Environmental Dynamics International

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3 Corporate Profile Capabilities (EDI) specializes in the research, development, and application of advanced technology aeration and biological treatment solutions for municipal and industrial wastewater treatment. The company s value solutions support new plant construction, existing facility upgrades, and long term infrastructure demands. EDI supports a staff of qualified professionals and engineers to provide the highest level of value added service, technology development, process application, and system design support. EDI also offers field services for equipment installation and maintenance through the AW Division, with demonstrated success in over 7,000 installations in over 100 countries across all 7 continents. Global Activities The corporate office in Columbia, MO is the technology and manufacturing center for the organization. The facility supports research and development, the engineering functions of the organization and features world-class test facilities for oxygen transfer, material performance, and product design. EDI serves the global market through direct sales and local independent partners. In addition to sales support from the corporate offices, EDI maintains international offices in Japan, China, India, Mexico, United Kingdom, Germany, and Singapore. The UK, China, and India locations include warehousing and manufacturing to better support the needs of the surrounding region. EDI maintains an extensive network of representatives covering each major market to provide the highest level of support to our customers as listed on the website continued on back...

4 Corporate Profile continued Industry Excellence EDI is recognized for excellence in exports and has received numerous awards including: State of Missouri Small Business Exporter of the Year Award in 2001, and US Dept. of Commerce President s E Award for Excellence in 2002 followed by the E-Star Award in The E-Star Award has been granted to approximately 300 select companies since the inception of the program by President John F. Kennedy in EDI was also recognized on the Inc 5000 fastest growing privately held companies in the US for both 2008 & 2009, Environmental Business Journal Award winner for International Expansion in 2009, and SBA Top 100 Award recipient in Global Headquarters 5601 Paris Road Columbia MO USA

5 IDEAL Energy Savings Aeration represents the largest use of energy at wastewater treatment plants. The IDEAL Lagoon Solution provides excellent water quality and energy savings throughout the life of the plant. The IDEAL Bioreactor converts ammonia to nitrate at the front of the lagoon. Systems that nitrify at the end of the process miss the opportunity for significant energy savings. The IDEAL Bioreactor uses the nitrate in place of diffused oxygen during low DO conditions and non-aerated phases of the process. The IDEAL Bioreactor delivers nitrate and total nitrogen removal, which translates to a energy reduction of 30%. Select the IDEAL Solution for your plant to deliver high quality effluent and low energy consumption! 61114

6 IDEAL Benefits Front-of-Plant Ammonia Removal Removing ammonia at the front of the plant provides several benefits. Other processes look to the back of the plant for ammonia removal where BOD concentration is lowest. The IDEAL Process removes BOD and ammonia up front where warm, carbon-rich influent water is available to increase biological activity and denitrify for easy recovery of oxygen and alkalinity. Nitrate and Total Nitrogen Removal Total nitrogen and nitrate restrictions are on the horizon. Converting ammonia to nitrate is only the first step. Denitrification, or removing nitrate, is the second step necessary for total nitrogen removal. The IDEAL Process provides this benefit as a natural function of the process, whereas many other systems require expensive upgrades to achieve similar results. Long-Term Compliance Planning Upgrades for advanced system control and maximum pollutant removal are made simple. No modification to the core treatment process is necessary for expansion of performance. Energy and Chemical Savings Microbes use nitrate in the same way they use oxygen. Denitrification that occurs naturally in the IDEAL process reduces oxygen requirements and provides decreased operational energy cost. The alkalinity recovered during denitrification can decrease or eliminate the need for chemical addition that is needed in some plants so complete nitrification can occur. Worry-Free Operation During and After Peak-Plus Flow Events The IDEAL Process has shown an excellent ability to maintain performance during and after heavy water surges. The IDEAL Process also adjusts easily to varying degrees of organic loading. Minimum Operator Attention The IDEAL Process offers simple operation with operator commitment similar to traditional aerated lagoons. continued on back...

