The dataset represents the treatment of wastewater generated by conventional conversion activities. The average content of COD in domestic wastewater in Xianning City, Hubei Province is: 0.1545 kg/m3, and BOD is 0.0455 kg/m3. The proportions of wastewater treatment processes in this area are: Oxidation Ditch 49.52%, Orbal Oxidation Ditch 20.13%, CASS 14.78%, BAF (biological aerated filter) 8.08%, secondary biochemical treatment 5.09%, and others 2.41%.