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化工学报  2014 

无机调理剂与表面活性剂联合调理对污泥脱水性能的影响

DOI: 10.3969/j.issn.0438-1157.2014.03.042, PP. 1068-1075

Keywords: 废物处理,混凝,表面活性剂,污泥,胞外聚合物,脱水性能

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Abstract:

研究了CaO、PAFC联合表面活性剂预处理对污泥脱水性能的影响。以污泥滤饼含水率和比阻(SRF)作为评价污泥脱水性能的指标,通过测定污泥调理过程中胞外聚合物(EPS)含量、Zeta电位的变化来阐明污泥脱水性能的变化。实验结果表明,十二烷基二甲基苄基氯化铵(1227)的加入导致上清液中EPS含量发生变化,有效降低了SRF和滤饼含水率,提高污泥脱水性能。CaO、PAFC和表面活性剂的联合调理污泥比单独使用表面活性剂的效果更好,CaO、PAFC的投加不仅改善污泥脱水性能,并有助于减少表面活性剂的用量。污泥上清液中EPS及其各组分含量与污泥滤饼含水率、SRF均有较高的相关性,对污泥的脱水性能有重要贡献。实验中确定的最佳污泥调理条件是CaO投加量为66.67mg·(gDS)-1、PAFC投加量为33.33mg·(gDS)-1和表面活性剂投加量为56.25mg·(gDS)-1,污泥滤饼含水率和SRF分别降至69.41%、0.294×1013m·kg-1。

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