NUTRIENT REMOVAL CASE STUDIES & WHITE PAPERS

VLR® System For Biological Treatment

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

  • Retrofit Helps WWTP Meet New Total Nitrogen Limit
    Retrofit Helps WWTP Meet New Total Nitrogen Limit

    The City of East Providence WWTP was asked by RIDEM to upgrade its facilities to increase treatment capacity and also meet a new more stringent Total Nitrogen limit.

  • Howard County, Maryland Sets The Pace In Restoring Chesapeake Bay Ecosystem
    Howard County, Maryland Sets The Pace In Restoring Chesapeake Bay Ecosystem

    Howard County, Maryland, Bureau of Utilities recently completed the $92-million Addition No. 7 project at the Little Patuxent Water Reclamation Plant (LPWRP) to improve the quality of the plant’s effluent discharge and to reduce harmful nutrients reaching Chesapeake Bay. The project’s various increments took over five years to complete and incorporated innovative design solutions and state-of-the-art technologies for denitrification, aeration and disinfection. The project presents a model for Maryland’s 66 largest wastewater treatment plants and possibly procurement of municipal facilities elsewhere facing increasingly stringent regulatory changes.

  • Solving A Taste and Odor Problem Step By Step (Article)
    Solving A Taste and Odor Problem Step By Step (Article)

    The City of Alliance Ohio’s water system has experienced annual Taste and Odor (T&O) events since the mid 1950’s, when the first of two reservoirs, Deer Creek Reservoir, was placed into service. Nutrient contaminants, in particular phosphorous, in the watershed accumulate in the reservoirs causing algal blooms. By Terry Keep of TrojanUV, Said Abou Abdallah of Arcadis, and Dr. Dean Reynolds, Department of Water Treatment City of Alliance, Ohio

  • How Can Seasonal Establishments Treat Their Wastewater Economically?
    How Can Seasonal Establishments Treat Their Wastewater Economically?

    Opened a few months per year, seasonal establishments typically experience important fluctuations in the number of visitors. Energy consumption and operating expenses must continually be analysed and optimized. The implementation of efficient energy management practices and the integration of innovative wastewater treatment solutions that can improve their cost-efficiency ratio have become major sources of savings for this whole industry.

  • Meeting State Nutrient Regulations With SBRs
    Meeting State Nutrient Regulations With SBRs

    After the Missouri Department of Natural Resources reclassified the effluent receiving stream in the city of Sullivan, officials learned that its wastewater treatment lagoon required a more advanced treatment process to comply. They selected a continuous-flow sequencing batch reactor (SBR) system that utilizes a modified activated sludge biological treatment. The new infrastructure has provided cost-saving results for the ongoing removal of nitrogen and phosphorous.

  • Disc Aerators Replace Brush Aerators, Increasing Capacity And Performance
    Disc Aerators Replace Brush Aerators, Increasing Capacity And Performance

    To comply with new EPA rules and handle additional flow, the City of St. Charles Missouri WWTP required a capacity increase, and the landlocked plant needed a solution that would fit within its existing footprint. Brush aerators and boat clarifiers were replaced with 12 VLR-mounted disc aerators to fulfill the oxygen requirement while allowing for the treatment of higher organic loading. The solution provided increased nutrient-removal capacity and improved efficiency without increasing tank volume.

  • Top-Entry Agitators Keep Costs Low, Combat Pollution
    Top-Entry Agitators Keep Costs Low, Combat Pollution

    As the drainage basin to 85 million people, the Baltic Sea has faced considerable environmental strain for many years. Updated regulations to reduce levels of phosphorous and nitrogen prompted the Central Wastewater Treatment Plant in Saint Petersburg, Russia, to install new top-entry agitators in its aeration basins. By optimizing thrust and bulk flow, the updated plant now combats pollution by treating 400 MGD of wastewater while keeping energy costs to a minimum.

  • Continuous Fill SBR Tanks Help WWTP Exceed Effluent Requirements, Generate Additional Revenue
    Continuous Fill SBR Tanks Help WWTP Exceed Effluent Requirements, Generate Additional Revenue

    In order to meet the anticipated effluent criteria required by the Pennsylvania DEP, the Newville Borough Water & Sewer Authority determined that its existing wastewater treatment facility needed renovations. By installing two continuous fill SBR tanks, the facility lowered total nitrogen below permit limits, reduced energy costs, and created a new revenue stream (selling unused nutrient allocations). Read the case study for full details.

  • DEMON Invades America: New Nutrient Removal Process Saves Money And The Environment
    DEMON Invades America: New Nutrient Removal Process Saves Money And The Environment

    Sustainable solutions can offer more than just environmental benefits. Green technologies can offer significant cost savings as well. Virginia utility Hampton Roads Sanitation District (HRSD) was looking for these when Chief of Special Projects, Charles Bott, approached World Water Works, a leading designer and manufacturer of wastewater treatment solutions, about the innovative and very environmentally friendly DEMON® deammonification system.

