Influence of wavelength photoperiods and N/P ratio on wastewater treatment with microalgae–bacteria

This research investigates the effect of mixing wavelength light photoperiods (12 h blue, 8 h blue: 4 h green, 4 h blue: 8 h green, and 12 h green) and N/P ratios (1.3 to 8.3) on the growth microalgae–bacteria systems, organic matter, and nutrient removals. The highest microalgae–bacteria growth per...

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Autores principales:	Juan S. Arcila, Daniela Céspedes, Germán Buitrón
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	biomass productivity microalgae–bacteria mixing wavelength photoperiods nutrients removal wastewater Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/079b33856302466f8664e8d04752f16d
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spelling	oai:doaj.org-article:079b33856302466f8664e8d04752f16d2021-11-06T11:16:42ZInfluence of wavelength photoperiods and N/P ratio on wastewater treatment with microalgae–bacteria0273-12231996-973210.2166/wst.2021.257https://doaj.org/article/079b33856302466f8664e8d04752f16d2021-08-01T00:00:00Zhttp://wst.iwaponline.com/content/84/3/712https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732This research investigates the effect of mixing wavelength light photoperiods (12 h blue, 8 h blue: 4 h green, 4 h blue: 8 h green, and 12 h green) and N/P ratios (1.3 to 8.3) on the growth microalgae–bacteria systems, organic matter, and nutrient removals. The highest microalgae–bacteria growth performance (μ = 0.2 d−1, 481.1 ± 15.3 mg DW L−1) was observed when a 8 h blue: 4 h green mixed wavelength and a low N/P ratio were used. For both N/P ratios, biomass productivity was favored when using the blue light dominated at longer time periods. Mechanisms for nitrogen removal by assimilation depend on the N/P ratio, achieving assimilation between 49 and 65% at a low N/P ratio. High nitrogen removal (>50%) showed a strong relation with alkalinity culture conditions (pH > 8.5). The mixing of wavelength photoperiods seems to be a promising strategy to achieve high biomass productivity and nutrient removal. However, for optimal conditions, N/P ratios in the wastewater should be considered. HIGHLIGHTS Mixing wavelength photoperiods and N/P ratio for microalgae–bacteria grown in wastewater was investigated.; The highest biomass productivities were obtained by mixing blue (8 h) and green (4 h) LED wavelengths.; High nitrogen removal and biomass assimilation was observed at a low N/P ratio.; P limitation affects microalgae–bacteria wastewater treatment performance at the high N/P ratio.;Juan S. ArcilaDaniela CéspedesGermán BuitrónIWA Publishingarticlebiomass productivitymicroalgae–bacteriamixing wavelength photoperiodsnutrients removalwastewaterEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 3, Pp 712-724 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biomass productivity microalgae–bacteria mixing wavelength photoperiods nutrients removal wastewater Environmental technology. Sanitary engineering TD1-1066
spellingShingle	biomass productivity microalgae–bacteria mixing wavelength photoperiods nutrients removal wastewater Environmental technology. Sanitary engineering TD1-1066 Juan S. Arcila Daniela Céspedes Germán Buitrón Influence of wavelength photoperiods and N/P ratio on wastewater treatment with microalgae–bacteria
description	This research investigates the effect of mixing wavelength light photoperiods (12 h blue, 8 h blue: 4 h green, 4 h blue: 8 h green, and 12 h green) and N/P ratios (1.3 to 8.3) on the growth microalgae–bacteria systems, organic matter, and nutrient removals. The highest microalgae–bacteria growth performance (μ = 0.2 d−1, 481.1 ± 15.3 mg DW L−1) was observed when a 8 h blue: 4 h green mixed wavelength and a low N/P ratio were used. For both N/P ratios, biomass productivity was favored when using the blue light dominated at longer time periods. Mechanisms for nitrogen removal by assimilation depend on the N/P ratio, achieving assimilation between 49 and 65% at a low N/P ratio. High nitrogen removal (>50%) showed a strong relation with alkalinity culture conditions (pH > 8.5). The mixing of wavelength photoperiods seems to be a promising strategy to achieve high biomass productivity and nutrient removal. However, for optimal conditions, N/P ratios in the wastewater should be considered. HIGHLIGHTS Mixing wavelength photoperiods and N/P ratio for microalgae–bacteria grown in wastewater was investigated.; The highest biomass productivities were obtained by mixing blue (8 h) and green (4 h) LED wavelengths.; High nitrogen removal and biomass assimilation was observed at a low N/P ratio.; P limitation affects microalgae–bacteria wastewater treatment performance at the high N/P ratio.;
format	article
author	Juan S. Arcila Daniela Céspedes Germán Buitrón
author_facet	Juan S. Arcila Daniela Céspedes Germán Buitrón
author_sort	Juan S. Arcila
title	Influence of wavelength photoperiods and N/P ratio on wastewater treatment with microalgae–bacteria
title_short	Influence of wavelength photoperiods and N/P ratio on wastewater treatment with microalgae–bacteria
title_full	Influence of wavelength photoperiods and N/P ratio on wastewater treatment with microalgae–bacteria
title_fullStr	Influence of wavelength photoperiods and N/P ratio on wastewater treatment with microalgae–bacteria
title_full_unstemmed	Influence of wavelength photoperiods and N/P ratio on wastewater treatment with microalgae–bacteria
title_sort	influence of wavelength photoperiods and n/p ratio on wastewater treatment with microalgae–bacteria
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/079b33856302466f8664e8d04752f16d
work_keys_str_mv	AT juansarcila influenceofwavelengthphotoperiodsandnpratioonwastewatertreatmentwithmicroalgaebacteria AT danielacespedes influenceofwavelengthphotoperiodsandnpratioonwastewatertreatmentwithmicroalgaebacteria AT germanbuitron influenceofwavelengthphotoperiodsandnpratioonwastewatertreatmentwithmicroalgaebacteria
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Influence of wavelength photoperiods and N/P ratio on wastewater treatment with microalgae–bacteria

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