The dataset represents the treatment of wastewater generated by ordinary conversion activities. The average COD content in domestic wastewater in Dongguan City, Guangdong Province is: 0.1617 kg/m3, and BOD is 0.0629 kg/m3. The distribution of wastewater treatment processes in this area are as follows: A2/O accounts for 50.94%, CASS for 33.16%, oxidation ditch for 9.77%, Carrousel oxidation ditch for 3.12%, BAF (biological aerated filter) for 1.88%, and other processes account for 1.13%.