digester heat recovery Articles

  • Anaerobic Digest

    Wilsonville, Oregon: Food Scraps Digester Proposed An anaerobic digester with capacity to process 50,000 to 70,000 tons/year of commercial food waste is being proposed in Wilsonville by Sustainable Organics Recycling Technology (SORT) Bioenergy. Wilsonville is in the Portland metro area. Currently, a portion of commercial food scraps from the metro area are hauled to the ...


    By BioCycle Magazine

  • Assessing Feasibility of Direct Drive Technology for Energy Recovery from Digester Biogas

    ABSTRACTThe Regional Municipality of Waterloo completed a study, with support from Environment Canada, to evaluate the feasibility of using direct drive technology to recover energy from digester biogas. The study identified that a 150 HP engine, operating at 54 % load, could be supported by the estimated gas production of 1560 m3/d with 63 % methane by volume. ...

  • Maximizing Energy Recovery through Digester Gas Management System Enhancement

    ABSTRACTAdvanced anaerobic digestion practices and maximum energy recovery call for a digester gas system that reliably allows for complete biogas collection and utilization. This paper will describe the planning, design, and construction of a new digester gas management system at the East Bay Municipal Utility District’s (District) Main Wastewater Treatment Plant. The need for an upgraded ...

  • Digester gas - case study

    BV Dairy, of Dorset, is aiming to cut its carbon footprint by more than 65% as a pioneer of liquid Anaerobic Digestion (AD) technology BV Dairy, Shaftsbury, Dorset Established in 1958, BV Dairy processes around 35 million litres of milk per year, sourced from 35 farms located near its site. The product range includes fresh and cultured dairy products for sale to the UK’s ...


    By ENER-G

  • Innovation Key To Biosolids Digestion

    A $400 million project at the Blue Plains Advanced Wastewater Treatment Plant (AWTP) in Washington, D.C., involves building an innovative biosolids management system comprised of a thermal hydrolysis process, four 3.8-million gallon mesophilic digesters (measuring 70-ft tall by 100-ft in diameter) with fixed covers, a cogeneration system consisting of three 4.6-MW Solar Mercu ry 50 gas turbines ...


    By BioCycle Magazine

  • Treatment of wastewater from anaerobic digestion

    The Client The customer is power plant which produces biogas from biomass and sewage farm, through anaerobic digestion and thermal recovery, located nearby Munich in Germany. The Client’s needs Biogas is produced by the fermentation of organic substances of animal and vegetal origin in absence of oxygen (anaerobic process). This process produces a ...

  • 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

  • Post-composting techniques of digested household waste

    Compost making is a method of recycling whereby organic waste is broken down to organic soil with the help of oxygen demanding microorganisms. There are different ways of making compost. Some require more labour and an exact procedure has to be followed; others neglect the precise procedure, which has advantages and disadvantages. Organic material, including toilet waste, can also be recovered to ...


    By Inderscience Publishers

  • The effect of mixing conditions on anaerobic digester performance

    The basic principle of aerobic wastewater treatment is the conversion of some parts of organic matters to biomass and this causes production of excessive sludge in aerobic processes. This excessive sludge is withdrawn from time to time to prevent accumulation of biomass in aeration basin. In most cases, this sludge requires the stabilization before the dewatering and disposal. Different processes ...


    By ORBIT e.V.

  • Digester gas - Stornoway Scotland - case study

    Scottish Island to be the first to utilise Anaerobic Digestion in waste treatment Comhairle nan Eilean Siar Stornoway, Isle of Lewis, Scotland “We were convinced by ENER-G’s ability to install a system that met with our requirements for a facility that is an innovative combination of waste treatments and includes the UK’s first dry Anaerobic Digestion facility” ...


    By ENER-G

  • Digester Developer Taps Natural Gas Markets

    IN the late 1990s, Dan Eastman and two colleagues were researching business opportunities in the renewable energy industry. They were looking for a commercially viable technology that could take renewable energy from an experimental phase to a solid business investment. In 1999, Eastman and his partners founded Microgy, Inc., with its base in Wisconsin. The company licensed the Xergi anaerobic ...


