: March 2008 Date published: March 2011 PUBLISHED BY Meat & Livestock Australia

More information

Review of WEFTEC 2016 Challenge & Overview of 2017 Event. Malcolm Fabiyi, PhD, MBA Spencer Snowling, PhD. P.Eng

Review of WEFTEC 2016 Challenge & Overview of 2017 Event. Malcolm Fabiyi, PhD, MBA Spencer Snowling, PhD. P.Eng Review of WEFTEC 2016 Challenge & Overview of 2017 Event Malcolm Fabiyi, PhD, MBA Spencer Snowling, PhD. P.Eng Agenda Review 2016 Challenge Provide overview of updates to 2017 event Frequency WEFTEC Scores

More information

Advantages & Applications of MBBR Technologies

Advantages & Applications of MBBR Technologies Advantages & Applications of MBBR Technologies Wastewater Technologies Attached Growth Suspended Growth Static Fixed film Trickling filters Rope media Web media Biological active filters (BAF) Dynamic

More information

MODIFIED SEQUENTIAL BATCH REACTOR (MSBR) A NEW PROCESS OF WASTEWATER TREATMENT

MODIFIED SEQUENTIAL BATCH REACTOR (MSBR) A NEW PROCESS OF WASTEWATER TREATMENT Ninth International Water Technology Conference, IWTC9 2005, Sharm El-Sheikh, Egypt 105 MODIFIED SEQUENTIAL BATCH REACTOR (MSBR) A NEW PROCESS OF WASTEWATER TREATMENT Medhat M. A. Saleh * and Usama F.

More information

GRANULAR ACTIVATED SLUDGE

GRANULAR ACTIVATED SLUDGE CLARKE PRIZE CONFERENCE ON WATER SUSTAINABILITY GRANULAR ACTIVATED SLUDGE THE FUTURE OF BIOLOGICAL NUTRIENT REMOVAL JAMES BARNARD CONTENTS Early observations of granular sludge Selection processes in activated

More information

Integrated Fixed Film Activated Sludge (IFAS) System for Additional Nitrification at the Coldwater WWTP

Integrated Fixed Film Activated Sludge (IFAS) System for Additional Nitrification at the Coldwater WWTP Fishbeck, Thompson, Carr & Huber, Inc. Integrated Fixed Film Activated Sludge (IFAS) System for Additional Nitrification at the Coldwater WWTP Jim Flamming, P.E., Senior Process Engineer, FTC&H Dave Woodman,

More information

ECO-ANT21 Process ECO-ANT21 Corporation

ECO-ANT21 Process ECO-ANT21 Corporation 0 ECO-ANT21 Process 2010. 04. ECO-ANT21 Corporation 1. Company Factory view and diffuser production view 1. Company Diffuser packaging and Shipment preparation 1. Company Diffuser production and cleaning

More information

SECTION 14.0 BIOLOGICAL NUTRIENT REMOVAL

SECTION 14.0 BIOLOGICAL NUTRIENT REMOVAL SECTION 14.0 BIOLOGICAL NUTRIENT REMOVAL 14.1 INTRODUCTION Up to this point in the report, the physical and biochemical concepts considered for application to the secondary treatment sections of the three

More information

Fixed-Film Processes

Fixed-Film Processes Onsite Wastewater Treatment Systems Technology Fact Sheet 2 Fixed-Film Processes Introduction Description Fixed-film systems (FFS) are biological treatment processes that employ a medium such as rock,

More information

Evaluation of Conventional Activated Sludge Compared to Membrane Bioreactors

Evaluation of Conventional Activated Sludge Compared to Membrane Bioreactors Evaluation of Conventional Activated Sludge Compared to Membrane Bioreactors Short Course on Membrane Bioreactors 3/22/06 R. Shane Trussell, Ph.D., P.E. shane@trusselltech.com Outline Introduction Process

