EPS对活性污泥絮凝沉降性能与表面性质的影响  

Effect of EPS on flocculation-sedimentation and surface properties of activated sludge

作　　者：张兰河[1,2] 李军[1] 郭静波[3] 贾艳萍[1] 张海丰[1] 

机构地区：[1]东北电力大学化学工程学院,吉林省吉林市132012 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [3]东北电力大学建筑工程学院,吉林省吉林市132012

出　　处：《化工学报》2012年第6期1865-1871,共7页CIESC Journal

基　　金：吉林省科技发展计划应用基础研究项目(20090599);城市水资源与水环境国家重点实验室开放基金项目(QA201013)

摘　　要：采用序批式生物反应器(SBR)处理模拟废水,在葡萄糖作为碳源的条件下,调整进水碳源浓度改变系统内胞外聚合物(EPS)含量,考察EPS的变化对活性污泥絮凝沉降性能及其表面性质的影响。结果表明,当EPS从100mg.L-1提高至500mg.L-1时,出水悬浮固体浓度(ESS)从4.4mg.L-1提高至46.6mg.L-1,污泥容积指数(SVI)从68.55ml.g-1提高至164.35ml.g-1,EPS与ESS、SVI呈正相关(R2分别为0.9916和0.9451)。污泥絮体重新絮凝能力(FA)从44.8%下降至17.9%,区域沉降速率(ZSV)从11.2m.h-1下降至3.2m.h-1,EPS与FA、ZSV呈负相关(R2分别为-0.9941和-0.9805)。污泥表面Zeta电位从-12.09mV下降至-37.21mV,污泥相对疏水性RH从44.11%下降至19.31%,EPS与Zeta电位、RH呈负相关(R2分别为-0.9524和-0.9979)。Effect of extracellular polymer substances（EPS）on flocculation-sedimentation and surface properties of activated sludge were investigated in a sequencing batch bioreactor（SBR）for treatment of simulated wastewater at various EPS concentration which was achieved by adjusting concentration of influent glucose as carbon source.The results show that when EPS is increased from 100 mg·L-1 to 500 mg·L-1,sludge volume index（SVI）is improved from 68.55 ml·g-1 to 164.35 ml·g-1,and suspended solids（ESS）in effluent from 4.4 mg·L-1 to 46.6 mg·L-1.There is positive correlation between EPS and ESS as well as SVI（R2 is 0.9916 and 0.9451,respectively）.And meantime,the sludge floc weight capacity（FA）is decreased from 44.8% to 17.9% and regional subsidence rate（ZSV）from 11.2 m·h-1 to 3.2 m·h-1.There is negative correlation between EPS and FA as well as ZSV（R2 is-0.9941 and-0.9805,respectively）.Furthermore,the sludge Zeta potential is decreased from-12.09 mV to-37.21 mV and relative hydrophobicity（RH）from 44.11% to 19.31%,and there is negative correlation between EPS and Zeta potential as well as RH（R2 is-0.9524 and-0.9979,respectively）.

关 键 词：胞外聚合物 序批式生物反应器 絮凝沉降性能 表面性质 

分 类 号：X703.1[环境科学与工程—环境工程]