Introducing PHBV and controlling the pyrite sizes achieved the pyrite-based mixotrophic denitrification under natural aerobic conditions: Low sulfate production and functional microbe interaction

The pyrite-based autotrophic denitrification usually focused on the anaerobic/anoxic environment with high sulfate production and low denitrification efficiency. In this study, the oxygen limitation was broken and high-rate mixotrophic denitrification was realized via introducing poly-3-hydroxybutyr...

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Bibliographic Details
Published in:Journal of cleaner production 2022-09, Vol.366, p.132986, Article 132986
Main Authors: Zhou, Qi, Jia, Lixia, Wu, Weilong, Wu, Weizhong
Format: Article
Language:English
Subjects:
Functional genes
Mixotrophic denitrification
Molecular ecological network
PHBV
Pyrite
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Summary:The pyrite-based autotrophic denitrification usually focused on the anaerobic/anoxic environment with high sulfate production and low denitrification efficiency. In this study, the oxygen limitation was broken and high-rate mixotrophic denitrification was realized via introducing poly-3-hydroxybutyrate-hydroxyvalerate (PHBV) and controlling the pyrite grain sizes compared with PHBV-heterotrophic and pyrite-autotrophic denitrification under natural aerobic conditions. Results showed that the optimal pyrite grain size was 30 meshes (0.45–0.55 mm) with the highest denitrification rate of 0.65 mg NO3−−N/(L•h) and sulfate production of
ISSN:0959-6526
1879-1786
DOI:10.1016/j.jclepro.2022.132986