NUTRIENT REMOVAL ARTICLES BY KEVIN WESTERLING
NUTRIENT REMOVAL CASE STUDIES
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
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.
NUTRIENT REMOVAL PRODUCTSMore Products & Services
NUTRIENT REMOVAL ARTICLES
White Paper: Studies Of A Microbial Mixture With Useful Properties For The Treatment Of Organic Sewage The importance of bacteria in the treatment of raw sewage and water purification is well known. Here, we report on Sewper Rx, a unique mix of bacteria with powerful properties for treating sewage as well as other water cleaning applications. By Brian T. Butcher, PhD and Lisa Morici, PhD
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
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
The Benefits Of An Integrated Watershed Approach To Nutrient Management
Looking beyond the wastewater treatment plant for sustainable, holistic solutions to nutrient loading
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
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
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.
Severn Trent Services Expands Capabilities For Disinfection, Nutrient Removal, And Filtration
Water Online’s Ron Grunsby interviews John Dyson of Severn Trent Services to uncover the latest innovations and developments from the company, including the product line on display at WEFTEC 2012.
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.
A Continued Commitment To Help Prevent The Proliferation Of Blue-Green Algae: A New BNQ-Certified Phosphorus Removal And Disinfection Option Without UV Now Available
In response to the Quebec regulation in effect since early 2000 to better protect the environment, including the challenge of phosphorus and its role in the proliferation of blue-green algae blooms in our lakes and watercourses, Premier Tech Aqua (PTA), a Business Unit of the Environmental Technologies Group of Premier Tech, is proud to announce that it has reached a second technological breakthrough and another world first in the onsite wastewater treatment industry.
Newly Formed Wastewater Treatment Technology Provider CNP Acquires Worldwide Licenses For Innovative Struvite Removal Process AirPrex
CNP-Technology Water and Biosolids Corporation (CNP), a newly formed wastewater treatment technologies provider, recently announced that it has acquired the exclusive worldwide patent licensing for AirPrex from P.C.S. GmbH, based in Hamburg, Germany.
Nitrogen Removal Treatment System Provides Numerous Advantages For Food And Beverage Processing Facilities
World Water Works, Inc., a manufacturer of wastewater treatment solutions, announces the availability of the DEMON treatment system for removal of nitrogen from wastewater.
New Poultry Litter Applicator Can Cut Nutrient Runoff, Protect Water Quality
Researchers will demonstrate a prototype farm implement that slashes nutrient runoff and bacterial contamination from poultry litter at this year’s Manure Science Review.
New Reports Detail Lack Of Progress In Cleaning Up Chesapeake Bay Tributaries Over The Last Decade
A recent U.S. Environmental Protection Agency report card on the Chesapeake Bay was headlined “partners are making progress in Chesapeake Bay cleanup.”
Portman Algae Bill Signed Into Law
Recently, U.S. Senator Rob Portman (R-Ohio) announced that President Obama has signed into law his algae legislation, the Harmful Algal Blooms and Hypoxia Research and Control Amendments Act of 2013.
Innovative Water Technologies Sought For Stormwater And Wastewater Collection/Treatment Operations
The Leaders Innovation Forum for Technology (LIFT) is now seeking submissions from innovative technology providers for solutions that can be applied in the water quality industry.
Scientists From Twelve Land-Grant Universities Forge Partnership With Mississippi River/Gulf Of Mexico Watershed Hypoxia Task Force
Scientists from land-grant universities in 12 central U.S. states have entered into a partnership with the Mississippi River/Gulf of Mexico Watershed Hypoxia Task Force to support state and national efforts to reduce water pollution and help to maintain the productivity and vitality of American agriculture.
Landia Completes Mixer And Pump Retrofit For New Utah Bioreactors
At the newly expanded 30 MGD (million gallons daily) Wastewater Treatment Facility in American Fork, Utah, Landia has completed a successful pump and mixer retrofit that has transformed eight existing oxidation ditches into new high-rate activated sludge bioreactors with biological nutrient removal, solids dewatering, and UV disinfection.
Portage La Prairie Looks To Nutrient Recovery Technologies To Reduce Pollution
A pilot program underway at the City of Portage la Prairie's Water Pollution Control Facility (WPCF) is evaluating innovative technologies to help manage nutrient loads treated at the plant, including one developed by Ostara Nutrient Recovery Technologies that recovers phosphorus from treated wastewater streams and transforms it into an eco-friendly, slow-release fertilizer.
Government Makes Progress On 'Dead Zones' In Mississippi Basin
States charged with reducing pollution in the Mississippi River and Gulf of Mexico basin are on their way to implementing new plans.
Severn Trent Services Appoints Lawrence Quinn Chief Executive Officer, Water Purification
Severn Trent Services, a leading global supplier of water and wastewater solutions, announced that Lawrence Quinn has been appointed to the position of chief executive officer for the company’s Water Purification business.
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.