NUTRIENT REMOVAL CASE STUDIES & WHITE PAPERS

Meet Stringent Phosphorus Limits Under A Wide Range Of Conditions With The CoMag System
Meet Stringent Phosphorus Limits Under A Wide Range Of Conditions With The CoMag System

The Village of Waterbury Wastewater Treatment Plant (WWTP) is located on the Winooski River floodplain, which poses challenges from significant flooding during the spring runoff and storm seasons to strong algal blooms in late spring.

  • Plant Boasts The First In-Line Fermenter In The Country
    Plant Boasts The First In-Line Fermenter In The Country

    Several years ago, the Environmental Protection Agency (EPA) began an initiative in the Mississippi River basin to control excess amounts of nitrogen and phosphorus pollution entering the Gulf of Mexico through watersheds and point sources such as municipal wastewater treatment plants.

  • Utility Transformation — From WWTP To Reuse Facility
    Utility Transformation — From WWTP To Reuse Facility

    Facing state Department of Environmental Quality mandates, an Arizona wastewater treatment plant (WWTP) took on a large-scale expansion project and effluent-quality upgrade to become a state-of-the-art water reclamation facility.

  • Envirex® Energy Efficient Activated Sludge Process Meets Stringent Regulations While Minimizing Costs
    Envirex® Energy Efficient Activated Sludge Process Meets Stringent Regulations While Minimizing Costs

    The Town of Elkton, Maryland, located in Cecil County near the head of the Chesapeake Bay, has a population of approximately 15,000 and an average elevation of 9.1 m (30 ft). Elkton is an economically strong, stable community that is very conscientious about environmental issues. In an effort to protect the Chesapeake Bay aquatic life, new stringent wastewater effluent regulations were implemented requiring very low nutrient levels in wastewater treatment plant discharge.

  • The Benefits Of Reusing Wastewater
    The Benefits Of Reusing Wastewater

    Since water is an essential element in food or beverage operations, reusing it can reduce a business’s water usage ratios, help meet sustainability goals, lower supply risk and contribute to cost savings, making it a top priority for many companies today.

  • Headworks Bio Commissions First IFAS System In Costa Rica
    Headworks Bio Commissions First IFAS System In Costa Rica

    In late 2013, Headworks Bio Inc. was awarded a contract with General Contractor Soluciones Tecnicas Ambientales, S.A. (SOLAMSA) to supply an IFAS system to upgrade the existing Ptar El Roble conventional activated sludge (CAS) treatment facility in Puntarenas, Costa Rica — the first IFAS installation in the country.

  • Sturbridge POTW: Greater Capacity For High Flow Events, Enhanced Clarification For New Regulations
    Sturbridge POTW: Greater Capacity For High Flow Events, Enhanced Clarification For New Regulations

    Sturbridge, Massachusetts historically suffered from periodic blooms of filamentous bacteria that caused bulking in the secondary clarifiers of their three activated sludge package plants.

  • Concord, Massachusetts WWTP - A Low-Cost, 20-Year Solution To Ever-Tightening Phosphorus Limits
    Concord, Massachusetts WWTP - A Low-Cost, 20-Year Solution To Ever-Tightening Phosphorus Limits

    Prior to 2007, Concord, Massachusetts wastewater treatment plant operated under a NPDES permit that allowed a seasonal phosphorus limit of 0.7 mg/L. But with the issuance of a new five-year permit with a phosphorus limit of 0.2 mg/L and the probability that future limits could reach as low as 0.05 mg/L, Concord needed a treatment solution that would be reliable and cost-effective today and over the long term.

  • Sustainable Nutrient Removal With IFAS
    Sustainable Nutrient Removal With IFAS

    With the AnoxKaldnes Hybas IFAS system, the City of Cocoa Beach, FL, met the challenges of tighter nutrient regulations, site constraints, and operating conditions. And the project met the city’s goals to meet these challenges with a simultaneous decrease in energy use. On top of that, the city did not need to increase operations time or staffing to meet these goals. With the AnoxKaldnes Hybas IFAS system, the city is now meeting stricter nutrient regulations – and doing it sustainably.

