agricultural anaerobic digestion Articles

  • Root vegetables harvest and farm development

    Root vegetables season The autumn start is the time when vegetable producers have a lot of work. A collection of vegetables begins. Tension and nerves are often associated with it. All because the priority for farmers is to collect crops for which they worked hard all year round. It is important to make a good choice and select the machines suitable to your needs and four farm ...


    By Weremczuk Agromachines

  • 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.

  • Recovery of ammonium from digestate as fertilizer

    Ammonia inhibition can be a major problem during anaerobic digestion of manure and municipal and industrial sludges. Anaerobic digestion is sensitive to higher NH3-N concentrations, which are inhibiting and at certain levels even toxic for methanogen bacteria. The Nijhuis Ammonium Recovery (AECO-NAR) system can solve this problem and removes ammonium from digestate or other substrate for ...


    By IWA Publishing

  • Optimum organic loading rate for semi-continuous operation of an anaerobic process for biogas production from Jatropha curcas seed cake

    This paper reports on biogas production by anaerobic digestion of Jatropha curcas seed cake in semi continuous flow at 30°C, focusing on increasing the organic loading rate (OLR) of seed cake by investigating levels of 1.25, 1.67, 2.5, 3.33 and 5 kg Chemical Oxygen Demand (COD)/m³ day. Reactors were fed at flow rates of 125, 167, 250, 333 and 500 ml/day, yielding Hydraulic Retention Times (HRTs) ...


    By Inderscience Publishers

  • 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

  • Development of Waste Sawdust as a plant protection material for horticulture and agriculture

    Untitled Document Lignin is one of the major wastes of modern society, in the form of wood waste such as sawdust. In nature, lignin is ...

  • Regional roundup

    ANAEROBIC DIGESTER ON UNIVERSITY CAMPUS The University of Guelph’s Ridgetown Campus, part of the Ontario Agriculture College (OAC), received an investment of more than US$2.6 million for construction of an anaerobic digester through the Federal Development Agency for Southern Ontario. OAC, with its Center for Agricultural Renewable Energy and Sustainability, views the digester as “a ...


    By BioCycle Magazine

  • A study on Air Filled Porosity evolution in sludge composting

    Air Filled Porosity (AFP) is a key parameter in the composting process, conditioning oxygen availability and heat accumulation. Air pycnometry is considered the most adequate methodology for AFP determination. This technique requires withdrawing a sample of material from the composting mass for AFP measurement, which may alter its physical characteristics. A novel strategy that permits to measure ...


    By Inderscience Publishers

  • Vermicompost as an accelerator of methane production

    The influences of different vermicompost concentrations of 8.33, 4.35 and 0.9%, respectively (based on TS), on the CH4 production, Specific Methanogenic Activities (SMAs) of the anaerobic sludge, pH and COD removal were investigated. A maximum cumulative CH4 production of 874 ml/L fermentation liquor was obtained from the experiment with vermicompost concentration of 8.33% which increased by ...


    By Inderscience Publishers

  • Prokaryote community dynamics in anaerobic co-digestion of swine manure, rice straw and industrial clay residuals

    The aim of this study was to analyze the effect of the addition of rice straw and clay residuals on the prokaryote methane-producing community structure in a semi-continuously stirred tank reactor fed with swine manure. Molecular techniques, including terminal restriction fragment length polymorphism and a comparative nucleotide sequence analyses of the prokaryotic 16S rRNA genes, were ...


    By IWA Publishing

  • Lagoon treatment for manure case study

    Are you getting a scale build up in your recirculation system from your manure holding ponds (lagoons)? Is it calcium carbonate or struvite (magnesium-ammonia-phosphate) crystals? In some CAFO sites, they will use anaerobic lagoons to reduce the amount of manure that they need to treat. In a zero oxygen environment the anaerobic bacteria will take the manure which is loaded with nutrients and ...


