再生水回用于工业冷却中有机污染物健康风险研究

Study on health risk from organic pollulants in industrial cooling in reclaimed water reuse

建立了工业循环冷却水动态模拟试验系统,采集和分析了再生水在冷却塔热质交换过程中逸散到空气中的有机污染物,运用剂量-反应暴露评价模型,开展了空气中有机污染物对冷却塔周边工作的典型人群健康风险评估。结果表明,再生水中的有机污染物不会对暴露人群健康造成明显影响,卤代烃对健康风险的影响大于苯系物。城市污水处理厂是优质的再生水水源,应严格控制工业废水接入比例,减少卤代烃等难降解污染物,从源头控制风险。

A dynamic simulation test system of industrial circulating cooling water has been established. The organic pollutants which were dissipated to the air during the course of cooling tower heat exchange from reclaimed water are collected and analyzed. Using the evaluation model of dosage-reaction exposure,health risk assessment for typical human groups who worked near the cooling tower has been carried out. The results indicate that,organic pollutants in reclaimed water cannot cause obvious influence on the health of exposed population groups. The effect of halogenated hydrocarbon on health risk is greater than that of benzene series. Urban sewage plant is the high-quality source of reclaimed water. The introduced proportion of industrial wastewater should be controlled seriously,so as to reduce halohydrocarbon and other bio-refractory pollutants. The risk should be controlled from the water sources.