7 IDEAL Features EDI Aeration System The IDEAL Bioreactor has the advantage of being outfitted with EDI s high-efficiency fine bubble FlexAir diffusers. The aeration technology applied to the IDEAL combines an operator-centric focus with almost four decades of advancement. EDI heavy-duty floating laterals or fixed grid piping stand up to any environmental condition and allow easy access, even if the cell is covered. EDI diffusers provide the optimum combination of aeration efficiency and mixing performance that are crucial in a lagoon environment. BioReef BioCurtain EDI s patented BioReef BioCurtain incorporates multiple chains of BioReef that act as a biologically activated hydraulic curtain. The BioCurtain incorporates fixed-film technology to increase biomass in the reactor, provide contact stabilization during the settling and decant phases, and acts as a hydraulic buffer to address short-circuiting potential within the reactor. Decanter EDI-engineered decanters control effluent flow from the IDEAL Bioreactor. The decanter reduces moving parts and reduces operator involvement. The IDEAL decanter is engineered to minimize head loss between the IDEAL and partial mix lagoon; a crucial feature when upgrading an existing lagoon system. Process Controls EDI provides multiple control package choices to meet the needs of the owner and operator. The basic package uses analog timers for affordable reliability. The next step up in the control package incorporates the same functions as the analog control package but is PLC-based. The PLC option allows for easy future upgrade to blower control based on dissolved oxygen concentration, along with other data acquisition and reporting needs, to provide maximum energy efficiency and total nitrogen removal. All process control options incorporate storm mode. This mode of operation initiates during extremely high flow events to eliminate the potential of reactor washout. The IDEAL Bioreactor automatically resumes normal sequencing once flow decreases

8 Case Study: City of Miner, MO EDI Lagoon Solutions Help Missouri Wastewater Treatment Plant Improve Discharge Quality START-UP DATE: 2012 DIRTY DISCHARGE Miner, MO., population 980, is a quaint rural community located halfway between St. Louis and Memphis, TN. The 20-year-old Miner Wastewater Treatment Plant faced a number of technical issues in The town s old three-cell MGD aerated lagoon had high levels of suspended solids. Its ammonia and nitrogen concentrations were above their targets. There was quite a bit wrong with the plant, said chief operator Marvin Hatton. Miner needed to clean up its discharge to comply with Missouri Department of Natural Resources (DNR) and U.S.Environmental Protection Agency (EPA) regulations. The plant s staff and City of Miner Engineer Norman Lambert decided it was time for a fullservice upgrade. They called in (EDI) to assess the issues and develop a rehabilitation plan. They decided a brand new plant should replace the old one. It would have been just as cheap to have a new plant put in than to have it cleaned out and put back in service, Hatton said. To be honest, it was just time to update. DOWNSIZING TO UPGRADE Lambert selected EDI to design and implement a new lagoon treatment plant for Miner. EDI proposed an Intermittently Decanted Extended Aeration Lagoon, or IDEAL. The solution focused on eliminating solids, oxygen demand and ammonia in Miner s wastewater. The IDEAL is able to provide full nitrification while removing a majority of total nitrogen through denitrification. The overall IDEAL Process uses two ponds; the IDEAL for advanced treatment followed by a partial mix basin with a settling zone for sludge storage and solids separation, thereby shrinking the size of Miner s plant while improving its efficiency and effectiveness. The IDEAL aerates influent for two hours for BOD removal and nitrification before entering an anoxic settling and decant phase (one hour each), which provides denitrification, retains biomass, and discharges clear water. Supernatant and stabilized waste sludge are partially mixed in the second pond to maintain a positive level of dissolved oxygen to digest solids and prevent ammonia rebound. A small portion of the secondary pond is a dedicated quiescent zone where solids that are not trapped in the partial mix zone settle; allowing clear water to flow out of the pond and to UV disinfection. Finally, the treated wastewater is discharged into the North Cut Ditch. MAJOR IMPROVEMENTS When construction for the IDEAL Process was fully completed in November 2012, Hatton said EDI representatives spent a week training his staff on the new equipment and processes. A joint effort between the City of Miner and EDI tracked the plant s effectiveness during the record-cold winter of 2013/2014. Hatton and his staff gathered composite samples from the influent and effluent of the plant twice a week, while monitoring temperature in the IDEAL. Those samples were sent to Environmental Analysis South in Jackson, Mo., where the level of total suspended solids, ammonia, BOD, nitrate, nitrite, and total nitrogen were tested. Consistently, analysis of incoming and outgoing nutrient continued on back...

