▎ 摘　　要

NOVELTY - Pre-treatment of phenolic resin production wastewater involves polycondensing the phenolic resin wastewater, adding alkali to remove aldehydes, adjusting the pH of the wastewater, passing the neutralized water and produced wastewater into the inclined tube sedimentation tank, adding polyaluminum chloride and polyacrylamide to the sedimentation tank for coagulation and sedimentation, passing wastewater to the buffer tank and graphene oxidation device through the feed pump, subjecting to electro-oxidization reaction, passing the produced wastewater to circulation tank, discharging the generated wastewater in circulation tank into biochemical system through the discharge pump for biochemical treatment, continuously passing the generated wastewater to internal circulation treatment system, and continuously discharging the treated wastewater from internal circulation system under water quality condition by adjusting the current density, flow rate of water and residence time. USE - Pre-treatment of phenolic resin production wastewater. ADVANTAGE - The method effectively treats phenolic resin production wastewater with strong oxidation degradation rate due to high current density supply of graphene electrode plate having strong oxidation and tolerance capacity, and solves the phenolic resin wastewater resistance problem of graphene plates to realize high current density operation. DETAILED DESCRIPTION - Pre-treatment of phenolic resin production wastewater involves polycondensing the phenolic resin wastewater, adding alkali to remove aldehydes, adjusting the pH of the wastewater to ensure that the phenol content is less than 200 mg/L, passing the neutralized water and produced wastewater into the inclined tube sedimentation tank, adding polyaluminum chloride (PAC) and polyacrylamide (PAM) to the sedimentation tank for coagulation and sedimentation to reduce the suspended solids in the phenol-containing wastewater, so that to reduce the impact of the suspended solids on degradation efficiency of the electrode plate, passing the produced wastewater after coagulation and precipitation to the buffer tank and graphene oxidation device through the feed pump, subjecting the wastewater from the lower portion of the graphene oxidation device to electro-oxidization reaction through the electrode plate, passing the produced wastewater after the electro-oxidation to the upper portion of the graphene oxidation device, flowing the produced wastewater overflowing in upper portion of the graphene oxidation device into the circulation tank, discharging the generated wastewater in circulation tank into biochemical system through the discharge pump for biochemical treatment, so that wastewater in the circulation tank will flow back to graphene oxidation device through circulation pump and circulation tank and the circulation pump drive the wastewater to continuously circulate treatment, forming internal circulation treatment system with the graphene oxidation device to improve the degradation ability of the wastewater, continuously passing the generated wastewater to internal circulation treatment system, continuously discharging the treated wastewater from internal circulation system under specific water quality condition by adjusting the current density, flow rate of water and residence time, and ensuring the phenol content of the effluent.