| 催化臭氧氧化与NaClO处理钛白粉废水中试对比 |
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| 引用本文： | 方广君,王叶鑫,李理.催化臭氧氧化与NaClO处理钛白粉废水中试对比[J].环境工程,2021,39(11):154-158. |
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| 作者姓名： | 方广君 王叶鑫 李理 |
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| 作者单位： | 1. 中化环境控股有限公司, 北京 100071; |
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| 摘 要： | 以山东某钛白粉厂二级压滤出水为研究对象，通过自主设计的中试设备考察了催化臭氧氧化工艺与NaClO工艺对钛白粉废水处理情况，确定催化臭氧氧化的最佳工艺实验条件为:在室温条件下，催化臭氧氧化反应时间为60 min，臭氧投加浓度为125 mg/L。对原有NaClO工艺进行优化，优化后的最佳工艺为:NaClO投加量为1.2%，反应时间为30 min。当平均进水ρ（COD）与ρ（NH3-N）分别为109.7，12.8 mg/L，则催化臭氧工艺平均出水ρ（COD）与ρ（NH3-N）分别为43.5，3.8 mg/L，平均去除率分别为60%和70.4%，NaClO工艺平均出水ρ（COD）与ρ（NH3-N）分别为49.8，4.7 mg/L，平均去除率分别为54.5%和63.1%。在30 d内，催化臭氧氧化出水达标率为100%，NaClO出水达标率为26.7%，催化臭氧氧化处理费用为1.12元/t，NaClO处理费用为12元/t，催化臭氧氧化工艺相较于NaClO氧化工艺更适用于处理钛白粉废水。
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| 关 键 词： | 催化臭氧氧化 次氯酸钠 氨氮 中试 |
| 收稿时间： | 2021-07-27 |
COMPARATIVE PILOT TEST OF CATALYTIC OZONE OXIDATION AND NaClO IN TREATING TITANIUM DIOXIDE WASTEWATER |
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| Affiliation: | 1. Sinochem Environment Holdnings Co., Ltd, Beijing 100071, China;2. Sinochem Environment Science and Technology Engineering Co., Ltd, Shenyang 110000, China |
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| Abstract: | Taking the secondary pressure filtration water from a titanium dioxide plant in Shandong as the research object, the catalytic ozonation process and the treatment of titanium dioxide wastewater were investigated through a self-designed pilot plant, and the best experimental conditions for catalytic ozonation process were determined as follows:at room temperature, the catalytic ozone oxidation reaction time was 60 min, and the ozone concentration was 125 mg/L. The original NaClO process was also optimized, and the best process after optimization was as follows:NaClO dosage was 1.2%, and the reaction time was 30 minutes. When the average influent COD and ammonia nitrogen were 109.7 mg/L and 12.8 mg/L, the average effluent COD and ammonia nitrogen of the catalytic ozone process were 43.5 mg/L and 3.8 mg/L, respectively, and the average removal rates were 60% and 70.4%, respectively; and the average effluent COD and ammonia nitrogen in the NaClO process were 49.8 mg/L and 4.7 mg/L, respectively, and the average removal rates were 54.5% and 63.1%, respectively. Within 30 days, the standard-meeting rate of the catalytic ozonation process effluent was 100%, and that of the NaClO process effluent was 26.7%; the running cost of catalytic ozonation ton water treatment was RMB 1.12/t, and that of the NaClO treatment was RMB 12/t. The catalytic ozonation process was more suitable for treating titanium dioxide wastewater, compared with The NaClO oxidation process. |
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