Wastewater treatment system

The invention relates to the technical field of wastewater treatment, and discloses a wastewater treatment system which comprises a wastewater conveying module, a buffer tank, a heating module, a flow rate adjusting module and a waste liquid treatment module. The heavy oil attaching multi-disc coaxial body is composed of a middle shaft and a plurality of disc bodies distributed on the middle shaft at equal intervals, the scraping type solidified heavy oil collecting channel is arranged behind the heavy oil attaching multi-disc coaxial body, and the airflow washing residue collecting channel is arranged under the scraping type solidified heavy oil collecting channel; the heavy oil in the sewage is efficiently solidified on the disc body surface of the heavy oil attached multi-disc coaxial body by utilizing the characteristic that the solidifying points of the heavy oil and the light oil are greatly different and adopting a special disc type rotating structure and utilizing the temperature difference effect, an