More information

Advances in Nitrogen and Phosphorus Removal at Low DO Conditions

Advances in Nitrogen and Phosphorus Removal at Low DO Conditions Advances in Nitrogen and Phosphorus Removal at Low DO Conditions Pusker Regmi Vail Operator Training Seminar 13 October, 2016 Wastewater Treatment and Energy The water quality industry is currently facing

More information

MBBR Wastewater Treatment Processes

MBBR Wastewater Treatment Processes MBBR Wastewater Treatment Processes by Harlan H. Bengtson, PhD, P.E. 1. Introduction The Moving Bed Biofilm Reactor (MBBR) wastewater treatment process is a relatively recent addition in the wastewater

More information

Dr Martin Peter *, Joachim Scholz & Victor Ferre. Contents

Dr Martin Peter *, Joachim Scholz & Victor Ferre. Contents Feedback from a metal processing industry MBR Plant in its 3rd Year of Operation:- An Analysis of the Flux, Effluent Quality and Membrane Lifetime Data to date Authors: Dr Martin Peter *, Joachim Scholz

More information

Aeration System Improvements with a 5-Year Payback. Scott Phipps

Aeration System Improvements with a 5-Year Payback. Scott Phipps Aeration System Improvements with a 5-Year Payback Scott Phipps Wastewater Treatment Aeration Timeline 1970 s Major infrastructure investment Quick and cheap solutions Coarse bubble diffusers & PD/MS blowers

More information

Use of Biowin for Process Troubleshooting / Design for a Unique Wastewater

Use of Biowin for Process Troubleshooting / Design for a Unique Wastewater Use of Biowin for Process Troubleshooting / Design for a Unique Wastewater OWEA Plant Operations and Lab Analysis Workshop W. James Gellner Outline Introduction / Problem Overview Plant Issues Biowin Overview

More information

OPERATION AND MANAGEMENT OF WASTEWATER TREATMENT PLANTS

OPERATION AND MANAGEMENT OF WASTEWATER TREATMENT PLANTS OPERATION AND MANAGEMENT OF WASTEWATER TREATMENT PLANTS Authors: Andrea Giordano Luigi Petta ENEA, Ente per le Nuove Tecnologie, l Energia e l Ambiente Bologna, Italy Keywords: Maintenance, Wastewater,

More information

ATTACHMENT 1 GENERAL FACILITY INFORMATION. BOD5 mg/l mg/l TSS mg/l mg/l NH3-N mg/l mg/l

ATTACHMENT 1 GENERAL FACILITY INFORMATION. BOD5 mg/l mg/l TSS mg/l mg/l NH3-N mg/l mg/l ATTACHMENT 1 GENERAL FACILITY INFORMATION 1. Facility Name: 2. Type of Facility: 3. Population Served: Present: Design: 4. Flow: Average Maximum Peak 5. Water Quality: Present Design Assumed Actual Source:

More information

Module 19 : Aerobic Secondary Treatment Of Wastewater. Lecture 24 : Aerobic Secondary Treatment Of Wastewater

Module 19 : Aerobic Secondary Treatment Of Wastewater. Lecture 24 : Aerobic Secondary Treatment Of Wastewater 1 P age Module 19 : Aerobic Secondary Treatment Of Wastewater Lecture 24 : Aerobic Secondary Treatment Of Wastewater 2 P age 19.1 Activated Sludge Process Conventional biological treatment of wastewater

More information

IWA Publishing 2012 Water Practice & Technology Vol 7 No 3 doi: /wpt

IWA Publishing 2012 Water Practice & Technology Vol 7 No 3 doi: /wpt IWA Publishing 2012 Water Practice & Technology Vol 7 No 3 Comparison of denitrification-nitrification and step-feed activated sludge processes with dynamic simulation K. Sahlstedt a, H. Haimi b and J.

More information

Case Study. BiOWiSH Aqua. Biological Help for the Human Race. Municipal Wastewater Bathurst Waste Water Treatment Works Australia.

Case Study. BiOWiSH Aqua. Biological Help for the Human Race. Municipal Wastewater Bathurst Waste Water Treatment Works Australia. Case Study BiOWiSH Aqua Municipal Wastewater Bathurst Waste Water Treatment Works Australia BiOWiSH Aqua Executive Summary The main objective of the validation was to quantify cost savings in using BiOWiSH.

