The Study On Treating Wastewater With Oil By Air-flotation

The current situation of wastewater treatment at present is reviewed synthetically. The system of oil-removed with air-flotation is researched at first. Atmospheric pressure, the amount of air dissolved, the rate of air and oil, waste water ization degree, floating time, PH value, coagulants, waste water oil contents, temperature and the organic solvent etc. are analyzed. The experimental result shows: Wastewater ization degree at 3% about, PH value between 6-8 and the suitable coagulant (PAC: 50-70mg/L) are controlled to improve removing oil efficiency. The solubility of animal oil is smaller than the solubilities of vegetable oil in the organic solvent.Air flotation with high efficiency, safety and reliability is the technology of practical economy. The problem of released-stop and dross-piled up should be solved at present. Zhang Ya-jie(environment engineering) Directed by prof.Feng Hui...