城市再生水利用风险评价指标体系初探

水的再生利用是破解我国水资源短缺问题的重要途径之一,但是再生水利用对人体健康和环境的影响也是生活污水处理必须面对的挑战,从而受到人们普遍关注。根据我国再生水回用途径和天津市纪庄子再生水厂的出水水质情况,构建了再生水利用风险评价指标体系(包括健康风险指标和生态环境风险指标),并对纪庄子再生水厂的出水与景观用水和地表水分别进行了风险评价,得出再生水用在不同用途时存在的不同环境风险。

Discussion of Risk Assessment Index System of Utilization of Urban Reclaimed Water

An evaluation index system was developed based on the reuse approaches and quality of reclaimed water from Jizhuangzi reclaimed wastewater treatment plant in Tianjin, and this index system can be used to performed the risk assessment of the reclaimed water from the landscape water and surface water. The environmental risks for the use of reclaimed water under different conditions were obtained, which can provide a better evaluation of the environmental risks of utilization of reclaimed water. The risk assessment index system of urban reclaimed water (including the health risk index and ecological environmental risk index) can provide references for the evaluation of reuse of urban reclaimed water.