Nitrogen oxidation consortia dynamics influence the performance of full-scale rotating biological contactors

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dc.contributor.author Freeman, D.
dc.contributor.author Bajón Fernández, Yadira
dc.contributor.author Wilson, Andrea
dc.contributor.author McKew, Boyd A.
dc.contributor.author Whitby, Corinne
dc.contributor.author Clark, Dave R.
dc.contributor.author Jefferson, Bruce
dc.contributor.author Coulon, Frederic
dc.contributor.author Hassard, Francis
dc.date.accessioned 2020-01-06T15:43:01Z
dc.date.available 2020-01-06T15:43:01Z
dc.date.issued 2019-12-19
dc.identifier.citation Freeman D, Fernández YB, Wilson A, et al., (2020) Nitrogen oxidation consortia dynamics influence the performance of full-scale rotating biological contactors. Environment International, Volume 135, February 2020, Article number 105354 en_UK
dc.identifier.issn 0160-4120
dc.identifier.uri https://doi.org/10.1016/j.envint.2019.105354
dc.identifier.uri http://dspace.lib.cranfield.ac.uk/handle/1826/14885
dc.description.abstract Ammonia oxidising microorganisms (AOM) play an important role in ammonia removal in wastewater treatment works (WWTW) including rotating biological contactors (RBCs). Environmental factors within RBCs are known to impact the performance of key AOM, such that only some operational RBCs have shown ability for elevated ammonia removal. In this work, long-term treatment performance of seven full-scale RBC systems along with the structure and abundance of the ammonia oxidising bacteria (AOB) and archaea (AOA) communities within microbial biofilms were examined. Long term data showed the dominance of AOB in most RBCs, although two RBCs had demonstrable shift toward an AOA dominated AOM community. Next Generation Sequencing of the 16S rRNA gene revealed diverse evolutionary ancestry of AOB from RBC biofilms while nitrite-oxidising bacteria (NOBs) were similar to reference databases. AOA were more abundant in the biofilms subject to lower organic loading and higher oxygen concentration found at the distal end of RBC systems. Modelling revealed a distinct nitrogen cycling community present within high performing RBCs, linked to efficient control of RBC process variables (retention time, organic loading and oxygen concentration). We present a novel template for enhancing the resilience of RBC systems through microbial community analysis which can guide future strategies for more effective ammonia removal. To best of the author’s knowledge, this is the first comparative study reporting the use of next generation sequencing data on microbial biofilms from RBCs to inform effluent quality of small WWTW. en_UK
dc.language.iso en en_UK
dc.publisher Elsevier en_UK
dc.rights Attribution 4.0 International *
dc.rights.uri http://creativecommons.org/licenses/by/4.0/ *
dc.subject Rotating biological contactor en_UK
dc.subject Nitrification en_UK
dc.subject Wastewater treatment en_UK
dc.subject Biofilm en_UK
dc.subject Ammonia oxidising bacteria en_UK
dc.subject Ammonia oxidising archaea en_UK
dc.subject Ammonia oxidising archaea en_UK
dc.title Nitrogen oxidation consortia dynamics influence the performance of full-scale rotating biological contactors en_UK
dc.type Article en_UK
dc.identifier.cris 25692685


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