agricultural digester Articles

  • Introduction of composted digestates in agriculture

    Municipal organic waste is increasingly recycled by aerobic composting or anaerobic digestion procedures. In 1997, 230 000 Mg organic waste were composted and used for agriculture in the region of Cologne, which is an increase by 70% compared to 1994 (Anonymous, 1999). Therefore, the effects of compost on the soil and the plants require studies on:- its nutrient contents to contribute to the ...


    By ORBIT e.V.

  • Farm digester evolution in Vermont

    In the fall of 2012, Brian Jones of Joneslan Farm in Hyde Park, Vermont spread the first load of manure that had gone through the farm’s new anaerobic digester. “It didn’t smell at all,” recalls Jones. “And we’ve been told that the nitrogen in the digested manure is more available to the plants we grow.” When the Joneslan Farm digester went on line in ...


    By BioCycle Magazine

  • Farm digester progress in Pennsylvania

    The Commonwealth of Pennsylvania is home to about 7,000 dairy farms with an average herd size of less than 100 cows. While nutrient and odor management are of great importance to these farms, their overall economic viability appears to be the primary factor driving installation of anaerobic digesters over the past few years. “Pennsylvania has 30 dairy digesters and about 5 swine digesters ...


    By BioCycle Magazine

  • Financing an anaerobic digester

    LENDERS are generally well disposed to projects that diversify revenues while lowering costs and mitigating risks. Add a ready source of equity and you are well on the way toward financing a project that is a win-win proposition for the lender and the project developer. Such is the case with the anaerobic digester project at Geerlings Hillside Farm (GHF). The Geerlings's 8,000-head hog farm is ...


    By BioCycle Magazine

  • Adding Value To On-Farm Digesters

    ANAEROBIC digestion of dairy manure and food processing residuals in Michigan is not a new undertaking. Over the years, 11 farm digesters were constructed in the state, of which four are still operational, reports Michelle Crook of the Michigan Department of Agriculture in a presentation in the spring of 2007. “Three of the operating digesters are for livestock manure and one is for food ...


    By BioCycle Magazine

  • Latest Progress in Anaerobic Digestion

    Compared to countries like Germany and Denmark, the United States and Canada have a long way to go in creating the fundamental policy incentives and regulatory mandates that will encourage market development for anaerobic digestion (AD). Someone recently asked me how many years it would take to deploy AD systems on farms in North America that are large enough to economically use them. Given ...


    By BioCycle Magazine

  • Optimization of the thermophilic anaerobic co-digestion of pig manure, agriculture waste and inorganic additive through specific methanogenic activity

    The anaerobic co-digestion of three wastes (manure, rice straw and clay residue, an inorganic additive) at different concentration levels and their interactive effects on methanogenic activity were investigated in this work at thermophilic conditions in order to enhance hydrolytic activity and methane production. A central composite design and the response surface methodology were applied for ...


    By IWA Publishing

  • Environmental assessment of energy production by combustion of biogas provided by the anaerobic digestion of agricultural biomass

    This paper tries to compare the environmental impacts of energy production using agricultural biomass and energy production using traditional reactor systems (natural gas and fuel oil) by using the Life Cycle Assessment (LCA) methodology. In order to make this comparison, the impact assessment methods CML 2 BASELINE 2000 (problem oriented method) and ECOINDICATOR 99 (damage oriented method) are ...


    By Inderscience Publishers

  • Farm digesters for small dairies in Vermont

    THROUGH its award-winning Cow Power program, Central Vermont Public Service (CVPS), a Vermont utility headquartered in the city of Rutland, is helping dairy farmers diversify their incomes by turning manure into electricity. The farmers process manure in anaerobic digesters to generate power, which CVPS customers voluntarily pay a premium to purchase. In addition to income from electricity sales, ...


    By BioCycle Magazine

  • The CAMBI process and agriculture, a sustainable solution?