  • AnoxKaldnes Hybas™: Meeting New Limits
    AnoxKaldnes Hybas™: Meeting New Limits

    In 2008, AnoxKaldnes Hybas™ designs were completed by Veolia for the upgrade of the Field’s Point Wastewater Treatment Facility to meet new seasonal effluent limits for TN and TIN.

  • A Radical Solution: Lagoon Management Utilizing Natural Biological Processes
    A Radical Solution: Lagoon Management Utilizing Natural Biological Processes

    The city of Davisboro is located in Washington County, Georgia. The 2012 census population was 1,793 at the 2013 census. The population includes Washington State Prison, approximately 1,500 prisoners.

VLR® System For Biological Treatment Case Study
VLR® System For Biological Treatment Case Study

Economic development has its price and sometimes calls for major upgrades to a community’s wastewater treatment facilities.

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NUTRIENT REMOVAL PRODUCTS

TETRA® LP Block™ Dual Parallel Lateral Underdrain TETRA® LP Block™ Dual Parallel Lateral Underdrain

In municipal drinking water applications or pre-treatment for desalination plants using gravity filters, the filter underdrain is one of the most important components contributing to overall system performance and operation — whether a new filter design or retrofitting an existing filter.

TETRA® Modular Deepbed™ Filter Modular Packaged Filtration Plant TETRA® Modular Deepbed™ Filter Modular Packaged Filtration Plant

The TETRA® Modular DeepBed Filter Plant from De Nora Water Technologies is designed as a competitive filtration plant for tertiary effluent from small to medium size sewage works. The Modular DeepBed Filter utilizes the technology of DeepBed filtration that has made the TETRA filter such a successful tertiary treatment process over many years in Europe and the United States.

TETRA® DeepBed™ Tertiary Filtration System TETRA® DeepBed™ Tertiary Filtration System

The TETRA® DeepBed™ tertiary filtration system is an economical solution for the removal of total suspended solids and total phosphorus.

TETRA® Denite® Deepbed™ Denitrification TETRA® Denite® Deepbed™ Denitrification

The TETRA® Denite® system integrates well with other plant treatment processes to provide superior total nitrogen (TN) and phosphorous removal.

True Simultaneous Nitrification-Denitrification Biological Treatment True Simultaneous Nitrification-Denitrification Biological Treatment

The TrueSND™ biological treatment process from Evoqua is a well-established true simultaneous nitrification denitrification technology. The process achieves nutrient and BOD treatment limits using less power in a smaller footprint when compared to more conventional alternatives. It can be applied in both new plants and retrofits, and it can easily resolve high peak and storm flow challenges. Evoqua has over 800 installations and offers three systems that fit specific plant needs and capacities: Orbal® multichannel oxidation ditch systemsVLR® systems and VertiCel® wastewater treatment systems. Evoqua also offers SmartBNR™ process controls, which optimize energy efficiency and plant operation. TrueSND can be applied for nutrient removal (TN and TP limits); BOD removal only (30/30 effluent); new construction; plant retrofits and upgrades; and high peak and storm flows. Evoqua can help create a solution that saves energy and space while meeting required effluent standards.

Magnetite Ballasted Treatment — Simple, Reliable And Proven Magnetite Ballasted Treatment — Simple, Reliable And Proven

The BioMag® and CoMag® Systems from Evoqua infuse magnetite into conventional biological and chemical floc making it heavier and dramatically improving settling. 

DAVCO™ Retrofit and Rehab Services for Biological Wastewater Treatment Plants DAVCO™ Retrofit and Rehab Services for Biological Wastewater Treatment Plants

The Davco™ product line of Evoqua located in Thomasville, GA, offers retrofit, rehab, and replacement parts and services and the installation of water and wastewater filtration, separation, clarification, aeration, biological treatment, and screw pumps. Our retrofit and rehab services save municipal and industrial water and wastewater plants time and budget in addressing worn out, over-extended-in-capacity treatment facilities that are costly to maintain.

The VLR® System for TrueSND™ Biological Treatment The VLR® System for TrueSND™ Biological Treatment

VLR® Systems from Evoqua utilize a vertical loop based design with looped reactors in series that allows DO stratification. As such, it is suited for simultaneous nitrification/denitrification; biological phosphorus removal and storm water treatment..

