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摘要
The secondary effluent from paper-making mill was sufficiently treated by ozone oxidation method. The effects of ozone intake, reaction time, reaction temperature, and pH value and circulation speed of wastewater on colority and CODCr removal rate of wastewater were investigated and the optimum process conditions were obtained. Based on which, a series of catalysts with different metal salts as precursors and N-doped activated carbon as carriers were used in the ozone catalytic oxidation. The results showed that under the optimal process conditions (ozone intake 3 g/h, reaction time 40 min, reaction temperature 40°C, initial pH value, and cycle speed 500 mL/min), the colority of wastewater was reduced to <5 C.U., CODCr removal rate was 86.9%. Of all the above-mentioned catalysts, CODCr removal rate of Ni@AC reached 91.7% due to its synergistic effect with ozone oxidation during wastewater treatment. ? 2022, China National Pulp and Paper Research Institute Co. Ltd.(CNPPRI). All right reserved.
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