Energy utilization from biomass resources has started to attract public attention as a method to reduce CO(2) emissions. In this study, the characteristics of syngas production from biomass gasification were investigated in a downdraft gasifier that was combined with a small gas engine system for power generation. Syngas temperatures from the gasifier were maintained at a level of 700-1000 degrees C. When the air ratio for gasification was 0.3-0.35, the low heating value of syngas was 1100-1200 kcal Nm(-3) and the cold gas efficiency 69-72%. Tar concentration in raw syngas was around 3.9-4.4 g Nm(-3). Syngas combustion in the gas engine after purification showed that HC concentration was below 200 ppm, and NOx concentration was below 40 ppm in the exhaust gas. (C) 2011 Elsevier Ltd. All rights reserved.