biogas mixing Articles

  • Biogas in Asia

    The development of biogas production and monitoring has had many twists and turns, from its early days in Germany to the heady days of support through the Clean Development Mechanism (CDM).   The fall in the price of carbon credits, which rewarded reduction in emissions of methane (CH4) - a potent greenhouse gas - and use of methane from waste as renewable energy, has hit Asia ...


    By Geotech

  • Focus on Biogas Plants

    To meet the domestic fuel and bio-fertilizer needs, 3,680 biogas plants are planned to be set up in rural areas by June 2012, according to Pakistan Centre for Renewable Technologies. The Centre says that over 2,100 family-size biogas plants — against the target of 2,500 — have already been set up throughout the country. The programme, supported by NGOs, farmers’ bodies and the ...


    By Himark bioGas Inc

  • 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

  • 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

  • Biogas-to-biomethane upgrading plant

    Chesterfield BioGas (CBG) supplied the UK’s first biogas upgrading plant to produce clean biomethane for direct injection into the national gas grid for use by all consumers. The project was successfully completed and gas injected into the national grid at the wastewater treatment site of Thames Water site at Didcot, Oxfordshire in October 2010. This achievement was a benchmark moment for ...

  • Electric Utilities Hook up To Biogas

    Pennsylvania Power & Light, Alliant Energy, Wisconsin Electric and Portland General Electric are some utilities that are plugging into anaerobic digestion projects. AT the October, 2001 BioCycle conference on “Renewable Energy from Organics Recycling,” the director of the Iowa Energy Center, Floyd Barwig, pointed out that the possibility of separating the United States from Middle ...


  • Ethanol by-product raises biogas output

    In 2007, the City of Fergus Falls, Minnesota undertook a study to evaluate adding thick corn stillage to the anaerobic digesters at its wastewater treatment plant (WWTP). The goal was to determine the potential for codigesting syrup with biosolids to increase biogas production, while avoiding operational and regulatory problems. The Fergus Falls WWTP operates three digesters in series, two ...


    By BioCycle Magazine

  • High Performance Biogas Plants for Organic Waste Diversion

    Rising energy prices and low cost feedstock offer the right mix for a profitable biogas plant. The additional income from energy production and the reduction of odorous emissions are just some of the ...


    By Eisenmann

  • 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.

  • Algae biomass cultivation in nitrogen rich biogas digestate

    Because microalgae are known for quick biomass growth and nutrient uptake, there has been much interest in their use in research on wastewater treatment methods. While many studies have concentrated on the algal treatment of wastewaters with low to medium ammonium concentrations, there are several liquid waste streams with high ammonium concentrations that microalgae could potentially treat. ...


    By IWA Publishing

  • Case study - Biogas monitoring for upgraded biomethane

    By working with a range of partners worldwide, Geotech is involved in a range of projects at the cutting edge of biogas production and processing.  The recent landmark deal agreed between Marks & Spencer (M&S) and Future Biogas, a major biogas plant operator, is for the purchase of biomethane certificates. The deal sees M&S purchase 35,000 Mega-Watt hours (Mwh) of certificates, ...


    By Geotech

  • 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 Energy Inc.

  • BiogenGreenfinch fine-tunes biogas monitoring with AEMS

    As BiogenGreenfinch builds its next, much larger and first, second-generation anaerobic digestion (AD) facility at Westwood in Northamptonshire, it is making good use of everything it has learned from the construction and operation of its pioneering, commercial food waste AD plant at Twinwoods, Bedfordshire and the new technology now available. For BiogenGreenfinch the key to successful AD ...


    By Geotech

  • Biogas Check for biomethanol production case study

    Application Research into biomethanol production Equipment Biogas Check - now superseded by the BIOGAS 5000 Location Vietnam Customer Ho Chi Minh City University of ...


    By Geotech

  • Digester Developers Target Mixed Organic Waste Streams

     emerging group of commercial companies see a viable business opportunity in North America around building, owning and operating larger scale anaerobic digestion (AD) facilities to process mixed organic waste streams. In some instances, the projects being proposed and constructed only include anaerobic digester operations. In others, there is a combination of digestion with back-end ...


    By BioCycle Magazine

  • High-strength wastes boost biogas production

    Water and wastewater treatment plants (WWTP) are significant consumers of energy. The U.S. Environmental Protection Agency estimates the industry uses the equivalent of 56 billion kilowatt hours (kWh) of electricity, representing three percent of the nation’s energy consumption, and is responsible for creating 45 million tons of greenhouse gas emissions each year. Energy intensive processes, such ...


    By BioCycle Magazine

  • 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

  • Chopper Pumps: Pumping and mixing of fat from poultry processing plant

    Fats were seprated from the effluent at a poultry processing plant and stored in a reception pit. From there, they had to be pumped to a tanker truck and transported to a biogas plant every time the pit was full. The pit was 3 m deep with a diameter of 3 meters, total volume 22 m³. The fats formed a thick top layer and needed to be mixed efficiently before they could be pumped into the tanker. A ...


    By Landia

  • Anaerobic digestion foaming in full-scale biogas plants: a survey on causes and solutions

    Anaerobic digestion foaming is a common operation problem in biogas plants with negative impacts on the biogas plants economy and environment. A survey of 16 Danish full-scale biogas plants on foaming problems revealed that most of them had experienced foaming in their processes up to three times per year. Foaming incidents often lasted from one day to three weeks, causing 20–50% ...


    By IWA Publishing

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