Zibo Dazhong Edible Chemical Co., Ltd. commits to providing top-grade chemicals for the treatment industry of drinkable water and sewage. At present, Dazhong is the biggest manufacturer in Asia for aluminium sulphate and alum products, and our aluminium sulphate series and alum series are widely used in the large-scale treatment organizations all over the world! Covering an area of 300,000sqm, we now have over 500 employees and nine departments, including office, No.1 sales dept., No.2 sales ...