biogas digester model Articles

  • Velocity gradient as a tool to characterise the link between mixing and biogas production in anaerobic waste digesters

    Whilst the importance of mixing in anaerobic digesters to enhance process performance and gas production is well recognised, the specific effects of mixing regime on biogas production are not clear. Here, the velocity gradient is used to demonstrate the importance of minimally mixed zones in a digester, with computational fluid dynamics (CFD) models indicating that 20–85% of a ...


    By IWA Publishing

  • "Four in one" model and the development of household biogas in northern China

    By reviewing the development of household biogas in China, one of the key factors which impeded the use of biogas in northern China was noted - how a biogas digester lives through the winter. In order to solve this problem, a model named "Four in one" has been proposed by some researchers. In this paper, this model, including its structure, technical features, and benefit was introduced and ...


    By Inderscience Publishers

  • AD and Biogas Technology Developments in UK

    The anaerobic Digestion and Biogas Association’s fourth annual trade show and conference — UK AD & Biogas 2013 — attracted a busy stream of visitors to Birmingham, England in early July, demonstrating a growing interest in this vibrant industry sector. The event included facility tours, conference sessions, workshops, free one-on-one consultations with industry experts, ...


    By BioCycle Magazine

  • What`s New? Biogas Power

    Technologies that connect the biogas line to the power line include cooling and clean up components, microturbines and reciprocating gas engines and control systems. TOP BILLING on the biogas to electricity stage typically goes to the microturbines and reciprocating gas engines. But in the theater of renewable energy from organics recycling, the show can’t go on without the supporting cast of gas ...


    By BioCycle Magazine

  • Increasing biogas yield through addition of food waste

    1. Introduction The Moosburg wastewater treatment plant has one 634,008 gallons anaerobic digester, which was designed to process a maximum 23,775 gallons/day of activated sludge at 3.5% solids. The AD is currently processing 17,170 gallons/day of sludge and producing 39decatherms/day of energy from biogas. The operators would like to better utilize their anaerobic ...


    By Yield Biogas Solutions

  • Microturbines, Gas Engines Link Biogas to the Grid

    OPPORTUNITIES to produce electricity from methane are being improved continuously as manufacturers introduce new and upgraded equipment to address market needs and varying characteristics of raw biogas. In the renewable energy from organics recycling arena, the two primary types of electricity generation equipment are microturbines and reciprocating gas engines. This article provides a brief ...


    By BioCycle Magazine

  • Case study - Geotech’s portable and fixed biogas monitors give worldwide reliability

    Used in varied biogas applications in over 60 countries worldwide, these three examples from the Netherlands, Thailand and Czech Republic show how reliability, accuracy and simplicity of use are critical for Geotech’s anaerobic digestion (AD) customers’ business operations. Leading product quality is backed up by full after-sales care, through local support centres and full technical ...


    By Geotech

  • Coupling ASM3 and ADM1 for wastewater treatment process optimisation and biogas production in a developing country: case-study Surat, India

    The overall performance of the Anjana wastewater treatment plant (WWTP) located in Surat, India, was assessed by coupling the Activated Sludge Model No. 3 (ASM3) and the Anaerobic Digestion Model No. 1 (ADM1). Guidelines developed by the Dutch Foundation for Applied Water Research (STOWA) were successfully applied for the determination of wastewater characteristics. Concerning the fractionation ...


    By IWA Publishing

  • Biomethane production at Ontario wastewater treatment plant

    The City of Hamilton is purifying biogas and injecting it into the grid, while continuing to generate power and recover heat from its CHP system. Hamilton, Ontario, has long been a leader in producing biogas from its sewage and storm water wastes. Half a century ago, the city of 520,000 began processing sludge from its sprawling Woodward Avenue Wastewater Treatment Plant through anaerobic ...


    By BioCycle Magazine

  • Dreyer & Bosse deliver renewable energy CHP project to Sofia in Bulgaria

    The Sofia council decided to invest in renewable energy to make use of the many tons of biowaste (vegetative material),  20,000 tons per annum, from the waste removal collections that take place daily in Sofia and surrounding area. To make this possible it was decided to go for wet fermentation where the substrate or raw material ferments and the biogas is collected. After three weeks the ...


    By Wolf Power Systems GmbH

  • What The AD Industry Can Learn From Solar Standardization

    Applying a proven project finance model to the anaerobic digestion industry is the best way to ensure projects get built and operate profitably over the long-term. THE U.S. anaerobic digestion (AD) market represents an attractive, multibillion dollar investment opportunity. However, structural industry obstacles must be overcome before the market can realize its full potential. As a ...


    By BioCycle Magazine

  • ENER-G shows how going green keeps business finances in the black

    Austerity is good for business at energy management and clean technology business ENER-G At a time when businesses are hanging onto the pennies and reluctant to borrow, ENER-G is providing cash strapped organisations with free energy saving technologies - paid for via tomorrow's energy savings. This is a win-win business model ...


    By ENER-G

  • Greenhouse packs a power punch

    Closed loop system utilizes gasification, algae ponds and anaerobic digestion to convert wood waste to a variety of products, including biofuel, biogas and a soil amendment. MICHAEL Smith is supervising the first commercial-scale Green Power House at the F.H. Stoltze Land and Lumber Co. near Columbia Falls, Montana. Smith, a physicist, has designed a system to take waste products and turn them ...


    By BioCycle Magazine

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