The wastewater from citric acid industry belongs to high concentration of organic pollutants,and the secondary effluent treated with biochemical method still contains certain level of COD and chroma.To eliminate their threats to the environment,this work tried to treat the secondary effluent of citric acid wastewater with ozone oxidation.The optimal technical parameters were determined through orthogonal experiment.The result showed that the COD removal rate of citric acid wastewater was 88.5%,and the decolourization ratio attained 96.0%under the optimized conditions of contact time of 30 min,pH of 10,and temperature of 27℃.
维普
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