FeCl_(3)溶液调理下的污泥固结压缩特性研究  

Study on Sludge Consolidation and CompressionCharacteristics Considering Secondary Consolidation Effect

作　　者：朱瑾彦 李磊[1] 鲁旭 刘帅 Zhu Jinyan;Li Lei;Lu Xu;Liu Shuai(School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China;Southwest Electric Power Design Institute,Chengdu 610057,China)

机构地区：[1]河海大学地球科学与工程学院,江苏南京211100 [2]西南电力设计院,四川成都610057

出　　处：《环境科学与管理》2024年第5期79-84,共6页Environmental Science and Management

基　　金：南京市建设行业科技计划项目(Ks2134)。

摘　　要：填埋是污泥处置的途径之一,污泥具有高含水量、高有机质等特点,其堆填体极易出现失稳破坏,从而引起工程地质灾害,因此亟需提高污泥堆填体的稳定性。通过对原状污泥和不同浓度下的FeCl_(3)调理污泥开展室内试验,研究污泥的固结前后的含水率、有机质含量、压缩特性、固结特性,为污泥堆填体的沉降及稳定评价提供理论依据。结果表明,FeCl_(3)溶液调理后的污泥固结系数显著提升,污泥的次固结变形量占比达68%。污泥经固结后含水率大幅降低,固结前后有机质降低3%~6%。10%的FeCl_(3)调理污泥的压缩系数变化高达50倍。采用FeCl_(3)调理污泥能够有效对污泥堆填体进行加固。Landfill is one of the ways of sludge disposal.The sludge is characterized by high water content and high organic matter.Sluge landfills will is unstable,which will cause engineering geological disasters.Therefore,it is urgent to improve the stability of sludge landfills.Laboratory tests were carried out on undisturbed sludge and FeCl_(3) conditioning sludge at different concentrations to study the moisture content,organic matter content,compression characteristics and consolidation characteristics of sludge before and after consolidation to providing a theoretical basis for the settlement and stability evaluation of sludge landfills.The results showed that the sludge consolidation coefficient was significantly improved after FeCl_(3) solution conditioning,and the secondary consolidation deformation of sludge accounted for 68%.After consolidation,the moisture content of sludge was significantly reduced,and the organic matter before and after consolidation was reduced by 3%~6%.The compressivity of 10%FeCl_(3) conditioned sludge changes by up to 50 times.Sludge conditioning with FeCl_(3) can effectively strengthen the sludge landfills.

关 键 词：污泥 FeCl_(3)溶液 固结 次固结 

分 类 号：X705[环境科学与工程—环境工程]