无机絮凝剂对SBR系统中活性污泥的影响研究

采用序批式活性污泥法（SBR）反应器进行模拟实验，系统地探究了聚合氯化铝（PAC）和聚合氯化铁（PFC）对活性污泥产生的影响.结果表明，PAC、PFC会使得污泥絮体变得紧实且边缘化，絮体中值粒径较未添加时分别增加了34.78%、12.90%.污泥的沉降性能和污泥活性随着PAC、PFC的积累而变差.微生物分泌的EPS含量降低，是因为添加PAC、PFC后微生物活性降低并导致微生物多样性降低.

Effect of the addition of inorganic flocculants on the activated sludge in a SBR system

This study explored the addition of two inorganic flocculants, polyaluminum chloride (PAC) and polyferric chloride (PFC), to the activated sludge in a SBR system. The influences on the sludge shape, floc size, sedimentation performance, biomass, EPS component, microbial activity and diversity were systematically investigated. The results showed that sludge floc were both more compact and marginalized after addition of these two inorganic flocculants. The floc median particle size respectively increased by 34.78% and 12.90% after addition of PAC and PFC.However,the sludge sedimentation performance and sludge activity deteriorated due to the accumulation of PAC and PFC. It was also found that the addition of inorganic flocculants had reduced the microbial activity and diversity, hence deceased the EPS secreted by microorganisms.