anaerobic digestion processes Articles

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Managing Compostable Bags At Anaerobic Digestion Plants

by BioCycle Magazine  (Sep. 1, 2012)

The highest and best use for treating residential food waste is through source separation, sending organics first to anaerobic digestion (to capture energy), followed by aerobic composting (to return nutrients to the soil). Sending food waste to anaerobic digestion (AD) facilities requires appropriate tools and planning for capturing high volumes ...

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 ...

Anaerobic co-digestion of cattle manure with rice straw: economic & energy feasibility

by IWA Publishing  (Jan. 11, 2013)

Rice straw (RS) is one of the most abundant wastes generated in Valencia (Spain). Traditional waste disposal methods are harmful to the environment. The straw burning emits large amounts of toxic air pollutants and the straw burying produces uncontrolled anaerobic fermentation in the soil. The aim of this research was to evaluate the feasibility ...

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 ...

Optimizing removal of estrogenic compounds in biosolids: a comparison of anaerobic, post-aerobic, and cambi digestion

by Cambi AS  (Dec. 15, 2009)

ABSTRACT Anaerobic digestion is a key treatment step during wastewater treatment because it is often the final significant solids treatment process prior to land application. Land application of biosolids is a vital practice for sustainable waste management; therefore, the presence of estrogenic compounds in biosolids is one concern to this ...

Latest Progress in Anaerobic Digestion

by BioCycle Magazine  (Jan. 1, 1999)

Compared to countries like Germany and Denmark, the United States and Canada have a long way to go in creating the fundamental policy incentives and regulatory mandates that will encourage market development for anaerobic digestion (AD). Someone recently asked me how many years it would take to deploy AD systems on farms in North America that are ...

Measuring methane at the UK`s first viable compact anaerobic digester plant

by Geotech  (Apr. 18, 2013)

At the UK's first viable compact anaerobic digester (AD) plant aimed at local food waste treatment, a Geotech GA3000 fixed biogas analyser monitors methane (CH4), carbon dioxide (CO2), oxygen (O2) and hydrogen sulphide (H2S). The plant, a modular scalable AD system, unveiled by React Environmental in July 2012 at Llangadog, Carmarthenshire, can ...

Production of methane gas from organic fraction municipal solid waste (OFMSW) via anaerobic process: application methodology for the Malaysian condition

by Inderscience Publishers  (Aug. 1, 2013)

Solid waste management in Malaysia is confronted with many problems, including low collection coverage, irregular collection services, inadequate equipment used for waste collection, crude open dumping and burning without air and water pollution control systems, inadequate legal provisions and resource constraints. These problems have various ...

Anaerobic Digestion at Dairy Farms

by BioCycle Magazine  (Jan. 1, 1999)

The need to upgrade dairy waste management practices to overcome pollution problems is leading more farmers to seek solutions with anaerobic digestion technology. Two recent examples of this trend are underway at California sites. The Cal Poly Dairy is located adjacent to the California Polytechnic State University campus in San Luis Obispo. The ...

Thermal hydrolysis pre-treatment for high solids anaerobic digestion

by Cambi AS  (Dec. 18, 2009)

The City and County of San Francisco completed a two-year pilot study of pre-treatment processes to mesophilic anaerobic digestion for improved biosolids stabilization and production of biosolids suitable for unrestricted reuse (class A biosolids). The results of this effort will help in the design of the new Solids Handling Facility (SHF) at the ...

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