NUTRIENT REMOVAL CASE STUDIES & WHITE PAPERS

Harmful Algae: How To Stay Ahead Of The Bloom
Harmful Algae: How To Stay Ahead Of The Bloom

It’s the call no water treatment plant superintendent wants to receive, especially not while on vacation. Andy McClure, Superintendent of Toledo, Ohio’s Collins Park Water Treatment Plant, answered his phone to hear his head of operations report that the level of microcystin in the finished water was high, caused by a large harmful algal bloom (HAB) that was impacting the plant’s Lake Erie intake.

  • Savings Helps MABRs Gain Traction In Municipalities
    Savings Helps MABRs Gain Traction In Municipalities

    An MABR is essentially a biological wastewater treatment process that utilizes seemingly passive aeration through oxygen-permeable membranes. Oxygen transfer through the MABR membranes is diffusion based: driven by concentration differences such that oxygen passes from air at atmospheric pressure into water at a higher hydrostatic pressure. This oxygen transfer mechanism, wherein air is supplied to the process at very low pressure, is the reason MABRs have significantly lower energy consumption compared to other wastewater treatment processes, such as conventional activated sludge (CAS), that utilize diffusers. This energy savings is one of the key reasons MABRs are gaining traction in the municipal wastewater industry.

  • OSCAR System DINO Controller Reduces Nutrient Return And Improves Energy Efficiency
    OSCAR System DINO Controller Reduces Nutrient Return And Improves Energy Efficiency

    Faced with rising operating costs due to increasing energy and chemical prices as well as stricter effluent permit limits, many operators and engineers are turning to sensors and automation as a means to enhance treatment performance and reduce operating costs while limited capital expenses. In order to overcome these challenges, an advanced process control solution was implemented in an aerobic digester in Green Lake, Wisconsin.

  • Optimizing Chemical Dosing Reduces Chemical Use While Meeting Effluent TP Limits
    Optimizing Chemical Dosing Reduces Chemical Use While Meeting Effluent TP Limits

    The city of Black River Falls in Wisconsin used chemical treatment with ferric chloride (FeCl3) to achieve their effluent total phosphorus (TP) permit of 1.0 mg/l. Historically, the chemical dosing rate was manually adjusted on a daily basis based on the measured effluent TP concentration. The plant was upgraded with an OSCAR process performance optimizer control system with phosphorus controller, which uses continuous measurement of orthophosphate. Read the full case study to learn more.

  • Do More With Less: Integrating Nutrient Removal Control Improves Treatment Capacity And Efficiency
    Do More With Less: Integrating Nutrient Removal Control Improves Treatment Capacity And Efficiency

    Wastewater treatment plants (WWTP) are facing many challenges. Permits on nitrogen and phosphorus in the effluent water are progressively becoming stricter in order to protect surface waters from eutrophication. At the same time, plants are required to reduce both energy and chemical consumption and are often challenged with limited time and staff. In total, they are required to do more with less. In order to meet these challenges, a plant with a Sequencing Batch Reactor (SBR) in Green Lake, Wisconsin was upgraded with an advanced process control system – the OSCAR process performance optimizer with NURO controller.

  • Efficacy Of Electrocoagulation Technology On Selenium-Contaminated Mine Effluent
    Efficacy Of Electrocoagulation Technology On Selenium-Contaminated Mine Effluent

    This paper helps to understand the efficacy of BakerCorp Electrocoagulation (EC) technology and treatment process in treating selenium-contaminated mine effluent. Two mine effluent samples were treated by Baker EC. Selenium constituent concentrations in both water samples were reduced significantly to below reporting qualification limits. Based on the results of the effluent samples, electrocoagulation is an effective treatment option for waste streams found to contain selenium.

  • Granular Activated Carbon: A Long-Term Solution For Meeting DPB Compliance
    Granular Activated Carbon: A Long-Term Solution For Meeting DPB Compliance

    When the Cobb County-Marietta Water Authority (CCMWA) anticipated the need to upgrade the Hugh A. Wyckoff water treatment plant, they turned to granular activated carbon (GAC) technology after vetting several alternatives. The plant, a wholesaler in a two-plant system, processes up to 72 million gallons per day and serves about 350,000 people. Comprising of Wyckoff and the James E. Quarles treatment plant, CCMWA is the second largest water provider in Georgia.

