多环芳烃污染土壤的生物泥浆法修复

Bioslurry Remediation of Soil Contaminated with Polycyclic Aromatic Hydrocarbons

通过小型泥浆反应器的运行 ,确定了生物泥浆法修复多环芳烃污染土壤的温度、水土比和通气量参数 .采用 2 :1的水土比 ,控制温度、通气量分别为 2 0℃～ 2 5℃ ,60L/h可以达到较好的修复效果 .用从污染土壤中分离出的真菌在纯培养条件下对多环芳烃进行降解 ,经 34d的培养 ,镰刀菌对芘和苯并蒽的降解率为 90 %和33 3% ,毛霉可以分别降解 81 .5%和 4 9.2 % ,青霉可以分别降解 52 %和 4 6%

Through the operation of the pilot scale slurry reactor, the operational parameters of bioslurry remediation for soil contaminated with polycyclic aromatic hydrocarbons(PAHs), including temperature, ratio of water to soil, aeration flux, were determined. As the operational condition was that the ratio of water to soil was 2:1, the temperature was 20℃～25℃ and aeration flux was 60L/h, a good result of the remediation could be achieved. With the fungi isolated from contaminated soil as pure culture to degrade PAHs, after 34 days incubation, 90% of pyrene and 33.3% of benz[a]anthracene were degraded by Fusarium 81.5% of pyrene and 49.2% of benz[a]anthracene were degraded by Mucor, 52% of pyrene and of 46% of benz[a]anthracene were degraded by Penicillium.