臭氧微纳米气泡去除黑臭水体污染物的性能研究
Study on performance of ozone micro-nano bubbles in removing pollutants from black odorous water
黑臭水体因其具有刺激性气味及黑色外观成为城市和农村环境治理的主要对象。利用臭氧微纳米气泡发生装置对黑臭水体治理进行研究。通过表征分析发现黑臭水体中硫酸根离子、COD和NH3-N浓度以及硬度较高且革兰氏阴性菌为优势菌群,水中溶解性有机污染物主要由微生物或藻类代谢产物所贡献。在此基础上,采用BBD响应面方法(RSM)进行优化拟合,结果显示,臭氧微纳米气泡技术治理黑臭污水的最优工艺参数为臭氧浓度78 mg/L、pH值9.8、反应时间5.2 h。同时,研究表明有机污染物的去除率与pH值成正比;共存离子的影响强弱顺序为Cl-> > > ;随着曝气时间的增加,有机物的去除效率呈现先增加后平稳的趋势。最优工艺条件下臭氧微纳米气泡技术对黑臭水体中有机污染物的去除效率可达90.02%,显示其在去除黑臭水体中有机污染物具有良好效果和应用前景。
Black odorous water has become the main environmental control object in urban and rural areas because of its pungent odor and black appearance.In this study,ozone micro-nano bubbles generator is utilized to study the treatment of black odorous water body.It is found through characterization analysis that in black odorous water body,the concentrations of sulfate ion,COD and NH3-N as well as the hardness are higher,Gram-negative bacteria is the dominant bacteria,and the dissolved organic pollutants are mainly contributed by metabolites of microorganisms or algae.On this basis,Box-Behnken Design (BBD) response surface method (RSM) is employed to perform optimization and fitting.The results indicate that the optimal process parameters for ozone micro-nano bubbles technology are as follows:ozone concentration is 78%,pH is 9.8 and reaction time is 5.2 h.Moreover,the study shows that the removal rate of organic pollutants is proportional to pH value,and the influences of coexisting ions are in the order of Cl-> > > .With the extension of aeration time,the removal rate of organic matters increases firstly and remains stably then.Under the optimal process conditions,the removal efficiency of organic pollutants in black odorous water by ozone micro-nano bubbles technology can reach 90.02%,representing a good effect and application prospect in removing organic pollutants in black odorous water body.
ozone micro-nano bubbles / humic acid / black odorous water / organic pollutants
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胡思雨, 李松, 宋广清. 晋城市农村黑臭水体成因及污染因子相关性研究[J]. 给水排水, 2024, 50(2):57-64. |
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安徽省“同心科创工程”项目(202206e08020007)
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