http://www.financialexpress-bd.com/index3.asp?cnd=10/29/2006§ion_id=5&newsid=41810&spcl=noBIOGAS, an alternative to conventional fuel oil or wood, is being increasingly used in Bangladesh. It is being used for cooking and other household purposes in rural areas of the country.
The consumers of biogas said they use it instead of wood and other fuels because it is cost effective and environment-friendly. The residue left after gas extraction is a good organic manure, free from harmful germs and pathogens.
Cattle dung, human excreta, poultry drippings and garbage are processed in the biogas plants under anaerobic conditions to produce biogas. Most of the biogas plants in the country have been set up to process cattle dung. Seven or eight cows are required for a plant. The dung is mixed with water in equal ratio and stored in a tank. After 10 to 12 days biogas is produced in the plant which is supplied to the ovens through plastic pipes. A family of five or six members can easily cook their food and light lamps in their houses with a plant.
About 70 per cent of the gas is methane which is better as fuel than firewood and the remaining gas is carbon-dioxide. People use the gas like natural gas. The biogas, supplied from the plant to the kitchen is used to run a two-burner cooker where the gas burns with clean blue flame, free of smoke or ash, much the same way a Dhaka city household burns Titas gas. The Biogas Pilot Plant Project of the Institute of Fuel Research and Development under the Bangladesh Council for Scientific and Industrial Research (BCSIR) started installation of biogas plants in 1995. The cost of installation of a plant with a production capacity of 100 cubic feet gas daily was at Tk 14,000.
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