Micro-electrolysis treatment system and process for low-concentration COD (Chemical Oxygen Demand) wastewater

The invention relates to a low-concentration COD wastewater micro-electrolysis treatment system and process. The system comprises an MBR water producing tank, an acidification tank, a micro-electrolysis catalytic reaction tank, a catalytic oxidation tank, a liquid alkali stirring tank, a PAM stirring tank and a flocculation sedimentation tank which are sequentially connected through pipelines. The upper part of the flocculation sedimentation tank is connected with a purified water discharge pipe, the lower part of the flocculation sedimentation tank is connected with a sludge discharge pipe leading to a sludge tank, the sludge tank is connected to a filter press through a pipeline, and the filter press is connected with a liquid return pipe leading to the MBR water producing tank; and a micro-electrolysis filler and an aeration pipeline are arranged in the micro-electrolysis catalytic reaction tank. According to the micro-electrolysis treatment system for the low-concentration COD wastewater, by adding a micr