膜生物反应器处理甲苯废气的挂膜实验  

Biofilm Formation of Membrane Bioreactors(MBR) for Toluene Removal

作　　者：曹明福[1] 朱恂[1] 王永忠[1] 廖强[1] 田鑫[1] 苗峻赫[1] 

机构地区：[1]重庆大学工程热物理研究所,低品位能源利用技术及系统教育部重点实验室,重庆400030

出　　处：《应用与环境生物学报》2011年第5期731-735,共5页Chinese Journal of Applied and Environmental Biology

基　　金：国家自然科学基金项目(No.50806086);国家杰出青年基金项目(No.50825602);“211工程”三期建设项目(No.S-09101)资助~~

摘　　要：采用假单胞菌在硅橡胶复合膜生物反应器上进行甲苯废气降解的挂膜启动实验,研究膜生物反应器挂膜启动特性,对挂膜启动过程中循环液吸光度、压力损失、甲苯降解效率和生物膜干重的变化进行考察,并观察挂膜稳定后的生物膜形态.结果表明：挂膜过程主要由生物膜成膜期（0~5 d）、生长期（6~10 d）、稳定期（11~14 d）3个阶段组成.循环液吸光度、反应器内液相压力损失、甲苯降解效率和生物膜干重等参数在成膜期都快速增加;进入膜生长期,循环液吸光度略微下降,而生物膜干重、压力损失和甲苯降解效率都继续增大;在稳定期各参数均趋于相对稳定,稳定后循环液吸光度维持在0.75左右,液相压力损失达到了180 Pa,甲苯降解效率维持在78%以上,生物膜干重为2.25 mg/cm2.试验表明,对循环液吸光度、液相压力损失、甲苯降解效率和生物膜干重等参数的综合分析,可作为膜生物反应器挂膜启动进程的判据.The experiments on the start-up of membrane bioreactors（MBR） inoculated with Pseudomonas putida were conducted for toluene removal in the present study.A composite membrane consisting of a porous polyamide（PA） support layer coated with a very thin dense polydimethylsiloxane（PDMS） top layer was used.The dry weight,OD（D600 nm） of circulation liquid,pressure drop and removal efficiency in MBR were investigated.The results revealed that the start-up progress of MBR consisted of three phases： Biofilm formation period（0~5 d）,development period（6~10 d）,and stabilization period（11~14 d）.The D600 nm of circulation liquid,pressure drop of liquid in MBR,removal efficiency of toluene and dry weight increased rapidly in the biofilm formation period,then the D600 nm decreased while other parameters rose continuously in the development period,and they kept relative stability in the stabilization period of biofilm growth,finally D600 nm,pressure drop of liquid,removal efficiency of toluene and dry weight of the biofilm reached 0.75,180 Pa,78%,2.25 mg/cm2,respectively.It was suggested that the synthetical analysis of the above parameters could be a guideline for practical biofilm formation of MBR.Fig 9,Ref 15

关 键 词：膜生物反应器 生物膜 甲苯废气 生物降解 挂膜 

分 类 号：X701[环境科学与工程—环境工程]