摘要
为提升自来水厂排泥水处理系统运行效率,降低水厂耗水率,开展排泥水预处理试验和浓缩池动态模型试验。结果表明:与预处理前相比,投加0.3 mg/L阳离子型PAM,可以使排泥水中粒径小于5μm的颗粒占比减少22%,粒径大于10μm的颗粒占比提高110%,颗粒沉降速率提高20%,上清液浊度下降75%。根据浓缩池动态模型试验结果对浓缩池进水流量、斜板间距、刮泥机转速提出了优化建议,为改善浓缩池水力条件和絮凝条件、提高系统处理效率提供了参考依据,对于提高水资源利用率、减小环境风险具有积极意义。
To improve the operating efficiency of the sludge water treatment system, the pretreatment experiment and dynamic model experiment of concentration tank were carried out. With the addition of 0.3 mg/L cationic PAM, the proportion of particles with size less than 5 μm in the sludge water reduced by 22% and the proportion of particles with size larger than 10 μm increased by 110%. The settling rate of particles increased by 20% and the turbidity of supernatant decreased by 75%. According to the experimental results of concentration tank model the suggestions on the optimization were made. It is suggested that the influent flow and the inclined plate space and the speed of mud scraper should be adjusted to the appropriate values. It provided references for improving the hydraulic and flocculation conditions of the concentration tank. Therefore, the operation efficiency of the concentration tank could be improved. The research conclusion has positive significance for improving the utilization rate of water resources and reducing the environmental risk.
作者
吴玮
季倩
许晓毅
张如锋
WU Wei;JI Qian;XU Xiaoyi;ZHANG Rufeng(School of EnvironmentaI Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Suzhou Planning and Design Institute Co.,Ltd.,Suzhou 215006,China)
出处
《给水排水》
CSCD
北大核心
2022年第1期56-62,共7页
Water & Wastewater Engineering
基金
水体污染控制与治理科技重大专项(2017ZX07201001)。
关键词
排泥水
沉降性能
预处理
含固率
运行优化
Sludge water
Settling performance
Pretreatment
Solid content
Operation optimization
