生物表面活性剂与蒽降解菌的协同降解效应

对蒽生物降解中铜绿假单胞菌S6分泌的生物表面活性剂的作用进行了研究.结果表明,在接种蒽降解菌A10之前1d及与接种A10同时投加60mg.l-1的生物表面活性剂能够最大程度地促进蒽降解,相比于未添加表面活性剂的样品,降解率分别提高了16.50%和18.03%.过高浓度的生物表面活性剂会在一定程度上抑制蒽的降解.对蒽降解过程的分析表明,提前投加生物表面活性剂能明显促进蒽的降解且一直保持较好的降解效果.蒽降解过程中,生物表面活性剂能够被微生物利用,具有生物可利用性,是一种环境友好的生物制剂.

EFFECT OF BIOSURFACTANT AND DEGRADING STRAIN ON ANTHRACENE BIODEGRADATION

The function of biosurfactant which was produced by Pseudomonas aeruginosa S6 in biodegradation process of anthracene was studied.The results showed that the biodegradation was enhanced by biosurfactant of 60mg·1~(-1) when it was added 1 day before and at the same time with inoculum of degrading strain A10,and the degradation rate increased by 16.50% and 18.03% compared with control,respectively.Excessive biosurfactant could inhibit biodegradation of anthracene to some extent.The analysis of degradation process of anthracene exhibited that addition of biosurfactant ahead of degrading strain could promote anthracene degrada tion evidently and keep preferable effect.Biosurfactant could be utilized by strain,suggesting its bioavailabili ty,thus it is an environmentally friendly biological reagent.