anaerobic digester operation Articles

  • Anaerobic Digest

    Boulder, Colorado: U.S. Distributed Renewables Forecast Published Navigant Research, a market research and consulting firm in Boulder, recently published the “U.S. Distributed Renewables Deployment Forecast, 2016-2025.” The report notes that deployment of distributed renewables, such as wind, solar and anaerobic digestion facilities, in the U.S. has accelerated in the last ...


    By BioCycle Magazine

  • 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

  • Operational Experience of Advanced Anaerobic Digestion

    Abstract Anaerobic processes have been used in wastewater treatment systems for more than a century. Initially they were used to stabilise the solids produced, and generally consisted of simple concrete tanks in which the solids were placed as thin slurry and allowed to decompose anaerobically. However, using advanced pre-treatment processes in conjunction with traditional anaerobic ...


  • Golf and a Small Anaerobic Digester

    Golf course associations and golf clubs around the world are looking at ways to improve the sport’s environmental criteria.  Sustainable developments and low carbon footprint operations are the name of the game.  As golf courses use fertiliser for the courses, power for the maintenance machinery, and power for the golf carts, there are many areas where sustainability of the sport ...


    By SEaB Energy Ltd.

  • Advances in Thermophilic Anaerobic Digestion

    ABSTRACTSignificant advances have been made in the knowledge base and practical options for improving thermophilic anaerobic digestion over the past 10 to 15 years. Today, more options exist that promise to enhance the degree of stabilization achieved and finished product quality in new and retrofitted existing processes. In parallel, the body of knowledge regarding pathogen inactivation in these ...

  • Startup of Anaerobic Mesophilic Digesters

    Many operators have started up mesophilic digesters, but everyone has differing stories and experiences. This paper is a combination of the startup of several mesophilic anaerobic digesters, with very low seeding to fully seeded conditions. Upper Occoquan Sewage Authority (UOSA) operates the Millard H. Robbins Water Reclamation Plant. UOSA started three anaerobic digesters between August 2000 and ...

  • Anaerobic digestion of aliphatic polyesters

    Anaerobic processes for the treatment of plastic materials waste represent versatile and effective approach in environmental protection and solid waste management. In this work, anaerobic biodegradability of model aliphatic polyesters, poly(L-lactic acid) (PLA), and poly(ɛ-caprolactone) (PCL), in the form of powder and melt-pressed films with varying molar mass, was studied. Biogas production ...


    By IWA Publishing

  • Anaerobic digestion in the United Kingdom

    Anaerobic digestion (AD) has been used to treat sewage sludge by the United Kingdom’s (UK) water industry for over 100 years. More recent years have seen a revolution as AD has swiftly expanded into agricultural feedstocks and food waste. Data from the Waste Resource and Action Programme (WRAP) shows that in the past year alone, there has been a 46 percent growth in the size of the sector. ...


    By BioCycle Magazine

  • Assessing the Market for Anaerobic Digestion

    The anaerobic digestion (AD) industry is growing rapidly. In the UK there are over 215 anaerobic digesters in operation and more than 100 in planning. Understanding how a market will develop is crucial to any successful venture. A client came to us looking to improve their understanding of the current status and future potential of the AD market in the UK and Ireland. In order to progress ...


    By NNFCC

  • Anaerobic Digestion—What Are the Economics?

    Although solid waste AD facilities are just starting to emerge, haulers and their customers may see some benefits if the development trend continues. A Pro Forma Model objective can be constructed for strategic planning of an anaerobic digestion facility. Anaerobic digestion (AD) of food wastes in the U.S. is a developing market that is poised for continued growth in many regions. ...


    By Waste Advantage Magazine

  • CH#1138 - Anaerobic Digesters

    Waste Type: Fats, oils and grease (FOG) in Anaerobic Digesters Problem: FOG waste poses a challenge for most municipal wastewater collection systems and treatment plants. Although fats, oils and grease will biodegrade in an anaerobic digester, high concentrations will tend to 'mat' on the sludge surface, lowering digestion efficiency. This Midwestern municipal facility was no different. The 1.5 ...


