Production of High Calorific Biogas from Organic Wastewater and Enhancement of Anaerobic Digestion

Abstract:

Anaerobic digestion is a widely applied technology to produce biogas from organic wastewater. The biogas calorific value depends on the methane-content. For biogas flows >100 m³/h, the two-step process is usually used for production of high calorific biogas from organic wastewater: the first step, anaerobic digestion; the second step, biogas purification. However, for biogas flows 3/h, biogas purification is not economical, and one-step process according to the big gap between methane and non-methane-gas in solubility at higher pressure or lower temperature, should be condidered. New anaerobic digestion processes, such as micro-aerobic process, electrolysis enhancing methane production process, process of internal circulation anaerobic digester (ICAD) with sewage source heat pump, may all enhance biogas producton or lower biogas production cost. In addition, suitable environmental conditions, such as organic loading rate (OLR), solid retention time (SRT), hydraulic retention time (HRT) and surface area, are all beneficial to enhance methane fermentation. Furthermore, new operation modes and optimal dose of trace metals might be selected.

• Periodical: Advanced Materials Research (Volumes 550-553)
• Pages: 522-528
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.550-553.522
• Online since: July 2012
• Authors: Yan Qiu Nie, Yu Xiu Li, Hui He, Wen Jing Zhou, Zhao Hui Pang, Hui Bing Peng
• Keywords: Anaerobic Digestion, Enhancement, High Calorific Biogas, Organic Wastewater, Production

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