This paper focuses on aspects of debugging and running the actual project, discusses the different types of coagulant for the coagulation effect of such wastewater, to elect the best coagulant dosage, and coagulation between the agent and coagulant dosage ratio. Works in the dosage of aluminum sulfate 40 mg/L and PAM dosage of 3mg/L, the pH of influent wastewater is 7 to 8, the numerical of COD, SS, OIL is 279mg/L, 20mg/L, 26mg / L, coagulation and flotation, the effluent COD, SS, OIL removal, respectively, 52%, 50%, 64%, the effluent concentra...