污水处理厂除砂系统运行调控优化  

Optimization of Operation and Control of Grit Removal System in Wastewater Treatment Plant

作　　者：董志杰[1,2] 庞子山 吉芳英[1,2] 丁云松 姜宁[1,2] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]重庆大学低碳绿色建筑国际联合研究中心,重庆400045 [3]重庆市渝西水务有限公司,重庆400015

出　　处：《中国给水排水》2015年第21期44-48,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07315-001)

摘　　要：针对重庆市某污水处理厂除砂系统存在运行不稳定,造成沉砂易淤积、砂水分离器溢流水含砂量高等问题,通过调整气提提砂、砂水分离器的运行周期以及采用排砂自动化控制等措施进行调控优化,结果表明,提气量和气压满足提砂要求,优化后的提砂混合液SS从3.395 7 g/L提升到5.956 2 g/L,ISS从1.495 6 g/L提高到2.726 0 g/L,且波动较小。系统旱季日均除砂效率提升了31.6%。砂水分离器溢流水SS和ISS浓度有效降低且变化趋于一致。To solve the problems of unstable operation, easy grit deposition and high grit content in overflow from grit-water separator of grit removal system in a WWTP in Chongqing City, the operation and control of the grit removal system were optimized by adjusting the operation cycle of grit air lift and the separator and adopting the automation of grit discharge. The results showed that the air volume and pressure could meet the requirments of grit lift. After the optimization, the SS concentration in grit lift mixture increased from 3. 395 7 g/L to 5. 956 2 g/L, and ISS increased from 1. 495 6 g/L to 2. 726 0 g/ L, with minor fluctuations. The daily average grit removal efficiency was improved by 31.6% in dry season. The concentrations of SS and ISS in overflow of the separator were decreased effectively, and the change tended to be consistent.

关 键 词：旋流沉砂池 除砂系统 运行调控优化 除砂量 

分 类 号：X703[环境科学与工程—环境工程]