anaerobic digestion processes Articles

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Biogas monitoring for upgraded biomethane

by Geotech  (Feb. 11, 2015)

By working with a range of partners worldwide, Geotech is involved in a range of projects at the cutting edge of biogas production and processing.  The recent landmark deal agreed between Marks & Spencer (M&S) and Future Biogas, a major biogas plant operator, is for the purchase of biomethane certificates. The deal sees M&S ...

Alkaline treatment of high-solids sludge and its application to anaerobic digestion

by IWA Publishing  (Jan. 21, 2015)

High-solids anaerobic digestion is a promising new process for sludge reduction and bioenergy recovery, requiring smaller digestion tanks and less energy for heating, but a longer digestion time, than traditional low-solids anaerobic digestion. To accelerate this process, alkaline sludge disintegration was tested as a pretreatment method for ...

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 ...

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 ...

Study of the recovery of phosphorus from struvite precipitation in supernatant line from anaerobic digesters of sludge

by IWA Publishing  (Oct. 16, 2014)

The goal of this work was to study the effective recovery of phosphorus from the supernatant of anaerobic digestion of sewage sludge by precipitation as struvite. The formation of struvite is envisioned as a promising process for nutrient removal and subsequent recovery, thus providing a strong incentive for its implementation, since the sewage ...

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 ...

Manure Spills: Prevention, Detection, Control Options, & the Role of Anaerobic Digesters

by BIOFerm™ Energy Systems  (Aug. 27, 2014)

An internet search for manure-related spills can lead to an exhausting list of news articles and images of catastrophic environmental damage. In Wisconsin alone, the ...

Manure Spills: Prevention, Detection, Control Options, and the Role of Anaerobic Digesters

by BIOFerm™ Energy Systems  (Aug. 27, 2014)

Manure Spills: Prevention, Detection, Control Options, and the Role of Anaerobic Digesters FOR IMMEDIATE RELEASE By Steven Sell, Biologist & Application Engineer Wednesdays August 27, 2014 ...

Optimization of Anaerobic Digestion & Bio-Organic Catalyst Compositions (BOCs)

by EcoJump LLC  (Aug. 19, 2014)

Abstract: Anaerobic digestion offers excellent opportunities to convert organic waste streams into environmentally safe bio-solids and generation of renewable energy through the bio-methane produced by the microbiological populations processing the wastes. Bio-organic catalyst compositions (BOCs) offer improvements in enhancing anaerobic ...

Development of a natural treatment system consisting of red ball earth and alfalfa for the post-treatment of anaerobically digested livestock wastewater

by IWA Publishing  (Sep. 17, 2014)

With the objective of developing a post-treatment process for anaerobically digested livestock wastewater, an innovative natural treatment system composed of two units is proposed. The first trickling filter unit further reduced biochemical oxygen demand and achieved a certain degree of nitrification. The second soil-plant unit was targeted at ...

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