Copies: Mark Hildebrand (NCA) ARCADIS Project No.: April 10, Task A 3100
|
|
- Cordelia Singleton
- 6 years ago
- Views:
Transcription
1 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 Tel Fax From: Susan Landon (BOS) Joe Husband (WHI) Date: ARCADIS Project No.: April 10, Task A 3100 Subject: Special Design Study TM #1a - Chemically Enhanced Primary Treatment (CEPT) Evaluation BACKGROUND INFORMATION Objective This Enhanced Primary Treatment Evaluation involves an investigation of two technologies identified by the City of Davis that could reduce the loadings to the secondary treatment processes: Chemically Enhanced Primary Treatment (CEPT) and use of fine screens. This technical memorandum (TM) focuses on the application of CEPT. Chemically Enhanced Primary Treatment CEPT is based on the addition of a coagulant and a polyelectrolyte (polymer) as flocculation aid to increase the capture of suspended and colloidal wastewater particles in a primary sedimentation tank. CEPT can provide more consistent primary treatment performance as well as the ability to operate primary treatment at higher flows. The reduced organic and solids loads benefit downstream treatment processes with the potential to increase the capacity of existing facilities or reduce the sizing of new facilities. In the coagulant stage, coagulant is rapidly dispersed into the wastewater using a high energy mixing process, typically an in-line pipe mixing device or a rapid mix tank. Design mixing time is typically less than one minute at design average flow. The coagulant destabilizes the electrical charges on the 1/8
2 suspended solids and colloidal particles in the wastewater which enables particles to combine or flocculate. Coagulant chemicals typically used are iron or aluminum metal salts but lime has also had some application. The most commonly used coagulant at municipal WWTPs is ferric chloride with ferrous chloride, aluminum sulfate (alum) and polyaluminum chloride also used to a lesser extent. Lime has many disadvantages over the iron and aluminum chemicals. Its effectiveness is ph dependent and significant dose rates are required to achieve the effective ph level and lime is also more difficult to handle and store. For these reasons lime will not be considered further. Anionic polymers are often used to enhance the particle flocculation process when a coagulant chemical is used. Polymer, if used, is mixed into the wastewater in a flocculation stage which is typically a tank, channel or other structure that provides low energy mixing to promote contact between wastewater particles and the polymer so that they agglomerate into larger flocculated particles, called floc. The flocculated wastewater than enters into a quiescent settling basin to settle out the floc. The chemical treatment results in more suspended solids getting captured and the resulting larger wastewater particles will settle out faster compared to conventional (non-chemical addition) settling. Ideally, the flocculation detention time is 20 to 30 minutes; however, many facilities have operated with coagulation times of 1 to 5 minutes using the influent feed channels to primary settling tanks, such as the Arlington County WPCP, VA. CEPT will increase total suspended solids (TSS) and biochemical oxygen demand (BOD) removals above conventional primary clarification removals depending on the coagulant and flocculant dose rate, the wastewater characteristics and hydraulic features of the settling tank. Much information has been published about CEPT projects and associated performance, including results from full-scale testing and operations. While the majority of the papers focus on use of CEPT for peak flow scenarios to treat wet weather and combined sewer flows, some papers and technical sources reported on the use of CEPT for day-to-day performance improvements. A review of the available literature indicated that a well performing CEPT system can achieve a 75% to 80% average removal of influent TSS and 50% or greater influent BOD removal. Specific removal efficiencies are dependent on the wastewater characteristics of the raw influent. For example, wastewater with a high fraction of soluble BOD to total BOD would not achieve a significant improvement in BOD removal. Ferric chloride was the coagulant used at the facilities reported in the literature for continuous chemical addition with chemical dose generally ranging from 20 to 40 mg/l. Polymer was infrequently used and when utilized, was applied at less than 0.5 mg/l. Current and Projected Primary Settling Tank Performance The primary sedimentation tanks were designed for an average dry weather flow of 7.5 MGD and a peak wet weather flow of 19 MGD. As reported in West Yost Draft TM entitled Basis of Design for the City of Davis Wastewater Treatment Plant Secondary and Tertiary Improvements dated 31 October 2012 (Draft Basis of Design Memo), the primary clarifiers are removing approximately 63% TSS and 31% BOD at an 2/8
3 average surface overflow rate of approximately 700 gpd/sf. This is typical primary clarifier performance for a municipal wastewater treatment facility. As noted in this TM there is not a strong correlation between TSS removals and overflow rates or influent TSS. This would indicate that the existing primary clarifiers are likely removing all settleable solids. Other Treatment Considerations with CEPT Other wastewater treatment considerations should be factored in when considering CEPT including the following: Chemical sludge production and sludge processing impacts Alkalinity reduction Phosphorus reduction Metals removal Disinfection Biological Nutrient Removal Sludge Production CEPT increases the primary sludge production compared to conventional clarification due to the increased solids removed from the wastewater and the production of chemical sludge. The use of iron and aluminum-based coagulants results in the production of chemical sludge formed by the metal hydroxide, iron sulfides and other inorganic compounds found in wastewater. These compounds add volume, weight and water to the sludge. The increased quantity of primary sludge will be partially offset by reduced production of secondary waste sludge, however, the primary sludge will likely be more difficult to thicken and dewater, particularly if lime or aluminum chemicals are used. The additional sludge production needs to be considered in the capacity of existing or new sludge treatment units. Specifically, the impact on digestion process needs to consider the additional volume of sludge and ratio of primary sludge to biological sludge. Of concern would the additional solids and potentially lower solids concentration would increase the volume of solids going to the existing anaerobic digester. A general rule of thumb of chemical sludge production is: Ferric Chloride = 0.92 mg TSS/mg of ferric chloride addition Alum = 0.33 mg TSS/mg of alum 3/8
