好氧颗粒污泥降解MTBE共存污染物的试验研究

EXPERIMENTAL STUDY ON MTBE CO-CONTAMINANTS REMOVAL BY AEROBIC GRANULES

研究了降解MTBE的好氧颗粒污泥体系对MTBE共存污染物TBA和BTEX的降解性能,发现该体系能有效降解TBA和BTEX。降解TBA不需要适应期,且TBA的存在对MTBE的降解无明显抑制作用,可能由于微生物种群和降解酶未发生明显转换。体系对BTEX的降解速率明显高于MTBE和TBA,但存在较短的适应期,BTEX的存在对MTBE的降解产生一定的抑制作用,但可实现对BTEX和MTBE混合物的有效降解。

MTBE-degrading aerobic granules were employed to degrade the co-contaminants of MTBE, TBA and BTEX.The experimental results indi- cated that MTBE-degrading aerobic granules exhibited the excellent capability for biodegrading the co-contaminants, TBA and BTEX. The MTBE-degrading granules could quickly degrade TBA without an acclimation period. Moreover, the TBA had no obvious inhibition on the MTBE degradation, possibly because no changes occurred to the bacterial species and the involved enzymes with the transfer of the substrate between MTBE and TAB. Al- though there exisited a short adaptation period when the substrates were changed from MTBE to BTEX, the MTBE-degrading granules could efficiently degrade BTEX with a higher rate than MTBE and TBA. The aerobic granules could simultaneously efficiently degrade MTBE and BTEX mixtures, although the presence of BTEX mixtures would produce a certain inhibition on MTBE degradation.