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L水厂是内蒙古自治区B市市区的主要供水厂,供水能力为4.4×104m3/d,目前水厂仅设置无阀滤池用于去除原水中的铁、锰,而对砷的去除效果较差。针对L水厂现有工艺状况及出水水质特征,采用投加除砷药剂后对管式静态混合器、跌水曝气、过滤等工艺进行改造。实际运行结果表明,改造后工艺出水中砷、铁、锰及浊度数值分别稳定在9μg/L、0.05 mg/L、0.02 mg/L、0.4 NTU以内,均满足现行《生活饮用水卫生标准》(GB 5749—2006)。此外,工艺改造成本约为15元/m3,运行成本增加值<0.01元/m3。
L Water Plant is the main water supply plant in downtown B of Inner Mongolia Autonomous Region with a water supply capacity of 4.4 × 104m3 / d. At present, only the valveless filter is installed in the water plant to remove iron and manganese from the raw water, difference. In view of the existing process conditions and effluent quality characteristics of L waterworks, the process of retrofitting tubular static mixer, water drop aeration, filtration and the like is retrofitted by adding and removing arsenic chemicals. The actual operation results showed that the arsenic, iron, manganese and turbidity values in the treated effluent were respectively stabilized at 9μg / L, 0.05mg / L, 0.02mg / L and 0.4 NTU, all of which met the current “drinking water health standards” (GB 5749-2006). In addition, the process of transformation costs about 15 yuan / m3, operating costs added value <0.01 yuan / m3.