... common industrial raw materials, nonpoisonous and harmless, widely as sewage treatment reagent, biological fertilizer (nutrients) and feed additive, paint, ... bags of 50kgs net each. 2, in/sewage treatment purposes in sewage disposal of ferrous sulfate on with a wide ... removing sulfide, phosphate, sulfate, with examples of sulfur wastewater treatment textiles. 3, a reductant, ferrous sulfate is strong, ...