The dataset represents the treatment of wastewater generated by common conversion activities. The average COD content in domestic wastewater in Hohhot, Inner Mongolia Autonomous Region is 0.3246 kg/m3, and BOD is 0.1308 kg/m3. The proportion of sewage treatment processes in this area are: A²/O 77.33%, CASS 14.78%, A/O 3.43%, secondary biochemistry 1.71%, UASB+CASS 1.41%, and others 1.34%.