序批式膜生物反应器处理生活污水的特性  

Characteristics of membrane sequencing batch reactor for domestic wastewater treatment

作　　者：赵英[1] 白晓琴[1] 张颖[1] 顾平[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072

出　　处：《化工学报》2005年第11期2195-2199,共5页CIESC Journal

基　　金：国家高技术研究发展计划资助项目(2002AA601240).~~

摘　　要：研究了中试规模序批式膜生物反应器处理生活污水的特性.发现其对CODCr、NH3-N及TN的去除效果可分别达到95·0%、96·3%及38·0%;过膜阻力增加率为1·032kPa·m-1.TN去除率偏低的主要原因在于缺少搅拌装置,在静置阶段时,污泥大部分沉积在反应器底部(系统运行期间30min沉降比均低于40%),从而使反硝化细菌不能充分与水溶液中的NOx-N接触.采用空间排阻液相色谱法对混合液及膜污染物进行分子量分布测定,发现大量大分子物质在反应器内、膜面及膜孔内积累,相对分子质量大于104的有机物分别占64·0%、38·0%.经过物理及化学清洗,膜通量恢复了73·4%,多糖含量为清洗前的30·4%,说明多糖是造成不可逆污染的主要物质.The characteristics of pilot-scale membrane sequencing batch reactor （MSBR） treating synthetic wastewater were studied. The CODcr, NH3-N and TN removal were 95.0%, 96.3% and 38.0% respectively. The reason for low TN removal was lacking agitated equipment. During static phase, most sludge settled to the bottom of reactor （SV〈40%）, and consequently the denitrifying bacteria could not contact with NOx-N completely. The trans-membrane pressure （TMP） rise rate was 1. 032 kPa · m^-1. Molecular weight distribution of mixed liquid and membrane foulants were analyzed by the steric exclusion liquid chromatography method. It demonstrated that the accumulation of macromolecular matter （molecular weight〉10^4） in reactor and membrane were 64. 0% and 38.0% respectively. After physical and chemical washing, membrane specific flux was recovered by 73.4%. The concentration of polysaccharides deposited on the membrane was reduced to 30.4%. Polysaccharide was the important substance to cause irreversible fouling.

关 键 词：序批式膜生物反应器 膜污染 分子量分布 

分 类 号：X703[环境科学与工程—环境工程]