以光催化氧化与生物降解一体式反应器处理苯酚的研究  

Integrated photocatalystic oxidation and biodegradation reactor for phenol treatment

作　　者：王磊[1] 张永明[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2009年第3期303-309,共7页Journal of Shanghai Normal University(Natural Sciences)

基　　金：国家自然科学基金(50678102);高等学校博士学科点专项科研基金(20070270003);上海市重点学科建设项目(S30406);上海师范大学重点学科建设项目(DZL711)

摘　　要：将TiO2催化剂与生物膜组合为一体,开发了一种光催化氧化与生物降解一体式反应器,并用于苯酚的处理.分别比较5种方法降解苯酚的效率,即在单独的光催化氧化、单独的生物方法、先光催化氧化再生物降解、先生物降解再光催化氧化以及光催化氧化与生物降解一体化等条件下的降解效率,重点比较苯酚矿化的程度.结果表明:采用单独的生物方法对苯酚进行降解时,苯酚的降解速率比单独的光催化氧化要快,但两种方法对苯酚的矿化程度较低,即相应的COD去除率小于50%.当光催化氧化/生物降解和生物降解/光催化氧化分别进行分步组合并对苯酚进行降解时,苯酚的降解效率有所提高,相应的COD去除率分别提高到70%和60%.而采用光催化氧化与生物降解一体化方法对苯酚进行处理时,苯酚的降解效率进一步提高,同时COD的去除率高达95%以上.TiO2 photocatalyst was combined with biofilm as one unit to develop a novel reactor integrated photocatalytie oxidation and biodegradation for treatment of phenol. Phenol removal rates were respectively compared by five strategies, that were alone photoeatalytie oxidation, alone biodegradation, biodegradation after photoeatalitic oxidation, photocatalitic oxidation after biodegradation, and simultaneous photoeatalitie oxidation and biodegradation, and phenol mineralization degree was emphasized for comparison. Experimental results indicated that phenol degradation rate was faster by biofilm alone than by photoeatalytic oxidation alone, but the mineralization degree was lower by both the strategies, with corresponding COD removal rate less than 50%. When photocatalytic oxidation / biodegradation and biodegradation / photocatalytic oxidation were successively combined for treatment of phenol, the mineralization degree was to some extent enhanced and corresponding COD removal rate increased to 70% and 60% respectively. The phenol removal rate was increased further when reactor integrated photoeatalytic oxidation and biodegradation was used for treatment of phenol, with the corresponding COD removal rate of over 95% simultaneously.

关 键 词：苯酚 光催化氧化 生物降解 反应器 

分 类 号：X131.2[环境科学与工程—环境科学]