| EPS对活性污泥絮凝沉降性能与表面性质的影响 |
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| 引用本文： | 张兰河,李军,郭静波,贾艳萍,张海丰. EPS对活性污泥絮凝沉降性能与表面性质的影响[J]. 化工学报, 2012, 63(6): 1865-1871. DOI: 10.3969/j.issn.0438-1157.2012.06.030 |
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| 作者姓名： | 张兰河 李军 郭静波 贾艳萍 张海丰 |
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| 作者单位： | 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 |
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| 基金项目： | 吉林省科技发展计划应用基础研究项目，城市水资源与水环境国家重点实验室开放基金 |
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| 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，出水悬浮固体浓度（ESS）愈小，污泥絮体重絮能力（FA）越大，絮凝效果愈好。随着EPS的增加，ESS和污泥容积指数（SVI）升高，FA和ZSV降低，导致活性污泥絮凝性能和沉降性能下降。EPS与ESS呈正相关，EPS与FA呈负相关（R2分别为0.9916和-0.9941），EPS与SVI呈正相关性，EPS与区域沉降速率（ZSV）呈负相关性（R2分别为0.9451和-0.9805）。同时，EPS的增加对污泥表面性质产生重要影响，EPS的增加导致污泥表面Zeta电位下降，污泥相对疏水性RH逐渐降低。Zeta电位的下降和RH的降低直接引起SVI和ESS增大，导致污泥絮凝沉降性能下降。EPS总量与Zeta电位和RH的相关性系数R2分别为-0.99、-0.9979。
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| 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 |
| 收稿时间： | 2011-10-28 |
| 修稿时间： | 2012-03-09 |
Effect of EPS on flocculation-sedimentation and surface properties of activated sludge |
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| ZHANG Lanhe , LI Jun , GUO Jingbo , JIA Yanping , ZHANG Haifeng. Effect of EPS on flocculation-sedimentation and surface properties of activated sludge[J]. Journal of Chemical Industry and Engineering(China), 2012, 63(6): 1865-1871. DOI: 10.3969/j.issn.0438-1157.2012.06.030 |
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| Authors: | ZHANG Lanhe LI Jun GUO Jingbo JIA Yanping ZHANG Haifeng |
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| Affiliation: | 1 (1School of Chemical Engineering,Northeast Dianli University,Jilin 132012,Jilin,China; 2State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090, Heilongjiang,China;3School of Civil Engineering,Northeast Dianli University,Jilin 132012,Jilin,China) |
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| Abstract: | 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). |
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| Keywords: | extracellular polymeric substances sequencing batch bioreactor flocculation and settlement surface properties |
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