基于硅酮母粒的两相分配气升式生物反应器处理氯苯废气的研究

The removal of hydrophobic contaminants is one of the key problems of biological treatment of waste-gas.In this work,a two-phase partitioning airlift bioreactor which using silicone masterbatch as the non-aqueous phase was prepared to treat chlorobenzene-containing waste-gas.The results showed that the silicone masterbatch had a high affinity for chlorobenzene without biotoxicity and biodegradability.The cells adsorbed on the surface of silicone masterbatch had no obvious effect on its partition coefficient.The airlift bioreactors could continuously remove chlorobenzene from the waste-gas.When the inlet concentration was 1000 mg•m^-3,the removal efficiency of 60% was obtained in the single-phase system (without silicone masterbatch),and 90% was obtained in the two-phase partitioning system which also harbored higher CO₂ mineralization ratio and shock resistance capacity.The optimum silicone masterbatch fraction (V/V) and empty bed residence time of the bioreactor were 10% and 90 s,respectively.The effect of silicone masterbatch on the mass transfer of chlorobenzene was evaluated through the maximum mass transfer rate (β_s ^*),whose value increased more than 20% by the addition of silicone masterbatch.