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| Cu/Al2O3 Catalyzed Ozonation for Advanced Treatment of Papermaking Wastewater |
| Received:January 13, 2025 Revised:January 21, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.07.015 |
| Key Words:catalyzed ozonation heterogeneous catalyst papermaking wastewater advanced treatment impregnation-calcination method |
| Author Name | Affiliation | Postcode | | YIN Baohe* | Tianjin Wanfeng Environmental Protection Technology Co., Ltd., Tianjin, 300030 | 300030 | | CHANG Shubin* | Tianjin Wanfeng Environmental Protection Technology Co., Ltd., Tianjin, 300030 | 300030 | | ZHAN Shuyan | Tianjin Wanfeng Environmental Protection Technology Co., Ltd., Tianjin, 300030 | 300030 | | JIA Zhenrui | Tianjin Wanfeng Environmental Protection Technology Co., Ltd., Tianjin, 300030 | 300030 | | GAO Tao | Tianjin Wanfeng Environmental Protection Technology Co., Ltd., Tianjin, 300030 | 300030 | | DU Jingxuan | Tianjin Wanfeng Environmental Protection Technology Co., Ltd., Tianjin, 300030 | 300030 |
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| Abstract:In this study， firstly， the heterogeneous catalyst （Cu/Al2O3） was prepared by impregnation-calcination method with Al2O3 as the carrier， and we characterized it. Then， the effects of ozone inflow （4, 6, 8, and 10 mg/min）， catalyst dosage （30, 40, 50, and 60 g/L）， and circulating water flow rate （0, 40, 80, and 120 mL/min） on effluent chemical oxygen demand （COD） were tested in laboratory scale， using the wastewater of a paper mill in Tianjin as raw material. Finally， Cu/Al2O3 catalyzed ozonation was used as the advanced treatment process to carry out pilot tests. The results showed that Cu could be loaded on the surface of the carrier by impregnation-calcination method. In the laboratory tests， when the ozone inflow was 8 mg/min， the dosage of Cu/Al2O3 was 50 g/L， and the circulating water flow rate was 120 mL/min， the CODCr of wastewater decreased from 64.0 mg/L to 21.8 mg/L， and the removal rate of CODCr was 65.9%. In the pilot test， when the CODCr of influent water fluctuated in the range of 50.0~65.0 mg/L， the CODCr of effluent water was lower than 30 mg/L， and the CODCr removal rate was stable at about 63.1%. The COD of effluent water met the discharge standard of GB 3544—2008“Discharge standard of water pollutants for pulp and paper industry”， which indicated that the prepared catalyst had stable activity and no secondary pollution. |
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