The bacterial communities of bioelectrochemical systems associated with the sulfate removal under different pHs |
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| Institution: | 1. Department of Civil Engineering, University of Granada, Campus de Fuentenueva, s/n, 18071 Granada, Spain;2. Institute of Water Research, University of Granada, C/Ramón y Cajal, 4, 18071 Granada, Spain;1. CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, P R China;2. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100000, P R China;3. Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, State Key Laboratory Breeding Base of Marine Genetic Resources, Fujian Key Laboratory of Marine Genetic Resources, Xiamen 361005, P R China;4. University of Chinese Academy of Sciences, Beijing 100049, P R China;1. Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA;2. Department of Chemical Engineering, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar;1. School of Biological Sciences, Bangor University, Bangor LL57 2UW, UK;2. Universidad Arturo Prat, Iquique, Chile;3. Instituto Tecnológico Vale, Belém, Brazil |
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| Abstract: | Sulfate contamination in ecosystems has been a serious problem. Among various technologies, bioelectrochemical systems (BESs) show the advantage of no-pollution and low-cost for removing sulfate. In order to further expound the biological process of sulfate removal in BESs, 454 pyrosequencing was applied to analyze the bacterial communities under different pH conditions. The bacterial community profiles were analyzed from three aspects: (a) the α-diversity and β-diversity of bacterial communities, (b) the distribution of bacterial phylotypes, and (c) the characterizations of dominant operational taxonomic units (OTUs). We demonstrated that the indexes of phylotype richness and phylogenetic diversity were positively correlated across the pH gradient in the BESs. Among the dominant OTUs, the OTUs which were highly similar to Desulfatirhabdium butyrativorans, Desulfovibrio marrakechensis and Desulfomicrobium sp. might participate in removing sulfate. Standing on genus level, Desulfomicrobium and Sulfuricurvum play conducing and adverse roles for sulfate removal in alkaline condition, respectively. Desulfovibrio contributed to removing sulfate in the neutral and acidic conditions, while Thiomonas mainly weakened the performance of sulfate removal in neutral pH condition. These results further clarified how pH condition directly affected the bacterial communities, which consequently affected the performance of sulfate pollutant treatment using BESs. |
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| Keywords: | Sulfate removal Bioelectrochemical systems Pyrosequencing Microbial community |
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