4 Alkalinity Demand The chemical reactions that occur with the iron and aluminum based coagulants also consume alkalinity. Additionally, chemicals like ferric chloride and alum are acidic in nature. The impact of any alkalinity reduction on downstream biological treatment, particularly nitrification, and on effluent ph permit limitations will depend on the wastewater characteristics and its alkalinity levels. Supplemental alkalinity addition with a chemical such as lime or caustic soda may be required to mitigate any treatment impacts. Alkalinity reduction for alum and ferric chloride are generally 0.5 mg/l CaCO 3 /mg alum and 0.92 mg/l CaCO 3 /mg ferric chloride. As noted in the Basis of Design Memo, the City is planning to change its water supply from the current intermediate groundwater well source to a combination of deep aquifer wells and treated surface water from the Sacramento River. One effect of this change would be that water supply alkalinity and ph will both decrease, potentially significantly. Accordingly, the use of CEPT would further decrease the alkalinity feed to the biological treatment process and, possibly increase the supplemental alkalinity requirement. Phosphorus Removal Iron and aluminum salts are commonly used at WWTPs for phosphorus reductions in the wastewater. The iron and aluminum ions react with soluble ortho-phosphorus (OPO 4 ) to form an insoluble compound, or precipitate, that settles out in primary sedimentation. Organic phosphorus associated with wastewater solids is also captured in primary sedimentation. Therefore chemical addition to enhance primary sedimentation will also result in some phosphorus reduction. The phosphorus reduction could range from 50% to 90% depending on the chemical dose rate, CEPT effectiveness and the OPO4 wastewater levels and other wastewater characteristics. Typically, the dosing rate for CEPT will reduce the OPO 4 to a range of 1 to 2 mg/l. The potential for phosphorus reduction should be carefully assessed since levels of primary effluent phosphorus that are too low could result in a nutrient deficiency in the downstream biological process. Metal Removal There may be a minimal reduction of heavy metals associated with the removal of wastewater particles during sedimentation but this CEPT effect was not addressed in the literature that was reviewed. The removal of heavy metals in wastewater treatment plants is most commonly based on precipitating the metals as metal hydroxides through the addition of lime to produce a ph of minimum solubility for the particular metal. Heavy metals that can be removed with ph adjustment include cadmium, mercury, nickel and zinc. 4/8
5 Disinfection The selection of a coagulant chemical should also consider the type of WWTP effluent disinfection. Iron-based chemicals can negatively impact ultraviolet (UV) disinfection due to the presence of iron which can interfere with the transmission of UV light. This is not an issue for the Davis WWTP since chlorine disinfection is used. Biological Nutrient Removal (BNR) While the lower loading of suspended solids to the BNR process is often helpful in reducing the solids production in the biological process, it can reduce the amount of carbon available to help in BNR processes such as phosphorus or nitrogen removal. When evaluating the pro and cons of using CEPT, the use of dynamic process models are required to best evaluate the impact on the BNR process and the potential need for external carbon sources to achieve the nutrient removal goal. Application of CEPT The application of CEPT to the Davis WWTP was generally assessed for potential advantages and disadvantages on the wastewater and sludge handling processes. The Wastewater Planning Charrette, Table 2-1, stated that after aerated grit removal and primary sedimentation the effluent contains about 30 to 40 and 50 to 70 percent [of] the influent total suspended solids (TSS) and biochemical oxygen demand (BOD), respectively. This information is interpreted as the baseline is 60 to 70% TSS capture and 30 to 40% BOD capture for the existing or planned primary treatment performance. CEPT could then be projected to increase the average removals to 75 to 80% TSS and 45 to 50% BOD. A key consideration with CEPT as mentioned previously is the additional sludge production. The capture of additional wastewater solids and generation of chemical sludge can result in 40 to 50% more primary sludge than a system without chemical addition. As an example, for a typical ferric chloride dose rate of 25 mg/l and TSS removals increased from 65% to 75%, the primary sludge quantity increase attributed to the additional captures solids is approximately 15% and the increase attributed to chemical sludge is 28%, for a net increase of about 43%. The solids handling processes need to be carefully assessed for the capacity to treat the additional sludge as well as taking into consideration that the CEPT primary sludge may not thicken and/or dewater as effectively as non-cept sludge. Primary sludge is thickened in the primary settling tanks, thus the combination of more sludge and less concentrated sludge would increase the volume being discharged to the existing anaerobic digesters. The key benefit for CEPT for day-to-day operation is the reduction of primary effluent solids and organic loadings by as much as 15 to 25%. This reduction can translate into reduced biological treatment capacity for new biological treatment facilities or increased treatment capacity in existing facilities depending on the 5/8
