... inorganic flocculant, and without injecting or injecting little alkaline agents.D PH5.0-9.0 range can be condensed ... drainage cleaning: water, groundwater, river water, reservoir.B, industrial water purification.C, urban wastewater treatment.D, useful substances ... washing waste water recovery of starch, starch manufacture.E, industrial wastewater treatment: wastewater from printing and dyeing, leather, ...