RRC ID 48443
著者 Xiao Z, Awata T, Zhang D, Zhang C, Li Z, Katayama A.
タイトル Enhanced denitrification of Pseudomonas stutzeri by a bioelectrochemical system assisted with solid-phase humin.
ジャーナル J Biosci Bioeng
Abstract The denitrification reactions performed by Pseudomonas stutzeri JCM20778 were enhanced electrochemically with the use of solid-phase humin, although P. stutzeri itself was incapable of receiving electrons directly from the graphite electrode. Electrochemically reduced humin enhanced the microbial, but not abiotic, denitrification reactions. Electric current and cyclic voltammetry analyses suggested that the solid-phase humin functioned as an electron donor for the denitrification reactions of P. stutzeri. Nitrogen balance study and the estimation of the first-order rate constants of the consecutive denitrification reactions suggested that the solid-phase humin enhanced all reducing reactions from nitrate to nitrogen gas. Considering the wide distribution of humin in the environment, the findings that solid-phase humin can assist in electron transfer, from the electrode to a denitrifying bacterium that has little ability to directly utilize external electrons, has important implications for the widespread application of bioelectrochemical systems assisted by solid-phase humin for enhancing microbial denitrification.
巻・号 122(1)
ページ 85-91
公開日 2016-7-1
DOI 10.1016/j.jbiosc.2015.11.004
PII S1389-1723(15)00406-5
PMID 26905325
MeSH Denitrification* Electricity Electrochemical Techniques Electrodes Electron Transport Electrons Humic Substances* Nitrates / chemistry Nitrates / metabolism Nitrogen / chemistry Nitrogen / metabolism Oxidation-Reduction Pseudomonas stutzeri / metabolism*
IF 2.366
引用数 17
WOS 分野 FOOD SCIENCE & TECHNOLOGY BIOTECHNOLOGY & APPLIED MICROBIOLOGY
リソース情報
一般微生物 JCM 20778