... sulfate are widely used in drinking water, industrial water, all kinds of industrial waste water, city sewage and sludge dewatering of ... ions and other harmful substances, and also have no iron ion water phase transfer, non-toxic, harmless, safe and reliable4. Turbidity ... the oil, dehydration, degerming, deodorization and algae, remove the water COD, BOD and heavy metal ions, such as effectiveness ...