Reduction of greenhouse gases emissions during anoxic wastewater treatment by strengthening nitrite-dependent anaerobic methane oxidation process

TitleReduction of greenhouse gases emissions during anoxic wastewater treatment by strengthening nitrite-dependent anaerobic methane oxidation process
Publication TypeJournal Article
Year of Publication2017
AuthorsMa R., Hu Z, Zhang J., Ma H., Jiang L.P, Ru D.Y
JournalBioresource Technology
Volume235
Pagination211-218
Date PublishedJul
ISBN Number0960-8524
Accession NumberWOS:000402479100025
Keywordsoil and degradation
AbstractNitrite-dependent anaerobic methane oxidation (n-damo) is a recently discovered process performed by NC10 phylum, which plays an important role in greenhouse gases (GHG) reduction. In this study, coexistence of n-damo bacteria and methanogens was successfully achieved by using upflow anaerobic sludge blanket (UASB) reactor. Reactor with inorganic carbon source (CO2/H-2) showed the highest abundance of n-damo bacteria and the highest n-damo potential activity, resulted in its highest nitrogen removal rate. Significant reduction in GHG was obtained after introduction of n-damo process, especially for N2O. Furthermore, GHG emissions decreased with the increase of n-damo bacteria abundance. Community structure analysis found carbon source could influence the diversity of n-damo bacteria indirectly. And phylogenetic analysis showed that all the obtained sequences were assigned to group B, mainly due to in situ production and consumption of CH4. (C) 2017 Elsevier Ltd. All rights reserved.
DOI10.1016/j.biortech.2017.03.094