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Community structure of partial nitritation-anammox biofilms at decreasing substrate concentrations and low temperature
Chalmers, Div Water Environm Technol, Dept Civil & Environm Engn, SE-41296 Gothenburg, Sweden..ORCID iD: 0000-0002-0269-9375
Univ Gothenburg, Dept Chem & Mol Biol, SE-40530 Gothenburg, Sweden..ORCID iD: 0000-0001-5988-4048
Univ Gothenburg, Dept Chem & Mol Biol, SE-40530 Gothenburg, Sweden..
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.
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2017 (English)In: Microbial Biotechnology, ISSN 1751-7907, E-ISSN 1751-7915, Vol. 10, no 4, p. 761-772Article in journal (Refereed) Published
Abstract [en]

Partial nitritation-anammox (PNA) permits energy effective nitrogen removal. Today PNA is used for treatment of concentrated and warm side streams at wastewater treatment plants, but not the more diluted and colder main stream. To implement PNA in the main stream, better knowledge about microbial communities at the typical environmental conditions is necessary. In order to investigate the response of PNA microbial communities to decreasing substrate availability, we have operated a moving bed biofilm reactor (MBBR) at decreasing reactor concentrations (311-27mg-N l(-1) of ammonium) and low temperature (13 degrees C) for 302days and investigated the biofilm community using high throughput amplicon sequencing; quantitative PCR; and fluorescence insitu hybridization. The anammox bacteria (Ca. Brocadia) constituted a large fraction of the biomass with fewer aerobic ammonia oxidizing bacteria (AOB) and even less nitrite oxidizing bacteria (NOB; Nitrotoga, Nitrospira and Nitrobacter). Still, NOB had considerable impact on the process performance. The anammox bacteria, AOB and NOB all harboured more than one population, indicating some diversity, and the heterotrophic bacterial community was diverse (seven phyla). Despite the downshifts in substrate availability, changes in the relative abundance and composition of anammox bacteria, AOB and NOB were small and also the heterotrophic community showed little changes in composition. This indicates stability of PNA MBBR communities towards decreasing substrate availability and suggests that even heterotrophic bacteria are integral components of these communities.

Place, publisher, year, edition, pages
Wiley , 2017. Vol. 10, no 4, p. 761-772
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Microbiology
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URN: urn:nbn:se:kth:diva-243530DOI: 10.1111/1751-7915.12435ISI: 000404123100012PubMedID: 27863060Scopus ID: 2-s2.0-85003968478OAI: oai:DiVA.org:kth-243530DiVA, id: diva2:1286660
Note

QC 20190207

Available from: 2019-02-07 Created: 2019-02-07 Last updated: 2019-02-07Bibliographically approved

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