Abstract: The design capacity of certain non-drinking domestic water treatment equipment is 150 m3/h. The combined process of “pretreatment-ultrafiltration-nanofiltration (UF-NF)” is adopted and the effluent quality meets the requirements of Standards for Drinking Water Quality (GB 5749-2006). The operation results show that the year-round average effluent CODMn is less than 2 mg/L; the turbidity is 0.1 NTU; the chromaticity is less than 5 degrees; the TDS is 275 mg/L, which completely meet the water quality requirement of the standards. This paper introduces the process flow of the device and the design parameters of the main structures and the equipment. It summarizes the operation of the device and the operating costs. This can provide reference for the design of similar projects.

Key words: non-drinking domestic water, ultrafiltration (UF), nanofiltration (NF)