    Abstract Both public acceptance and interest from farmers for spreading biosolids from waste water treatment plants (wwpt) on arable land, are dependent on some fundamental criteria. These criteria are, however, quite straightforward. The biosolids should be safe, easy to handle, a well documented source of plant nutrition, without disagreeable odours and easily available. A big part of the ...


    By Cambi Group AS

  • Digested Dairy Manure To High-End Potting Soil

    Robert Joblin and Ted Sniegocki of Cenergy USA based in Little Rock, Arkansas, are not horticulturalists or agronomists. But they are anaerobic digester developers and when falling rates for renewable energy and the loss of the federal Investment Tax Credit grant hit at the same time, the financial models they had been using “fell down.” The need for additional revenue streams for AD ...


    By BioCycle Magazine

  • BioKW (A) Agricultural Plant - Case Study

    Digester: 2 x 1.380 m³/h, 2 x 500 kWel; 1 x 1.000 kWth Manure, fruit- and vegetable waste, energy crops, fat sludge, slaughter house waste, food leftovers Scope of delivery: permission planning, detailed planing, tendering, project awarding, project management supervision, mixing technology, gas handling equipment, instrumentation Start-up: ...

  • Pfiel (A) Agricultural Plant - Case Study

    Digester: 2 x 2.000 m³ pig manure, energy crops 2 x 500 kWel scope of delivery: permit application, detailed design, tendering, project awarding, project management supervision, agitator equipment, un-pressurized gas holder, tent-roof gas holder, gas handling equipment, instrumentation Start-up: ...

  • Jezera (SLO) Agricultural Plant - Case Study

    Digester: 3.250 m³ pig manure, energy crops 1.000 kWel scope of delivery:  detailed design, agitators, input technology,  gas handling equipment, instrumentation, plant start-up Start-up: ...

  • Eridania (ITA) Agricultural Plant - Case Study

    Digester: 3.250 m³ beet chips, corn 1 x 999 kWel scope of delivery:  detailed design, agitators, gas handling equipment, instrumentation, control, plant start-up Start-up: ...

  • Livorno Ferraris (ITA) Agricultural Plant - Case Study

    Digester: 2 x 3.250 m³ pig manure, energy crops 2 x 999 kWel scope of delivery:  detailed design, agitators, gas handling equipment, instrumentation, control, plant start-up Start-up: ...

  • Case study - Guangdong Academy of Agricultural Sciences (GDAAS)

    There are 13 research institutes under the GDAAS, including specific foods and crops and fertilizer research. The main mission of the institution is to carry out non-profit research around agricultural science and techniques.  As one of the most important agricultural crops institutions, the Crops Research Institute has been focusing on the development of new varieties of crops, cultivation ...


    By Geotech

  • Agricultural Residuals Drive Producer-Owned Energy

    Farmer-owned renewable energy enterprises are increasing rapidly — with alternative fuels such as biodiesel, ethanol and distiller’s grains becoming mainstream. MINNESOTA is home to 16 ethanol plants generating approximately 550 million gallons per year. Most of these new facilities are producer-owned. Many others are under construction or are in the planning process. In 2005, Minnesota farmers ...


    By BioCycle Magazine

  • New manure digester generates heat at World Dairy Expo

    For anyone visiting the World Dairy Expo, there can be a lot to digest. The world's largest dairy trade show begins Tuesday at Alliant Energy Center. Around 65,000 people are expected to attend. There are 752 companies and organizations exhibiting and there will be approximately 3,000 cows on the grounds. There will be 14 cattle shows, eight virtual farm tours and the Badger Dairy Club ...


    By Himark bioGas Inc

  • Industry Takes Shape: Why Digesters Make Dollar Sense Now

     THIRTY years ago, when I was a college student studying ways to convert manure to electricity, we speculated that the 1970s would be the decade of the innovators, the 1980s for the launch of operating projects, and the 1990s when the mainstream adopted the technology. Now I think our predictions for the mainstream were ten to 15 years premature — but it is happening! During the 1990s, the ...


    By BioCycle Magazine

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