Effect of pH on inactivation of Microcystis aeruginosa by ozonation air in sequencing batch reactor
Effect of pH on inactivation of Microcystis aeruginosa by ozonation air in sequencing batch reactor
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DOI：
10.1002/jctb.2542
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发表时间：
2011-03
影响因子：
3.4
通讯作者：
Hongjing Li;Chenchao Yao;Xiao Dong;W. Dong;Zhengqiu Fan
中科院分区：
文献类型：
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作者：
Hongjing Li;Chenchao Yao;Xiao Dong;W. Dong;Zhengqiu Fan
本研究采用臭氧和空气的混合物（简称臭氧空气）在序批式反应器（SBR）中对铜绿微囊藻进行灭活。铜绿微囊藻的扫描电子显微镜显示，臭氧氧化后细胞壁受损，细胞内内容物渗漏。由于细胞的破坏，细胞释放的叶绿素a被臭氧氧化降解，这表明叶绿素a浓度在前5分钟内大幅增加，然后不断下降。 SBR 中的 pH 值随着时间的增加而下降，在循环结束时达到 3.0 左右。结果表明，在pH 3.0、7.0、9.0和11.0条件下90 min后，叶绿素a的去除效率分别为68.4%、74.5%、86.7%和77.9%，叶绿素a的降解符合表观一级动力学。结果表明，臭氧处理成功地灭活了铜绿微囊藻，验证了这种替代工艺净化富营养化水体的潜力。版权所有© 2010 中国化工学会
In this study, a mixture of ozone and air (ozonation air for short) was adopted for the inactivation of Microcystis aeruginosa in a sequencing batch reactor (SBR). Scanning electron microscopy of Microcystis aeruginosa revealed damage to the cell wall and leakage of intracellular contents after ozone oxidation. Owing to the destruction of cells, the chlorophyll a released from the cells was degraded by ozone oxidation, which showed that chlorophyll a concentrations increased vastly during the first 5 min, then, decreased continuously. pH in the SBR declined with increasing time, reaching around 3.0 at the end of the cycle. It was observed that the removal efficiencies of chlorophyll a were, respectively, 68.4%, 74.5%, 86.7% and 77.9% after 90 min at pH 3.0, 7.0, 9.0 and 11.0 conditions, and the degradation of chlorophyll a accorded with the apparent first-order kinetics. The results suggested that inactivation of Microcystis aeruginosa was successfully performed by ozone treatment, verifying the potential of this alternative process for the decontamination of eutrophic water. Copyright © 2010 Society of Chemical Industry