海岛污水处理厂中水回用环境可行性分析—以平潭金井湾污水处理厂为例

基于污水处理厂的特点和区域的规划资料，本研究利用经验系数法、湖泊完全混合衰减方程和二维扩散方程解析解近似方程等方法，分析了平潭金井湾污水处理厂中水回用环境可行性。中水水量和水质可满足湖泊景观用水、冲厕用水、绿化用水、道路洒水等用途; 中水排入湖泊后可以满足相邻海域的环境功能区水质要求。在事故性排放情况下，湖泊出海口处的有小面积水域的水质超过了海域功能区的水质要求，应采取相应措施加强管理，防范事故性排放; 随着城市化的推进和工业的发展，中水用途将更趋于多样化。

Environmental feasibility analysis of reclaimed water reuse in island sewage treatment plant-a case study of Pingtan Jinjingwan sewage treatment plant

Based on the data of the sewage treatment plant and regional planning data, we analyzed the environmental feasibility of reclaimed water reuse for Pingtan Jinjingwan sewage treatment plant by using the empirical model, the complete mixed attenuation equation of the lake and the analytical solution equation of the two-dimensional diffusion equation. The quantity and quality of reclaimed water can meet the needs of lake landscape water, flushing water, greening water and road watering. After the reclaimed water was discharged into the lake and sea, the water quality of the sea can meet the water quality standard of the environmental functional area around the sea area. In case of accidental discharge, water quality of a small area in the adjacent waters exceeded the water quality standard of the sea functional area, so corresponding measures should be taken to strengthen the sewage treatment plant management and prevent accidental discharge. With the development of urbanization and industrialization, the use of reclaimed water will tend to be more diverse.