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当前位置: 首页 > 文章 > 生物沥浸污泥EPS的变化规律及对Zeta电位、污泥粒径的影响 江苏农业学报 2017,33 (1) 107-112
Position: Home > Articles > Changes of EPS in bioleaching sludge and the effect on Zeta potential and floc size Jiangsu Journal of Agricultural Sciences 2017,33 (1) 107-112

生物沥浸污泥EPS的变化规律及对Zeta电位、污泥粒径的影响

作  者：
刘杰;齐建华;韩士群;周庆
单  位：
江苏省农业科学院农业资源与环境研究所;中国核电工程有限公司河北分公司
关键词：
生物沥浸;胞外聚合物;Zeta电位;污泥粒径
摘  要：
本研究以氧化硫硫杆菌生物沥浸提高污泥脱水性能为目的,考察生物沥浸过程中污泥p H值、EPS总量和组成、Zeta电位、粒径等的变化,研究p H值、EPS总量和组成变化对Zeta电位、粒径的影响。结果显示,生物沥浸初期污泥EPS_p、EPS_h减少速度较快,随后减速变缓,EPS_py在整个过程中减少速度较慢;p H值、总EPS含量(EPST)、多糖含量(EPS_(py))、蛋白质含量(EPS_p)、腐殖质含量(EPS_h)均对Zeta电位影响显著,EPST、EPS_p、EPS_h与Zeta电位相互关系为非线性关系,污泥Zeta电位降低是H~+的静电中和作用和EPS电荷减少共同作用的结果;Zeta电位、EPST、EPS_h、EPS_p、EPS_(py)均对生物沥浸污泥粒径影响显著,EPST、EPS_h、EPS_p、EPS_(py)与污泥粒径的相互关系为非线性关系。大量H~+的中和作用、EPS电荷的减少、污泥絮体间空间位阻的降低共同促进了污泥絮体颗粒的增大。
译  名：
Changes of EPS in bioleaching sludge and the effect on Zeta potential and floc size
作  者：
LIU Jie;QI Jian-hua;HAN Shi-qun;ZHOU Qing;Institute of Agricultural Resource and Environmental Sciences,Jiangsu Academy of Agricultural Sciences;China Nuclear power Engineering Co.,Ltd.;
关键词：
bioleaching;;extracellular polymeric substances(EPS);;Zeta potential;;floc size
摘  要：
To improve the sludge dewatering performance by thiobacillus thiooxidans,the changes of p H,total EPS content and EPS components,Zeta potential,floc size of sludge was investigated during bioleaching,and the correlation between p H,total EPS content,EPS components content and Zeta potential,floc size was analyzed. The result indicated that EPS_p、EPS_hsharply decreased at earlier bioleaching,then the decreasing trend became slow. The decreasion of EPS_(py) was slower in the process of bioleaching.pH,EPST,EPS_(py),EPS_pand EPS_hhad significant impact on Zeta potential. The relationships between EPST、EPS_p、EPS_hand Zeta potential were non-linear. Static neutralization of H+and reduction of EPS charges resulted the decrease of Zeta potential. Zeta potential,EPST,EPS_p,EPS_h,EPS_(py) had significant impact on floc size. The relationships between EPST,EPS_h,EPS_p,EPS_(py) and floc size were non-linear. The increasing of floc size was caused by neutralization of H+,reducing of EPS charges and decreasing of steric hindrance between sludge flocs.

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