Application of polyaluminium salt as flocculating agent
ZHANG Ru yi, YANG Hong, GAO Cai ling (Jiaozuo Institute of Technology, Jiaozuo 454000,China)
At present, polyaluminium chloride (PAC) has been widely used as water treatment agent for water for living, industrial water service and industrial effluent. To improve its flocculation properties, much work has been done, mainly introducing some other ions into PAC to form polyblend so as to improve its abilities of neutralizing electric charge or complexing, such as polyblend of iron and aluminium salt; polyblend of silica and aluminium salt; polyblend of silica, iron and aluminium salt, polyblend of phosphate and aluminium salt; polyblend of iron and aluminium salt with silica and calcium etc. The comprehensive application of polyaluminium salt, polyblend of aluminium salt and other salt, combining use of polyaluminium salt and organic polymeric flocculant in dealing with the water for living, industrial water service and industrial effluent has been discussed in this paper, The development trend of polyaluminium salt in water treatment is also discussed.
【CateGory Index】： X703.1