    By Struvite Removal

  • Pretreatment of brewery effluent to cultivate Spirulina sp. for nutrients removal and biomass production

    Due to the low concentration of nitrate and high contents of organics, brewery effluent was not suitable for the cultivation of Spirulina sp. This work changed the nutrient profile of brewery effluent effectively by dilution, addition of nitrate, and anaerobic digestion. The result showed that the optimum dilution rate and NaNO3 addition for brewery effluent were 20% and 0.5 g/L, ...


    By IWA Publishing

  • Removal and recovery of ammonia from chicken manure

    The feasibility of the conversion of organic nitrogen available in raw chicken manure (CM) into ammonia via hydrolysis and the removal of ammonia from anaerobically digested manure were evaluated in this study. Firstly, the hydrolysis experiments were performed and the effects of temperature, total solids (TS) content and retention time were investigated. The results showed that 90% of the ...


    By IWA Publishing

  • Lamb-Weston’s French Fry Plant Saves on Fuel Costs with ADI-BVF® Anaerobic Reactor

    Location: Taber, Alberta, Canada • Sector: Food & Beverage The Client: Lamb-Weston is a division of ConAgra Limited—one of the largest potato processors in the world. The company operates several french fry processing plants. The Client’s Needs: Lamb-Weston required a wastewater treatment solution at its plant in Taber, Alberta, ...

  • Effect of poultry waste on vermicomposting of anaerobically digested cattle dung slurry

    This study was conducted to explore the effect of poultry waste (PW) on the vermicomposting of anaerobically digested cattle dung slurry (CDS) using Eisenia fetida worm species. A total of three vermicomposting beds, having different percentage of PW and CDS were established (100% CDS; 75% CDS + 25% PW; 50% CDS + 50% PW). At the end of experiment vermicompost showed a higher concentration of ...


    By Inderscience Publishers

  • Immobilization of lead by a vermicompost and its effect on white bean (Vigna Sinenis var. Apure) uptake

    Trace metals are known to stimulate the activity of anaerobic methanogenic bacteria involved in the degradation of organic matter. The objective of this research was to investigate the effect of three trace metals, iron, nickel and cobalt on the activity of halophilic methanogens, digester sludge and a mixed culture of halophilic bacteria and digester sludge, at various salt concentrations. Iron ...

  • The state of composting and biological waste treatment in the UK

    In 2005/06 3.4 million tonnes of source segregated waste was composted, an increase of 28% on the previous year. 85% was municipal waste, with just over half of this collected at civic amenity sites Less than one per cent of municipal waste was kitchen waste collected at the kerbside 65% of waste composted was composted at dedicated composting / biological treatment sites, with 10% on farm and ...

  • Matching of an anaerobic animal waste digester with a dual-fuel generator unit

    This paper describes a scientific method for matching an anaerobic fermentation digester using animal dung with a diesel engine power-generating unit, in such a way as to specify the digester capacity to be suitable for various specific energy needs. An experimental model consisting of an Indian-type digester connected to a constant speed, single cylinder 3 kW diesel engine, was designed, ...


    By Inderscience Publishers

  • Pretreatment of piggery wastewater by a stable constructed microbial consortium for improving the methane production

    A stable aerobic microbial consortium, established by successive subcultivation, was employed to solubilize the solid organic fraction in swine wastewater. In the 30 days' successive biological pretreatments, 30–38% of volatile solids and 19–28% total solids in raw slurry were solubilized after 10 hours at 37 °C. Meanwhile, soluble chemical oxygen demand ...


    By IWA Publishing

  • Anaerobic degradation of palm oil mill effluent (POME)

    The biodegradation characteristics of palm oil mill effluent (POME) and the related microbial community were studied in both actual sequential anaerobic ponds in Malaysia and enrichment cultures. The significant degradation of the POME was observed in the second pond, in which the temperature was 35–37 °C. In this pond, biodegradation of major long chain fatty acids (LCFA), such as palmitic acid ...


    By IWA Publishing

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