暗网网站直接打开免费的_久久久国产精品va麻豆天美_女女sm百合调教惩罚h拉拉_华丽的外出在线观看韩剧_最新亚洲人成在线观看_香蕉午夜精品视频_女主播的yin荡日子(h)_综合激情欧美亚洲另外类自拍_日本三级在线不卡网站_a级毛片免费福利

Since the first use of aluminum sulfate in feedwater treatment and patents in the United States at the end of the 19th century, aluminum sulfate has been widely used for excellent coagulation sedimentation performance. Aluminum sulfate is currently the most used flocculant in the world, with an annual output of about 5 million tons of aluminum sulfate, nearly half of which is used in water treatment. Commercially available aluminum sulfate has two forms of solid and liquid, and the solid is divided into two types according to the content of insoluble matter. The solid product which is commonly used in drinking water purification in China is a complex of aluminum sulfate and potassium sulfate. Salt, but not much in industrial water and wastewater treatment.