盐度对序批式生物反应器污泥膨胀的影响  

Effect of different salinity on sludge bulking by using sequencing batch reactor

作　　者：贾艳萍[1] 王山山[1] 张兰河[1] 王旭明[2] 郭静波[3] 

机构地区：[1]东北电力大学化学工程学院,吉林132012 [2]北京农业生物技术研究中心,北京100089 [3]东北电力大学建筑工程学院,吉林132012

出　　处：《农业工程学报》2013年第19期112-119,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：吉林省科技发展计划项目-社会发展重点项目(20110405);吉林省教育厅"十二五"科学技术研究项目(吉教科合字[2012]第95号);吉林市科技支撑计划杰出青年培养专项(2013625008)

摘　　要：为了研究盐度对污泥膨胀的影响，采用序批式生物反应器（sequencingbatchreactor，SBR）处理含盐废水，考察NaCl、Na2S04和Na3P04盐度变化对污泥沉降性和污染物去除效果的影响。结果表明，当NaCl和Na2S04盐度由0升高至30∥L时，污泥容积指数（sludgevolumeindex，SVI）由135mL／g下降至71～73mL／g，总氮（totalnitrigen，TN）去除率由80％下降到60％，胞外聚合物（extracellularpolymericsubstance，EPS）质量浓度由521～523mg／L升高到896~917mg／L，污泥沉降性良好；当Na3P04盐度由0升高至8g/L时，SVI由135mL／g升高至198mL／g，TN去除率由80％下降至60％，EPS质量浓度由549mg／L升高到674mg／L，发生污泥膨胀。随着NaCl和Na2SO。盐度的提高，污泥沉降性能提高，TN去除率下降，EPS质量浓度升高。随着Na3P04盐度的提高，污泥沉降性能和TN去除率均下降，EPS质量浓度升高。然而，随着NaCl（30～0g／L）、Na2S04（30～0g／L）和Na3P04（8～0g／L）盐度的降低，SVI值分别由71mL／g升高至298mL／g，73mL／g升高至291mL／g和198mL／g升高至241mL／g，TN去除率分别由62％下降至43％，65％下降至44％，70％下降至35％，EPS质量浓度分别由917mgm升高至1092mg／L，896mg／L升高至1078m肌，674mg／L升高至759mg／L。随着NaCl、Na2S04和Na3P04盐度由高降低后，污泥沉降性能和TN去除率均下降，EPS质量浓度继续升高，盐度降低后发生了污泥膨胀。As one of the most significant factors influencing the settling properties of the activated sludge, the effects of various salinities and their changes on sludge bulking were investigated by applying wastewaters containing different kinds of salinity in a sequencing batch reactor （SBR）. The influences of salinities induced by NaC1, Na2SO4 and Na3PO4 on the removal efficiency of pollutants and the settleability of the activated sludge were analyzed by utilizing sodium acetate as sole carbon source. The performances of the SBR fed with NaC1 salinity （increased gradually from 0 to 30 g/L） when the dissolved oxygen （DO） concentration was 3 mg/L were as follows： the sludge volume index （SVI） dropped from 135 mL/g to 71 mL/g; the removal efficiency of the total nitrogen （TN） dropped from 80% to 60%; The extracellular polymeric substance （EPS） increased from 521 to 917 mg/L; And the sludge showed a good settleability. When the Na2SO4 salinity increased gradually from 0 to 30 g/L, the SVI dropped from 135 to 73 mL/g, the TN removal efficiency dropped from 81% to 60% and the EPS increased from 523 to 896 mg/L. By comparison, when the Na3PO4 salinity increased gradually from 0 to 8 g/L, SVI increased from 135 to 198 mL/g, the removal efficiency of TN dropped from 80% to 60% and the EPS increased from 549 to 674 mg/L, which led to sludge bulking. It demonstrated that when the NaC1 and Na2SO4 salinity increased, the removal efficiency of TN decreased, while the sludge settleability was improved and the EPS concentration increased. For system fed with increasing Na3PO4 salinity, the sludge settleability and the removal efficiency of TN decreased, while the EPS concentration increased. Meanwhile, with the decreasing salinity of NaC1 （30-0 g/L）, Na2SO4 （30-0 g/L） and Na3PO4 （8-0 g/L）, SVI increased from 71 to 298 mL/g, 73 to 291 mL/g and 198 to 241mL/g, respectively, the respective TN removal efficiency dropped from 62% to 43%, 65% to 44% and 70% to 35% and the EPS concentration increased f

关 键 词：盐度 污泥处理 脱氮 沉降性能 污泥膨胀 

分 类 号：X703.1[环境科学与工程—环境工程]