High Salt Strongly Acidic Refinery Wastewater Treatment Feasible Process Study

Refinery wastewater is a typical high concentrated organic wastewater, it usually has some outstanding features such as high CODcr, high oil, strongly acidic or strong basicity and complex water, and the treatment process is more complex. The cost of energy and pharmaceutical is high, and it’s economy is poor. Therefore, the handing method that is simple, reliable, low-cost has been one of the hot research at home and abroad.Our study took that Fushun a certain refinery process sodium sulfate supersaturated, high CODcr, strong acid mixed oil refining wastewater as research objects. It used Fe-C micro-electrolysis process and Fenton oxidation as the core technology of degradation CODcr. The experiment explores the effect that high concentration of salts in wastewater made for Fe-c electrolysis treatment and the necessity of Fenton oxidation hydrolysis acidification before, proposed "Fe-c microelectrolysis →Thermostat evaporation →Hydrolytic acidification → Fenton oxidation →Reverse osmosis" process, and determined the process operating parameters to the reasonableness of each step, effluent water to achieve "Urban Sewage Treatment Plant Pollutant Discharge Standard" (GB18918-2002) level of A standard, and the wastewater treatment costs 56.8 yuan/m3.Experiment shows that using the process to deal with high salt high CODcr strongly acidic refinery wastewater takes advantage of the high salt water, strong acidic water quality characteristics, significantly reduces energy consumption and pharmaceutical costs, and it has a stable operation and a certain resistance to impact load, and it has better removal efficiency on major pollutants, and the economic efficiency greatly improved. So it has a certain practical significance.