6 treatment process. Similar reductions in secondary sludge production on downstream sludge processing (thickening, digestion and dewatering), however, will be offset by increased primary sludge production. The example 25 mg/l ferric chloride dose rate is estimated to also reduce alkalinity by approximately 37%. This may be significant if influent wastewater levels are on the low side (less than 80 to 100 mg/l) and biological nitrification is being used. Nitrification consumes alkalinity at approximately a 7.1:1 ratio of ammonia nitrogen. The presence of low alkalinity wastewater levels in combination with a low ph coagulant chemical could result in reduced ph levels and insufficient alkalinity leading to suppressed nitrification. Chemical System Requirements Site-specific testing at a WWTP considering CEPT is always recommended to better evaluate the CEPT process and better project performance. Jar testing, at a minimum, should be performed to assess the effectiveness of one or more metal salts and in combination with polymer. Ideally, full scale testing could be performed to better evaluate actual conditions. Testing can help target the effective dose rates and the associated sizing for chemical storage and feed equipment, as well as impacts on key compounds that may be of concern including alkalinity and phosphorus levels. The results of jar testing and/or full-scale CEPT tests can provide valuable information not only on the primary sedimentation performance but also the potential reduction of solids and organic loads to secondary treatment. This information can be used in conjunction with wastewater process models to better assess the impacts on existing secondary treatment or to better size new facilities. Chemical storage facilities for iron and aluminum chemicals are generally designed for a 30-day storage volume at the WWTP design average flow and the chemical design dose rate. Consideration should also be given to chemical requirements for extended peak conditions such as maximum month. Smaller facilities may also want to factor in the volume of a typical chemical delivery truck and size storage for 1.5 times the delivery volume since receiving a full truckload may be more cost effective than a partial load. Multiple more storage tanks, or one storage tank and one day tank, should be considered to allow for maintenance of storage equipment. A minimum of one feed pump with a standby unit should be provided with pumps sized for maximum chemical feed rate. The number and size of pumps should also consider if plant flows are expected to increase in time and actual start-up conditions will be significantly less than design flows, or there is a significant range of flow, and conditions exceed the turndown range of the pumps. The type of polymer system facilities will depend on whether polymer in dry or liquid form will be used. Dry polymer requires special wetting and handling equipment and a minimum aging to properly prepare a diluted polymer solution. Dry polymer also creates dust when handled creating a minor safety hazard. Liquid polymer is available in emulsion (oil-based form) and solution form with varying range of activities. 6/8
7 Liquid polymers are easier to blend and activate and are readily supplied in bulk or tote form. The number and size of polymer feed pumps have similar consideration to the coagulant chemical pumps. Recommendation The existing primary clarifiers are sized for an average flow of 7.5 mgd and a peak flow of 19 mgd and have performed as expected with primary suspended solids and BOD 5 removal in the range expected for municipal wastewater treatment facilities at current include flows (5 mgd). The use of chemicals to increase the suspended solids and BOD 5 removal does not appear to be justified based on the expected continued good performance. Also, the ancillary issues associated with CEPT specifically, additional chemical solids, reduced capacity within the existing digesters and increase alkalinity demand does not appear to justify CEPT at this time. The use of CEPT may be considered in the future if the plant influent flows increase beyond the current expectations. PROJECT CRITERIA Minimum Requirements Modifications to the preliminary and primary treatment systems necessary to implement required control system upgrades, implement power supply modifications, or accommodate new plant drain pipelines will be necessary. Performance Criteria Performance criteria, if any, are defined in the City of Davis Wastewater Treatment Plant Secondary and Tertiary Improvements Project Charrette Implementation Plan by West Yost Associates, dated March REFERENCE PROJECT Reference project components, if any, are presented in the City of Davis Wastewater Treatment Plant Secondary and Tertiary Improvements Project Reference Project Report by West Yost Associates and ARCADIS, dated May /8
8 REFERENCES WEF MOP 8, Design of Municipal Wastewater Treatment Plants, Volume 2: Liquid Treatment Processes, WEF, ASCE and EWRI, Fifth Edition (MOP 8). West Yost, Draft Technical Memorandum Basis of Design for the City of Davis Wastewater Treatment Plant Secondary and Tertiary Improvements dated 31 October 2012 Schroeder.E, and Tchobanoglous, G. City of Davis Wastewater Planning Charrette Report, 29 January /8
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 informationMEETING COLUMBUS S TREATMENT LIMITS
MEETING COLUMBUS S TREATMENT LIMITS EVEN WHEN WET WEATHER CHANGES THEM Improving Quality of Life AGENDA CEPT Background CEPT Preliminary Testing CEPT Design and Construction CEPT NPDES Permit Modification
More informationPHOSPHORUS REMOVAL: TREATMENT
PHOSPHORUS REMOVAL: TREATMENT TECHNOLOGIES AND CAPABILITIES Jane Madden, PE, BCEE Senior Vice President CAWPCA Fall Workshop November 14, 2014 Agenda Phosphorus Removal Overview Phosphorus Regulations
More informationWEFTEC.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 informationU. S. Army Corps of Engineers Metals Precipitation Checklist
U. S. Army Corps of Engineers Metals Precipitation Checklist Installation Name Site Name / I.D. Evaluation Team Site Visit Date This checklist is designed to facilitate the performance evaluation of a
More informationRemoving Heavy Metals from Wastewater
Removing Heavy Metals from Wastewater Engineering Research Center Report David M. Ayres Allen P. Davis Paul M. Gietka August 1994 1 Removing Heavy Metals From Wastewater Introduction This manual provides
More informationAn Introduction to Chemically Enhanced Primary Treatment
An Introduction to Chemically Enhanced Primary Treatment Frédéric Chagnon and Donald R. F. Harleman Research Assistant, Ford Professor of Environmental Engineering, Emeritus Department of Civil and Environmental
More informationPhosphorus Removal Treatment Alternatives
Phosphorus Removal Treatment Alternatives A Plainville, CT Case Study June 14, 2017 Paul Moran, P.E. Presentation Outline Case Study: Plainville, CT Phosphorus Removal Phosphorus Removal Overview Biological
More informationWastewater Treatment Processes
Wastewater Treatment Processes (Sep 27 th and 28 th, 2016) by Dr. Arun Kumar (arunku@civil.iitd.ac.in) Objective: To learn about processes used in tertiary treatment Courtesy: Dr. Irene Xagoraraki, MSU,
More informationLysis and Autooxidation. Organic Nitrogen (net growth) Figure by MIT OCW.
