... sewage treatment purposes in sewage disposal of ferrous sulfate on with a wide range of USES, mainly as flocculating agent, ... of sulfide, phosphate deposits, thus removing sulfide, phosphate, sulfate, with examples of sulfur wastewater treatment textiles. 3, a reductant, ferrous ... ml of water, add 1 gram, specific drug with pollutant concentration, temperature and the ph of the sewage and change, please ...