Application of Electrolysis and Ozone in the Treatment of Dyestuff Wastewater

The paper introduced the treatment of dyestuff wastewater by combination of electrolysis and the second stage physicochemical of ozone.Electrolysis destroyed the chain structure of polymeric substances in the high concentration dyestuff wastewater,then ozone directly oxi- date organic pollutant under the catalysis of Fe~(2+),at last,mixed wastewater containing it and low concentration water was treated by biological contact oxidation process.The results showed that the average remove rates of COD_(Cr),SS and color was 91.7%,89.8% and 89.9%,re- spectively,the main indexes of water quality reaching the first class of Integrated Waste Water Discharge Standard:GB8978-1996.The pro- cess had the advantages of higher removal efficiency of pollutants,stabile operation,less land occupation,lower operating expense,and less generation of sludge,and could be widly used in the treatment of waste water.