喀斯特山区大型水厂迁建工程设计

Design of Large-scale Waterworks Relocation Project in Karst Mountainous Area

遵义南郊水厂为喀斯特山区大型水厂,由于喀斯特山区地形崎岖、岩溶发育、赋水条件差、水质易受污染,故需迁建。迁建新厂设计规模10×10^(4)m^(3)/d,依照Ⅰ类反恐设计技术标准,采用臭氧-活性炭深度处理工艺,净水单元首次采用了网格絮凝平流沉淀池底“W”型泥槽倒角并叠建清水池、炭滤池与砂滤池共用反冲洗泵房并嵌入炭滤池两项关键技术。运行结果表明,新厂出水水质优良,有机物去除效果好,出水COD_(Mn)为0.87~1.97 mg/L(<3 mg/L)、NH_(3)-N为0.04~0.19 mg/L(<0.5mg/L)、浊度为0.17~0.3 NTU(<1 NTU)、色度<5度(<15度),稳定达到《生活饮用水卫生标准》(GB5749—2006),属于优质水范畴。

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 10×10^(4)m^(3)/d,and the project is required to conform to classⅠanti-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 COD_(Mn)in effluent was 0.87-1.97 mg/L(less than 3 mg/L),NH_(3)-N was 0.04-0.19 mg/L(less than 0.5 mg/L),turbidity was 0.17-0.3NTU(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.