biological nutrient recovery Articles

  • Nutrient Recovery by Struvite Crystallization Process: Virginia Experience

     ABSTRACT The Hampton Roads Sanitation District's (HRSD), Nansemond Treatment plant (NTP) services the cities of Chesapeake, Portsmouth and Suffolk, Virginia. The plants treated effluent is discharged into the Chesapeake Bay watershed. The NTP was designed as a 30 MGD biological nutrient removal (BNR) plant with seasonal nitrification and utilizes anaerobic digestion for solids ...

  • High-Level Biological Phosphorus Removal Failure and Recovery

    ABSTRACTThe Durham Advanced Waste Treatment Facility AWTF treats wastewater to very low phosphorus levels (median effluent of less than 0.1 mg P/L) using a combination of biological phosphorus removal followed by tertiary treatment with alum. Historically, the biological phosphorus removal process has shown a relatively high level of instability. Testing was done during summer 2005 to determine ...

  • Three years of operation of North America's first nutrient recovery facility

    The first full-scale nutrient recovery installation in North America became operational in May 2009 at the Clean Water Service's Durham Advanced Wastewater Treatment Plant in Tigard, Oregon. Recovering ammonia and phosphorus from the dewatering side stream as struvite has a positive impact on plant operations. Significantly reducing the phosphorus recycle lowers the phosphorus loading on ...


    By IWA Publishing

  • What is energy recovery?

    Processes like incineration and anaerobic digestion not only provide sources of energy, but they also reduce waste volume The term “energy recovery” often is applied only to a narrow number of methods for converting wastes into energy, when in fact it applies to a broad range of technologies used to create heat, electricity, or fuel. Energy recovery gives ...


    By Fluence Corporation

  • Power Positive Resource Recovery

    Using laws of thermodynamic analysis to evaluate the energy and power characteristics of wastewater and beneficial uses of biogas offers greater insight into best business practices and what is achievable. Growing numbers of waste-water treatment plants (WWTP) are striving to produce more power onsite. In recent years, there’s even been a race among WWTP operators to see who can ...


    By BioCycle Magazine

  • Acetic acid recovery from a hybrid biological–hydrothermal treatment process of sewage sludge – a pilot plant study

    A two-stage process consisting of anaerobic fermentation followed by sub-critical wet oxidation was used to generate acetic acid from sewage sludge at pilot scale. Volatile fatty acids, dominated by propionic acid, were produced over 4–6 days in the 2,000 L fermentation reactor, which also achieved 31% solids reduction. Approximately 96% of the carbon was retained in ...


    By IWA Publishing

  • Effect of side-stream phosphorus recovery on biological phosphorus removal performance investigated by chemical and microbial analyses in a novel BNR-IC process

    The aim of this study was to assess the effect of side-stream ratio (SSR) on performance of phosphorus (P) removal and recovery in a novel process linking biological nutrients removal (BNR) and induced crystallization (IC). Results showed that P removal efficiency was significantly enhanced when given an appropriate SSR, resulting in effluent P concentrations decreasing from 0.75 to 0.39 mg/L ...


    By IWA Publishing

  • Phosphate recovery at Schiphol - Case Study

    Sustainable Airport Cities Schiphol's water cycle is comparable to that of a small city. The location therefore provides a good context for a pilot project with the sustainable recovery and reuse of phosphate. Removal of phosphate from wastewater from the airport and the aircraft will ...


    By Nutrient Platform

  • Role of primary sedimentation on plant-wide energy recovery and carbon footprint

    The goal of this paper is to show the effect of primary sedimentation on the chemical oxygen demand (COD) and solids fractionation and consequently on the carbonaceous and energy footprints of wastewater treatment processes. Using a simple rational procedure for COD and solids fraction quantification, we quantify the effects of varying fractions on CO2 and CO2-equivalent mass flows, ...


    By IWA Publishing

  • Development and Application of Biological H2S Scrubbers for Treatment of Digester Gas

    ABSTRACTAs part of the California Energy Group (Former California Energy Commission) Public Interest Energy Research (PIER) Program, biological hydrogen sulfide (H2S) biogas cleaning was evaluated. The biological H2S scrubber uses bacteria to oxidize the sulfide to produce both elementary sulfur and sulfuric acid. This system was tested at the Inland Empire Utilities Agency’s Regional Plant 1 ...

