Treatment system and treatment process for realizing zero discharge of wastewater by using whole membrane method

The invention provides a treatment system and a treatment process for realizing zero discharge of wastewater by using a whole membrane method. According to the invention, by using a pretreatment process of at least a clarification tank and a filter and a whole membrane method treatment process of ultrafiltration, two-stage reverse osmosis and electrodeionization, all wastewater such as concentrated water, backwashing drainage and the like generated in the system are recycled in the system, and the wastewater which cannot be directly recycled enters a heat supply network supplementary water system after being treated to reach the water quality standard of softened water, so that all water in the system can be used, finally, no waste liquid is discharged out of a factory, and wastes in the water are outwards transported and recycled in a solid form; and the pretreatment process of the treatment process is high in practicability, the applicable water quality range is wide, the safety is high, and the current env