  • Oxygen Removal From Feedwater In A Central District Heating System
    Oxygen Removal From Feedwater In A Central District Heating System

    In central district heating systems, heated water from power plants is distributed to densely populated areas via insulated piping networks. High water quality is required to maintain the integrity of pipes, storage tanks, and other infrastructure in such systems. This case study explains how a Dutch power station achieved an O2 specification of <10 ppb for storage water tank filling by installing a chemical-free deoxygenation system.

Sewer Authority Ends Plant Bypasses And Introduces Nutrient Removal With New Treatment Process

The original contact stabilization activated sludge process at the Portage Area Sewer Authority generated hydraulic limitations that required repeated bypasses during heavy rainfall. Find out how the treatment plant upgraded its secondary treatment aeration system to include nutrient removal through a nitrification/denitrification/phosphorus process and has successfully processed I&I induced surges that reached a 10-MGD peak.

More Case Studies & White Papers

NUTRIENT REMOVAL PRODUCTS

Model R OXIGEST® Industrial Wastewater Treatment System

Model R OXIGEST® Industrial Wastewater Treatment System

The Model R OXIGEST® treatment system provides stable operation and flexible process options for sanitary and industrial/process wastewater applications with concentric tankage that maximizes space efficiency in its footprint.

 

ActiveCell&reg; Integrated Fixed Film Activated Sludge

ActiveCell® Integrated Fixed Film Activated Sludge

The Integrated Fixed-Film Activated Sludge (IFAS) process is typically installed as a retrofit solution for conventional activated sludge systems that are at or beyond capacity.

Biological Nutrient Removal

Biological Nutrient Removal

Biological Nutrient Removal (BNR) is a process used for nitrogen and phosphorus removal from wastewater before it is discharged into surface or ground water.

Wastewater Reuse

Wastewater Reuse

As world populations require both more clean water and better ways to dispose of wastewater, the demand for water reclamation will increase.

BioSphere&trade; MBBR / IFAS Biological Treatment System

BioSphere™ MBBR / IFAS Biological Treatment System

Innovative, reliable and cost effective, the BioSphere™ MBBR /IFAS System from Evoqua is a fixed-film process using thousands of a patented designed biomass carriers to create a large protected surface area for biofilm growth.

METEOR&reg; IFAS / MBBR Process

METEOR® IFAS / MBBR Process

METEOR® IFAS/MBBR technology is based on proprietary polyethylene biofilm carriers, which, when added to a treatment basin, provide a large internal surface area for the growth of microorganisms.

Sanitaire® Bioloop® Advanced Oxidation Ditch

Sanitaire® Bioloop® Advanced Oxidation Ditch

Reliable and efficient technologies are necessary for the treatment of municipal wastewater. Of the available technologies, the oxidation ditch process is well known for stable operation and reliable effluent quality.

Memthane® Anaerobic Membrane Bio-Reactor

Memthane® Anaerobic Membrane Bio-Reactor

Anaerobic Membrane Bio-Reactor technology opens the door to the treatment of high-strength waste streams previously considered economically untreatable through traditional anaerobic processes alone. Memthane® technology maximizes renewable energy production while producing superb quality effluent that can be reused or discharged directly to the sewer.

More Products & Services

NUTRIENT REMOVAL PODCASTS

A Commitment To Employee Ownership

A Commitment To Employee Ownership

Ryan Spanton, Regional Sales Manager with WesTech Engineering, talks about the company’s focus on customers as brand advocates and other trends for the water and wastewater industries.

What’s New In Filtration?

What’s New In Filtration?

John Dyson, Americas Sales Director for Severn Trent Services, discusses a new design in filter underdrains and nitrate removal using ion-exchange resins that facilitates brine reuse.

More Nutrient Removal Podcasts
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NUTRIENT REMOVAL VIDEOS

Water Purification Solutions From Severn Trent Services

Water Purification Solutions From Severn Trent Services

Severn Trent Services offers a broad range of water treatment technologies concentrated around disinfection and filtration. In this video, Sales Director John Dyson highlights the new Anchor-Rite® design for the TETRA® LP Block™, dual parallel lateral underdrains that are popular with plant owners as a retrofit or for new filter underdrain applications. Find out how the company is currently working with customers to identify needs and plan their product portfolio accordingly.

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.

Video: Integrated Fixed-Film Activated Sludge (IFAS) From Headworks BIO

Video: Integrated Fixed-Film Activated Sludge (IFAS) From Headworks BIO

The Integrated Fixed-Film Activated Sludge (IFAS) process is typically installed as a retrofit solution for conventional activated sludge systems that are at or beyond capacity.

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.

On-Line Probes For Analyzing Nutrient Removal From Wastewater

On-Line Probes For Analyzing Nutrient Removal From Wastewater

WEFTEC 2009 - Bob Dabkowski of Hach discusses a variety of the Company's instruments and on-line probes for analyzing nutrient removal from wastewater.

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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.