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NUTRIENT REMOVAL PODCASTS

Primary Filtration Using Cloth Media Filtration Technology Primary Filtration Using Cloth Media Filtration Technology

Since 1969, Aqua-Aerobic Systems, Inc. has been a leader in the design, application and manufacture of wastewater treatment equipment and systems for municipal and industrial markets, worldwide. They are most noted for the Aqua SBR, the sequencing batch reactor, biological process, as well as now our cloth media filters.

Phosphorus Recovery And Revolutionary Algae Phosphorus Recovery And Revolutionary Algae

Phosphorus recovery from wastewater and a newly-developed algae product that doesn’t require photosynthesis are the latest examples of intense product development within Ovivo. In this Water Online radio interview, Jim Porteous, Ovivo’s Vice President and General Manager, explains some of the changes he is seeing in the industry that are fueling the Company’s focus for the future.

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NUTRIENT REMOVAL VIDEOS

Monitoring Nutrient Loading Via Satellite Monitoring Nutrient Loading Via Satellite

Blue Water Satellite uses satellite technology to monitor nutrient loading on land and in water bodies. Blue Water Satellite can compare current and past data to give a far greater picture of land and water body health than previously thought possible.

Science Safeguards Drinking Water From Harmful Algal Blooms

Toxins from harmful algal blooms are increasingly contaminating source waters, as well as the drinking water treatment facilities that source waters supply. EPA researchers are helping the treatment facilities find safe, cost effective ways to remove the toxins and keep your drinking water safe.

Subcommittee Hearing: Cyanotoxins In Drinking Water

On Wednesday, November 19, 2014, at 10:15 a.m. in 2322 Rayburn House Office Building, the Subcommittee on Environment and the Economy will hold a hearing entitled “Cyanotoxins in Drinking Water."

Partnering With DC Water To Protect The Potomac River Partnering With DC Water To Protect The Potomac River

The Blue Plains Wastewater Treatment Facility in Washington, D.C. is the largest advanced wastewater treatment plant of its kind in the world, treating 330 million gallons of wastewater every day.

WEDECO PRO<sub>3</sub>MIX Overview WEDECO PRO3MIX Overview

The PRO3MIX bromate control system is an intelligent ozone-based advanced oxidation process (AOP) introduction and reaction system enabling ozone treatment in a compact and intelligent design to mitigate bromate formation even in cases of high level bromide in source water. This short animated overview walks the reader through the various disinfection points of the process.

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NUTRIENT REMOVAL NEWS

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ABOUT NUTRIENT REMOVAL

 

About Nutrient Removal

Nutrient removal from wastewater consists of treating wastewater to remove nitrogen and phosphorus before it reenters natural waterways. High levels of nitrogen and phosphorus in wastewater cause eutrophication, a process where excess nutrients stimulate excessive plant growth such as algal blooms and cyanobacteria. The decomposition of the algae by bacteria uses up the oxygen in the water causing other organisms to die. This creates more organic matter for the bacteria to decompose. In addition, some algal blooms can produce toxins that contaminate drinking water supplies.

As authorized by the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) permit program regulates point sources, such as municipal wastewater treatment plants, that discharge pollutants as effluent into the waters of the United States. In recent years, many of the States’ environmental bodies have lowered nutrient limits to arrest eutrophication. Maryland’s effort to protect the Chesapeake Bay and its tidal tributaries is perhaps the most notable example of nutrient removal in the US. Nutrient removal continues to be a growing area of focus for wastewater treatment throughout the world.   

The removal of nitrogen and phosphorus require different nutrient removal processes. To remove nitrogen, the nitrogen is oxidized from ammonia to become nitrate through a process called nitrification. This process is then followed by denitrification where the nitrate is reduced to nitrogen gas which is released to the atmosphere and removed from the wastewater.

Nitrification is a two-step aerobic process which typically takes place in aeration tanks. Denitrification requires anoxic conditions to encourage the appropriate biological conditions to form. The activated sludge process is often used to reduce nitrate to nitrogen gas in anoxic or denitrification tanks.

Phosphorus can be removed biologically using polyphosphate accumulating organisms (PAOs) which accumulate large quantities of phosphorus within their cells and separate it from treated water. Phosphorus removal can also be achieved by chemical removal. Once removed as sludge, phosphorus may be stored in a land fill. However, many municipalities and treatment facilities are looking to resell the biosolids for use in fertilizer.