复配絮凝剂对污水中高浓度细砂的去除效果分析  

Analysis of removal effect of flocculant compound on high concentration fine sand in sewage

作　　者：钱庆渝 刘少武 孟捷 扈庆 李新苗 文泽宇 潘伟亮[1] QIAN Qingyu;LIU Shaowu;MENG Jie;HU Qing;LI Xinmiao;WEN Zeyu;PAN Weiliang(Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Water Group Co.,Ltd.,Chongqing 400020,China;Chongqing Sino-French Environmental Excellence R&D Centre Co.,Ltd.,Chongqing 400012,China;China Metallurgical Construction Engineering Group Co.,Ltd.,Chongqing 643000,China)

机构地区：[1]重庆交通大学环境水利工程重庆市工程实验室,重庆400074 [2]重庆水务集团股份有限公司,重庆400020 [3]重庆中法环保研发中心有限公司,重庆400012 [4]中冶建工集团有限公司,重庆643000

出　　处：《应用化工》2024年第10期2302-2307,2314,共7页Applied Chemical Industry

基　　金：重庆市技术创新与应用发展专项重点项目(CSTB2022TIAD-KPX0201-03);重庆市建设科技项目(城科字2021第7-7);企业委托项目(E1220238)。

摘　　要：研究了不同复配种类、不同复配比例对高含砂浓度废水中上清液浊度、含砂量以及粒径的去除效果,并将其用于污水厂实际污水中,观察悬浮固体浓度、上清液浊度、含砂量以及粒径、COD、TN、TP、pH的变化。结果表明,使用复配絮凝剂进行优化后,除砂效果较单一絮凝剂作用时均有所提升。在15 mg/L阳离子型聚丙烯酰胺(CPAM)与15 mg/L壳聚糖(CTS)协同作用下,SS平均去除率达到55.8%,水中含砂量平均去除率72.7%,TN平均去除率41.1%,TP平均去除率70.5%,COD平均去除率49.7%,含砂量与总悬浮固体比值下降15.5%。The removal effects of different compounding types and different compounding ratios on turbidity,sand content and particle size of supernatant in wastewater with high sand concentration were studied.Meanwhile,these compounds were applied to the actual wastewater of wastewater treatment plant to observe the changes of suspended solid concentration,turbidity of supernatant,sand content,particle size,COD,TN,TP and pH.The results showed that the sand removal effect was improved by using the compound flocculant compared with the single flocculant.Under the synergistic action of 15 mg/L cationic polyacrylamide and 15 mg/L chitosan,the average removal rate of SS reached 55.8%,the average removal rate of sand content in water increased to 72.7%,the average removal rate of TN increased to 41.1%,the average removal rate of TP increased to 70.5%,the average removal rate of COD increased to 49.7%,and the ratio of sand content to total suspended solids decreased by 15.5%.

关 键 词：无机砂 化学絮凝 复配絮凝剂 壳聚糖 

分 类 号：TQ421[化学工程] TQ424[环境科学与工程—环境工程] X829