From the plant the treated water flows out as effluent,which may be pure water, in a large pipe called the Outfall to a river or the sea or to farms.

• 排出水指从污水处理厂排出的水，经过处理也许会成为洁净水。它流人叫做排放管的巨大管道而排放入河流，海洋或农田里。