生物滴滤床净化苯乙烯性能及强化降解  

Performance and Enhanced Degradation of Styrene in a Horizontal Bio-trickling Filter

作　　者：刘佳[1] 祁弘毅 窦晓娜 鲁少杰 李萍[1] 李坚[1] LIU Jia;QI Hongyi;DOU Xiaona;LU Shaojie;LI Ping;LI Jian(Beijing Key Laboratory of Regional Air Pollution Control,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学区域大气复合污染防治北京市重点实验室,北京100124

出　　处：《北京工业大学学报》2023年第8期916-925,共10页Journal of Beijing University of Technology

基　　金：北京市教育委员会科技计划一般项目(KM201810005034)。

摘　　要：针对生物滴滤床处理苯乙烯废气挂膜时间长、去除效率较低的问题,通过改良挂膜方法缩短挂膜时间,以及添加表面活性剂的方式强化降解。研究采用高浓度苯乙烯气-液相联合法,并在营养液中添加一定比例的葡萄糖,以驯化后的复合菌种为菌源,考察卧式生物滴滤床启动阶段的工艺性能。添加表面活性剂吐温-80强化卧式生物滴滤床的净化性能,研究其对生物滴滤床性能的影响及其作用机理。结果表明,生物滴滤床的挂膜启动时间仅为5 d,此挂膜方法实现了卧式生物滴滤床的快速启动。苯乙烯的进口质量浓度为700~1 100 mg/m^(3)、停留时间为35~40 s时,添加80 mg/L的吐温-80使苯乙烯去除效率提高10%左右。在卧式生物滴滤床系统中添加吐温-80能增大疏水性苯乙烯溶解度,提高生物膜胞外聚合物含量和优势菌群Proteobacteria(变形菌门)的占比,以及促进老化的生物膜脱落,强化了卧式生物滴滤床系统对苯乙烯的降解。In view of the problems such as the long time of biofilm formation and the low removal efficiency of styrene in a bio-trickling filter,the degradation can be enhanced by the modified method of start-up and the addition of surfactants.To investigate the performance of the horizontal bio-trickling filter at the start-up stage,high-concentration styrene gas-liquid phase combined start-up method was adopted and a small proportion of glucose was added into the nutrient solution.Domesticated compound strains were inoculated.Performance of the horizontal bio-trickling filter was enhanced by adding Tween-80,and its mechanism was studied.Results show that the start-up time of the horizontal bio-trickling filter is only 5 d.When the inlet concentration of styrene is 700-1 100 mg/m^(3) and the EBRT is 35-40 s,the addition of Tween-80 significantly increases the removal efficiency of styrene by about 10%.Degradation of styrene in the horizontal bio-trickling filter is enhanced in the presence of Tween-80 because the solubility of styrene can be improved in the horizontal bio-trickling filter system,and the content of extracellular polymeric substances and the proportion of dominant bacterial community(Proteobacteria) increases.In addition,the shedding of aging biofilm is accelerated.

关 键 词：生物滴滤 苯乙烯 挂膜启动 强化降解 吐温-80 微生物群落 

分 类 号：X511[环境科学与工程—环境工程]