不同絮凝剂对污水中无机砂的去除效能研究  

Study on the removal efficiency of different flocculants on sand-containing wastewater

作　　者：刘丰畅 龚文静 吉晓鹏 王妙灵 文泽宇 潘伟亮[1] LIU Fengchang;GONG Wenjing;JI Xiaopeng;WANG Miaoling;WEN Zeyu;PAN Weiliang(Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission,Chongqing Jiaotong University,Chongqing 400074,China;School of Building Management,Chongqing Metropolitan College of Science and Technology,Chongqing 402167,China;Chongqing Drainage Co.,Ltd.,Chongqing 400012,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]重庆城市科技学院建筑管理学院,重庆402167 [3]重庆市排水有限公司,重庆400012

出　　处：《应用化工》2024年第11期2684-2689,共6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);重庆市研究生联合培养基地(JDLHPYJD2022005);企业委托项目(E1220238)。

摘　　要：污水处理厂现有工艺中沉砂池存在细小无机砂颗粒去除难的问题。以化学絮凝辅助除砂,研究了无机絮凝剂、人工合成有机高分子絮凝剂和天然有机高分子絮凝剂三类药剂在分别投加至低、高砂模拟废水及污水厂原水的处理效果。结果表明,壳聚糖作为单一絮凝剂对各废水上清液含砂量以及粒径大于50μm的悬浮固体的去除效果较佳;对低、高砂模拟废水上清液含砂量分别从130 mg/L降至31.8 mg/L和240 mg/L降至31.3 mg/L,平均去除率分别达到75.5%和86.9%。In the existing process of sewage treatment plant,the grit chamber has the problem of difficult removal of fine inorganic sand particles.Chemical flocculation was used to remove fine sand.The treatment effects of inorganic flocculant,synthetic organic polymer flocculant and natural organic polymer flocculant on simulated wastewater with low and high sand content and raw water of sewage treatment plant were introduced.The result showed that the use of chitosan(CTS)as a single flocculant had a better removal effect on the sand content of the supernatant of each wastewater and the suspended solids with a particle size greater than 50μm.The sand content of the supernatant of simulated wastewater with low and high sand content decreased from 130 mg/L to 31.8 mg/L and 240 mg/L to 31.3 mg/L,respectively,and the removal rate reached 75.5%and 86.9%,respectively.

关 键 词：无机砂 无机絮凝剂 人工合成有机高分子絮凝剂 天然有机高分子絮凝剂 

分 类 号：TQ085.412[化学工程] X703[环境科学与工程—环境工程]