Water Treatment and Detoxification of the By-products Resulted from Lubricating Phosphatation of Iron-Based Metal Parts

摘要

The paper presents data from the application of a new waste water treatment and of detoxification of industrial by-products resulted from decreasing, pickling andphosphating processes of metal parts based on iron. As in the microcrystalline phosphating are involved a series of potentially high toxic substances and waste water have complex chemical and physical charge, for them and the resulting sludge was developed a procedure involving four competitive processes: classical coagulation, flocculation with a polyelectrolyte with high capacity of ion exchange (for anions and cations), adjustment of the optimal pH (8.5...9.5), and destabilization of the microcoloidal system by involving adsorbers type fly ashes. These processes are applied simultaneously in single step stations - only mechanically.