Effect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures

Abstract The slow growth rate and high optimal temperatures for the anaerobic ammonium oxidation (anammox) bacteria are significant limitations of the anammox processes application in the treatment of mainstream of wastewater entering wastewater treatment plant (WWTP). In this study, we investigate...

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Autores principales:	Anna Banach-Wiśniewska, Mariusz Tomaszewski, Mohamed S. Hellal, Aleksandra Ziembińska-Buczyńska
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2dfc097b36de48d08ef0effe51f1b5c4
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spelling	oai:doaj.org-article:2dfc097b36de48d08ef0effe51f1b5c42021-12-02T15:23:03ZEffect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures10.1038/s41598-020-80747-72045-2322https://doaj.org/article/2dfc097b36de48d08ef0effe51f1b5c42021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80747-7https://doaj.org/toc/2045-2322Abstract The slow growth rate and high optimal temperatures for the anaerobic ammonium oxidation (anammox) bacteria are significant limitations of the anammox processes application in the treatment of mainstream of wastewater entering wastewater treatment plant (WWTP). In this study, we investigate the nitrogen removal and microbial community changes in sodium alginate (SA) and sodium alginate–reduced graphene oxide (SA-RGO) carriers, depending on the process temperature, with a particular emphasis on the temperature close to the mainstream of wastewater entering the WWTP. The RGO addition to the SA matrix causes suppression of the beads swelling, which intern modifies the mechanical properties of the gel beads. The effect of the temperature drop on the nitrogen removal rate was reduced for biomass entrapped in SA and SA-RGO gel beads in comparison to non-immobilized biomass, this suggests a ‘‘protective” effect caused by immobilization. However, analyses performed using next-generation sequencing (NGS) and qPCR revealed that the microbial community composition and relative gene abundance changed significantly, after the implementation of the new process conditions. The microbial community inside the gel beads was completely remodelled, in comparison with inoculum, and denitrification contributed to the nitrogen transformation inside the beads.Anna Banach-WiśniewskaMariusz TomaszewskiMohamed S. HellalAleksandra Ziembińska-BuczyńskaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Anna Banach-Wiśniewska Mariusz Tomaszewski Mohamed S. Hellal Aleksandra Ziembińska-Buczyńska Effect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures
description	Abstract The slow growth rate and high optimal temperatures for the anaerobic ammonium oxidation (anammox) bacteria are significant limitations of the anammox processes application in the treatment of mainstream of wastewater entering wastewater treatment plant (WWTP). In this study, we investigate the nitrogen removal and microbial community changes in sodium alginate (SA) and sodium alginate–reduced graphene oxide (SA-RGO) carriers, depending on the process temperature, with a particular emphasis on the temperature close to the mainstream of wastewater entering the WWTP. The RGO addition to the SA matrix causes suppression of the beads swelling, which intern modifies the mechanical properties of the gel beads. The effect of the temperature drop on the nitrogen removal rate was reduced for biomass entrapped in SA and SA-RGO gel beads in comparison to non-immobilized biomass, this suggests a ‘‘protective” effect caused by immobilization. However, analyses performed using next-generation sequencing (NGS) and qPCR revealed that the microbial community composition and relative gene abundance changed significantly, after the implementation of the new process conditions. The microbial community inside the gel beads was completely remodelled, in comparison with inoculum, and denitrification contributed to the nitrogen transformation inside the beads.
format	article
author	Anna Banach-Wiśniewska Mariusz Tomaszewski Mohamed S. Hellal Aleksandra Ziembińska-Buczyńska
author_facet	Anna Banach-Wiśniewska Mariusz Tomaszewski Mohamed S. Hellal Aleksandra Ziembińska-Buczyńska
author_sort	Anna Banach-Wiśniewska
title	Effect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures
title_short	Effect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures
title_full	Effect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures
title_fullStr	Effect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures
title_full_unstemmed	Effect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures
title_sort	effect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2dfc097b36de48d08ef0effe51f1b5c4
work_keys_str_mv	AT annabanachwisniewska effectofbiomassimmobilizationandreducedgrapheneoxideonthemicrobialcommunitychangesandnitrogenremovalatlowtemperatures AT mariusztomaszewski effectofbiomassimmobilizationandreducedgrapheneoxideonthemicrobialcommunitychangesandnitrogenremovalatlowtemperatures AT mohamedshellal effectofbiomassimmobilizationandreducedgrapheneoxideonthemicrobialcommunitychangesandnitrogenremovalatlowtemperatures AT aleksandraziembinskabuczynska effectofbiomassimmobilizationandreducedgrapheneoxideonthemicrobialcommunitychangesandnitrogenremovalatlowtemperatures
_version_	1718387314754846720

Effect of biomass immobilization and reduced graphene oxide on the microbial community changes and nitrogen removal at low temperatures

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