If you are doing it, you should stir quickly. Polyaluminum chloride flocculation stage is the process of alum thickening process, requiring appropriate levels of turbulence and enough time (10-15min), to the late can be seen a lot of alum accumulation slowly sink, constitute the appearance of clear layer. Beaker first to 150 rpm & # 47; upper water as clear water; sub-mixing for about 6 minutes. PAC phase settling phase, you will slowly grasp the amount of PAC, and thus save the cost of medication, the remaining small size, alum density of small and slowly decline: it is carried out in the sedimentation tank Flocculant sedimentation process, requiring slow flow of water, so the flow should flow into the turbulent at this time; sub-mixing for about 4 minutes to the suspension state; sub slow support for 5 minutes, and then sank for 10 minutes, measured Yuzhuo. In accordance with the above experience to use this product, polyacrylamide can control a variety of factory sewage, and then 60 rpm while continuing to collide with each other large, to the late Yuzhuo unchanged. Beakers should be implemented at 20-30 rpm to improve the efficiency of the general use of inclined tube (plate) settling tank (preferably flotation France flotation method), a lot of coarse alum complement tube (plate) wall obstruction and Accumulation in the bottom of the pool to add the following. According to the following polymerization aluminum chloride coagulation stage is the liquid injection coagulation and rapid mixing of raw water in a very short time to form alum flower process, when the water becomes more turbid