small anaerobic digester Articles

  • 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.

  • 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 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

  • The dirty little secret of anaerobic digesters

    First, I want to state that I am a firm believer in the benefits of anaerobic digesters as both technologies to reduce solid wastes, and also as means of creating clean, renewable fuel. With the abundance of animal and vegetable wastes clogging landfills and polluting rivers and aquifers, plus the rising cost of power, the non-use of anaerobic digesters (both as a revenue generator and a cost ...


  • Effect of Secondary Aerobic Digestion on Properties of Anaerobic Digested Biosolids

    ABSTRACTIn this study, the performance of sequential anaerobic-aerobic digestion was compared to conventional anaerobic digestion for sludge from the Blue Plains Advanced Wastewater Treatment Plant. Volatile solids removal, polymer conditioning demand for dewatering, and biosolids odor characteristics following anaerobic digestion and sequential anaerobic-aerobic digestion were monitored. Aerobic ...

  • The Effect of the Microsludgetm Treatment Process on Anaerobic Digestion Performance

    ABSTRACT Thickened waste activated sludge (TWAS) from biological treatment processes is less amenable to anaerobic digestion than primary sludge. This is due to TWAS being composed mostly of cellular material and extracellular polymeric substances (EPS) instead of more easily digestible carbohydrates and fats that are typically found in primary sludge. In an attempt to improve TWAS digestion ...

  • Waste treatment Wernsing Anaerobic Digestion Plant (Germany)

    Wernsing biogas plant Addrup The Wernsing biogas plant was one of the first biogas weser-ems plants to treat waste from food industry since its commission in 2001. Up to 200 tonnes of white cabbage and potatoes waste are used as main input material per day. In addition to the biogas plant, the facilities owned by the Wernsing group include a waste water treatment plant to treat the sewage ...

  • 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 ...

  • Treatment of corn ethanol distillery wastewater using two-stage anaerobic digestion

    In this study the mesophilic two-stage anaerobic digestion (AD) of corn bioethanol distillery wastewater is investigated in laboratory-scale reactors. Two-stage AD technology separates the different sub-processes of the AD in two distinct reactors, enabling the use of optimal conditions for the different microbial consortia involved in the different process phases, and thus allowing for higher ...


    By IWA Publishing

  • Modeling anaerobic digestion of municipal wastewater sludges: an elemental approach

    An experimental study that examined the elemental composition of waste activated sludge as it progressed through mesophilic and thermophilic anaerobic digestion was completed. It was found that the oxygen mass fraction of the VSS increased while the carbon content decreased as digestion progressed. Small differences were observed in the responses observed for mesophilic and thermophilic digestion ...

  • The effect of iron and aluminium for phosphorus removal on anaerobic digestion and organic sulfur generation

    The addition of iron or aluminium into activated sludge basins for phosphorus removal is likely to impact both the efficiency of the anaerobic digestion process and the generation of odor-causing compounds following digestion and dewatering. In this study, the impact of iron and aluminium addition on digestion and odor-causing compounds was investigated by using batch digestion of combined ...


    By IWA Publishing

  • Climate change impacts of food waste diversion to anaerobic digesters

    Treating food waste (FW) by anaerobic digestion to recover biogas and biofertiliser is a fantastic opportunity. The biogas is renewable, base-load, non-fossil energy. Using the digestate on land as biofertiliser completes nutrient cycles and conserves soil organic matter. The Part-503 rules protect health and the environment. Existing sludge digesters can be ‘turbo-charged’ by retrofitting ...


  • Comparative assessment of anaerobic digestion of municipal solid waste at mesophilic and thermophilic temperatures

    Anaerobic digestion is an environmentally sound treatment option for the organic fraction of municipal solid waste (OFMSW) and simultaneously producing methane gas which is a source of renewable energy. The COD reduction of the substrate was 72% for the mesophilic condition and 72.3% for the thermophilic condition. 1200 cm³ of methane was produced in the mesophilic condition and 1260 cm³ in the ...


    By Inderscience Publishers

  • Anaerobic Digesters Heated by Direct Steam Injection: Experience and Lessons Learned

    The City of Crystal Lake (Illinois) municipal wastewater treatment plant (WWTP) employs an anaerobic digester heating system that differentiates itself from most heating systems by using direct steam injection (DSI). This heating system has been in operation for over four years.Selection criterion included: high energy efficiency, small footprint, low maintenance costs and tight temperature ...

  • Feasibility of high solid anaerobic digestion: option for treatment of distillers grains from cassava ethanol production

    This research article mainly focused on the feasibility and management of distillers grains produced from ethanol industries using high solid anaerobic digestion systems. A significant barrier for distillers grains in the anaerobic process are its low pH (3.80–4.16) and high C/N ratio (37/1–42/1). According to distillers grains characteristics, the stillage investigated was in dry form (TS 23% to ...


    By Inderscience Publishers

  • Effect of temperature on composting residual Organic Fraction of Municipal Solid Waste (OFMSW) after anaerobic digestion

    Aerobic composting is generally considered as a necessary post-treatment for residual solids after anaerobic digestion. This study aimed to determine the effects of temperature on biodegradation, microbial population density in composting residual OFMSW after anaerobic digestion. Four composting runs at different set temperatures were conducted. The rate of ...


    By Inderscience Publishers

  • Novel anaerobic digestion process with sludge ozonation for economically feasible power production from biogas

    A novel process scheme was developed to achieve economically feasible energy recovery from anaerobic digestion. The new process scheme employs a hybrid configuration of mesophilic and thermophilic anaerobic digestion with sludge ozonation: the ozonated sludge is first degraded in a thermophilic digester and then further degraded in a mesophilic digester. In small-scale pilot experiments of the ...


    By IWA Publishing

  • Temperature–dependent polylactic acid (PLA) anaerobic biodegradability

    Polylactic acid (PLA) biodegradability is mostly claimed according to PLA biodegradation behaviour under aerobic composting conditions. However, waste materials containing PLA are frequently disposed of in municipal landfills, which are operated anaerobically. PLA anaerobic sludge digestion results are acquired to elucidate effects of the degrading temperature on PLA biodegradation. When the ...


    By Inderscience Publishers

  • Co-digestion - Processes, potentials and organization Forms

    Co-digestion of organic wastes together with livestock manure has received growing interest in Germany during the last 5 years because some waste acts have been changed in order to achieve a better protection of the environment and to promote the utilisation of wastes for the formation of renewable energy and secondary products which can substitute mineral fertilisers and conventional soil ...


    By ORBIT e.V.

  • Solid Waste District Pilots Dry Fermentation Digester

    Special events, restaurants and other commercial businesses in the Monterey region of California have found a way to close the compostable waste loop and produce usable electricity at the same time. The electricity is produced via dry fermentation anaerobic digestion (AD) units that came online this spring at the Monterey Regional Waste Management District (MRWMD) in Marina. The pilot AD ...


    By BioCycle Magazine

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