水电工程砂石加工生产废水沉降性能研究  

Study on Sedimentation Performance of Wastewater from Sand and Gravel Processing in Hydropower Project

作　　者：翟红娟[1,2] 李方平 贺松 王孟 吴楠 王晓雪 ZHAI Hongjuan;LI Fangping;HE Song;WANG Meng;WU Nan;WANG Xiaoxue(Changjiang Water Resources Commission,Changjiang Water Resources Protection Institute,Wuhan 430051,China;Guodian Jinsha River Xulong(benzilan)Hydropower Development Co.,Ltd,Chengdu 610041,China)

机构地区：[1]长江水利委员会长江水资源保护科学研究所,湖北武汉430051 [2]国电金沙江旭龙(奔子栏)水电开发有限公司,四川成都610041

出　　处：《水处理技术》2021年第12期116-119,共4页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(41201558)。

摘　　要：针对花岗岩作为水电工程建设中较常见的砂石骨料,生产加工过程中产生废水悬浮物(SS)含量高、处理难度大的问题,开展砂石加工系统生产废水沉淀实验,研究废水中SS的自然沉降和絮凝沉降性能。结果表明,经30 min自然沉降后,废水中SS去除率可达95%,24 h后废水SS去除率达99.86%;在絮凝沉降实验中,加入PAM后,废水中SS沉降速率最快,仅需50 s左右即能完成沉降,加入PAC后,SS的质量浓度可降至10 mg/L;PAM、PAC的质量浓度分别在3、300 mg/L时沉降效果明显。Granite,as a common aggregate of sand and stone in hydropower project construction,has a high content of suspended solids(SS)in the wastewater produced under the production and processing.The sedimentation experiment of wastewater from the sand and gravel processing system was carried out to study the natural sedimentation and flocculation sedimentation performance of SS in wastewater.The results show that the SS removal rate in wastewater can reach 95%after 30 min of natural sedimentation,and then the SS removal rate can reach 99.86%after 24 h.The settling rate of SS in wastewater is the fastest after adding PAM,which only takes about 50 s to complete the sedimentation.The mass concentration of SS can be reduced to 10 mg/L after adding PAC.The sedimentation effect is obvious when the mass concentration of PAM and PAC is 3 mg/L and 300 mg/L,respectively.

关 键 词：花岗岩 砂石加工系统 沉降性能 废水处理 水电工程 

分 类 号：X773[环境科学与工程—环境工程]