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Anaerobic ammonium oxidation (Anammox) 1

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functional diversity/composition/structure 1

functional gene arrays (FGAs) 1

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Effects of Fe(II) on anammox community activity and physiologic response

Jing Ding, Wanyi Seow, Jizhong Zhou, Raymond Jianxiong Zeng, Jun Gu, Yan Zhou

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 1, doi: 10.1007/s11783-020-1299-9

Abstract: Abstract • 0.12 mmol/L Fe(II) enhanced the total anammox activity and bacterial abundance best. • 0.09 mmol/L Fe(II) led to the best performance on relative anammox activity. • 0.75 mmol/L Fe(II) had an immediate but recoverable inhibition on anammox activity. • More genes but not relative level were expressed at higher Fe(II) concentration. Though there are many literatures studying the effects of iron on anammox process, these studies only focus on the reactor performance and/or the microbial community changes, the detailed effects and mechanisms of Fe(II) on anammox bacterial activity and physiology have not been explored. In this study, four Fe(II) concentrations (0.03, 0.09, 0.12 and 0.75 mmol/L) were employed into the enriched anammox culture. The enhancement and inhibition effects of Fe(II) on anammox process and bacterial physiology were investigated. It was discovered that the anammox process and bacterial growth were enhanced by 0.09 and 0.12 mmol/L Fe(II), in which the 0.12 mmol/L Fe(II) had advantage in stimulating the total anammox activity and bacterial abundance, while 0.09 mmol/L Fe(II) enhanced the relative anammox activity better. The anammox activity could be inhibited by 0.75 mmol/L Fe(II) immediately, while the inhibition was recoverable. Both 0.09 and 0.12 mmol/L Fe(II) induced more genes being expressed, while didn’t show a stimulation on the relative expression level of functional genes. And anammox bacteria showed a stress response to detoxify the Fe inhibition once inhibited by 0.75 mmol/L Fe(II). This study provides more information about physiologic response of anammox bacteria to external influence (enhancement and inhibition), and may also instruct the future application of anammox process in treating various sources of wastewater (containing external disturbances such as heavy metals) and/or different treatment strategies (e.g. from side-stream to main-stream).

Keywords： Anaerobic ammonium oxidation (Anammox)     Candidatus Kuenenia stuttgartiensis     Ferrous iron     GeoChip    

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Development and applications of functional gene microarrays in the analysis of the functional diversity, composition, and structure of microbial communities

Zhili HE, Joy D. VAN NOSTRAND, Ye DENG, Jizhong ZHOU

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 1,   Pages 1-20 doi: 10.1007/s11783-011-0301-y

Abstract: design and verification, array construction, data analysis, and automatic update are used to develop the GeoChipGeoChip has been systematically evaluated and demonstrated to be a powerful tool for rapid, specific,Several generations of GeoChip have been developed and applied to investigate the functional diversityGeoChip is able to address fundamental questions related to global change, bioenergy, bioremediation,

Keywords： functional gene arrays (FGAs)     GeoChip     microbial communities     functional diversity/composition/structure    

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Title Author Date Type Operation

Effects of Fe(II) on anammox community activity and physiologic response

Jing Ding, Wanyi Seow, Jizhong Zhou, Raymond Jianxiong Zeng, Jun Gu, Yan Zhou

Journal Article

Development and applications of functional gene microarrays in the analysis of the functional diversity, composition, and structure of microbial communities

Zhili HE, Joy D. VAN NOSTRAND, Ye DENG, Jizhong ZHOU

Journal Article