More information

Nutrient Removal Enhancement Using Process Automation at Holly Hill

Nutrient Removal Enhancement Using Process Automation at Holly Hill F W R J Nutrient Removal Enhancement Using Process Automation at Holly Hill Brad T. Blais, Kevin A. Lee, John E. Olson, and David W. Dubey The City of Holly Hill, located on the Atlantic Coast just north

More information

19. AEROBIC SECONDARY TREATMENT OF WASTEWATER

19. AEROBIC SECONDARY TREATMENT OF WASTEWATER 19. AEROBIC SECONDARY TREATMENT OF WASTEWATER 19.1 Activated Sludge Process Conventional biological treatment of wastewater under aerobic conditions includes activated sludge process (ASP) and Trickling

More information

LAKESIDE Water Purification Since Bulletin #1218 Revised June Spiravac Clarifier. Peripheral Feed Center Takeoff Suction Sludge Removal

LAKESIDE Water Purification Since Bulletin #1218 Revised June Spiravac Clarifier. Peripheral Feed Center Takeoff Suction Sludge Removal LAKESIDE Water Purification Since 98 Bulletin #8 Revised June 999 Peripheral Feed Center Takeoff Suction Sludge Removal Copyright Lakeside Equipment Corporation 999 The Spiraflo principle has been successfully

More information

WWTF Capacity Assessment Project

WWTF Capacity Assessment Project Wastewater Treatment Facility Evaluation The Richland WWTF was constructed in 1985 to provide primary and secondary treatment for the City's wastewater. Section 3 includes a general description of the

More information

NITROGEN REMOVAL USING TERTIARY FILTRATION. Suzie Hatch & Colum Kearney. Sydney Water Corporation

NITROGEN REMOVAL USING TERTIARY FILTRATION. Suzie Hatch & Colum Kearney. Sydney Water Corporation Winner of Actizyme Prize for Best Paper at the NSW Operators Conference held in September 2004 NITROGEN REMOVAL USING TERTIARY FILTRATION Paper Presented by : Suzie Hatch & Colum Kearney Authors: Suzie

More information

USING NUMERICAL SIMULATION SOFTWARE FOR IMPROVING WASTEWATER TREATMENT EFFICIENCY

USING NUMERICAL SIMULATION SOFTWARE FOR IMPROVING WASTEWATER TREATMENT EFFICIENCY USING NUMERICAL SIMULATION SOFTWARE FOR IMPROVING WASTEWATER TREATMENT EFFICIENCY Catalina Raluca Mocanu, Lacramioara Diana Robescu University Politehnica of Bucharest, Spl. Independentei, nr. 313, sector

More information

Renovation of secondary treatment facility into the Step-feed Biological Nitrogen Removal Process by the effective use of the existing structure

Renovation of secondary treatment facility into the Step-feed Biological Nitrogen Removal Process by the effective use of the existing structure Renovation of secondary treatment facility into the Step-feed Biological Nitrogen Removal Process by the effective use of the existing structure Kiyohiko Hayashi Director, Toba Wastewater Treatment Plant,

More information

INVESTIGATION INTO REUSE OF DECOMMISSIONED STP INFRASTRUCTURE, IMPROVING TREATMENT OUTCOMES. Liz Millan & Aleisha Myles

INVESTIGATION INTO REUSE OF DECOMMISSIONED STP INFRASTRUCTURE, IMPROVING TREATMENT OUTCOMES. Liz Millan & Aleisha Myles INVESTIGATION INTO REUSE OF DECOMMISSIONED STP INFRASTRUCTURE, IMPROVING TREATMENT OUTCOMES Paper Presented by: Liz Millan & Aleisha Myles Authors: Liz Millan, Chief Trainer, Simmonds and Bristow & Aleisha

More information

Field Validation of Sequencing Batch Reactor and Cloth Media Filtration Technologies To Attain Ultra-Low Nutrient Levels

