OZONE TREATMENT SYSTEM FOR DYEING WASTEWATER AND DYE CONTAINING WASTEWATER TREATMENT PROCESS USING THE SAME

摘要

PURPOSE: An ozone treatment system for dyeing wastewater and a continuous dye containing wastewater treatment process using the same are provided to reduce color as well as COD. CONSTITUTION: The ozone treatment system comprises three vertical reactors consisting of three packed towers(1,2,3); three recycling tanks(1-a,2-a,3-a); three circulating pumps(5,6,7). Dye-containing wastewater is pumped into the recycling tank(1-a) of the first reactor and then circulated through the packed tower(1) of the first reactor by the circulating pump(5) undergoing counter-current contact with ozone gas stream upward through the bottom of the packed column, a portion of the wastewater being overflown to the next recycling tank(2-a) of the second reactor performing the same sequence as the first reactor. Ozone flows into the bottom of the packed tower(3) of the last reactor and come out form the top of the tower(3) then to the bottom of the second and to the first one.