In this study, we installed a device for the reuse of sewage treatment water at the end of the total public sewage treatment facilitylocated in B city of Gyeonggi-do. The ozone oxidation process was composed of the following: a device for dissolving ozone; a non-contact plasma water treatment device; a reaction tank; and a discharge ozone treatment device. We constructed the ozone oxidation process in connection with the total phosphorus treatment facility to obtain stable sewage recycled water quality for secondary sewage treatment water, and studied the substrate removal characteristics according to ozone dissolution characteristics and ozone dosage. The CODremoval rate increased from 16.2% to 38.7% as the ozone dosage rate increased from 30 g/hr to 68 g/hr, averaging 0.41 gCOD/gO₃. The BOD removal rate increased from 22.2% to 59.5%, and the amount of BOD removal (g) per g ozone ranged from 0.34 g/hr to 0.57 g/hr, averaging 0.43 g BOD/gO₃ under a flow rate of about 300 ㎥/day. The color removal rate was increased in proportion to the ozone dosage amount with the exception of the violet color, which tended to remain somewhat visible.