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| Ozone Catalytic Advanced Oxidation Technology for Secondary Effluent of Paper-making Mill |
| Received:November 25, 2021 |
| DOI：10.11981/j.issn.1000-6842.2022.01.79 |
| Key Words:ozone;catalytic oxidation;papermaking wastewater;CODCr |
| Fund Project:广州市科技计划项目（项目编号202002030157）；山东省重点研发计划项目（项目编号：2019JZZY010501）。 |
| Author Name | Affiliation | Postcode | | HE Wanli* | School of Light Industry and Engineering， State Key Laboratory of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | WU Shubin | School of Light Industry and Engineering， State Key Laboratory of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640
National Demonstration Center for Experimental Light Industry & Food Science Education， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | WAN Jinquan | School of Light Industry and Engineering， State Key Laboratory of Pulp and Paper Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640
School of Environment and Energy， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 |
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| Abstract: |
| 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. |
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