Field Validation of Sequencing Batch Reactor and Cloth Media Filtration Technologies To Attain Ultra-Low Nutrient Levels Field Validation of Sequencing Batch Reactor and Cloth Media Filtration Technologies To Attain Ultra-Low Nutrient Levels Terence K. Reid 1*, Al Zerbato 2, Rungrod Jittawattanarat 1, Lloyd W. Johnson 1,

More information

Chapter 11. Secondary Clarifiers

Chapter 11. Secondary Clarifiers ENVE 301 Environmental Engineering Unit Operations Chapter 11 Secondary Clarifiers Assist. Prof. Bilge Alpaslan Kocamemi Marmara University Department of Environmental Engineering Istanbul, Turkey 1 SECONDARY

More information

Innovative Use of Dissolved Air Flotation with Biosorption as Primary Treatment to Approach Energy Neutrality in WWTPs

Innovative Use of Dissolved Air Flotation with Biosorption as Primary Treatment to Approach Energy Neutrality in WWTPs Innovative Use of Dissolved Air Flotation with Biosorption as Primary Treatment to Approach Energy Neutrality in WWTPs H.-B. Ding *, M. Doyle **, A. Erdogan **, R. Wikramanayake ***, and P. Gallagher ***

More information

VARI-CANT Jet Aeration Systems. Water Technologies

VARI-CANT Jet Aeration Systems. Water Technologies VARI-CANT Jet Aeration Systems Water Technologies VARI-CANT Jet Aeration System VARI-CANT Jet Mixing System installed in circular basin. Superior Technology in Wastewater Treatment Jet Aeration History

More information

solutions technology available in HDPE with competitive pricing, to produce the cleanest, Featuring our innovative Bio-Film Reactor

solutions technology available in HDPE with competitive pricing, to produce the cleanest, Featuring our innovative Bio-Film Reactor HYDRO-KINETIC GREEN Featuring our innovative Bio-Film Reactor technology available in HDPE with competitive pricing, to produce the cleanest, most consistent effluent quality During its successful completion

More information

Membrane Bio-Reactors (MBRs) The Future of Wastewater Technology, Science and Economy Aspects

Membrane Bio-Reactors (MBRs) The Future of Wastewater Technology, Science and Economy Aspects Membrane Bio-Reactors (MBRs) The Future of Wastewater Technology, Science and Economy Aspects Glen T. Daigger, Ph.D., P.E., DEE, NAE Senior Vice President and Chief Technology Officer CH2M HILL Presented

More information

Figure Trickling Filter

Figure Trickling Filter 19.2 Trickling Filter A trickling filter is a fixed film attached growth aerobic process for treatment of organic matter from the wastewater. The surface of the bed is covered with the biofilm and as the

More information

Advances in Wastewater Treatment Technology

Advances in Wastewater Treatment Technology MWEA Annual Conference June 20, 2017 Advances in Wastewater Treatment Technology Nathan Cassity, Donohue Presentation Agenda History of Activated Sludge Process Advancement & Current Status Future Challenges

More information

Comparison on the Treatment Performance of Full-scale Sewage Treatment Plants using Conventional and Modified Activated Sludge Processes

Comparison on the Treatment Performance of Full-scale Sewage Treatment Plants using Conventional and Modified Activated Sludge Processes Comparison on the Treatment Performance of Full-scale Sewage Treatment Plants using Conventional and Modified Activated Sludge Processes FATIHAH SUJA 1, RAKMI ABDUL RAHMAN 2 AND OTHMAN JAAFAR 3 1,3 Department

More information

BioWin 3. New Developments in BioWin. Created by process engineers.. for process engineers

BioWin 3. New Developments in BioWin. Created by process engineers.. for process engineers BioWin 3 Created by process engineers.. for process engineers New Developments in BioWin The latest version of BioWin provides a host of additions and improvements to enhance your wastewater treatment

More information

WASTEWATER TREATMENT. Nelson Environmental Inc. Nelson Environmental Inc.

