城市污水厂污泥深度脱水中试研究  

A PILOT STUDY ON DEEP DEWATERING OF MUNICIPAL SEWAGE SLUDGE

作　　者：陈婉如 龚丽芳[2,3] 陈繁忠[2] 马迎辉[2,3] 叶挺进 李益洪 

机构地区：[1]佛山市水业集团,广东佛山528000 [2]中国科学院广州地球化学研究所,广州510640 [3]中国科学院研究生院,北京100049

出　　处：《环境工程》2013年第S1期296-298,302,共4页Environmental Engineering

基　　金：中科院佛山市院市合作项目(2010YS005)

摘　　要：佛山镇安污水处理厂污泥原采用离心机脱水方式,脱水后污泥含水率为80%左右,难以满足填埋要求。为解决该问题,开展了污泥深度脱水中试,将浓缩污泥经化学调理后,再用厢式压滤机压滤脱水。中试试验表明:采用有机絮凝剂—无机絮凝剂—生石灰联合调理方法,脱水效果最好,脱水泥饼含水率最低可达33%,无侧限抗压强度可达62.5kPa,抗剪切强度可达46.5 kN/m2。脱水污泥可满足混合填埋和垃圾填埋场覆盖土材料的要求。After centrifugal dewatering,the moisture content of the sludge from Zhen'an Sewage Treatment Plant is about 80%,which is difficult to meet the requirements of landfill. To solve the problem,the pilot test of deep dewatering was carrried out,using the high-pressure membrane filtering to filter and dewater after the chemical conditioning of thick sludge. The results show that after regulating with organic flocculant-inorganic flocculant-quicklime process,the water content in sludge cake can reach 33%,unconfined compressive strength is up to 62. 5kPa,and shear strength can reach 46. 5 kN/m2,which can meet the landfill and landfill cover soil material standards.

关 键 词：污泥 化学调理 深度脱水 厢式压滤机 

分 类 号：X703[环境科学与工程—环境工程]