Anaerobic Digestion of Kitchen Wastes: “Biogas Production, Purification and Application in I.C Engines”
نویسندگان
چکیده
Currently, much of our biodegradable wastes such as kitchen wastes, agricultural wastes & animal wastes are used to produce Biogas, a powerful greenhouse gas. Anaerobic digestion (AD) is a treatment that composts these wastes in the absence of oxygen, producing a biogas that can be used to generate Heat & Power. Producing renewable energy from our biodegradable wastes helps to tackle the energy crisis. AD produces biogas of around 60 per cent methane, 30 percent carbon dioxide (CO ), 2 percent hydrogen sulphide (H2S) and other constituents. As well as biogas, AD produces a solid and liquid residue called digestate which can be used as a soil conditioner to fertilise land. The amount of biogas and the quality of digestates obtained will vary according to the feedstock used. More gas will be produced if the feedstock is more liable to decompose. For application as a fuel in I.C Engines it is required to remove carbon dioxide (CO2) and hydrogen sulphide (H2S), because H2S corrodes vital mechanical components of engine and CO2 reduces heating effect if it is not removed. Therefore Biogas is required to be upgraded through purification by removing H2S and CO2
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