Abstract
VPSA (Vacuum Pressure Swing Adsorption) process that can remove harmful matter such as hydrogen sulfide, siloxane and carbon dioxide in digestion gas is developed in order to maintain soundness of power generation facilities in the system sewage sludge digestion gas is collected, and to utilize in power generation. The field examination (1〜10M^3N/h scale) by true digestion gas was executed in the sewage sludge treatment plant. As a result, more than CH_4 concentration 95%, more than methane recovery 95% are achieved with more than hydrogen sulfide removal rate and more than siloxane removal rate 99%.