    By Bio-Systems International

  • Design and Operational Considerations to Avoid Excessive Anaerobic Digester Foaming

    Excessive foaming in anaerobic digesters has been a problem for many years. All anaerobic digesters will foam to some extent, but excessive foam can be problematic. Excessive foaming is defined as foam that interferes with flow through the gas piping system and/or is not contained within the digester. Causes of foaming include presence of excessive filamentous bacteria, extreme amounts of oils ...

  • Implications of full-scale implementation of an anammox-based process as post-treatment of a municipal anaerobic sludge digester operated with co-digestion

    The feasibility of treating the supernatant of a municipal sludge digester supplemented with co-substrates by means of an anammox-based process (ELAN®) was tested in Guillarei (NW of Spain). Ammonia concentration measured in the supernatant of the sludge digester varied in the range 800–1,500 g N/m3 due to the fact that the sludge produced in the plant was co-digested with ...


    By IWA Publishing

  • Restoration of Active Anaerobic Digestion in Charleston, West Virginia

    The upgrade to the Charleston, West Virginia wastewater treatment plant is a 50-million dollar project that is being conducted in two phases. The first phase of the project included specific unit processes at the plant that were failing or causing significant operational impairments. This first phase included the emergency renovation of four (4) existing anaerobic digesters that at the onset of ...

  • Steam injection heating of biosolids & sludge for Anaerobic Digestion

    The article focuses on the integration of Direct Steam Injection (DSI) heating as a method for heating of Municapal, Industrial, Food, & Agricultural wastewater streams. Common applications are anerobic digestion, biogas production, waste de-activation, and FOG (Fats-Oils-Grease) heating. Topics covered include how DSI works, how to select a DSI heater suitable for viscous & difficult to ...


    By ProSonix LLC

  • Toronto moves forward with anaerobic digestion of residential SSO

    In June 2007, Toronto's City Council approved the “Target 70” plan to achieve 70 percent diversion by 2010. Target 70 includes construction of two, 55,000 metric tons/year anaerobic digestion plants to process residential source separated organics (SSO). City Council says that the digester facilities, along with adoption of single stream recycling and a pay-as-you-throw funding system, will ...


    By BioCycle Magazine

  • Anaerobic digestion plant in East Malaysia - Unique Solutions

    BIODOME ASIA has completed a state-of-the-art anaerobic digestion plant in East Malaysia for our client Kubota Corporation. The biogas plant will be owned by BBC Biogas Sdn Bhd, a subsidiary of BBC Holdings Sdn Bhd, based in Bintulu. BIODOME ASIA have designed, supplied and constructed a 10,000m³ glass-fused-to-steel digester tank complete with a BIODOME Double Membrane Gas Holder Roof and a ...

  • Foaming during anaerobic digestion: Causes and Solutions

    Foaming during sludge treatment has traditionally been associated with activated sludge systems which have been victim to this phenomenon for several decades. However, foaming has been documented in anaerobic digestion plants, leading, fundamentally, to a reduction in digester capacity and an increase in operational expenditure. The requirements for foaming of: surface active agents, gaseous ...


    By United Utilities

  • Combined experiences of thermal hydrolysis and anaerobic digestion

    The basic principles of batch thermal hydrolysis process (THP) are well known and have been put into full practice in 20 plants around the world. This paper reviews the historical development of the process and the latest thinking on the application of THP from a number of sources in Europe. An independent investigation of the vendors claims support the data for the benefits claimed to date. The ...


    By Cambi Group AS

  • Installation of Radar Level Instruments in Anaerobic Digesters

    ABSTRACTThere are numerous well-proven options available for level determination instrumentation. Instrumenting treatment processes present some unique challenges. Some of these include the ability for wastewater or residuals to clog and blind instruments. Level determination in an anaerobic digester presents these problems as well as others including foaming, surface agitation, and operation in ...

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