Patent ID: 10718061

Abstract:
An electrodeposition bath, water-washing baths, a first filtration membrane which feeds filtrate and concentrated-solution obtained by filtering electrodeposition-solution in the electrodeposition bath to the water-washing bath in a last stage and the electrodeposition bath, a feed system that feeds filtrate-water obtained by performing ultrafiltration or microfiltration on water after water-washing in the water-washing bath, a second filtration membrane which feeds filtrate and concentrated-solution obtained by filtering the filtrate-water fed by the feed system to the water-washing bath in the last stage and one of the electrodeposition bath and a water-washing bath other than the water-washing bath in the last stage, respectively, and a flow rate adjustment unit that adjusts a feed amount of each of the filtrate obtained by filtration by the first filtration membrane and the filtrate obtained by filtration by the second filtration membrane to the water-washing bath in the last stage are included.