Bacterial Decomposition any hydrolysis Nitrification Organic Nitrogen (proteins; urea) O Ammonia Nitrogen 2 Nitrate (NO - O 2 ) 2 Nitrate (NO- 3 ) Assimilation Organic Nitrogen (bacterial cells) Lysis
More informationA 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 informationMeeting SB1 Requirements and TP Removal Fundamentals
Meeting SB1 Requirements and TP Removal Fundamentals June 5, 2017 Agenda SB1 requirements for P TP removal mechanisms Biological removal Chemical removal SB No. 1 Requirements for Phosphorus ** WWTP /
More informationEast Coast P Removal Technology Performance Summary
East Coast P Removal Technology Performance Summary Charles B. Bott Hampton Roads Sanitation District NonReactive Phosphorus Workshop Spokane, Washington August 11 12, 2009 Acknowledgements Numerous slides
More informationWastewater Treatment Processes
Wastewater Treatment Processes CEL212 Environmental Engineering (2 nd Semester 2010-2011) Dr. Arun Kumar (arunku@civil.iitd.ac.in) Department of Civil Engineering Indian Institute of Technology (Delhi)
More informationEVALUATING ALTERNATIVES FOR DISPOSING OF WATER PLANT SOLIDS INTO A WASTEWATER PLANT
EVALUATING ALTERNATIVES FOR DISPOSING OF WATER PLANT SOLIDS INTO A WASTEWATER PLANT Matthew Valade, P.E. July 25, 2014 Barboe.pptx Presentation Outline Project Background Why Dewater Croton Residuals Offsite?
More informationUnit Treatment Processes in Water and Wastewater Engineering
Unit Treatment Processes in Water and Wastewater Engineering T J Casey AQUAVARRA RESEARCH LIMITED 22A Brookfield Avenue Blackrock Co. Dublin. October 2006 Author s Note Water and wastewater treatment technology
More informationComparison of Three Wet Weather Flow Treatment Alternatives to Increase Plant Capacity
CSWEA 2013 Comparison of Three Wet Weather Flow Treatment Alternatives to Increase Plant Capacity Don Esping, Denny Parker, Jose Jimenez, Fenghua Yang, Tim Bate, Steve Arant May 16 2013 Milwaukee MSD South
More informationPilot Testing Reveals Alternative Methods to Meet Wisconsin s Low Level Phosphorus Limits
Pilot Testing Reveals Alternative Methods to Meet Wisconsin s Low Level Phosphorus Limits Rachel M. Lee 1*, Jane M. Carlson 1, Jeremy Bril 2, Jeremy Cramer 3, Jeff Harenda 4 1 Strand Associates, Inc.,
More informationLowering The Total Cost Of Operation
Lowering The Total Cost Of Operation The system removes more solids than conventional clarification, so filters can run longer between backwash cycles. Fewer backwash cycles means less backwash water,
More informationWastewater Treatment. Where does wastewater go when it leaves your house?
Wastewater Treatment Where does wastewater go when it leaves your house? Let s s take a look The process includes: Collection of wastewater Primary Treatment Secondary Treatment Solids Handling Influent
More informationWASTEWATER TREATMENT PLANT MASTER PLAN 6. BUSINESS CASE EVALUATION OF ALTERNATIVES
WASTEWATER TREATMENT PLANT MASTER PLAN 6. BUSINESS CASE EVALUATION OF ALTERNATIVES A range of potential ammonia limits were identified for alternatives evaluation, as discussed in Section 2.2.5. This chapter
More informationComparison of Three Wet Weather Flow Treatment Alternatives to Increase Plant Capacity
OWEA 2013 Comparison of Three Wet Weather Flow Treatment Alternatives to Increase Plant Capacity Don Esping, Denny Parker, Jose Jimenez, Fenghua Yang, Tim Bate, Steve Arant June 19 2013 Outline Background/Goals
More informationENVIRONMENTAL ENGINEERING LECTURE 3: WATER TREATMENT MISS NOR AIDA YUSOFF
ENVIRONMENTAL ENGINEERING LECTURE 3: WATER TREATMENT MISS NOR AIDA YUSOFF LEARNING OUTCOMES Define the concept and process of water treatment. Describe the concept of coagulation, flocculation, and sedimentation
More informationHeavy Metals Removal
Heavy Metals Removal Enhancing the Co-Precipitation Process for Heavy Metal Industrial Waste Treatment By Daniel Christodoss Ph.D., Stephen A. Veale, and Terry L. Bires Science Applications International
More informationPreparing 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 informationBiological Phosphorous Removal Is Coming! Michigan Water Environment Association Annual Conference, June 23, 2008; Boyne Falls MI
Biological Phosphorous Removal Is Coming! Michigan Water Environment Association Annual Conference, June 23, 2008; Boyne Falls MI EUTROPHICATION CHOPNS CO 2 H 2 0 PO 4 NH 4 SO 4 CHOPNS NO 3 1 lb P grows
More informationBOD5 REMOVALS VIA BIOLOGICAL CONTACT AND BALLASTED CLARIFICATION FOR WET WEATHER M. COTTON; D. HOLLIMAN; B. FINCHER, R. DIMASSIMO (KRUGER, INC.
