Abstract: In order to improve the resource utilization rate of an organic waste produced by produc⁃ tion activities，aiming at the problems of large output，scattered distribution and high content of SS， COD，BOD and ammonia nitrogen in high concentration biogas slurry after treatment and plant sewage， the organic wastewater treatment technology based on pretreatment + IC anaerobic reactor + ammonia nitro⁃ gen removal tank + two-stage A/O tank + biological contact oxidation combined process is studied.The re⁃ sults show that the effluent COD concentration of the reactor is 2 000 mg/L，the COD removal rate reaches 88.2%，and the methane content in the produced gas is stable at about 59.5% under stable operation.The overall operation effect of the wastewater treatment system is good. The combined process can realize the ef⁃ fective degradation of organic pollutants and the stable output of methane，which can provide an effective technical path for the resource treatment of organic waste and subsequent wastewater treatment.

Key words: organic waste, wastewater treatment, IC anaerobic reactor, anaerobic fermentation biogas production