  • A Wastewater Solution With Low Capital Costs
    A Wastewater Solution With Low Capital Costs

    Along the Indian River Lagoon adjacent to Vero Beach, Florida, both residents and government officials were becoming increasingly concerned about excessive nutrient loads and pollution.

  • Aerobic Granular Sludge System Reduces Energy Up To 50% When Compared To Conventional Activated Sludge Systems
    Aerobic Granular Sludge System Reduces Energy Up To 50% When Compared To Conventional Activated Sludge Systems

    The AquaNereda® Aerobic Granular Sludge System (AGS) is an innovative biological wastewater treatment technology that provides advanced treatment using the unique features of aerobic granular biomass. This advanced nutrient removal process can reduce footprint up to 75% and energy up to 50% when compared to conventional activated sludge systems.

  • The World’s Largest Drinking Water Plant Using Ozone Serves 1.6 Million Customers
    The World’s Largest Drinking Water Plant Using Ozone Serves 1.6 Million Customers

    Facing new limits on acceptable levels of DBPs in the drinking water, as well as age-old complaints about the taste of the water during the summer algal bloom, the North Texas Municipal Water District turned to ozone disinfection as a possible alternative able to address both concerns.

  • Improving Total Nitrogen Removal
    Improving Total Nitrogen Removal

    To protect the sensitive waters of the Neuse River Basin, the State of North Carolina formally adopted a nutrient management strategy in 1997 which established Total Maximum Daily Loads for all point source contributors of Total Nitrogen (TN) to the Neuse River. By upgrading its oxidation ditches, this Eastern NC plant saw a reduction of 76% TN compared to its average discharge from the past 6 years.

ACTIFLO And Hydrotech Discfilter: A Two Stage Process
ACTIFLO And Hydrotech Discfilter: A Two Stage Process

The state of Minnesota instituted a new water quality requirement that limits cities along the Minnesota River to a 1 mg/L Total Phosphorus limit by 2015 to prevent algae blooms and resulting pollution problems.

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NUTRIENT REMOVAL PRODUCTS

Denitrification Featuring Snap-T® Block Underdrain Denitrification Featuring Snap-T® Block Underdrain

The DE NORA TETRA™ Denite® system combines denitrification and filtration for the effective removal of nitrate-nitrogen and suspended solids in a single treatment step. Unique SNAP-T® Block underdrain provides superior distribution of backwash air and water, resulting in more efficient bed cleaning and reduced filter operating costs. Revolutionary interlocking grid design has no moving parts and resists uplift without the need for grout or anchors.

OMNIFLO® Sequencing Batch Reactor (SBR) MAX System OMNIFLO® Sequencing Batch Reactor (SBR) MAX System

Evoqua's OMNIFLO® SBR MAX system with Jet Tech technology combines the benefits of a true-batch SBR with the benefits of a continuous fill batch reactor process to treat wastewater influent flows to over 5 times design.  The OMNIFLO SBR MAX system optimizes hydraulic handling during storm flows, reduces equipment sizing and cost, and can trim energy costs over 15%!

Aspiral™ Packaged Wastewater Treatment Solution (MABR) Aspiral™ Packaged Wastewater Treatment Solution (MABR)

Aspiral™ is a smart, packaged wastewater treatment solution based on the Membrane Aerated Biofilm Reactor (MABR) technology.

Vorelodos Vorelodos

Often times the biosolids management portion of the treatment plant may not be optimized, resulting in inefficient operation of the entire treatment plant. For instance, did you know that aerobic digestion is the second largest consumer of energy after biological treatment aeration at a wastewater treatment plant? Or, do you realize that up to 50% of the nutrient loading on any given day may be coming from the biosolids process?

OSCAR™ Process Performance Optimizer OSCAR™ Process Performance Optimizer

The benefits of an OSCAR system are clear. The OSCAR control system is a customizable, integrated system comprised of hardware, software, and services. Designed to be used with Sanitaire biological treatment solutions, OSCAR helps plants meet their performance requirements and operating budgets.

