水资源的缺乏正迫使城市不得不进行调水或进行海水淡化。那么是否可以将污水处理厂处理后的水作为地方供水的一种经济有效的方式?城市中消耗的清洁水中大约有一半流入到污水管网进而进入污水处理厂,然后进行处理返回到自然环境。传统的污水处理厂设计成将污水处理到一定的标准,然后排入自然水体,确保不会影响环境或对公众健康带来影响。在世界许多地方,充足的淡水供应越来越难,水资源的缺乏迫使城市进行长距离的调水,能耗非常之高。例如 Lack of water is forcing cities to divert water or sea water desalination. Is it possible to treat the treated water as a cost-effective local water supply? About half of the clean water consumed in the city flows into the sewer network and into the wastewater treatment plant and is then returned to the natural environment. Traditional sewage treatment plants are designed to treat wastewater to a certain standard and then discharged into natural water to ensure that it does not affect the environment or affect public health. In many parts of the world, adequate supply of freshwater is becoming more and more difficult, and the lack of water resources has forced cities to divert water over long distances, resulting in very high energy consumption. E.g