... non-toxic, harmless, safe and reliable4. Turbidity removal, decoloring, to take off the oil, dehydration, degerming, deodorization and algae, remove the ... effectiveness significantly;5. Polymer iron sulfate water PH value to adapt to a wide range for 4-11, optimum PH ... 10-30%) into soluble alum pool, injection water mixing make full hydrolysis, quiet place to a reddish brown liquid, again against ...