YANGHua-xian.Design of Large-scale Waterworks Relocation Project in Karst Mountainous Area[J].China Water & Wastewater,2022,38(22):47-53.
Design of Large-scale Waterworks Relocation Project in Karst Mountainous Area
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第22期
Page:
47-53
Column:
Date of publication:
2022-11-17
- Keywords:
- ozonation and activated carbon adsorption process; sludge slot chamfering; sharing backwash pump house; anti-terrorism design; Karst mountainous area; relocation project
- Abstract:
- Nanjiao waterworks in Zunyi is a large waterworks in Karst mountainous area, which needs to be relocated due to rugged terrain, Karst development, poor groundwater occurrence and easy pollution of water quality. The design scale of the new plant is 10×104 m3/d, and the project is required to conform to class Ⅰ anti-terrorism design technical standard. The advanced treatment process is ozonation and activated carbon adsorption. Two key technologies, namely W-type sludge slot chamfering at the bottom of the flocculation horizontal flow sedimentation tank and stacking the clear water tank, and carbon filter and sand filter sharing backwash pump house and embedding carbon filter, were firstly adopted in the purification units. The operation results showed that the effluent quality of the new plant was good, and high removal efficiency of organic matter was obtained. The CODMn in effluent was 0.87-1.97 mg/L (less than 3 mg/L), NH3-N was 0.04-0.19 mg/L (less than 0.5 mg/L), turbidity was 0.17-0.3 NTU (less than 1 NTU) and chroma <5 degrees (less than 15 degrees). The product water quality stably met the limits specified in Standards for Drinking Water Quality (GB 5749-2006), which belonged to the category of high quality water.
Last Update:
2022-11-17