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Gas utilisation |
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University of Padua IMAGE Department |
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Gas utilization v Anaerobic degradation of organic waste generates methane v Potentially significant environmental impacts from LFG v Potential energy source Why not utilize the energy and avoid the problems? Utilization systems • CHP Plant (Combined Heat and Power) • Boiler Plant • Direct use of landfill gas • Use of landfill gas in vehicles • Upgrading to piped gas quality (CO2 removal) • Fuel Cell Problems in LFG Utilisation • Settlements • Blockage by water • Air penetration • Corrosion • Discontinous LFG supply Landfill gas plants • A landfill gas plant consists of an extraction and a utilization system, which can be made of different type of systems • The extraction system can consist of vertical perforated pipes, horizontal perforated pipes or ditches, and in some cases a membrane covering the landfill, under which the produced gas is collected • The gas is sucked out from the landfill by means of a gas pump and pressed through a transmission pipe to a utilization plant Number of LFG plants worldwide • Today approximately 1150 landfill gas plants exist worldwide, from which the gas is used for energy purposes • Europe has the biggest number with approximately 730 plants • USA has now more than 350 plants and here is still a high potential for more • The plants in Asia are located in Korea, Taiwan, China and Hong Kong • In Africa plants are to find in South Africa and in South America the plants until now are located in Brazil |
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(Source: Willumsen, 2003) |
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Investement costs in LFG Recovery System |
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(Source: Willumsen, 2003) |
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Landfill gas plant in Pescantina, Italy (from Daneco Spa) |
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Landfill gas plant in Trevignano Udinese, Italy (from Daneco Spa) |