BOD REMOVALS VIA BIOLOGICAL CONTACT AND BALLASTED CLARIFICATION FOR WET WEATHER M. COTTON; D. HOLLIMAN; B. FINCHER, R. DIMASSIMO (KRUGER, INC.) Bench-scale testing was conducted to quantify the effectiveness
More informationAmerican Water College 2010
Vocabulary Activated Sludge (Part 1) Activated Sludge Sludge particles produced in raw or settled wastewater (primary effluent) by the growth of organisms (including zoogleal bacteria) in aeration tanks
More informationThe NEORSD Demonstration of a Cost-Effective Solution
2015 OWEA Technical Conference Advancing Wet Weather Treatment The NEORSD Demonstration of a Cost-Effective Solution June 24, 2015 Advancing Wet Weather Treatment The NEORSD Demonstration of a Cost-Effective
More informationStartup and Performance of the World s first Large Scale Primary Dissolved Air Floatation Clarifier ABSTRACT KEYWORDS INTRODUCTION
Startup and Performance of the World s first Large Scale Primary Dissolved Air Floatation Clarifier Bruce R. Johnson 1 *, Jennifer Phillips 2, Tim Bauer 3, Greg Smith 4, George Smith 5, John Sherlock 6
More informationDuffin Creek Water Pollution Control Plant Technical Information
Duffin Creek Water Pollution Control Plant Technical Information Plant History The Duffin Creek Water Pollution Control Plant (WPCP) is located on the northern shore of Lake Ontario in the City of Pickering
More informationMUNICIPALITY OF WEST ELGIN WEST LORNE WASTEWATER TREATMENT PLANT
MUNICIPALITY OF WEST ELGIN WEST LORNE WASTEWATER TREATMENT PLANT 214 ANNUAL REPORT uary 1 to ember 31, 214 Environmental Compliance Approval # 3-442-9-938 Prepared by: Table of Contents Section 1: Overview...
More informationThe Municipality of North Grenville
A solution is required to increase the peak flow capacity of the Kemptville WPCP, a conventional activated sludge process, within a small footprint while maintaining good effluent quality. Location: Kemptville
More informationPerformance Evaluation of the Moores Creek Advanced Water Resource Recovery Facility
Performance Evaluation of the Moores Creek Advanced Water Resource Recovery Facility Richard W. Gullick, Ph.D. Director of Operations Timothy Castillo Wastewater Manager Presented to the Albemarle County
More informationBiological Phosphorus Removal Technology. Presented by: Eugene Laschinger, P.E.
Biological Phosphorus Removal Technology Presented by: Eugene Laschinger, P.E. Overview What is phosphorus and why do we care? How can you remove phosphorus? Biological phosphorus removal Biological phosphorus
More informationTDS AND SLUDGE GENERATION IMPACTS FROM USE OF CHEMICALS IN WASTEWATER TREATMENT
TDS AND SLUDGE GENERATION IMPACTS FROM USE OF CHEMICALS IN WASTEWATER TREATMENT ABSTRACT Jurek Patoczka, PhD, PE Hatch Mott MacDonald 27 Bleeker Str., Millburn, NJ 07041 jurek.patoczka@hatchmott.com The
More informationWatertown 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 informationBest Practice in Sewage and Effluent Treatment Technologies
Best Practice in Sewage and Effluent Treatment Technologies Contents 1 Wastewater - Introduction 1 1.1 Earth s ecological system 1 1.1.1 Water effect on ecology 2 1.1.2 Wastewater generation 3 1.2 Wastewater
More informationUV DISINFECTION OF LOW TRANSMITTANCE PHARMACEUTICAL WASTEWATER
UV DISINFECTION OF LOW TRANSMITTANCE PHARMACEUTICAL WASTEWATER Jurek Patoczka, PhD, PE Hatch Mott MacDonald, 27 Bleeker Str., Millburn, NJ 74 jurek.patoczka@hatchmott.com ABSTRACT An UV disinfection system
More informationReview 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 informationHIGH RATE TREATMENT AS PART OF THE SOLUTION FOR WET WEATHER FLOWS JUNE
City of Newark, Ohio HIGH RATE TREATMENT AS PART OF THE SOLUTION FOR WET WEATHER FLOWS JUNE 22, 2011 High Rate Treatment Tanks/UV Wet Weather Screen Building JC2/Wet Weather Pump Station Wet Weather Control
More informationCEDAR CREEK Wastewater Treatment Facility
CEDAR CREEK Wastewater Treatment Facility Where does the waste originate Private homes Businesses from? Condominium complexes Nursing homes Apartments ANY DWELING THAT USES WATER AND IS CONNECTED TO THE
More informationBaltimore City Department of Public Works
Baltimore City Department of Public Works Back River WWTP Process and Construction Overview Michael F. Gallagher, Chief Wastewater Facilities Division Wastewater Treatment Chesapeake Bay Restoration Water
