Abstract：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.
