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The role of inoculum and reactor configuration for microbial community composition and dynamics in mainstream partial nitritation anammox reactors

Agrawal, Shelesh and Karst, Søren M. and Gilbert, Eva M. and Horn, Harald and Nielsen, Per H. and Lackner, Susanne :
The role of inoculum and reactor configuration for microbial community composition and dynamics in mainstream partial nitritation anammox reactors.
[Online-Edition]
In: MicrobiologyOpen, 6 (2) ISSN 2045-8827
[Article], (2017)

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Item Type: Article
Title: The role of inoculum and reactor configuration for microbial community composition and dynamics in mainstream partial nitritation anammox reactors
Language: English
Abstract:

Implementation of partial nitritation anammox (PNA) in the mainstream (municipal wastewater treatment) is still under investigation. Microbial community structure and reactor type can influence the performance of PNA reactor; yet, little is known about the role of the community composition of the inoculum and the reactor configuration under mainstream conditions. Therefore, this study investigated the community structure of inocula of different origin and their consecutive community dynamics in four different lab-scale PNA reactors with 16S rRNA gene amplicon sequencing. These reactors were operated for almost 1 year and subjected to realistic seasonal temperature fluctuations as in moderate climate regions, that is, from 20°C in summer to 10°C in winter. The sequencing analysis revealed that the bacterial community in the reactors comprised: (1) a nitrifying community (consisting of anaerobic ammonium-oxidizing bacteria (AnAOB), ammonia-oxidizing bacteria (AOB), and nitrite-oxidizing bacteria (NOB)); (2) different heterotrophic denitrifying bacteria and other putative heterotrophic bacteria (HB). The nitrifying community was the same in all four reactors at the genus level, although the biomasses were of different origin. Community dynamics revealed a stable community in the moving bed biofilm reactors (MBBR) in contrast to the sequencing batch reactors (SBR) at the genus level. Moreover, the reactor design seemed to influence the community dynamics, and reactor operation significantly influenced the overall community composition. The MBBR seems to be the reactor type of choice for mainstream wastewater treatment.

Journal or Publication Title: MicrobiologyOpen
Volume: 6
Number: 2
Publisher: Wiley
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 13 Faculty of Civil and Environmental Engineering > Institute IWAR > Wastewater Technology
Date Deposited: 11 Apr 2017 09:20
Last Modified: 15 May 2017 11:13
Official URL: http://doi.org/10.1002/mbo3.456
URN: urn:nbn:de:tuda-tuprints-61409
Identification Number: 10.1002/mbo3.456
URI: http://tuprints.ulb.tu-darmstadt.de/id/eprint/6140
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