阳离子表面活性剂与石灰联合调理对污泥脱水性能的影响  

Effect of cationic surfactants and lime joint action on the dewaterability of sewage sludge

作　　者：于文华[1] 濮文虹[1] 时亚飞[1] 徐鑫[1] 李亚林[1] 张昊[1] 李野 杨昌柱[1] 杨家宽[1] 

机构地区：[1]华中科技大学,环境科学与工程学院,武汉430074 [2]宇星科技发展(深圳)有限公司,深圳518057

出　　处：《环境化学》2013年第9期1785-1791,共7页Environmental Chemistry

基　　金：国家自然科学基金项目(51078162);教育部新世纪人才支持计划项目(NCET-09-0392);深圳市科技研发资金项目(CXY201106210008A);武汉市重点科技攻关项目(201260723226)资助

摘　　要：以污泥比阻(SRF)、污泥毛细吸水时间(CST)和脱水率为评价指标,研究了两种阳离子表面活性剂(A:松香基双-三甲基氯化铵、B:乙撑基双十二烷基二甲基溴化铵)与石灰联合调理对剩余污泥脱水性能的影响.结果表明:(1)两种表面活性剂与石灰联合调理均能产生良好的协同作用,当表面活性剂A、B的投量分别为9 g/100 g干基污泥(DS),石灰投量为15 g/100 g DS时,污泥SRF分别降低为原泥的17.7%和23.0%;污泥CST降至52.3 s和70.5 s,脱水率分别达到了86.9%和84.2%,明显改善了污泥脱水性能;(2)表面活性剂和石灰联合调理对污泥絮体及胞外聚合物产生明显的影响,随着投加量的增加,使得污泥滤液中蛋白质及多糖含量呈增加趋势,联合调理改善了污泥脱水性能.This paper studied the effect of cationic surfactants （rosin-based trimethylammonium, didodecyldimethylammonium bromide） combined with lime on the dewaterability of sewage using some evaluation indexes, i.e., specific resistance to filtration （SRF）, capillary suction time and water removal efficiency. The results showed that both cationic surfactants improved the dewaterability of sewage sludge. SRF and CST decreased with increasing dosages of the cationic surfactants. The combination of cationic surfactants and calcium oxide produced better results, making the sewage sludge more dewaterable. When the dosage of calcium oxide was 15 g per 100 g dry solid and the dosage of cationic surfactants was 9 g per 100 g dry solid, SRF of raw sludge was respectivery decreased to 17.7% and 23.0%; CST of raw sludge reduced to 52.3 s and 70.5 s, and with the water removal efficiency decreased to 86.9% and 84.2%. The surfactant and CaO joint action had a significant impact on the sludge floc and extracellular polymeric substances as the dosage increased, and increased the content of the organic matter, protein and polysaccharide. The improvement in sludge dewaterability was further confirmed by the results from the filter press dewatering experiments in the laboratory.

关 键 词：污泥脱水 阳离子表面活性剂 CAO 脱水率 含水率 

分 类 号：X703[环境科学与工程—环境工程]