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NUTRIENT REMOVAL ARTICLES BY KEVIN WESTERLING

3 Alternative Nutrient-Removal Techniques

3 Alternative Nutrient-Removal Techniques

With a little help from water-quality managers, Mother Nature can do the job of remediating impaired or at-risk watersheds, while making them more resilient to nutrient loading.  Continue Reading...
Shortcut Nitrogen Removal: The Next Big Thing In Wastewater

Shortcut Nitrogen Removal: The Next Big Thing In Wastewater

A vast improvement on conventional biological nutrient removal could save the wastewater treatment industry untold millions.  Continue Reading...
How To Utilize Nutrients To Your Advantage

How To Utilize Nutrients To Your Advantage

Using nitrogen and phosphorus to create algal biomass may be the energy solution for tomorrow.  Continue Reading...
5 Reasons To Consider Decentralized Wastewater Treatment

5 Reasons To Consider Decentralized Wastewater Treatment

The economic and environmental costs of treating all wastewater at a centralized location can be a burden. At what point does decentralized treatment make more sense?  Continue Reading...
From the Editor

NUTRIENT REMOVAL CASE STUDIES

  • 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.

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NUTRIENT REMOVAL PRODUCTS

HYBACS - Energy-Efficient Hybrid Activated Sludge Technology

HYBACS - Energy-Efficient Hybrid Activated Sludge Technology

The HYBACS proacess is an innovative hybrid activated-sludge system that is well-suited for municipal and industrial WWTPs looking for an economical technology for capacity upgrades and nutrient removal capabilities.

Xtream™ Ultrafiltration

Xtream™ Ultrafiltration

The Kruger Xtream™ Ultrafiltration (UF) system provides a modular, compact solution for efficiently producing drinking water and treating wastewater. The Xtream UF system removes particulates, bacteria and pathogens, algae and colloids and is able to meet increasingly stringent environmental regulations. The Kruger UF design provides a compact footprint and fully-automated design.

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.

ANITA™ Mox Solution For High Strength Ammonia Streams

ANITA™ Mox Solution For High Strength Ammonia Streams

Kruger’s ANITA™ Mox process combines nitritation and anammox reactions in an MBBR biofilm process using a single reactor. The reactions are maintained by control of DO in the reactor.

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NUTRIENT REMOVAL ARTICLES

  • PhosphoReduc™ — Emerging Solutions For Phosphorus Removal And Reuse

    Nutrients such as nitrogen and phosphorous can provide many benefits when they are properly used.  When they are applied as a fertilizer at agronomic rates they improve crop production. By Aleksandra Drizo

  • Engineering Angle: The Future Is Here — Embracing A New Paradigm In The World Of Water
    Engineering Angle: The Future Is Here — Embracing A New Paradigm In The World Of Water

    Among the prominent advancements in improving public health and environment over the past two hundred years, collection and treatment of domestic wastewater ranks near the top.  The traditional view of wastewater treatment has been of a “linear pipeline,” whereby wastewater is collected at one end of a watershed, transported as quickly as practical to the other end, where it is treated and discharged to the nearest waterbody as a disposal byproduct. By Art Umble, Ph.D., MWH Wastewater Practice Leader for the Americas region

  • The Benefits Of An Integrated Watershed Approach To Nutrient Management
    The Benefits Of An Integrated Watershed Approach To Nutrient Management

    How to look beyond the wastewater treatment plant for sustainable, holistic solutions to nutrient loading

  • White Paper: Wastewater Lagoons - A New Aeration Concept
    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
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NUTRIENT REMOVAL SUPPLIERS

  • Aqua-Aerobic Systems, Inc.
    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 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
    Degremont Technologies

    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
    Ovivo

    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

    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

    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.
    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

    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 - 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

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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.