Study on Environmental Materials with Application of Ozone-Based Technologies in Removal of Characteristic Pollutants in Pulp and Paper Effluents

Abstract

Due to the presence of recalcitrant organic compounds, the pulp and paper effluents after treatment by conventional biological processes still contain high concentration of chemical oxygen demand (COD) and colored substances and do not satisfy the national emission standard. The objectives of this work are to present the research process on environmental materials with application of ozone-based technologies in removal of characteristic pollutants in pulp and paper effluents and suggest the feasible development trend. In this work, basic mechanisms of degradation of organic pollutants by ozone-based technologies in the presence of environmental materials as catalyst are described. The removal efficiencies of characteristic pollutants commonly found in pulp and paper effluents, such as absorbable organic halogens (AOX), resin and fatty acids, phenolic compounds, lipophilic wood extractives and ethylenediaminetetraacetic acid (EDTA), are presented.