anaerobic digestion processes Articles

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Bio-fuels- Anaerobic digestion

by Triangle Ltd  (Sep. 29, 2008)

Anaerobic digestion is a series of processes in which micro organisms break down biodegradable material in the absence of oxygen. It is widely used to treat wastewater sludges and organic (agricultural) wastes.  As part of an integrated waste management system, anaerobic digestion reduces the emission of gas into the atmosphere. Anaerobic ...

Anaerobic Digestion—What Are the Economics?

by Waste Advantage Magazine  (Jul. 1, 2014)

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 ...

Advances in Thermophilic Anaerobic Digestion

by Water Environment Federation (WEF)  (Oct. 22, 2006)

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 ...

Why Anaerobic Digestion

by Bio-en Power Inc.  (Aug. 16, 2013)

The Laws of Ecology. Closing the circle; nature, man, and technology. Everything is connected to everything else. Everything must go somewhere. Nature knows best. There is no such thing as a free lunch. Economic Drivers AD is more cost effective than other treatment options. AD ...

Anaerobic Digestion Of Compostable Bags

by BioCycle Magazine  (Oct. 25, 2013)

Dry anaerobic digestion facility in Luxembourg successfully treats mixed yard and food waste collected in compostable plastic bags. Preprocessing, anaerobic digestion and composting operations are enclosed at the Syndicat Minett-Kompost facility. While the value of compostable plastic bags to increase participation in residential source ...

Anaerobic digestion in the United Kingdom

by BioCycle Magazine  (May 1, 2013)

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 ...

The Effect of the Microsludgetm Treatment Process on Anaerobic Digestion Performance

by Water Environment Federation (WEF)  (Oct. 13, 2007)

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 ...

Assessment of the state of the art of technologies for the processing of digestate residue from anaerobic digesters

by IWA Publishing  (May 9, 2013)

Anaerobic digestion is widely used as an important source of renewable energy. With the increasing number and capacity of biogas plants also, adequate treatment technologies for whole digestate – the residue from anaerobic digestion – are gaining attention. In this study the state of the art of digestate processing is analysed, and ...

Operational Experience of Advanced Anaerobic Digestion

by Monsal Limited  (Mar. 27, 2014)

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 ...

Evaluation of anaerobic digestate as a substrate for vermicomposting

by Inderscience Publishers  (Aug. 5, 2014)

Vermicomposting is an established process to convert organic wastes into vermicastings suitable for plant growth. This research investigated the vermicomposting of anaerobic digestate with four different ratios of sawdust as a bulking material, for 75 days. The optimum proportion of anaerobic digestate to sawdust was identified as 70:30 based on ...

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