    By BioCycle Magazine

  • Digester gas - countess wear sewage treatment works - case study

    South West Water leads the way with highly efficient biogas combined heat and power Technology, utilising otherwise harmful digester gas. South West Water (SWW) provides clean water and sewerage services to over 1.6 million people, 365 days a year. Dedicated to environment and conservation issues, SWW is committed to using energy efficient Combined Heat and Power (CHP) generation systems. SWW has ...


    By ENER-G

  • Comprehensive review and compilation of pretreatments for mesophilic and thermophilic anaerobic digestion

    Organic matter hydrolysis prior to anaerobic digestion has been shown to improve biogas production (30–50%) and reduce solids (20–60%) by ultrasound, chemical, conventional heating, and microwave pretreatments. Numerous studies have been performed to determine the extent of digestion improvement but few focus on financial feasibility of these processes. A comprehensive model was created using ...


    By IWA Publishing

  • Advanced Digestion Plant at Bran Sands design and construct experiences

    Abstract In June 2007 Northumbrian Water awarded a design and construct contract to Aker Solutions for a new advanced digestion (AD) plant at their Bran Sands site on Teesside. Following laboratory trials, advanced digestion via thermal hydrolysis was identified as the preferred treatment process for the upgrade of Bran Sands Regional Sludge Treatment Centre (RSTC). The plant will treat ...


    By Cambi AS

  • Alkaline treatment of high-solids sludge and its application to anaerobic digestion

    High-solids anaerobic digestion is a promising new process for sludge reduction and bioenergy recovery, requiring smaller digestion tanks and less energy for heating, but a longer digestion time, than traditional low-solids anaerobic digestion. To accelerate this process, alkaline sludge disintegration was tested as a pretreatment method for anaerobic digestion of high-solids sludge. The results ...


    By IWA Publishing

  • The potential for thermal energy recovery from wastewater treatment works in southern England

    This paper asks how much heat could be recovered from wastewater treatment plants under UK climatic conditions, and can this heat be used effectively to reduce their carbon footprint? Four wastewater treatment sites in southern England have been investigated and the available heat quantified. Issues relating to the environmental, economic and practical constraints on how this energy can be ...


    By IWA Publishing

  • Sewage pre-concentration for maximum recovery and reuse at decentralized level

    Pre-concentration of municipal wastewater by chemically enhanced primary treatment (CEPT) was studied under controlled laboratory conditions. Both iron and aluminium-based coagulants were examined at gradually increasing concentrations (0.23, 0.35, 0.70 and 1.05 mmol/L). The CEPT sludge generated from different coagulation experiments was digested in batch anaerobic reactors, while the ...


    By IWA Publishing

  • Energy Recovery Solution from the Wasted Grey Water - Case Study

    Energy Recovery Solution from GREY Wasted Water in Large Condos or Hotels, or in WTP or from City Sewage pipes flowing under the street. The Energy Recover Solutions are Patented Technology with Major Benefits in different markets A practical solution to save ...


    By DDI Heat Exchangers Inc.

  • Columbus, Georgia`s High-Efficiency, Low Cost, Digester-Gas-Fired Power Plant

    ABSTRACTGrowing concern over the cost of power and long-term availability of limited fossil fuel resources for the production of electricity have caused electrical utilities and governments to promote “green” or renewable power. Solar, wind, geothermal, biomass, biogas, and low-impact hydroelectricity are current acceptable green-power sources. Digester gas is a renewable, green energy resource ...

  • Five Years of Successful Operation – A Report on North America’s First New Temperature Phased Anaerobic Digestion System at the Western Lake Superior Sanitary District (WLSSD)

    The Western Lake Superior Sanitary District (WLSSD) is located on the western shore of Lake Superior in Duluth, Minnesota. Five years ago, the WLSSD undertook a major change in its biosolids program, shifting from sludge co-incineration with solid waste to temperature phased anaerobic digestion (TPAD) and land application. The WLSSD wastewater treatment plant treats average flows of 162 million ...

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