净水技术2024，Vol.43Issue(z2)：35-42,49,9.DOI:10.15890/j.cnki.jsjs.2024.s2.005
老旧水厂平流池强化沉淀技术的开发及应用
Development and Application of Enhanced Sedimentation Technology for Horizontal Flow Sedimentation Tank of Old WTPs
摘要
Abstract
Advection sedimentation tank is widely used in construction of water treatment plants(WTPs)in China because of its stable operation effect.However,some old WTPs have been built for a long time,and there are widespread problems such as low water production,high turbidity of effluent,high water content of sludge discharge and low safety level of operation.Due to its important role in current water supply system,it is necessary to explore the potential transformation under background of land shortage,incomplete original data and large transformation risk coefficient.At present,several domestic mainstream transformation experiences have obvious limitations,and can not be universally applied to the technical transformation of advection pool of all old WTPs.In order to make up for the gaps in domestic research and renovation experience,this paper systematically studies a series of problems such as sedimentation,sludge discharge and water collection before and after advection pool renovation,and develops an integrated transformation process integrating end reinforcement sedimentation,siphon sludge discharge and end water collection system,in order to solve the technical problems encountered in the renovation of advection pool in old WTPs.After the actual application of the research results in a WTP in southern China,when the turbidity of raw water is from 60 NTU to 125 NTU,the turbidity of effluent can be stabilized below 2.7 NTU,and the average removal rate is about 97.12％.The mean value of CODMn in effluent is 1.48 mg/L.The average value of UV254 effluent is 0.036 cm-1,and the treatment effect was excellent.Compared with the effluent quality of the original sedimentation tank,the turbidity removal effect of the reconstructed sedimentation tank is improved from 70％to 80％,and the water production rate is increased by 20％,which has reached the good operation target,and has certain reference and demonstration significance for the transformation of domestic advection tank.关键词
老旧水厂/平流沉淀池/挖潜改造/强化沉淀/虹吸排泥Key words
old water treatment plants/advection sedimentation tank/explore the potential for reconstruction/enhanced precipitation/siphon out mud分类
土木建筑引用本文复制引用
陈帅朋..老旧水厂平流池强化沉淀技术的开发及应用[J].净水技术,2024,43(z2):35-42,49,9.基金项目
上海市政总院院内科研项目(K2021K050,K2021K052,K2022K051) （K2021K050,K2021K052,K2022K051）
