NUTRIENT REMOVAL ARTICLES BY KEVIN WESTERLING
NUTRIENT REMOVAL CASE STUDIES
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
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
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.
NUTRIENT REMOVAL PRODUCTSMore Products & Services
NUTRIENT REMOVAL ARTICLES
White Paper: Wastewater Lagoons - A New Aeration Concept The use of wastewater treatment lagoons, or stabilization ponds, is a common practice for rural municipalities and industrial facilities. Through the years there have been numerous designs for these ‘sludge settling basins,’ ranging from facultative, partial aerated, and fully aerated systems. By Jim Dartez, RELIANT Water Technologies
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.
Save Nutrients, Save The World
While regulations demand that wastewater treatment plants get nutrients out of the water, the world’s food supply may demand more — that we recover and reuse them.
Simultaneous Determination Of Total Bound Nitrogen (TNb) And Total Organic Carbon (TOC) In Aqueous Samples Total bound nitrogen (TNb) consists of dissolved ammonia, nitrates, nitrites, amines, and other organic nitrogen-containing compounds. TNb measurements represent an alternative to Total Kjeldahl Nitrogen (TKN) analysis for rapid screening of industrial wastewater, drinking water,agricultural run-off, and surface waters. By OI Analytical
Consultant's Corner: The Impact Of Water Treatment Plant Processes On Algae And Algal Toxins
Algae causes many issues with water treatment plant operations including: clogging of intake screens, fouling of weirs, disruption of floc settling, production of algal mats, filter clogging from algae or from extracellular organic matter (EOM), increase coagulant demand, increased chlorine demand, increased disinfection by products, pH fluctuations, tastes and odors and release of algal toxins. By Lee H. Odell, PE, CH2M HILL
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 is the Equipment Business Line Division of Degrémont, S.A., the international water treatment plant specialist, and a subsidiary of SUEZ ENVIRONNEMENT, a key player in the field of sustainable development.
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 Solutions & Technologies
Veolia Water Solutions & 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
Video: Vertical Loop Reactor (VLR) System
VLR® Systems 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.
Chemical-Free Pretreatment Technology
This video demonstrates the advantages of using OpenCEL technology for the pretreatment of secondary waste-activated sludge generated during advanced biological wastewater treatment. OpenCEL employs high frequency electrical pulses to break open biomass cell membranes, releasing soluble material that is more readily digested. Learn how the chemical-free technology can cut costs and recover energy.
Xylem Solution Cuts Annual Operational Costs At Italian Wastewater Treatment Plant By 65 Percent
Xylem Inc., a leading global water technology company dedicated to solving the world’s most challenging water issues, has reduced the energy consumption of a wastewater treatment plant in Italy by 65 percent.
Xylem Names Patrick K. Decker President And Chief Executive Officer
Xylem Inc. (NYSE: XYL), a leading global water technology company dedicated to solving the most challenging water issues, today announced that Patrick K. Decker has been named President and Chief Executive Officer, and will be appointed a member of the Board of Directors on March 17. He joins the company from Harsco Corporation, where he has been President and CEO. At Xylem, Mr. Decker succeeds Steven R. Loranger who will remain a member of the Xylem Board. Mr. Loranger was Chairman, President and CEO of ITT Corporation when it spun its water businesses off as Xylem in October 2011.
Assessing Nutrient Inputs To The Nation’s Estuaries And Great Lakes
Nutrient enrichment of our nation's streams, lakes, and estuaries is widespread and can contribute to harmful algal blooms, increasing costs for drinking water and causing declines in ecosystem health.
USDA Announces New Grants To Help Communities Meet Water Challenges In Coming Years
Agriculture Secretary Tom Vilsack announced recently that USDA's National Institute of Food and Agriculture (NIFA) will make $6M in grants available this year, and up to $30M total over the next five years as part of a new initiative to provide solutions to agricultural water challenges.
Skye Petroleum Acquires Patented Technology For The Removal Of Volatile Phosphate From Hydrocarbon Based Fracturing Fluids
Skye Petroleum, Inc. (Pink Sheets: SKPO) is pleased to announce that it has acquired (from a private company) a patent recently issued by the U.S. Patent and Trademark Office.
Utilities Push Wisconsin To Delay Phosphorous Rules
Wisconsin might push back the start date for expensive new phosphorous regulations.
Introducing FlexiFloat™ Self-Deploying Segmented Float For Aqua-Jet® Surface Aerators And AquaDDM® Mixers
The new FlexiFloat™ is a unique, segmented and space saving float that replaces the conventional float on Aqua-Aerobic Aqua-Jet® surface aerators and AquaDDM® mixers. This patent pending product folds into a compact, cylindrical arrangement for easy shipping, storage and installation. Once lowered into place, the float self-deploys as it meets the surface water in the tank or basin.
Candidates Clash Over Nutrients
Nutrient rich water has become a defining topic in the Florida gubernatorial race.
Severn Trent Services To Provide World’s Largest Fixed-Film Denitrification System
Severn Trent Services, a leading global supplier of water and wastewater treatment solutions, was awarded a contract from Archer Western Contractors, LLC., to provide its TETRA Denite denitrification filter technology to the Back River Wastewater Treatment Plant (WWTP) in Baltimore, Md.
Wisconsin May Amend Phosphorus Discharge Requirements
A new phosphorous compliance bill was recently introduced into the Wisconsin state legislature.
Iowa Nutrient Plan On The Chopping Block?
Iowa lawmakers had positive remarks about the state's water quality strategy at a hearing last week, but ongoing funding for the program may not be certain.
Florida Gets Positive Ruling In Nutrient Case
Florida received good news recently in a lengthy legal battle about who gets to regulate its waters.
EPA Awards Almost $9M In Grants To Researchers Working To Improve Water Quality
Recently at the 14th National Conference and Global Forum on Science, Policy and the Environment, U.S. Environmental Protection Agency (EPA) Administrator Gina McCarthy announced grants to four research institutions for innovative and sustainable water research to manage harmful nutrient pollution.
RETTEW Project Selected For Premier Project Award
RETTEW is pleased to announce the firm’s project, Highspire Borough Authority Wastewater Treatment Plant Upgrades, was named a 2013 Premier Project by Dauphin County in the infrastructure category. The award is given to projects that aid communities as they make planning decisions, promote smart growth and spark revitalization.
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.