(1) The enterprise does not produce wastewater, and the domestic sewage is treated by the third-stage septic tank to reach the third-level standard of the second period of the “Water Pollutant Discharge Limit” (DB44/26-2001) of Guangdong Province, and then discharged into the municipal sewage pipe. The net, the catering wastewater is pretreated by the oil-water separator and discharged into the municipal pipe network. According to the "Advice Opinions on Design Conditions for Drainage Facilities in Huadu District" (Hua Shui Pao Xia Zi [2018] No. 174), the company is located in the system service of Xinhua Wastewater Treatment Plant.