anaerobic composting Articles

  • 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

  • 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.

  • Decolorization of paper mill effluents with disimilar characteristics using anaerobic composting

    Currently, there are no national standards for color limits in pulp and paper mill  wastewaters effluents. In some cases, there are regional or State stream standards based on the receiving waters. Decolorization of this industry wastewater is getting higher concerns due to possible regulations to the color of the discharge effluents. The sustainability of color removal and the degree and ...

  • Composting in flanders: the vlaco experience

    Currently, the Flanders waste policy is based on the so-called ‘ladder of Lansink’. Six aerobic composting and one anaerobic digestion plant are operational for the treatment of biowaste. Some new composting plants are foreseen for 1999 and/or 2000. Composting retention time varies from 10 to 15 weeks. Green waste is treated in 15 open air composting plants. With respect to the use of compost ...


    By ORBIT e.V.

  • The relevance of moisture control in organic municipal Solid waste windrow composting process

    The valorisation of the Municipal Solid Waste composting fraction assumes importance in management strategies of the MSW and constitutes a way of producing an organic material such as humus to improve the soil aeration, the water holding capacity and valuable product when used as soil amendment because it is a source of nutrients (N, P, K) and useful for recovery of poor and degraded soils. It is ...


    By ORBIT e.V.

  • Phosphorus distribution in untreated and composted solid fractions from slurry separation

    Received for publication May 7, 2009. The distribution of phosphorus (P) (water-soluble inorganic P [Pi], acid-soluble Pi, and residual P) was determined in 40 samples of solids from solid–liquid separated slurry. These were collected from separation plants using different technologies, separating by simple mechanical means, by flocculation as pre-treatment before mechanical separation or by ...

  • Evaluating the potential of an electronic nose for detecting the onset of anaerobic conditions during composting

    Most bad odours in composting plants are formed under anaerobic conditions and often they could be avoided if detected early enough. In this project an electronic nose was used to evaluate the odours produced during a composting process at bench scale. The electronic nose consists of an array of electronic chemical sensors with partial specificity and an appropriate pattern recognition system ...


    By ORBIT e.V.

  • 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

  • Odour pollution problems caused by composting activities in flanders: current situation and abatement strategies

    In Flanders, garden fruit and vegetable (GFV) waste is selectively collected and composted in 7 composting plants, in six of which aerobic indoor composting is used. In the seventh plant waste is anaerobically digested first followed by an aerobic post-treatment. The total amount of waste composted was about 275 000 tons in 1997 (OVAM, 1999). The nominal capacity of the composting plants varies ...


    By ORBIT e.V.

  • Composting and biogasification for senna pod waste stabilization

    A medical factory in Finland extracts sennocid from pods of a senna plant with a solvent containing methanol and water. Sennocid is the active compound in some constipation medicines (Otavan Iso Kasvitietosanankirja, 1981). The extraction process produces 50 m3 of pod waste weekly. In 1998, 757 tons of pod waste was produced. The water and methanol contents of the waste are approximately 25 w/w-% ...


    By ORBIT e.V.

  • Editorial: Good And Bad Apples

    The ReFED “Roadmap To Reduce Food Waste By 20 Percent” (Roadmap) was released on March 9, and very quickly became the go-to document for data on all things food waste — from produce left in the fields to the economic value of centralized composting and anaerobic digestion (AD) of food waste. The ReFED project — ReThink Food Waste Through Economics And Data — was ...


    By BioCycle Magazine

  • Monitoring Moisture In Composting Systems

    Monitoring Moisture In Composting Systems IF YOU SQUEEZE a handful of material and water drips or trickles out, it is the right moisture content for composting.” This bit of hands-on wisdom comes from the proverbial squeeze-test for evaluating moisture in composting piles. It has been uttered by Master Gardeners and other composting educators for many years as a tool for determining, and ...


    By BioCycle Magazine

  • Compost stability: a comparative evaluation of respirometric techniques

    The new Paradigm in waste management promotes attitudes and processes that conserve resources and reduce pollution. Under this philosophy, organic waste is increasingly recognised as a recyclable material, a useful resource, making composting one of the key elements of modern waste management. As the composting industry is expanding rapidly there is a growing need for a simple, fast, relatively ...


    By ORBIT e.V.

  • “Jerez guadalete w.w.t.p.”: from sludge to biosolids, and finally e.u. ecological fertilizer?

    ‘Guadalete W.W.T.P’ began its operations in January 1994 in ‘Jerez de la Frontera’, in the province of Cádiz, southwestern Spain. 15.000 t of anaerobically digested dewatered sludge has been produced on a yearly basis over the last four years. An 11 hectares open-air windrow composting facility, privately owned and operated, has permitted sludge to be transformed into biosolids compost. Compost ...


    By ORBIT e.V.

  • 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

  • Formation and emissions of ammonia and greenhouse gases from stored and composted solid animal manure

    Beside other branches of industry, agriculture is an important source of methane (CH4) and nitrous oxide (N2O) emissions and the most important source of ammonia (NH3). In spite of several investigations concerning ammonia and greenhouse gas emissions during storage and composting of liquid and solid animal manure, the real extent of these emissions is still unknown. This is mainly because of the ...


    By ORBIT e.V.

  • 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 ...

  • Food composting infrastructure

    From 1995 to 2000, BioCycle published an annual national survey of food waste composting projects in the United States. Since then, we have continued to track food waste composting activity, and in 2007 launched www.findacomposter.com, a publicly searchable data base that lists many sites in the U.S. that receive municipal, commercial, institutional and industrial food waste ...


    By BioCycle Magazine

  • Why home composting is so great!

    Have you heard of composting, but just aren’t sure what it means? Not sure why how compost can benefit you? If you haven’t started composting at home yet, now is the time! Home composting is more than just a growing trend among gardeners, it’s a great way to recycle your kitchen scraps and yard refuse into something you can use-compost! So what is compost and why is it so ...


    By Biofinch Ltd.

  • Composting

    Introduction Composting is a controlled biological process by which organic contaminants (e.g., PAHs) are converted by microorganisms (under aerobic and anaerobic conditions) to innocuous, stabilized byproducts. Typically, thermophilic conditions (54 to 65 °C) must be maintained to properly compost soil contaminated with hazardous organic contaminants. The increased temperatures result from heat ...

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