Biogas is a very important renewable energy for the future, and ASPE Inc. has secured and commercialized the original technology for the separation and purification of high-purity methane gas using the PSA method. Biogas consists of methane, carbon dioxide, and flue gases and comes from landfills, agricultural waste treatment plants, wastewater treatment facilities, and anaerobic digesters (food, livestock sewage, wastewater, etc.). Refined, high-purity methane gas is very useful for automobile fuel and natural gas supply.
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