WASTEWATER TREATMENT. Nelson Environmental Inc. Nelson Environmental Inc. The OPTAER system provides reliable nutrient removal in pond based wastewater treatment plants combining cost-effective technologies and low maintenance requirements. WASTEWATER TREATMENT PrintStudioOne.com

More information

JTAC Presentation May 18, Nutrient Removal Process Fundamentals and Operation

JTAC Presentation May 18, Nutrient Removal Process Fundamentals and Operation JTAC Presentation May 18, 2017 Nutrient Removal 101 - Process Fundamentals and Operation Steve Polson, P.E. Presentation Goals Develop understanding of: Why to remove nutrients How to remove nutrients

More information

Overview of Supplemental Carbon Sources for Denitrification and Enhanced Biological Phosphorus Removal

Overview of Supplemental Carbon Sources for Denitrification and Enhanced Biological Phosphorus Removal JANUARY 19, 2017 Overview of Supplemental Carbon Sources for Denitrification and Enhanced Biological Phosphorus Removal Maahedi Savvy & Brad Hice, EOSi, Massachusetts Speakers Brad Hice, P.E., Business

More information

Outline. Introduction Case Studies. Anoxic Zone Mixing Channel Mixing. Theory and Criteria. Mixing Theory Design Criteria.

Outline. Introduction Case Studies. Anoxic Zone Mixing Channel Mixing. Theory and Criteria. Mixing Theory Design Criteria. Outline Introduction Case Studies Anoxic Zone Mixing Channel Mixing Theory and Criteria Mixing Theory Design Criteria Recommendations Where Do We Mix at WWTPs? Introduction Flow Equalization Tanks Headworks

More information

WEFTEC.06. **Cobb County Water System, Marietta, Georgia

WEFTEC.06. **Cobb County Water System, Marietta, Georgia CHEMICALLY ENHANCED PRIMARY TREATMENT FOR A LARGE WATER RECLAMATION FACILITY ON A CONSTRICTED SITE - CONSIDERATIONS FOR DESIGN, START-UP, AND OPERATION ABSTRACT Jeffrey A. Mills, P.E., BCEE,* Roderick

More information

Primary Clarifier Odor Control Replacing Nitrates with D.O. Kevin Jacobs, P.E. ECO Oxygen Technologies

Primary Clarifier Odor Control Replacing Nitrates with D.O. Kevin Jacobs, P.E. ECO Oxygen Technologies Primary Clarifier Odor Control Replacing Nitrates with D.O. Kevin Jacobs, P.E. ECO Oxygen Technologies Presentation Outline Primary Clarifier Odor Challenges Odor Treatment Options Case Study Anson-Madison

More information

Removal of High Ammonia Levels from Municipal Wastewater Using Humic Acid and Selective Bio-Augmentation

Removal of High Ammonia Levels from Municipal Wastewater Using Humic Acid and Selective Bio-Augmentation Removal of High Ammonia Levels from Municipal Wastewater Using Humic Acid and Selective Bio-Augmentation Prepared by: Brent W. Cowan, P.E. Coatesville, PA 19320 Steven M. Cawley Cawley Environmental Services,

More information

Field and CFD Analysis of Jet Aeration and Mixing

Field and CFD Analysis of Jet Aeration and Mixing Field and CFD Analysis of Jet Aeration and Mixing Randal W. Samstag 1 *, Edward A. Wicklein 1, Roderick D. Reardon 2, Robert J. Leetch 3, R. (Robbie) M. Parks 3, and Colin D. Groff 3 1 Carollo Engineers,

More information

Biological Nutrient Removal Processes

Biological Nutrient Removal Processes Chapter 22 Biological Nutrient Removal Processes Overview of Biological Nutrient Removal 22-3 Biological Selectors 22-6 Growth Zones 22-6 Selector Size and Equipment 22-10 Yardsticks for Measuring Biological

