Integrated sewage purification system for purifying sewage into earth surface III-type water

The utility model discloses an integrated sewage purification system for purifying sewage into earth surface III-type water, which comprises a container, a photoelectric complementary power generation device and a sewage purification and resource utilization device are arranged in the container, and the photoelectric complementary power generation device comprises a plurality of solar panels, a combiner box, an inverter and a special bidirectional electricity meter for photovoltaic power generation; the sewage purification and resource utilization device is connected with a power grid through an inverter, the power grid is connected through a two-way ammeter, and the sewage purification and resource utilization device comprises a coagulating sedimentation device, an ionic catalytic electrolysis denitrification device, a reduction tank and a biological aerated filter. According to the utility model, the CODCr of the effluent is less than or equal to 20mg/L, the BOD5 is less than or equal to 4mg/L, the ammonia