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NUTRIENT REMOVAL ARTICLES BY KEVIN WESTERLING

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...
The Surprising Answer To Nutrient Removal

The Surprising Answer To Nutrient Removal

Algae has caused a lot of trouble in the water industry in recent years. But new research may just redeem the water industry foe.  Continue Reading...
Save Nutrients, Save The World

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.  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

METEOR® 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.

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.

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.

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.

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NUTRIENT REMOVAL ARTICLES

  • Development Of MBR Suitable For Retrofit With Flat Sheet Membrane
    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.

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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

NUTRIENT REMOVAL VIDEOS

  • Superior Effluent Quality With Batch Reactor Technology
    Superior Effluent Quality With Batch Reactor Technology

    Changing effluent demands are a common challenge for wastewater treatment plant operators. The AquaSBR sequencing batch reactor provides an adaptive solution, delivering enhanced biological nutrient removal (EBNR) with flexible design and process control. Watch this video to see a 3D animation of the system’s five-phase operation.

  • Video: Vertical Loop Reactor (VLR) System
    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.

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NEWS

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ABOUT

 

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.