Water-based paint wastewater treatment system and reactor thereof

The invention discloses a water-based paint wastewater treatment system and a reactor thereof. The wastewater treatment system is divided into a pretreatment unit and an anaerobic treatment unit, a tank is arranged on the outer side of the pretreatment unit, a squeezing and filtering device is arranged on the inner side of the tank, and a wastewater collection pool is arranged below the squeezing and filtering device; and a metering lifting pump is arranged below the wastewater collection pool, a pretreatment reaction tank is arranged below the lifting pump, sludge conditioning equipment is arranged below the pretreatment reaction tank, and a dehydrator is arranged below the sludge conditioning equipment. By arranging the sludge conditioning equipment, sludge in wastewater subjected to anaerobic treatment can be subjected to secondary sludge-water separation, sewage subjected to anaerobic treatment is prevented from being directly discharged to water conservancy pollution, and the requirement for environment-