911精品国产一区二区在线-最新黄网-中文字幕av免费-偷偷操视频-欧美一级性视频-www操操操-伊人久久超碰-亚洲乱子伦-日日摸日日碰夜夜爽av-人妻精品久久一区二区三区-国产精品夜间视频香蕉

General industrial wastewater solutions

Most industrial wastewater has relatively simple composition, containing only a small amount of organic pollutants, and the treatment process is also relatively simple. Generally, only simple pretreatment (filtration, precipitation, pH adjustment, etc.) and biochemical treatment are needed. Some wastewater contains not only a small amount of organic pollutants but also a small amount of salt, which requires desalination. Generally, evaporation and membrane treatment processes are used, and the effluent can be discharged after biochemical treatment to meet standards or reused.