Zhang Jing, Zhang Shou-Jing, Liu Chun, Shi Jia-Ze, Chen Xiao-Xuan, Zhang Lei, Zhang Rui-Na
Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
Huan Jing Ke Xue. 2020 Apr 8;41(4):1752-1760. doi: 10.13227/j.hjkx.201907231.
The treatment performance of microbubble ozonation used for advanced treatment of actual pharmaceutical wastewater and tannery wastewater was investigated and compared to show the influence of complicated wastewater quality. The results showed that most organic pollutants in pharmaceutical wastewater and tannery wastewater could be degraded by microbubble ozonation effectively. and COD was removed simultaneously. In addition, the biodegradability was improved and the bio-toxicity was eliminated significantly. The ratios of COD amount removed and ozone amount consumed were 0.77 and 1.02, respectively, in such advanced treatment of pharmaceutical wastewater and tannery wastewater, indicating different ozone oxidation efficiencies between pharmaceutical wastewater and tannery wastewater. The main types of organic pollutants in pharmaceutical wastewater and tannery wastewater were determined by GC-MS and 3D-EEM, which showed the influence on treatment performance of microbubble ozonation. More refractory complex aromatic organic pollutants were found in pharmaceutical wastewater, which seemed more difficult to undergo degradation by microbubble ozone oxidation. As a result, the microbubble ozone oxidation of pharmaceutical wastewater was less efficient than that of tannery wastewater. The inorganic anions in both kinds of wastewater were unfavorable for ozone mass transfer, ozone decomposition, and·OH generation, which reduced the reaction efficiency of microbubble ozonation as well as biodegradability improvement. The lower concentrations of inorganic anions were better for microbubble ozonation.
研究并比较了微泡臭氧化用于实际制药废水和制革废水深度处理的处理性能，以显示复杂废水水质的影响。结果表明，制药废水和制革废水中的大多数有机污染物可通过微泡臭氧化有效降解，同时化学需氧量（COD）被去除。此外，生物降解性得到改善，生物毒性显著消除。在制药废水和制革废水的这种深度处理中，COD去除量与臭氧消耗量的比值分别为0.77和1.02，表明制药废水和制革废水的臭氧氧化效率不同。通过气相色谱-质谱联用仪（GC-MS）和三维荧光光谱（3D-EEM）确定了制药废水和制革废水中有机污染物的主要类型，这显示了对微泡臭氧化处理性能的影响。在制药废水中发现了更多难降解的复杂芳香族有机污染物，它们似乎更难通过微泡臭氧氧化进行降解。因此，制药废水的微泡臭氧氧化效率低于制革废水。两种废水中的无机阴离子不利于臭氧传质、臭氧分解和·OH生成，这降低了微泡臭氧化的反应效率以及生物降解性的改善。较低浓度的无机阴离子对微泡臭氧化更有利。