  • Nitrogen Recovery from Sewage Sludge - Case Study

    Ammonium Sulphate from process air The air with which the compost from sludge processor GMB BioEnergie is aerated in the biological drying tunnels contains a lot of ammonia. The emission of this ammonia-rich air led to odor complaints in the past. Now we see this air as a source of nutrients. We pass the air through an air scrubber with sulfuric acid. This sulfuric acid binds the ammoniacal ...


    By Nutrient Platform

  • Perspectives on organic waste recovery relative to composting and anaerobic digestion

    Generally speaking, organic waste renders its self suitable for recovery purposes owing to the nutrient elements it contains and the energy stored in the biochemical bonds of its constituent organic compounds. Both composting and anaerobic digestion (AD) have been used since a long time ago in reclaiming organic material. It seems that the first modern composting process was developed in 1920s in ...


    By ORBIT e.V.

  • Perspectives on organic waste recovery relative to composting and anaerobic digestion

    Generally speaking, organic waste renders its self suitable for recovery purposes owing to the nutrient elements it contains and the energy stored in the biochemical bonds of its constituent organic compounds. Both composting and anaerobic digestion (AD) have been used since a long time ago in reclaiming organic material. It seems that the first modern composting process was developed in 1920s in ...


    By ORBIT e.V.

  • Becoming A “Water Resource Recovery Facility” Offers Financial Benefit

    While the term “Water Resource Recovery Facility” may seem like nothing more than a trendy phrase, the name change represents a distinct shift in the role that wastewater utilities can now play. Wastewater is packed full of resources — nutrients, micronutrients, metals, grit, biopolymers, biosolids, and more — and much of that can be recovered and sold, offering additional ...


    By KLa Systems, Inc.

  • Production and recovery of poly-β-hydroxybutyrate from whey degradation by azotobacter

    Poly-β hydroxyl-butyrate, (PHB) is a biodegradable thermoplastic which can be extracted from a wide range of bacteria. PHB belongs to the class of bacterial polyesters collectively called polyhydroxyalkanoates, (PHAs). PHAs have properties similar to polypropylene and are important due to their complete biodegradability, with recognised potential applications in reducing disposable waste ...


    By University of Tehran

  • The effect of heavy metals on the activated sludge process and its microbial community analysis using 16S ribosomal DNA

    The effect of heavy metal shock loading on biological treatment systems was studied by traditional methods and molecular biological techniques. Two kinds of SBR (sequence batch reactor) operation units, unacclimated and acclimated activated sludge systems, were studied. The addition of special nutrients and powdered activated carbon (PAC) to stimulate heavy metal uptake and recovery were studied. ...


    By Inderscience Publishers

  • Comparison of anaerobic treatment alternatives for brandy distillery process water

    ABSTRACTThis paper compares the conceptual design of anaerobic treatment alternatives for brandy distillery process water from the production of wine, brandy, high proof alcohol, and cleanup activities that will be land applied. The results of process water characterization and treatability testing are included. The wine industry's sustainable practices movement and recent tightening of the ...


    By IWA Publishing

  • Potential contribution of the wastewater sector to energy supply

    The biological treatment of wastewater could yield high energy fuels such as methane and alcohols, however most conventional treatment systems do not recover this energy potential. With a simple model of the energy yields of various wastewater treatment technologies it is possible to demonstrate how minor shifts in technology selection can lead the industry from being identified as predominantly ...


    By IWA Publishing

  • Gasoline pipeline break - Sun Pipeline Company

    LOCATION: Southeastern, PennsylvaniaPROJECT DATE:  November, 1984 to October, 1991CLIENT:  Sun Pipe Line Company BACKGROUND: A pipeline break resulted in the spill of 100,000 gallons of gasoline to a highly fractured shale aquifer. A number of private drinking water wells were affected. In excess of 10 homeowners were forced to vacate due to gasoline vapors in their homes. Producing ...


    By Terra Systems, Inc. (TSI)

  • Secondary Clarifiers Modification Cost of $0.6-Million Achieves $36-Million Cost Savings for Calgary’s 500 Ml/D Bonnybrook BNR WWTP

    At the 500 ML/d Bonnybrook Wastewater Treatment Plant, Secondary B, consisting of activated sludge reactors 5 - 8, underwent a major retrofit to the biological nutrient removal technology in 1997. Subsequently, a full-scale study was undertaken in February 2000 to determine Reactor 5’s treatment capacity during Calgary’s winter months. The study indicated Reactor 5’s treatment capacity had to be ...

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