紫外辐射与生物膜同步耦合降解喹啉

UV irradiation intimately coupling biofilm for quinoline degradation

紫外辐射光解与生物降解同步耦合的气升式内循环反应器用于喹啉的降解.实验过程中分别采用单独紫外光解、单独生物降解和紫外光解与生物降解同步耦合的方法对喹啉进行降解.结果表明,喹啉在紫外光解与生物降解同步耦合的作用下,其降解速率明显提高.喹啉降解动力学分析结果表明,喹啉的生物降解可以用有抑制性的Haldane模型描述.相比生物降解过程,单独紫外光解对喹啉的降解速率可以忽略,但将紫外辐射与生物降解耦合在一起后,可以提高喹啉的最大降解速率近1倍并减小抑制常数36%,同时还可以提高喹啉的矿化程度.

Internal loop photolytic biological reactor was used for quinoline degradation by means of three protocols： photolysis alone,biodegradation alone and photo-biodegradation.Experimental results indicated that quinoline removal rate was accelerated clearly under intimately coupled photolysis and biodegradation.Quinoline removal rate could be described with Haldane model as the inhibition to microorganism according to the analysis of quinoline removal kinetics.Compared with quinoline removal rate by biodegradation alone,the photolytic rates might be ignored.But the maximum quinoline removal rate was increased by one times after photolysis was intimately coupled with biodegradation for quinoline degradation,and the inhibition constant was decreased with 36%,at the same time,the quinoline mineralization degree was also increased by intimately coupled UV irradiation and biofilm.