Downdraft Biomass Gasifier These systems basically convert woody biomass /agricultural wastes like rice-husk, coconut waste etc. into a combustible gas which can be used in a number of ways:Fed into diesel engines (C.I. Engines) to save 65 to 75% of the normal diesel consumption,Burnt like a conventional gaseous fuel through appropriate burners, in case of thermal applications.Fed into gasoline engines (S.I. Engines) to replace 100% gasoline etc.