... suitable for industrial sewage, such as metallurgy, pottery, coal dressing, papermaking, printing and dye, the leather, and petrochemical industry, etc ... Ferric Sulfate have great adaptability to acidity of source water, good sedimentation rate, thick and solid floccules, ... COD, BOD and heavy metal, low cost of water treating.The application and dosage of PFSNameDosageNameDosagedrinking water1:40000 ...