投加FeSO_4对序批式生物膜反应器中DHA、EPS和处理效果的影响  

Effects of ferrous sulfate(FeSO_4) on dehydrogenase activity(DHA),amount of extracellular polymeric substances(EPS) and the treatment efficiency in a sequencing batch biofilm reactor(SBBR)

作　　者：杨涛[1] 张静[1] 何帅[1] 张悦[2] 马天佑 杨开[1] 

机构地区：[1]武汉大学土木建筑工程学院,武汉430072 [2]水利部长江水利委员会,武汉430072 [3]湖北电力勘测设计院,武汉430072

出　　处：《环境科学学报》2016年第8期2838-2843,共6页Acta Scientiae Circumstantiae

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

摘　　要：针对化学协同生物除磷过程,研究了序批式生物膜反应器(SBBR)中FeSO_4对悬浮相活性污泥脱氢酶活性(DHA)、胞外聚合物(EPS)及系统处理效果的影响.结果表明,少量FeSO_4对DHA和EPS的分泌具有促进作用,但最佳投加量不一致,分别为0.10 mmol·L-1和0.20 mmol·L-1;大量的FeSO_4则会引发抑制.FeSO_4投加量少于0.30 mmol·L-1时会使污泥MLVSS、MLVSS/MLSS增加,超过0.30 mmol·L-1时则使MLVSS、MLVSS/MLSS下降,但MLSS和SVI随着FeSO_4投加量的增加分别持续增加和下降.FeSO_4对COD和TN的去除具有抑制作用,但并不显著,去除率分别在77%和72%左右;TP的去除效果明显改善,在投加量为0.30 mmol·L-1时效果最好.投加FeSO_4协同生物除磷时建议最佳投加量为0.30 mmol·L-1,此时污泥DHA被轻微抑制,但污泥浓度、EPS、TP去除率均已达到最大,出水水质满足一级A排放标准.Effects of ferrous sulfate（FeSO_4） on dehydrogenase activity（DHA）,amount of extracellular polymeric substances（EPS） and the treatment efficiency in a sequencing batch biofilm reactor（SBBR） were investigated.Compared with the controlling stage,without any additions,a small amount of FeSO_4 accelerated the secretion of DHA and EPS,with the optimal dosages of 0.10 and 0.20 mmol·L-1,respectively.While higher amount of FeSO_4 would inhibit the process.Approximately,the concentrations of MLVSS and MLVSS/MLSS increased with increasing FeSO4 dosage less than 0.30mmol·L-1.The concentrations of MLSS increased persistently with increasing FeSO_4 dosage,and SVI changed conversely.The addition of FeSO_4 slightly inhibited the removal efficiencies of COD and TN,which were 77% and 72%,respectively.However,TP removal efficiency obtained a prominent improvement,indicating that biological phosphorus removal of the SBBR system was enhanced by chemical flocculant.The optimal dosage of FeSO_4was0.30 mmol·L-1.Even though the DHA was slightly inhibited,the sludge concentration,amount of EPS and TP removal efficiency were strengthened,and high quality of effluent were achieved.

关 键 词：硫酸亚铁 化学协同除磷 脱氢酶活性 胞外聚合物 

分 类 号：X703[环境科学与工程—环境工程]