污泥性质对动态膜形成与污染的影响  

Effect of sludge properties on membrane formation and fouling in a dynamic membrane bioreactor

作　　者：吴亚南[1] 王晓昌[1] 于真真[1] 胡以松[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西北水资源与环境生态教育部重点实验室,国家城市非传统水资源开发利用国际科技合作基地,西安710055

出　　处：《环境工程学报》2017年第8期4476-4480,共5页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07310-001);国家自然科学基金资助项目(51508450);中国博士后科学基金资助项目(2015M582760XB)

摘　　要：通过分析胞外聚合物(EPS)、污泥形态特征、相对疏水性(RH)和膜污染阻力分布,研究了不同性质污泥(正常污泥、膨胀污泥)对动态膜(DM)形成和膜污染的影响,结果表明,正常污泥由于较大的污泥粒径和相对疏水性动态膜形成较膨胀污泥快,时间分别为25 min和50 min;动态膜反应器运行中主要阻力为泥饼阻力,正常污泥与膨胀污泥泥饼阻力分别占总阻力的83.91%和94.87%,膨胀污泥由于大量丝状菌的存在显著增加了泥饼阻力;膨胀污泥较正常污泥结构松散,形态极不规则,EPS浓度尤其是多糖浓度高于正常污泥,使膨胀污泥的膜污染程度和速率均高于正常污泥。The effect on dynamic membrane（ DM） formation and membrane fouling of normal sludge and bulking sludge was investigated from the viewpoints of extracellular polymeric substances（ EPS）,relative hydrophobicity（ RH）,and the characteristics of floc shapes. The results showed that the DM formation in normal sludge was faster than it was in the bulking sludge due to the larger particle size and higher RH of the normal sludge,and the formation times of the DM in normal sludge and bulking sludge were 25 min and 50 min,respectively.The cake resistance significantly contributed to the filtration resistance,which accounted for 83. 91% and 94. 87% of the total resistance in normal sludge and bulking sludge,respectively. The large number of filamentous bacteria in the bulking sludge resulted in severe cake fouling. Moreover,the comparatively more open and irregular morphology and higher EPS concentration,particularly the carbohydrate concentration,in bulking sludge lead to a more severe fouling propensity and higher fouling rate than normal sludge.

关 键 词：污泥性质 污泥形态 动态膜形成 膜污染 

分 类 号：X703[环境科学与工程—环境工程]