More information

COMPARISON OF PROCESS ALTERNATIVES FOR ENHANCED NUTRIENT REMOVAL: PERSPECTIVES ON ENERGY REQUIREMENTS AND COSTS

COMPARISON OF PROCESS ALTERNATIVES FOR ENHANCED NUTRIENT REMOVAL: PERSPECTIVES ON ENERGY REQUIREMENTS AND COSTS COMPARISON OF PROCESS ALTERNATIVES FOR ENHANCED NUTRIENT REMOVAL: PERSPECTIVES ON ENERGY REQUIREMENTS AND COSTS Derya Dursun 1, Jose Jimenez 1, Aaron Briggs 2 1 Brown and Caldwell, 850 Trafalgar Court,

More information

Constructed Wetlands

Constructed Wetlands Constructed Wetlands Constructed Wetlands Artificial wastewater treatment systems consisting of shallow ponds or channels which have been planted with aquatic plants to treat wastewater. Rely upon natural

More information

A Hybrid Constructed Wetland System for Decentralized Wastewater Treatment

A Hybrid Constructed Wetland System for Decentralized Wastewater Treatment A Hybrid Constructed Wetland System for Decentralized Wastewater Treatment C. Kinsley 1, A. Crolla 1, J. Rode 1,2, R. Zytner 2 1 Ontario Rural Wastewater Centre, Université de Guelph-Campus d Alfred 2

More information

Inlet Process air and wash cycle scour air. Air grid Floor Nozzle

Inlet Process air and wash cycle scour air. Air grid Floor Nozzle BIOSTYR Wastewater BIOSTYR Mastering advanced technology Veolia Water Solutions & Technologies has more than 20 years experience of supplying and operation BAFF (Biological Activated Flooded Filter) processes

More information

Ovivo Carrousel Systems

Ovivo Carrousel Systems Ovivo Carrousel Systems Ovivo (formerly Eimco Water Technologies) has been providing Carrousel Systems since 1979. With over 700 installations, we have continuously improved the technology over the last

More information

MRI Wastewater Inclined Plate Settlers Performance Advantages

MRI Wastewater Inclined Plate Settlers Performance Advantages MRI Wastewater Inclined Plate Settlers Performance Advantages Suitable for municipal or industrial applications, performance advantages include: Smaller basin footprint than open clarifiers Significantly

More information

AS-H Iso-Disc Cloth Media Filter

AS-H Iso-Disc Cloth Media Filter AS-H Iso-Disc Cloth Media Filter Tertiary filtration and final polishing of wastewaters in municipal and industrial applications Toby.Sedgwick@AlfaLaval.com Slide 2 Typical Performance Range Influent Average

More information

SEQUENCING BATCH REACTOR FOR ORGANICS AND NITROGEN REMOVAL: MODELING AND DESIGN OPTIMIZATION VELMURUGAN SUBRAMANIAN

SEQUENCING BATCH REACTOR FOR ORGANICS AND NITROGEN REMOVAL: MODELING AND DESIGN OPTIMIZATION VELMURUGAN SUBRAMANIAN SEQUENCING BATCH REACTOR FOR ORGANICS AND NITROGEN REMOVAL: MODELING AND DESIGN OPTIMIZATION By VELMURUGAN SUBRAMANIAN Bachelor of Engineering in Civil Engineering Master of Engineering in Environmental

More information

A Review of the Current State of Knowledge on Phosphorus Removal

A Review of the Current State of Knowledge on Phosphorus Removal A Review of the Current State of Knowledge on Phosphorus Removal Sam Jeyanayagam, Ph.D., P.E., BCEE Senior Associate Malcolm Pirnie sjeyanayagam@pirnie.com Phone: (614) 430-2611 OWEA Conference 16 June

More information

Improving Septic Tank Performance by Enhancing Anaerobic Digestion NOWRA Onsite Wastewater Mega-Conference

Improving Septic Tank Performance by Enhancing Anaerobic Digestion NOWRA Onsite Wastewater Mega-Conference Improving Septic Tank Performance by Enhancing Anaerobic Digestion NOWRA Onsite Wastewater Mega-Conference Christopher Jowett October 23, 2017 Outline Anaerobic 101 Important factors influencing treatment

More information