CPAM及与FeCl_3联用改善污泥脱水性能的研究
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摘要
以上海某污水厂剩余污泥为研究对象,通过测定污泥毛细吸水时间(CST)、沉降性能及含水率等参数研究了不同相对分子质量的CPAM及CPAM与FeCl_3联用对污泥的脱水性能的影响。实验结果表明,在30 mg/L相对分子质量为8×10~6的CPAM(CPAM-B)调理下,污泥脱水性能最好;若污泥所受强剪切作用时间较长,可采用测定CST由减小至增大的转折点的方法,确定最适宜的CPAM-B投加量;CPAM-B与FeCl_3联用的污泥脱水效果优于CPAM-B单独调理。
Taking the excessive sludge of a wastewater plant in Shanghai,China,as the research target,the influences of CPAM with different relative molecular mass and CPAM coupled with FeCl3 on the dewatering capability of sludge have been investigated via the determination of parameters,such as capillary suction time(CST),settleability,and moisture content rate,etc. The experimental results show that the sludge dewatering capability is the best under the conditioning of CPAM with a relative molecular mass of 8×106 at 30 mg/L. However,if the sludge is subjected to strong shearing action for longer shearing time,the optimum CPAM-B dosage can be ascertained by determining the turning point of CST from decreasing to increasing. The sludge dewatering effect of the CPAM-B coupled with FeCl3 is better than that of CPAM-B alone.
Taking the excessive sludge of a wastewater plant in Shanghai,China,as the research target,the influences of CPAM with different relative molecular mass and CPAM coupled with FeCl3 on the dewatering capability of sludge have been investigated via the determination of parameters,such as capillary suction time(CST),settleability,and moisture content rate,etc. The experimental results show that the sludge dewatering capability is the best under the conditioning of CPAM with a relative molecular mass of 8×106 at 30 mg/L. However,if the sludge is subjected to strong shearing action for longer shearing time,the optimum CPAM-B dosage can be ascertained by determining the turning point of CST from decreasing to increasing. The sludge dewatering effect of the CPAM-B coupled with FeCl3 is better than that of CPAM-B alone.
引文
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[12]郑育毅,江娟,孙启元,等.不同分子量及离子度的CPAM对污泥脱水性能的影响研究[J].环境科学学报,2016,36(8):2947-2954.
[13]?rmeci B,Abu-Orf M M. Protocol to measure network strength of sludges and its implications for dewatering[J]. Journal of Environmental Engineering,2005,131(1):80-85.
[2]曹秉帝.城市污水厂污泥化学调理脱水机制的研究[D].西安:西安建筑科技大学,2016.
[3]潘胜. Fenton氧化及厌氧消化对城市污泥脱水性能的影响研究[D].上海:华东理工大学, 2012.
[4]Yuan Haiping,Yan Xiaofei,Yang Caifeng,et al. Enhancement of wawaste activated sludge dewaterability by electro-chemical pretreatment[J]. Journal of Hazardous Materials,2011,187(1/2/3):82-88.
[5]刘欢. F-S复合调理剂对市政污泥脱水性能影响的研究[D].武汉:华中科技大学,2012.
[6]王洪杰,王毅力,Dentel Steven K.调理污泥在剪切测试过程中的絮体与聚集体之间的转化研究[J].环境工程学报,2010,4(12):2662-2668.
[7]Novak J T. Dewatering of sewage sludge[J]. Drying Technology,2006,24(10):1257-1262.
[8]张尧.化工企业污水处理污泥脱水技术研究[D].天津:天津大学,2013.
[9]Zhang Zhiqiang,Xia Siqing,Zhang Jiao. Enhanced dewatering of waste sludge with microbial flocculant TJ-F1 as a novel conditioner[J].Water Research,2010,44(10):3087-3092.
[10]张硕峰.城市剩余污泥调理工艺及其机理研究[D].广州:广东工业大学,2012.
[11]王鑫.调理剂对生活污泥脱水性能影响的研究[D].长沙:中南大学,2012.
[12]郑育毅,江娟,孙启元,等.不同分子量及离子度的CPAM对污泥脱水性能的影响研究[J].环境科学学报,2016,36(8):2947-2954.
[13]?rmeci B,Abu-Orf M M. Protocol to measure network strength of sludges and its implications for dewatering[J]. Journal of Environmental Engineering,2005,131(1):80-85.