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针对中国西南地区岩溶地下水资源非常丰富、开发利用程度低且水资源供需矛盾又日益突出的现状,采用药剂预处理与膜技术相结合的方法探索了岩溶地下水资源化利用途径。结果表明,Na2CO3和Ca(OH)2预处理+纳滤深度处理是处理高硬度高硫酸盐地下水行之有效的方法,在Na2CO3、Ca(OH)2投加量分别为780、125 mg·L-1且操作压力为0.8MPa时,出水硬度、硫酸盐含量、溶解性总固体含量分别为40、36、193 mg·L-1,p H值为7.45,产水率为70.59%。处理后的地下水水质达到《饮用净水水质标准》(CJ 94-2005)要求,且能够满足生产实际需要。
Aiming at the present situation that the karst groundwater resources in Southwest China are very rich, the development and utilization is low, and the contradiction between supply and demand of water resources is increasingly prominent, the way of resource utilization of karst groundwater resources is explored by the combination of chemical pretreatment and membrane technology. The results show that Na2CO3 and Ca (OH) 2 pretreatment + nanofiltration depth treatment is an effective method to treat high hardness and high sulfate groundwater. When the dosage of Na2CO3 and Ca (OH) 2 are 780 and 125 mg · L -1 and operating pressure of 0.8 MPa, the effluent hardness, sulfate content and total dissolved solids content were 40, 36 and 193 mg · L -1, p H value was 7.45 and water production was 70.59%. The treated groundwater quality meets the requirements of “drinking water quality standard” (CJ 94-2005), and can meet the actual production needs.