9 Case Study: City of Miner continued Major Improvements continued removal has been very positive. Ammonia levels, for example, have averaged 27 mg/l in wastewater entering the plant and drop to less than 0.05 mg/l by discharge; not one sample has come in above the method detection limit of the analysis, even when the temperature in the IDEAL dropped below 3 C. Similarly, BOD drops 230 mg/l to 4.5 mg/l and suspended solids fall 104 mg/l to 5.3. Total nitrogen drops 66% from 32 mg/l to 11 mg/l. Hatton said a site visit from Missouri DNR state officials where samples were taken and tested also yielded enthusiastic feedback. He credited the improved water quality to the more effective and efficient process of the IDEAL. Installing the IDEAL brought Miner s wastewater treatment plant well within DNR regulatory requirements. ONGOING PARTNERSHIP Hatton said the IDEAL was easy to install and is low-maintenance with highly favorable outcomes. However, to garner further maintenance support with its new water treatment system, Miner is entertaining a maintenance contract agreement with EDI. The city of Miner Board of Aldermen will vote on the proposal to provide the Miner Wastewater Treatment Plant additional maintenance assistance from EDI. Should Miner and EDI develop a maintenance agreement to ensure sustained success of the IDEAL solution, Hatton said he would welcome occasional EDI service visits. Miner, MO 2013 Winter Performance Evaluation Design Average Flow 0.3 MGD Design Average BOD 270 mg/l Design Peak Flow 1.2 MGD Design Average TSS 220 mg/l Current Average Flow 0.24 MGD Design Average TKN 35 mg/l Storm Flow up to 3 MGD IDEAL Temp ( C) 5.5 avg MLSS (mg/l) /- 300 F:M Ratio Parameter Influent (mg/l) Effluent (mg/l) BOD 230 +/ /- 1.0 TSS 100 +/ /- 1.7 Ammonia-N 27 +/ /- 0 Nitrate-N / /- 1.7 Nitrite-N / / Total Nitrogen 32 +/ /- 3 Note I: Error calculated using Student s T with 98% confidence interval Note II: Effluent Ammonia-N consistently below method detection limit of 0.05 mg/l Plant designed by: Lambert Engineering, Sikeston,MO 61114

