Japanese city turning waste into biogas to advance energy transition


Chemical company Asahi Kasei is to construct a biogas purification system at a sewage treatment plant in Kurashiki City, Okayama, Japan, which can separate and recover CO2 and methane emissions.

During a trial held today, 15th September, Asahi Kasei showcased the system, which uses its K-GIS zeolite adsorbent to selectively adsorb CO2 from biogas released from sewage. 

According to the company, K-GIS differs from conventional adsorbents by adsorbing almost no methane, enabling the system to efficiently separate and recover high-purity methane while recovering high-purity CO2. 

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