山区隧道施工废水的水泥混凝处理研究  

Treatment of Effluents from Tunnel Construction by Coagulation of Cement

作　　者：朱旻航[1,4] 陈玉成[1,2] 蒋红梅[3] 

机构地区：[1]西南大学资源环境学院 [2]重庆市农业资源与环境重点实验室,重庆400716 [3]国家山区公路工程技术研究中心,重庆交通科研设计院,重庆400067 [4]宁波市环境监测中心,江苏宁波315012

出　　处：《环境科学与技术》2011年第7期90-93,共4页Environmental Science & Technology

基　　金：西部交通建设科技项目资助(200731874011)

摘　　要：采用水泥混凝处理重庆山区某隧道施工废水。结果表明,随着水泥投加量的增加,出水pH显著升高,电导率则先减后增;水泥投加量1 g/L,沉降时间30 min时,SS平均去除率93.92%,出水浓度68 mg/L;最佳沉降时间控制在3060 min;SS去除率随着初始浓度提高而逐渐上升;废水总COD、TP主要由SS贡献,水泥去除效果较好,但对溶解态营养盐、溶解态COD去除效果不佳。Effluents from tunnel excavation are usually contaminated with SS,COD and petroleum oil and can be purified by coagulation.Thus an experiment was conducted using cement instead of conventional coagulants.The experimental results showed that with the addition of cement pH of the wastewater rose and conductivity dropped and then rose afterwards,and removal of SS could reach up to 93.92%under the condition of dosing 1 g/L of cement and sedimentation of 30 min.The removal of SS was accompanied by removals of COD and TP in the wastewater simultaneously,but it seemed that coagulation of cement was inefficient for removing soluble COD and nutrient salts.

关 键 词：水泥 隧道施工废水 混凝 

分 类 号：X703[环境科学与工程—环境工程]