The manufacturing processes can produce large amounts of wastewater, waste water if these directly into rivers, it will directly cause water pollution. It is necessary for papermaking wastewater water treatment, and wastewater treatment in the paper the most commonly used agent is aluminum sulfate. Aluminum sulfate as the principal agent Wastewater Treatment of Papermaking Wastewater conduct coagulation, electric double layer compression and phosphorus and phosphate precipitation.

 

 Paper features no iron aluminum sulfate, aluminum sulfate is a white crystalline substance, a specific gravity of 1.69 (with AL2 (SO4) · 18H2O dollars), long-term storage in the air easily absorb moisture caking. Dehydration temperature was 86.5 degrees Celsius, it can be dissolved in water, acid and alkali, insoluble in alcohol, acidic aqueous solution.

 

Paper purifier with aluminum sulfate in addition to the role played in the wastewater treatment can also play a role in sizing on the paper sizing. In Wastewater use was relatively good agent, in addition to aluminum sulfate, sodium metabisulfite still.