WASTE-GAS BIOTREATMENT TECHNOLOGY

This paper presents fundamental and theoretical aspects of biological waste gas treatment technologies as well as examples of applications t o different compounds. The three most widely used technologies are des cribed, namely biofiltration, bioscrubbing and trickling biofiltration , focusing more extensively on biofiltration which is the most studied and most extensively used process. A description of the different tec hnologies from technological and economic points of view, including an analysis of models used in waste gas biotreatment is given. Results p resented in the literature concerning the removal of aliphatic, aromat ic and mixtures of contaminants are reviewed. Carrier materials, inocu la selected and alternatives proposed for regulating moisture content, pH values or for controlling pressure drop are considered. New techno logies and reactor design studied at laboratory-scale are mentioned. ( C) 1998 SCI.