期刊
WATER RESEARCH
卷 51, 期 -, 页码 25-36出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2013.12.023
关键词
Bioelectrochemical system; Nitrate; Denitrification; Biocathode; Pyrosequencing
资金
- National Research Foundation of Korea [2010-0003940, 2012R1A1A 2042031]
- Korea Ministry of Environment [GT-11-B-02-003-3]
- Korea Environmental Industry & Technology Institute (KEITI) [GT-11-B-02-003-3] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2010-0003940] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Electrochemical treatment of nitrate (NO3-), nitrite (NO2-) and mixtures of nitrate and nitrite was evaluated with microbial catalysts on a cathode in three different bioelectrochemical denitrification systems (BEDS). The removal rates and removal percentage of nitrogen (N) compounds varied during biotic and abiotic operations. The biotic cathode using NO3--N as an electron acceptor showed enhanced removal percentages (88%) compared to the operation with NO2--N (85%). The simultaneous reduction of NO3- and NO2- occurred in the operation with a mixture of N compounds. The bacterial diversity from the initial inoculum (return sludge) changed at the end of bioelectrochemical denitrification operation after 55 days. The microbial community composition was different depending on the type of electron acceptor. BEDS operation with NO3- and NO2- was enriched with Proteobacteria and Firmicutes respectively. BEDS with a mixture of N electron acceptors showed enrichment with Proteobacteria. There was no clear, distinct microbial community between the cathode biofilm and suspended biomass. (C) 2013 Elsevier Ltd. All rights reserved.
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