Al^(3+)对序批式生物膜反应器(SBBR)中污泥脱氢酶活性(DHA)和胞外聚合物(EPS)的影响  

Effects of Al^(3+) on dehydrogenase activity(DHA ) and extracellular polymeric substances (EPS) of activated sludge in a sequencing batch biofilm reactor (SBBR)

作　　者：杨涛 郝学凯 陈宝玉 陈永祥 张悦 杨开[3] YANG Tao1 , HAO Xuekai1 ,CHEN Baoyu1 ,CHEN Yongxiang1 , ZHANG Yue2, YANG Kai3(1. Wuhan Municipal Engineering Design and Research Institute Co. Ltd., Wuhan 430023 ;2. Changjiang Runjia Real Estate Co. Ltd., Wuhan 430010 ;3. School of Civil Engineering, Wuhan University, Wuhan 43007)

机构地区：[1]武汉市政工程设计研究院有限责任公司,武汉430023 [2]长江润嘉置业有限责任公司,武汉430010 [3]武汉大学土木建筑工程学院,武汉430072

出　　处：《环境科学学报》2018年第4期1453-1459,共7页Acta Scientiae Circumstantiae

基　　金：国家"十二五"科技支撑计划(No.2014BAL04B04;2015BAL01B02)~~

摘　　要：通过向序批式生物膜反应器(SBBR)中投加氯化铝,研究了化学协同生物除磷过程中Al^(3+)对污泥脱氢酶活性(DHA)、胞外聚合物(EPS)及系统处理效果的影响.结果表明,氯化铝投加量少于0.1 mmol·L^(-1)时,Al^(3+)对微生物的活性有促进作用,多于0.1 mmol·L^(-1)的Al^(3+)对其活性有明显的抑制作用.氯化铝投加量少于0.1 mmol·L^(-1)时,Al^(3+)能够促进EPS中多糖(PS)和蛋白质(PN)的分泌,多于0.1 mmol·L^(-1)的Al^(3+)则只促进多糖的分泌,但对EPS的分泌总量没有影响.Al^(3+)会使污泥的SVI值显著降低,大大改善其沉降性能.MLSS、MLVSS基本上是随着Al^(3+)投加量的增加而增大,MLVSS/MLSS随着投药量的增加先减小后增大再减小.Al^(3+)对COD和TN的去除具有轻微抑制作用,但对TP的去除具有显著的改善作用.当Al^(3+)的投加为0.5 mmol·L^(-1)时,TP的去除效果最好,出水浓度仅为0.44 mg·L^(-1),满足一级A排放标准.此时,TP的去除率为92.7%,比不加药时提升了10.2%.Effects of Al^（3＋）on a sequencing batch biofilm reactor（ SBBR） were investigated by adding aluminum chloride. Dehydrogenase activity（ DHA）,extracellular polymeric substances（ EPS）,and reactor performance were evaluated. The results indicated that less than 0.1 mmol·L^（-1） Al^（3＋）would promote the activity of dehydrogenase and the secretion of EPS,while an excessive dosage above 0.1 mmol·L^（-1） Al^（3＋）would inhibit the activities. When the dose of Al^（3＋）was lower than 0.1 mmol·L^（-1）,the secretions of polysaccharide（ PS） and protein（ PN） were enhanced. When the dose of Al^3＋was higher than 0.1 mmol·L^-1,the secretion of PS was increased,but the secretion of EPS did not change. Al^3＋would obviously decrease the sludge volume index（ SVI）value and improve the settle ability. Moreover,the concentrations of mixed liquor volatile suspended solid（ MLVSS） and mixed liquor suspended solids（ MLSS） increased with increasing Al^3＋,while the MLVSS/MLSS ratio firstly decreased then increased and then decreased with increasing Al^3＋. Al^3＋slightly depressed chemical oxygen demand（ COD） and total nitrogen（ TN） removal efficiencies,while enhanced total phosphorus（ TP） removal efficiency. When the dose of Al^3＋was 0.5 mmol·L^-1,the concentration of TP in effluent was 0.44 mg·L^-1,which was in accordance with the A classrequirement of sewage discharge standard. Thus,the removal efficiency of TP was 92.7%,which was increased by 10.2% without Al^3＋.

关 键 词：氯化铝 生化协同除磷 污泥性质 脱氢酶活性 胞外聚合物 

分 类 号：X172[环境科学与工程—环境科学]