10 Case Study: City of Grantsville, UT Utah Wastewater Facility Meets Discharge Requirements with EDI Aeration System START-UP DATE: 2010 Discharge Dilemma Originally designed for a 0.75 MGD capacity, the Grantsville Wastewater Treatment Plant receives residential wastewater from almost 10,000 residents in Grantsville, Utah, just west of Salt Lake City. In 2009, the plant was having significant trouble meeting the city s discharge requirements for ammonia, TSS, and BOD. According to Ron Griffin, the plant s operator, treated wastewater would violate discharge requirements so regularly that he had to withhold it six months out of the year to limit violations. Something within every six months was a problem either our ammonia or our BOD, Griffin said. So, I was only discharging six months out of the year. I would discharge for three months, hold for three months, discharge for three and then hold for three. Identifying the Cause The cause of the problem could be traced to a surface aerator in the plant s primary treatment pond. The aerator created an aerobic zone in the top 4-ft or 5-ft of the pond and maintained an anaerobic zone throughout the rest of the 10-ft column. According to Griffin, the anaerobic process was slow and sluggish, and the by-products (hydrogen sulfide and methane) caused odor. The plant needed a more efficient system that would allow a continuous discharge of treated effluent and have the capacity to meet future requirements for ammonia removal. The plant had two options: convert existing non-aerated ponds to aeration, or construct new ponds that met state requirements. Selecting a Solution For Griffin, there was one obvious answer: It was much more cost-effective to use our existing footprint and ponds and just add the [aerators]. Upon further evaluation, (EDI) proposed using an Intermittently Decanted Extended Aeration Lagoon, or IDEAL. IDEAL is a lagoon-based extended aeration system that treats raw wastewater using a batch reactor process. The IDEAL Process allows continuous inflow of raw wastewater, which then undergoes a sequenced aeration reaction/mixing phase, followed by a settling phase. Finally, the water is decanted and discharged to polishing ponds. After removing the existing surface aerator from the primary pond, construction workers installed the IDEAL. Equipment required for the upgrade included EDI s floating lateral aeration system with FlexAir 88S assemblies paired with Magnum TM fine bubble diffusers, a BioReef BioCurtain, and four 24-inch diameter decant pipes with electric actuated valves, system control panel, and three 220HP turbo blowers. During construction, workers were met with a significant challenge: a 4-ft sludge blanket in the bottom of the cells. We had to pull about 30 different blocks that held the old surface aerators in place, and they had to be eliminated so we could put in these deep, fine bubble diffusers. continued on back...

11 Case Study: City of Grantsville continued Improved Treatment Process The system went online in July With the new treatment process, wastewater comes in through the head works to remove all of the large particles. It goes to the primary cell, comprised of the IDEAL. The system has big air pumps that [aerate] from the very bottom of the pond, so it turns the entire 10-ft of the elevation into an aerobic zone, Griffin said. The aerobic treatment process is much more aggressive and robust. Since air is applied at the bottom of the lagoon, instead of top-down, it s a more efficient process. Because the by-products are carbon dioxide and water vapor, it eliminates odor. After this process, the water is decanted from the first cell, traveling through two partially mixed cells and one quiescent cell. It is disinfected with a UV light before discharge. The water is then discharged into Blue Lakes a small wildlife area north of the plant and is mostly used for irrigation of pasture. Quality Results The system upgrade has resulted in increased plant capacity, now 1.5 MGD, and the quality of the effluent has drastically improved. With the upgrade, the ammonia went down to less than 1 mg/l and non detect on the BOD. I m literally getting a non detect on my report about 80% of the time on my BOD, TSS and ammonia, and even E. coli. It s made a real fine quality of water, Griffin said. Treatment Achieved by the IDEAL Solution Influent Effluent Date Monthly Average Flow (MGD) BOD (mg/l) TSS (mg/l) Ammonia-N (mg/l) BOD* (mg/l) TSS* (mg/l) Ammonia-N* (mg/l) 10/13/ /21/ /17/ /23/ /1/ /14/ /5/ * = Not detected at the corresponding minimum limit: BOD < 5 mg/l, TSS < 4 mg/l, Ammonia-N < 0.4 mg/l

