anaerobic digestion processes Articles

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Thermophilic anaerobic digestion of sewage sludge with high solids content

by IWA Publishing  (May 7, 2014)

The treatment performance of thermophilic anaerobic digestion (AD) of sewage sludge with high solids content was investigated with two laboratory-scale thermophilic anaerobic reactors (R1 and R2) with a feeding of pre-centrifuged sewage sludge. Reactor R1 was fed with sludge of 3.7% total solids (TS). The volatile solids (VS) removal ratio ...

Vacuum evaporation treatment of digestate: full exploitation of cogeneration heat to process the whole digestate production

by IWA Publishing  (Aug. 7, 2014)

Vacuum evaporation represents an interesting and innovative solution for managing animal waste surpluses in areas with high livestock density. To reduce operational costs, a key factor is the availability of an inexpensive source of heat, such as that coming from an anaerobic digestion (AD) plant. The aim of this study was to test vacuum ...

Idex Environnement’s Biogas plant at Amiens

by Clarke Energy  (Jul. 30, 2014)

The Anaerobic Digestion (AD) plant in Amiens is operated by Idex Environment. The biogas is derived from the municipal solid waste (MSW) originating from the local area. Clarke Energy has delivered a full turnkey installation for this site, creating renewable energy. The engines supplied for this project are two JGMC ...

PE-Recycling at its very best

by WEIMA Maschinenbau GmbH  (Aug. 5, 2014)

The Pipelife Group is a leading manufacturer of plastic pipe systems in Europe. The company's flagship products are created at its Stathelle facility in Norway, where PE pipeline pipes hundreds of meters long and up to 2.50 meters in diameter are produced for use throughout the world. Since the beginning of this year, production waste that ...

Improving products of anaerobic sludge digestion by microaeration

by IWA Publishing  (Feb. 26, 2014)

Biogas, digested sludge and sludge liquor are the main products of anaerobic sludge digestion. Each of the products is influenced significantly by specific conditions of the digestion process. Therefore, any upgrade of the digestion technology must be considered with regard to quality changes in all products. Microaeration is one of the methods ...

Improving nutrient fixation and dry matter content of an ammonium-rich anaerobic digestion effluent by struvite formation and clay adsorption

by IWA Publishing  (Jul. 23, 2014)

The anaerobic digestion (AD) of organic wastes that contain nitrogen leads to its mineralization, yielding a digestate rich in ammonium (NH4+), an important fertilizing nutrient. The applicability of AD digestate as fertilizer can be improved by fixating the nutrients and increasing its dry matter content. Methods for the fixation and ...

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 for ...

Evaluation of the aerobic and anaerobic biodegradability of the antibiotic norfloxacin

by IWA Publishing  (Jul. 23, 2014)

The purpose of studying the biodegradability of pharmaceutical compounds is to evaluate their behaviors in relation to the treatment processes generally used in domestic and industrial wastewater treatment plants. The antibiotic norfloxacin was found to be a recalcitrant compound. The studies conducted showed norfloxacin removal rates of ...

Software Download: Anaerobic Digestion Model No.1 (ADM1)

by IWA Publishing  (Jul. 18, 2014)

The IWA Task Group for Mathematical Modelling of Anaerobic Digestion Processes was created with the aim to produce a generic model and common platform for dynamic simulations of a variety of anaerobic processes. The purpose of this approach is to provide a unified basis for anaerobic digestion modelling. It is hoped this will promote increased ...

A modified anaerobic digestion process with chemical sludge pre-treatment and its modelling

by IWA Publishing  (Jun. 5, 2014)

Activated Sludge Models (ASMs) assume an unbiodegradable organic particulate fraction in the activated sludge, which is derived from the decay of active microorganisms in the sludge and/or introduced from wastewater. In this study, a seasonal change of such activated sludge constituents in a municipal wastewater treatment plant was monitored for ...

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