More informationBEING 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 informationNorth Side WRP Master Plan Research and Development Department 2006 Seminar Series October 27, 2006 Metropolitan Water Reclamation District of
North Side WRP Master Plan Research and Development Department 2006 Seminar Series October 27, 2006 Metropolitan Water Reclamation District of Greater Chicago Today s Goals Discuss project background Provide
More informationChapter 4: Advanced Wastewater Treatment for Phosphorous Removal
ENGI 9605 Advanced Wastewater Treatment Chapter 4: Advanced Wastewater Treatment for Phosphorous Removal Winter 2011 Faculty of Engineering & Applied Science 4.1 Phosphorous in wastewaters 1. Common forms
More informationCITY OF OXFORD WASTEWATER TREATMENT FACILITY ANNUAL PERFORMANCE REPORT FOR THE CALENDAR YEAR OF 2018
CITY OF OXFORD WASTEWATER TREATMENT FACILITY ANNUAL PERFORMANCE REPORT FOR THE CALENDAR YEAR OF 2018 PREPARED: January 2019 2018 ANNUAL PERFORMANCE REPORT FOR THE CITY OF OXFORD WASTEWATER TREATMENT FICILITY
More informationCOMPARISON OF SBR AND CONTINUOUS FLOW ACTIVATED SLUDGE FOR NUTRIENT REMOVAL
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 03101 ABSTRACT Sequencing
More informationMasses at Massillon: IFAS for Industrial Loads and Nutrient Removal
OWEA Annual Conference, Sandusky, OH, Wednesday, June 24, 3:00-3:45 PM Masses at Massillon: IFAS for Industrial Loads and Nutrient Removal Kristin Waller, O Brien & Gere Kristin.Waller@obg.com #obgpresents
More informationVILLAGE OF ALGONQUIN 2014 WASTEWATER FACILITY PLAN UPDATE EXECUTIVE SUMMARY
EXECUTIVE SUMMARY EXECUTIVE SUMMARY INTRODUCTION AND BACKGROUND The Village of Algonquin, located along the Fox River in McHenry County, provides wastewater collection and treatment services to the entire
More informationChoices 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 informationISAM 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 informationCITY OF OXFORD WASTEWATER TREATMENT FACILITY ANNUAL PERFORMANCE REPORT FOR THE CALENDAR YEAR OF 2014
CITY OF OXFORD WASTEWATER TREATMENT FACILITY ANNUAL PERFORMANCE REPORT FOR THE CALENDAR YEAR OF 2014 PREPARED: January 2015 2014 ANNUAL PERFORMANCE REPORT FOR THE CITY OF OXFORD WASTEWATER TREATMENT FICILITY
More informationAquaSBR. Sequencing Batch Reactor Process
AquaSBR Sequencing Batch Reactor Process Presentation Outline What is the AquaSBR? Five Phases of the AquaSBR Cycle Structure Applications Summary What is AquaSBR? Sequencing Batch Reactor (SBR) Activated
More informationAltoona Westerly Wastewater Treatment Facility BNR Conversion with Wet Weather Accommodation
Pennsylvania Water Environment Federation PennTEC Annual Technical Conference June 4, 2013 Altoona Westerly Wastewater Treatment Facility BNR Conversion with Wet Weather Accommodation Presented by: Jim
More informationSanitary Sewer Systems. Sewage Collection System. Types of Sewage 10/12/2016. General Overview
Sanitary Sewer Systems General Overview Sewage Collection System Pipes Pumping stations Maintenance entry points manholes Types of Sewage Sanitary Domestic sewage: human wastes and washwater from public
More informationTHE COMAG SYSTEM FOR ENHANCED PRIMARY AND TERTIARY TREATMENT
2.2 MGD TERTIARY CLARIFIER USING THE COMAG SYSTEM THE COMAG SYSTEM FOR ENHANCED PRIMARY AND TERTIARY TREATMENT SETTLES FLOC UP TO 30 TIMES FASTER THAN CONVENTIONAL TREATMENTS WHILE EXTENDING EQUIPMENT
More informationWastewater treatment objecives
Wastewater treatment objecives Removal of suspended and floatable materials Degradation of biodegradable organics Removal of nutrients Elimination of priority pollutants Elimination of pathogenic organisms
More informationCASE STUDY: ROYAL AUSTRALIAN AIR FORCE BASE, AMBERLEY SEWAGE TREATMENT PLANT
2007 Virotec International plc All rights reserved. A COMMERCIAL APPLICATION OF VIROSEWAGE TECHNOLOGY CASE STUDY: ROYAL AUSTRALIAN AIR FORCE BASE, AMBERLEY SEWAGE TREATMENT PLANT The ViroSewage Technology
More informationW 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 informationPhysical water/wastewater treatment processes
Physical water/wastewater treatment processes Tentative schedule (I) Week 1: Introduction Week 2: Overview of water/wastewater treatment processes Week 3: Major contaminants (Chemicals and pathogens) Week
More informationLEMNA BIOLOGICAL TREATMENT PROCESS LEMTEC TM TECHNOLOGIES, INC.
