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Tytuł:
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High-temperature biofilm system based on heterotrophic nitrification and aerobic denitrification treating high-strength ammonia wastewater: Nitrogen removal performances and temperature-regulated metabolic pathways.
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Autorzy:
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Lin Z; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
Zhou J; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China. Electronic address: .
He L; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
He X; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
Pan Z; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
Wang Y; College of Civil Engineering, Fuzhou University, Fuzhou, Fujian 350116, China.
He Q; Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
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Źródło:
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Bioresource technology [Bioresour Technol] 2022 Jan; Vol. 344 (Pt A), pp. 126184. Date of Electronic Publication: 2021 Oct 25.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Barking, Essex, England : New York, N.Y. : Elsevier Applied Science ; Elsevier Science Pub. Co., 1991-
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MeSH Terms:
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Nitrification*
Wastewater*
Aerobiosis ; Ammonia ; Biofilms ; Denitrification ; Heterotrophic Processes ; Metabolic Networks and Pathways ; Nitrogen ; Temperature
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Contributed Indexing:
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Keywords: Biological nitrogen removal; Heterotrophic nitrification and aerobic denitrification (HNAD); High temperature; High-strength ammonia; Metagenomic analysis
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Substance Nomenclature:
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0 (Waste Water)
7664-41-7 (Ammonia)
N762921K75 (Nitrogen)
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Entry Date(s):
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Date Created: 20211028 Date Completed: 20211207 Latest Revision: 20221207
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Update Code:
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20240105
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DOI:
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10.1016/j.biortech.2021.126184
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PMID:
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34710604
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Conventional autotrophic nitrification process is difficult to treat high-temperature wastewater with high-strength ammonia. In this study, a high-temperature (50 °C) biofilm system based on heterotrophic nitrification and aerobic denitrification (HNAD) was established. The results showed that the HNAD process was high temperature resistant, and the nitrogen removal performance, pathway and microbial mechanism varied remarkably at different temperatures. The high-temperature system showed excellent nitrogen and COD removal capacities at 50 °C. Ammonia oxidation was mainly undertaken by heterotrophic nitrification, while anoxic and aerobic pathways worked in concert for denitrification. High-throughput sequencing indicated that heterotrophic nitrifying bacteria (8.58%) and denitrifying bacteria (52.88%) were dominant at 50 °C. Metagenomic analysis further suggested that the carbon metabolism was up-regulated in response to the increasing temperature, so more energy was generated, thereby promoting the HNAD-related nitrogen removal pathways. The study revealed the microbial mechanism of HNAD at high temperature and provided new insights into high-temperature biological nitrogen removal.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
