强化菌株NERC0401去除水体中的甲基叔丁基醚

Study on applying intensified technique to remove methyl tert-butyl ether from waters by strain NERC0401

为强化菌株NERC0401对污染水体中难降解物甲基叔丁基醚(MTBE)的去除,采用间歇方法考察了海藻酸钠浓度、氯化钙浓度、包埋固定化小球粒径、添加物以及共存有机物对包埋固定化菌株NERC0401去除MTBE的影响。结果表明,在海藻酸钠和氯化钙浓度均为2%以及包埋小球粒径约为1.50mm的条件下,固定化菌株具有较好的生物活性,对MTBE的生物去除率在55%以上,优于游离态菌株;当添加0.5%的活性炭后,其去除效果可得到提升;质量浓度约200mg/L的乙醇的存在也会对生物去除MTBE产生一定的强化作用。

In order to improve the capacity of methyl tert-butyl ether （MTBE） degradation, strain NERC0401 was immobilized with calcium alginate, and such factors as the concentration of sodium alginate and CaCl2, the size of bead, and the accretion and coexisting organic compounds were investigated through batch experiment. The results showed that the removal of MTBE by strain NERC0401 was above 55% under optimal condition, in which the concentrations of sodium alginate and CaCl2 was all 2% and the diameter of bead was 1.50 mm. Further study indicated that MTBE degradation performance of microbe beads could be enhanced to some extent when 0.5% of activated carbon was added or 200 mg/L ethanol coexisted with MTBE.