In order to improve the effect of air reaeration in the anaerobic phase of wastewater treatment, we used a combination of the siphon theory, the seepage theory, the theory of draft tubes in hydropower stations, and the wastewater biological treatment technology to develop an anaerobic/potential energy increasing oxygen ecological purification technology based on traditional anaerobic/aerobic technology. Case studies in industrial wastewater including grease wastewater and coking wastewater show that the technology is effective in pollutant purification.