LEMNA TECHNOLOGIES, INC. I n n o v a t i v e W a s t e w a t e r T r e a t m e n t S o l u t i o n s LEMTEC TM BIOLOGICAL TREATMENT PROCESS LEMNA For more than 20 years, Lemna has been the world leader
More informationDrinking Water Supply and
Drinking Water Supply and Health Engineered Water Systems Water and Health 80% of sickness in the world is caused by inadequate water supply or sanitation 40% of the world population does not have access
More informationDISCUSSION PAPER. 1 Objective. 2 Design Flows and Loads. Capital Regional District Core Area Wastewater Management Program
DISCUSSION PAPER Capital Regional District Core Area Wastewater Management Program Macaulay/McLoughlin Point Wastewater Treatment Plant Discussion Paper Liquid Process Alternatives Evaluation 034-DP-1
More informationProprietary AquaTron technology incorporates three (3) innovative features that increase its efficiency and reduces cost:
THE AQUATRON The Technology The AquaTron is the result of over twenty years of research, development, testing and practical experience. Using the principles of the activated sludge biological process,
More informationNC-PC Industry Day Pretreatment 101. Industrial Waste Impacts on POTW Treatment Processes. Dawn Padgett Operations Manager Charlotte Water
NC-PC Industry Day Pretreatment 101 Industrial Waste Impacts on POTW Treatment Processes Dawn Padgett Operations Manager Charlotte Water NC-PC Industry Day Definitions BOD Amount of oxygen consumed by
More informationA NEW METHOD FOR EVALUATING PRIMARY CLARIFIERS Alex Ekster and Cristina Pena San Jose/Santa Clara Water Pollution Control Plant City of San Jose
A NEW METHOD FOR EVALUATING PRIMARY CLARIFIERS Alex Ekster and Cristina Pena San Jose/Santa Clara Water Pollution Control Plant City of San Jose ABSTRACT A new method has been developed for evaluating
More informationA STRUVITE CONTROL AND PHOSPHORUS REMOVAL PROCESS FOR CENTRATE: FULL-SCALE TESTING. 850 Pembina Highway Winnipeg, MB
A STRUVITE CONTROL AND PHOSPHORUS REMOVAL PROCESS FOR CENTRATE: FULL-SCALE TESTING Simon Baker 1, Yoomin Lee 1, Wang Li 1 1 Earth Tech Canada Inc 850 Pembina Highway Winnipeg, MB ABSTRACT The North End
More informationWATER AND WASTEWATER FACILITY CLASSIFICATION APPLICATION FORM
WATER AND WASTEWATER FACILITY CLASSIFICATION APPLICATION FORM APPLICATION INSTRUCTIONS Please print or type. In keeping with the privacy provisions of the Nova Scotia Freedom of Information & Protection
More informationFacilities Plan. Technical Memorandum No. TM-CSO-10 Wet Weather Treatment Facilities
City of St. Joseph, Missouri By Work Order No. 09-001 B&V Project 163509 November 17, 2009 Table of Contents 1.0 Executive Summary...1 2.0 Purpose of Study...7 3.0 Background and Related Studies...8 4.0
More informationTHE ROLE OF ACTIVATED SLUDGE SOLIDS IN AN ACTIFLO SYSTEM. Chen-An Lien and Andrew P. Kruzic
THE ROLE OF ACTIVATED SLUDGE SOLIDS IN AN ACTIFLO SYSTEM Chen-An Lien and Andrew P. Kruzic ABSTRACT Civil and Environmental Engineering Department, University of Texas at Arlington Arlington, Texas 76011,
More informationWASTEWATER DEPARTMENT. Bentonville Wastewater Treatment Plant Facts:
Mission: The mission of the Bentonville Wastewater Treatment Utility and staff is to protect public health and the environment through the effective treatment of wastewater. Effective wastewater treatment
More informationEfficient Design Configurations for Biological Nutrient Removal
Efficient Design Configurations for Biological Nutrient Removal A Case Study: Upper Blackstone Water Pollution Abatement District Jane E. Madden, P.E., BCEE August 30, 2017 UBWPAD Wastewater Treatment
More informationPLANNING FOR NUTRIENT REMOVAL: WHAT STEPS CAN WE BE TAKING NOW?
PLANNING FOR NUTRIENT REMOVAL: WHAT STEPS CAN WE BE TAKING NOW? LEONARD E. RIPLEY, PH.D., P.E., BCEE SENIOR PROCESS ENGINEER FREESE AND NICHOLS, INC. General Action Categories 1. Collect wastewater characterization
More informationChapter 2: Description of Treatment Facilities
2020 Facilities Plan Treatment Report 2.1 Introduction Chapter 2: Description of Treatment Facilities This chapter defines the Milwaukee Metropolitan Sewerage District (MMSD) service area. It also describes
More informationCITY OF OXFORD WASTEWATER TREATMENT FACILITY ANNUAL PERFORMANCE REPORT FOR THE CALENDAR YEAR OF 2012
CITY OF OXFORD WASTEWATER TREATMENT FACILITY ANNUAL PERFORMANCE REPORT FOR THE CALENDAR YEAR OF 2012 PREPARED: January 2013 2012 ANNUAL PERFORMANCE REPORT FOR THE CITY OF OXFORD WASTEWATER TREATMENT FICILITY
More informationPrepared by the Operation of Municipal Wastewater Treatment Plants Task Force of the Water Environment Federation
Operation of Municipal Wastewater Treatment Plants WEF Manual of Practice No. 11 Chapter 24 Physical Chemical Treatment Sixth Edition Prepared by the Operation of Municipal Wastewater Treatment Plants
More informationEvaluation 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 informationModule 17: The Activated Sludge Process - Part III Answer Key
Module 17: The Activated Sludge Process - Part III Answer Key What other differences can you see between Complete Mix and Step Aeration? One of the features that make Complete Mix Aeration different from
More informationWASTEWATER 101 Fo r MOWA
WASTEWATER 101 For MOWA iochemical xygen emand BOD Reactions BOD 5 = 0.68 BOD u Lu Carbonaceous BOD BOD 5 Time, Days BOD w/ Nitrification Oxygen Used for Nitrificationifi ti BOD Point Nitrification Begins
More informationChapter 5: Treatment Assessment Future Condition
2020 Facilities Plan Treatment Report 5.1 Introduction Chapter 5: Treatment Assessment Future Condition The future performance of the Milwaukee Metropolitan Sewerage District (MMSD) wastewater treatment
