CWAO Technology for the Treatment of Refractory-Biodegradable Organic Wastewater

Abstract

With the development of society and industrial progress, the types and quantity of organic wastewater produced by refractory-biodegradation have increased. As an effective way to treat refractory-organic wastewater, CWAO technology has attracted more and more attention in recent years. The principle of CWAO technology belongs to free radical reaction, which mainly includes two processes: the exchange of oxygen in wastewater and the reaction between liquid oxygen and contaminants supported on the catalyst. Free radical reactions include three specific processes: chain initiation, chain delivery and chain termination. Homogeneous CWAO reaction can efficiently treat high concentration of organic wastewater, but the catalyst cannot be recovered to form secondary pollution. Heterogeneity is the research hotspot of CWAO technology and a suitable means for the treatment of highly concentrated organic wastewater, which has been used more and more in printing and dyeing, pharmaceutical, chemical, manufacturing and other industries.