аⅴ天堂最新版在线中文丨久久天天躁狠狠躁夜夜躁2o2o丨国产人妻精品无码av在线丨强伦姧人妻三上悠亚中文字幕丨国产亚洲欧美一区二

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.