12 Easy Answers to Hard Questions Intermittently Decanted Extended Aeration Lagoon (IDEAL ) What is IDEAL? IDEAL stands for Intermittently Decanted Extended Aeration Lagoon that delivers advanced treatment and nutrient removal in an earthen basin. The IDEAL Bioreactor is able to accomplish this performance by combining long sludge age with a batch process and incorporating attached growth media. The IDEAL Process is the IDEAL Bioreactor in combination with a partial mix pond and quiescent zone for hassle-free solids separation and storage. Several other configurations are available to meet site-specific and/or effluent quality criteria What are the benefits of combining an extended aeration design with a batch process? Extended aeration designs deliver high ammonia treatment performance, process stability, and low sludge yield. Batch processes eliminate the need for sludge recycle and additional infrastructure requirements. By combining the two and focusing on treatment at the front of the plant, the IDEAL Bioreactor is able to provide nitrate and total nitrogen removal with enough capacity to handle highly variable flows. What are the benefits of combining attached and suspended biomass? Suspended biomass is known for providing robust treatment under variable loading conditions. Attached growth biomass has the ability to nitrify under very cold conditions. The combination raises the overall biomass concentration in the reactor and provides sustained high levels of treatment under highly variable or extreme process conditions. How does the IDEAL Bioreactor differ from a conventional SBR? The patented IDEAL is a hybrid extended aeration/batch process that accepts constant influent but has a batch release of effluent. The IDEAL uses a prolonged SRT and low F:M ratio that is not normally cost effective in conventional SBR, and the simple, balanced solids management protocols provided with the IDEAL Process minimizes solids management. IDEAL also incorporates the patented BioReef BioCurtain as a biologically active hydraulic buffer that addresses shortcircuiting potential, provides contact stabilization during settling and decant cycles, and increases biomass in the reactor. How is sludge wasted from the IDEAL Bioreactor? Installations are typically designed to operate as a balanced biological system. Excess sludge is wasted on an assumed basis. The SRT is well above the critical growth rate of nitrifiers, generally measured in hundreds of days. How is sludge managed in the IDEAL Process? Waste solids discharged from the IDEAL Bioreactor are highly stabilized and exert minimal oxygen demand and nutrient rebound potential. Waste solids are stored and undergo additional aerobic digestion in either a seperate sludge storage pond or the downstream partial mix lagoon. This aspect of the IDEAL Process is no different than a traditional aerated lagoon system, except that the solids that leave the IDEAL are more stabilized. How does the IDEAL Bioreactor manage peak flows and storm surges? The IDEAL is designed to accommodate hourly peak flows during each and every cycle. The configuration of the primary reactor is sized to handle most storm and surge flows without any change in the process. The IDEAL includes a storm cycle for peaks that exceed the design capacity for the plant. If the water in the IDEAL reaches a critical level, an alarm is triggered, the blowers shut off, and the sludge is allowed to settle. This allows storm water to pass through the settled sludge blanket and first BioCurtain for contact treatment, and then over the sludge blanket and second BioCurtain to eliminate washout of the reactor. The storm cycle ends once the water level drops and aeration will reset accordingly. continued on back...

13 Easy Answers to Hard Questions continued What is used to control the IDEAL Bioreactor? A number of control configurations are available depending on the needs of the client. The standard options include: -- Analog controls with visual and audible alarms; includes storm cycle -- Digital controls with visual and audible alarms; includes storm cycle -- Digital controls with visual and audible alarms; includes storm cycle and DO control for energy efficiency and maximum nitrate and total nitrogen removal - The digital control packages are available with online monitoring or online monitoring and control Does the IDEAL Bioreactor remove ammonia? Even in the winter? The IDEAL has demonstrated the ability to remove ammonia to less than 0.05 mg/l even when the water in the IDEAL was below 3 C! The IDEAL may be thermally insulated to minimize reactor cooling if extremely low temperatures are anticipated. Will EDI guarantee winter ammonia removal? Yes, a full guarantee is provided based on proper review of project conditions, system design options, and operational variables. How much maintenance is necessary with the IDEAL Process? No regular operator input is needed for process performance. It relies on similar hardware and operational requirements as a typical CM/PM lagoon system. Regular equipment checks and monitoring are recommended as with any process. What sort of product training and support does EDI offer on the IDEAL Process? Every IDEAL comes with onsite operator training during start-up and a biannual system tune-up program for the first two years of operation. In addition, EDI s Aeration Works provides long-term maintenance contracts and extended warranties to meet the needs of clients. What happens if additional effluent criteria are enacted, such as total nitrogen or phosphorous? The IDEAL Process represents no lost investment if effluent criteria become more stringent. The IDEAL is easily adjusted to increase initial total nitrogen removal up to 80% or more by managing blower function according to DO concentration. Phosphorous and particulates affecting BOD, TSS, organic nitrogen, etc. can be addressed by adding coagulant and/or downstream filtration. Bottom line: there are easy add-ons available that do not require modifying the core treatment process