NUTRIENT REMOVAL ARTICLES BY KEVIN WESTERLING
NUTRIENT REMOVAL CASE STUDIES
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, 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)
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
NUTRIENT REMOVAL PRODUCTSMore Products & Services
NUTRIENT REMOVAL ARTICLES
Benefits Of IFAS For Enhanced Biological Nutrient Removal (BNR)
One of the major concerns regarding municipal wastewater treatment plant discharge is the rising concentration of nutrient compounds, specifically nitrogen and phosphorus. Nitrogen and phosphorus are the primary causes of cultural eutrophication (i.e., nutrient enrichment due to human activities) in surface waters.
Passive Filter - Sustainable BMP For Permanent Stormwater Treatment Of Heavy Metals, Nutrients, Hydrocarbons And Sediment Passive filtration provides a sustainable alternative to classical drainage concepts for source control of hydrocarbons, heavy metals and nutrients that endanger our water bodies. By Royal Environmental Systems, Inc.
Development Of MBR Suitable For Retrofit With Flat Sheet Membrane
In sewage works of Japan near bay areas, the tightening of restrictions on nitrogen and phosphorus has resulted in greater needs for reconstruction and replacement of infrastructure, to switch from the conventional activated sludge process to the advanced treatment process without newly expanding aeration tanks.
White Paper: Passive Filter - Sustainable BMP For Permanent Stormwater Treatment Of Heavy Metals, Nutrients, Hydrocarbons And Sediment Passive filtration provides a sustainable alternative to classical drainage concepts for source control of hydrocarbons, heavy metals, and nutrients that endanger our water bodies. In urban areas with high building density, traditional drainage concepts like wetlands are not available and the concept of decentralized treatment facilities that can be housed in catch basin structures are a viable option for treatment of pollutants. By Royal Environmental Systems, Inc.
White Paper: Biological Nutrient Removal Microbiology Metabolic Pathways of Biological Nutrient Removal Biological Nutrient Removal (BNR) is critical for the preservation of our lakes and streams... Large amounts of waste products are passed through our sewage treatment systems on a continuous basis...
NUTRIENT REMOVAL SUPPLIERS
Aqua-Aerobic Systems, Inc.
Since 1969, Aqua-Aerobic Systems, Inc. has been a leader in the design and manufacture of wastewater treatment equipment and systems for both municipal and industrial markets, worldwide.
Headworks International Inc.
Headworks Inc. is a total solutions provider offering wastewater screening, MBBR/IFAS biological treatment, and tertiary filtration products to the worldwide municipal and industrial treatment industry.
Degremont Technologies Water Treatment Equipment |Wastewater Treatment Equipment |Sludge Management Equipment
Ovivo brings together more than 200 years of collected experience, process expertise and proven technologies; but that doesn’t mean that we’re complacent. Over past centuries of growth, development and refinement we have been guided by the principle of delivering value to our clients. Our equipment and technologies already have a reputation for long-term durability and reliability, offering decades of use and leading to lasting relationships with key customers.
Severn Trent Services
Severn Trent Services is a leading supplier of water and wastewater treatment solutions. We provide our clients with some of the industry’s brightest minds, advanced technologies, and quality products to provide you with truly efficient, cost-effective solutions to your water and wastewater challenges
Evoqua Water Technologies
Evoqua Water Technologies, formerly Siemens Water Technologies, is a leader in water and wastewater treatment products, systems and services for industrial and municipal customers. We offer a wide range of proven product brands and advanced water and wastewater treatment technologies, mobile and emergency water supply solutions and service contract options.
Smith & Loveless, Inc.
For more than 60 years, Smith & Loveless' pre-engineered water and wastewater treatment and pumping systems have paved the way for municipalities, developments, industry, governmental, and military facilities.
Veolia Water Technologies
Veolia Water Technologies offers comprehensive water and wastewater solutions for industrial and municipal customers. With unique technologies and process expertise, Veolia specializes in engineering, design, and project management, construction and execution.
WRT - Water Remediation Technology, LLC
WRT provides effective processes for removing radium, uranium and other contaminants from water. Our complete package of services includes process equipment, proprietary treatment media, safe exchange of media, and proper handling and disposal of used media
NUTRIENT REMOVAL VIDEOS
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.
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.
Recycle/Reuse Test Program For The Hydroponic Greenhouse Industry Positive Stage Two Preliminary Results
Dr. Gene Shelp, President and CEO of ENPAR Technologies Inc. (“ENPAR” or “the Company”), is pleased to announce that operation of the ESD CapDi unit was initiated last week at an Ontario hydroponic greenhouse operation.
Toxic Algae Prep A Priority In Michigan
Ottawa County, MI, wants to be ready if toxic algae strikes.
Water And Agriculture Leaders Plant Seeds For Environmental Progress In Rare Collaboration
The US Water Alliance issued a report recently highlighting common ground and innovative strategies between agriculture and water and wastewater utilities to reduce nutrient pollution in the Mississippi River Basin.
The World’s Largest Deammonification System To Be Provided By World Water Works For DC Water
World Water Works, Inc., a leading designer and manufacturer of wastewater treatment solutions, has been selected by the District of Columbia Water and Sewer Authority – Blue Plains (DC Water) to provide its DEMON technology.
Algae Systems Testing Algae Bio-Fuel Production
Algae Systems LLC completed demonstration of a new biofuel production approach in early-August jointly with Japan’s IHI Corporation.
Toxic Algae's Newest Hot Spot
It's not just Toledo struggling with blue-green algae.
USDA Invests New Conservation Funds To Improve Lake Erie Water Quality
Agriculture Secretary Tom Vilsack announced recently that $2M in conservation funds will be sent to Ohio to help implement conservation techniques that will help improve water quality.
Nutrinsic Corporation Raises $12.7M To Fuel Growth
Nutrinsic Corporation (www.nutrinsic.com) has completed a $12.7 million capital raise to support continued growth of its sustainable protein business.
Are Farmers To Blame For Minnesota’s Nitrate Problem?
Minnesota has a problem with nitrates, and state officials say the agriculture industry may not be doing enough to resolve it.
EPA Approves Pollution Budget For Restoring Maryland Coastal Bays
The U.S. Environmental Protection Agency has approved the pollution budget developed by Maryland to reduce nitrogen and phosphorus in Maryland’s coastal bays and tributaries to levels that meet water quality standards.
Iowa Utilities Dumping Nitrates Into Waterways
Many Iowa water utilities funnel what some consider pollution back into environmental waterways.
Toledo Water Ban Lifted, But Toxic Algae Could Return
The ban on water use in Toledo was lifted at 9:30 a.m. Monday Aug. 4, after hundreds of thousands were unable to use their water for over two days due to toxic algae contamination.
World Water Works To Unveil Exciting New Bulking Sludge Management Technology At WEFTEC 2014
World Water Works, Inc., a leading designer and manufacturer of wastewater treatment solutions, will unveil revolutionary new sludge bulking management technology at WEFTEC 2014.
RWL Water To Supply PEICo With Sixteen Skid Mounted Mobile Water Treatment Systems
RWL Water was recently hired to supply sixteen skid mounted mobile water treatment systems for Pooled Equipment Inventory Company (PEICo), a company dedicated to resolving common equipment and inventory-related problems in the nuclear electric utility industry.
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.