What are the scope of application of PAC? Polyaluminum chloride in the production of wastewater flocculation and sedimentation have significant results; the other white polyaluminium chloride is a high-end product of flocculant in the water, are food-grade polyaluminum chloride, but also used in pharmaceuticals and cosmetics, Beauty industry to do raw materials or additives. Poly aluminum chloride is widely used in the sewage treatment industry, the most common are the PAC and polyacrylamide. Especially due to polyaluminum chloride and polyacrylamide and other products in the flocculation sedimentation side speed has a prominent effect, commonly used in daily life sewage and chemical wastewater, industrial wastewater treatment. Polyaluminum chloride is the main material used for wastewater treatment in petroleum exploration. Polyacrylamide is a kind of multifunctional oilfield chemical treatment agent used as oil displacement agent, plugging regulator, drilling fluid regulator, fracturing agent in petroleum exploitation Liquid additives. The existence of soil crust soil surface with a density, small pores, low saturated hydraulic conductivity of nature, can hinder soil moisture infiltration, increase surface runoff and prevent seed germination. Polyacrylamide can improve soil moisture content, inhibit the formation of soil crust, increase water infiltration.