More informationLiquid Waste Management Plan Technical Memorandum
Liquid Waste Management Plan Technical Memorandum LWMP Technical Memorandum #7A TO: SUBJECT: Wastewater Advisory Committee Treatment Options DATE: November 1, 2017 Prepared By: Reviewed By: Troy Vassos
More informationNEWEA 2015 Annual Conference Session 16
NEWEA 2015 Annual Conference Session 16 Meeting North Attleborough, MA s 0.1 mg/l Phosphorus Limit with Bio-P and Cloth Media Filters January 27, 2015 Sue Guswa, P.E., Tighe & Bond Merrill Hastings, Town
More informationThickening and Dewatering Optimization Matt Van Horne, PE Hazen and Sawyer July 14, 2016
Thickening and Dewatering Optimization Matt Van Horne, PE Hazen and Sawyer July 14, 2016 Agenda Equipment Specific Modifications Chemicals Feeding Cleaning and Maintenance Pretreatment 2 1 Optimization
More informationWastewater Treatment Works and Collections System Annual Report Year 2005 General Information
Wastewater Treatment Works and Collections System Annual Report Year 2005 General Information Facility / System: Town of Farmville Wastewater Collection System and Treatment Facilities Responsible Entity:
More informationWastewater Treatment clarifier
Wastewater Treatment Pretreatment During pretreatment, items would normally be removed that would hinder the further processes of treatment. Items commonly removed include roots, rags, cans, or other large
More informationUDWQ POTW Nutrient Removal Cost Impact Study: Analysis of Tremonton City Wastewater Treatment Plant
TECHNICAL MEMORANDUM UDWQ POTW Nutrient Removal Cost Impact Study: Analysis of Tremonton City Wastewater Treatment Plant PREPARED FOR: PREPARED BY: COPIES: Utah Division of Water Quality CH2M HILL DATE:
More informationRare Earth Technology for Low-Level Phosphorus Removal and Enhanced Sludge Properties
Rare Earth Technology for Low-Level Phosphorus Removal and Enhanced Sludge Properties July 4, 2017 The Big Phosphorus Conference and Exhibition Alan Weber Neo Performance Materials 1 Presentation Summary
More informationThe Use of Magnesium Hydroxide Slurry as a Safe and Cost Effective Solution for H 2 S Odor, Corrosion, and FOG in Sanitary Sewer Systems
The Use of Magnesium Hydroxide Slurry as a Safe and Cost Effective Solution for H 2 S Odor, Corrosion, and FOG in Sanitary Sewer Systems Aileen Gibson, Product Development Manager, Martin Marietta Magnesia
More informationWaste Water Treatment Plant Overview and Tour
Waste Water Treatment Plant Overview and Tour Outline Definitions Chronology BNR Process Description Plant Performance Site Photos Definitions SWPCC: Summerside Water Pollution Control Centre Activated
More informationConceptual Design for a Future Wastewater Treatment Plant
Wastewater Master Plan DWSD Project No. CS-1314 Conceptual Design for a Future Wastewater Treatment Plant Technical Memorandum Original Date: April 1, 2003 Revision Date: September 2003 Author: CDM Table
More informationIndustrial Waste Water Treatment. Unit 5
Industrial Waste Water Treatment Unit 5 Outline Levels of treatment methods 1 Biological wastewater treatment Caste study Heavy metals Biological wastewater treatment Treatment Methods employed Biological
More informationBIOLOGICAL WASTEWATER BASICS
BIOLOGICAL WASTEWATER BASICS PRESENTATION GOALS EXPLAIN DIFFERENT TYPES OF WASTEWATER EXPLAIN THE DIFFERENT BIOLOGICAL SYSTEMS AND HOW THEY FUNCTION. COMPARE AND CONTRAST AEROBIC AND ANAEROBIC SYSTEMS
More informationOperation and Control of Multiple BNR Processes in One WWTP
Operation and Control of Multiple BNR Processes in One WWTP CENTRAL PLANT Williamsport Sanitary Authority s Chesapeake Bay and CSO Compliance Program Presented by: Phil Anderson 1 June 24, 2015 Purpose
More informationDepartment of Environmental Quality
EARL WUESTNICK Wastewater Specialist Bruce Lack Certification Specialist Department of Environmental Quality Operator Training and Certification Unit OPERATOR TRAINING AND CERTIFICATION UNIT For More Information
More informationPHYSICOCHEMICAL TREATMENT OF DAIRY PLANT WASTEWATER USING FERROUS SULFATE AND FERRIC CHLORIDE COAGULANTS
International Journal of Basic and Applied Chemical Sciences ISSN: 2277-273 (Online) PHYSICOCHEMICAL TREATMENT OF DAIRY PLANT WASTEWATER USING FERROUS SULFATE AND FERRIC CHLORIDE COAGULANTS *Yogesh M.
More informationMid-Halton Wastewater (Sewage) Treatment Plant Expansion And Effluent Sewer Public Information Centre # 1 May 14, 2009
INFORMATION BRIEF MID-HALTON WASTEWATER (SEWAGE) TREATMENT PLANT EXPANSION AND EFFLUENT SEWER SCHEDULE C CLASS ENVIRONMENTAL ASSESSMENT PUBLIC INFORMATION CENTRE (PIC) # 1 1 Municipal Class Environmental
More informationGeorgia Power Plant McDonough-Atkinson NPDES Permit No. GA Ash Pond Dewatering Plan. Revised May 2018
Georgia Power Plant McDonough-Atkinson NPDES Permit No. GA0001431 Revised May 2018 Purpose This updated (Plan) describes the additional procedures, safeguards and enhanced wastewater treatment measures
More informationFacilities Plan. Technical Memorandum No. TM-WW-7 Hydraulic Analysis and Effluent Pump Station
City of St. Joseph, Missouri Hydraulic Analysis and Effluent Pump Station By Work Order No. 09-001 B&V Project 163509 May 20, 2010 Table of Contents 1.0 Executive Summary...1 2.0 Purpose of Study...2 3.0
More informationWASTEWATER TREATMENT PLANT MASTER PLAN 3. EXISTING FACILITIES AND PERFORMANCE ASSESSMENT
WASTEWATER TREATMENT PLANT MASTER PLAN 3. EXISTING FACILITIES AND PERFORMANCE ASSESSMENT This chapter reviews in detail the current condition of the individual components of the Napa Sanitation District
More information