To efficiently utilize inexpensive waste biomass, it has been proposed that municipal solid waste consisting of various raw materials is hydrothermally pretreated to uniformalize their properties and then pyrolytically gasified into syngas. This study investigated the influences of hydrothermal treatment on subsequent gasification through the gasification tests and thermogravimetry of hydrothermally treated waste biomass and untreated Sugi samples. The results indicated that waste biomass became more difficult to be gasified after the hydrothermal treatment.
