A Novel Integrated Scheme for Stabilizing Biological Oxidation Process Performance in Treating Waste Gas Streams

摘要

Most off-gas or treatment streams for VOCs that originate in industrial processes have variable flowrates and transient loadings,which limit the handing efficiency of the biological oxidation processes.For this purpose,an adsorption system was designed and installed in series before the biological oxidation process. Basically,the adsorption system consisted of two fixed beds which are alternately pressurized and depressuriz- ed,in which a two-step cycle,i.e.,adsorption and desorption was simply achieved.The results obtained revealed that the fixed two-bed adsorption system served successfully as a buffering unit to flatten and reduce the VOC concentration in the treated air which allowed long-term stable performance of the biological oxidation process.