PÓS-TRATAMENTO FÍSICO QUÍMICO DE EFLUENTE DE UMA RETÍFICA DE MOTORES DO SUL DO BRASIL

In industrial processing of grinding motors are gen erated waste pollutants causing negative environmen tal impacts. However, the most relevant question in the grinding process is the generation of effluents. T he use of physical and chemical processes shows up as a modern alternative for the treatment of wastewater gener ated, but still little researched worldwide. This work pr esents a proposal to evaluate the efficiency of the physical- chemical process as post-treatment of effluents fro m grinding engines, based on processes of coagulati on and flocculation , through the characterization of the raw wastewater and treated effluent analysis . In a ddition, there was a selection of the best coagulant/floccul ants that presents best cost-effective for the trea tment. We tested three types of coagulant/flocculant and the following variables has been used as response: Chemical Oxygen Demand (COD), phosphorus (P), Turbidity, pH, temperature and oils and Grease (O&G). The Veta Organic coagulant showed better results in accordin g the qualitative, quantitative and economic aspect s. This reagent demonstrated best performance for the physi cal-chemical post-treatment of wastewater from grin ding motors.