With the continued threat of global warming and oil shortages, the quest for an alternative clean, renewable energy has skyrocketed. Hydrogen is promising but the cost to harness it and convert machines to use it is astronomical. Biodiesel and methanol are other alternatives, but their supply falls far short of the demand. Methane gas collected from waste water treatment plants (WWTP) and landfills has huge potential as an energy source. However, widespread commercialization of the conversion of landfill gas to electricity has been hampered by the costly removal of siloxanes required to protect power generation equipment from damage. Controlling the costs for converting landfill gas into energy is vital if this resource is to be used to make electricity or pipeline purity gas. An effective and low cost measurement and removal method for siloxanes in landfill and digester gas has been developed by Applied Filter Technology. The SAG Process has been tested on a number of sites over the past eleven years and it is now operating at landfills and digesters throughout the world. The company has perfected a low cost method for analyzing the siloxanes at the sites with the SIL-2 Field Test Kit. This is a very simple procedure involving filling Tedlar bags and sending them back to AFT for gas analysis. With the data received from the gas analysis, a low cost method for removing siloxanes with SAGTM Polymorphous Porous Graphite Filters is employed. These specialized porous graphites have been designed to selectively remove the siloxanes in the presence of other contaminants in the gas stream. The company combines its guaranteed SAG technology with compression and chilling, when needed, to provide a complete integrated package for landfill gas treatment.
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