Tóm tắt nội dung:   Control of VOC and  HAP by Biofiltration 15.1 INTRODUCTION A biofilter consists of a bed of soil or compost beneath which is a network of perforated pipe. Contaminated air flows through the pipe and out the many holes in the sides of the pipe thereby being distributed throughout the bed. A biofilter works by providing an environment in which microorganisms thrive. The organic substrate provides the salts and trace elements for the bacteria, and the VOC provides the food source. This...