Treatment technology of mixed wastewater containing 2B oil, 2B acid and 4B acid

The invention provides a treatment technology of mixed wastewater containing 2B oil, 2B acid and 4B acid, and belongs to the field of process design of production process wastewater. The treatment technology comprises the following steps: introducing high-concentration process mixed wastewater into an oil separation tank, removing floating oil in the wastewater, adjusting the pH value of oil-separated effluent, carrying out a micro-electrolysis reaction, adding an oxidant into the micro-electrolysis effluent, and carrying out a Fenton oxidation reaction; introducing the oxidized wastewater into a coagulative precipitation tank, carrying out sludge-water separation, pumping the obtained supernatant into a biochemical system, carrying out anaerobic hydrolysis and continuous aerobic treatmentprocesses, transporting excess sludge outwards for treatment, carrying out sludge-water separation on biochemical effluent, and carrying out advanced oxidation treatment on the obtained supernatant to make discharged water m