TITAN MBR QUBE™ TITAN MBR QUBE™

The TITAN MBR QUBE™ is a complete, factory-built, packaged wastewater treatment system featuring a compact design for simple shipping and mobility. Equipped with the same TITAN MBR™ technology that has made S&L an industry leader in pre-engineered treatment systems, the TITAN MBR QUBE™ provides simple, economical and efficient plug and play treatment in a much smaller footprint than conventional treatment systems. The TITAN MBR QUBE™ is a 40-ft long cube shipping container; delivered directly to the job site, minimal assembly required.

AquaNereda AquaNereda

The AquaNereda® Aerobic Granular Sludge System is an innovative biological wastewater treatment technology that provides advanced treatment using the unique features of aerobic granular biomass. The unique process features of the AquaNereda system translate into a flexible and compact process that offers energy efficiency and significantly lower chemical consumption.

SCOUT Hydro Profiling System SCOUT Hydro Profiling System

The Reliant Water Technologies SCOUT Hydro Profiling System is the answer to obtaining clear and concise shallow water survey data quickly and inexpensively. By not only providing a visual hydrographic ‘picture’ of everything underwater, in any shallow body of water, the SCOUT also provides the volume of sludge in the water body (as well as the volume of free water). The ‘picture’ provided is color enhanced in order to provide clear, definitive delineation of variable depths of sludge, or debris, and includes multi-point water depth over-lays.

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NUTRIENT REMOVAL PODCASTS

Intensification Concept At Wastewater Plants Explained Intensification Concept At Wastewater Plants Explained

Carollo Engineers, an environmental engineering firm that specializes solely on the planning, design, and construction of water and wastewater facilities has identified five major trends in the industry.

Enhanced Primary Treatment Reduces Energy By Separating BOD Before Aeration Enhanced Primary Treatment Reduces Energy By Separating BOD Before Aeration

At WEFTEC 2016, Evoqua Water Technologies explored six core challenges faced by wastewater treatment plants -- energy reduction, nutrient removal, odor and corrosion control, aging plant equipment, water reuse and disinfection. In this Water Online Radio interview, Paul Rice, Municipal Marketing Director with Evoqua Water Technologies, discusses energy reduction and nutrient removal in more detail.

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NUTRIENT REMOVAL VIDEOS

The CoMag® System For Enhanced Primary And Tertiary Treatment The CoMag® System For Enhanced Primary And Tertiary Treatment

The innovative CoMag System from Evoqua infuses magnetite into chemical floc to make it heavier, significantly improving clarifier performance. This video explains how the CoMag® System works and how it can be used to increase capacity, enhance clarifier performance and achieve total phosphorous of 0.05 mg/L.

Monitoring Nutrient Loading Via Satellite Monitoring Nutrient Loading Via Satellite

Blue Water Satellite uses satellite technology to monitor nutrient loading on land and in water bodies. Blue Water Satellite can compare current and past data to give a far greater picture of land and water body health than previously thought possible.

Ferazur/Mangazur® Animation Video Ferazur/Mangazur® Animation Video

Ferazur/Mangazur are biological filtration processes for the removal of iron, manganese and arsenic from groundwater sources. The precipate is removed by using Biolite "S", our specially developed media that requires no replacement. Watch the video to learn more.

A Shortcut For Nitrogen Removal A Shortcut For Nitrogen Removal

Interested in sidestream treatment or curious about the innovation known as "shortcut nitrogen removal"? Mudit Gangal, product manager for Ovivo, explains both from the tradeshow floor at WEFTEC 2017. Specifically, Gangal talks about the advantages of the AnammoPAQ system, which is evidenced by a number of successful installations referenced in the video.

Stickney Phosphorus Reactor Lift

Construction of the world’s largest phosphorus recovery facility continues at our Stickney Water Reclamation Plant. On July 22, one of three reactors was lifted, rotated and placed into the building. This time-lapse video shows a portion of the process which required approximately 50 minutes to complete.

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NUTRIENT REMOVAL NEWS

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ABOUT NUTRIENT REMOVAL

 

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.