Enhanced anammox consortium activity for nitrogen removal: Impacts of static magnetic field
Enhanced anammox consortium activity for nitrogen removal: Impacts of static magnetic field
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DOI：
10.1016/j.jbiotec.2008.08.002
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发表时间：
2008-11-25
影响因子：
4.1
通讯作者：
Gong, Zheng
中科院分区：
文献类型：
--
作者：
Liu, Sitong;Yang, Fenglin;Gong, Zheng
厌氧氨氧化工艺是一种很有前途的含氮废水处理技术。在短期间歇试验中，我们观察到厌氧氨氧化菌群的厌氧氨氧化活性随着磁场在16.8-95.0 mT范围内的变化而增加。在75.0 mT的值下获得最大50%的增加。为了研究磁场对厌氧氨氧化菌群的长期影响，在实验室规模的磁场强度为60.0mT的厌氧氨氧化反应器中进行了运行试验。结果表明，磁悬浮系统的最大脱氮率可提高30%，培养时间可缩短约1/4。微生物组成分析表明，磁暴露条件下，反应器中的细菌多样性下降。然而，一些属于浮游菌目的菌株高度富集。研究结果表明，磁场对厌氧氨氧化工艺的快速启动是有效的，是一种简便的提高厌氧氨氧化活性的方法。(C)2008年由Elsevier B. V.出版。
Anaerobic ammonium oxidation (anammox) process has been becoming a promising technology for the removal of nitrogenous contaminants from wastewater. In short-term batch tests, we observed the anaerobic ammonium oxidizing activity of anammox consortium increased as the magnetic field varied in the range of 16.8-95.0 mT. A maximum 50% increase was obtained at the value of 75.0 mT. In order to study long-term effect of magnetic field on anammox consortium, an anammox reactor with magnetic field of 60.0 mT was operated in laboratory-scale. The results demonstrated that a significant 30% increase in maximum nitrogen removal rate and an approximate 1/4 saving in cultivation time were achieved by using the magnetic system. Microbiological composition analysis showed that bacterial diversity in the reactor decreased under magnetic-exposed condition. Nevertheless, some strains belonging to Planctomycetales were highly enriched. These findings indicated that the magnetic field was useful and reliable for fast start-up of anammox process since it was proved as a simple and convenient approach to enhance anaerobic ammonium oxidizing activity. (C) 2008 Published by Elsevier B.V.