Annual assessment of the wastewater treatment capacity of the microalga Scenedesmus almeriensis and optimisation of operational conditions

Abstract The depth of the culture and the dilution rate have a striking effect on the biomass productivity and the nutrient recovery capacity of microalgal cultures. The combination of culture depth and dilution rate that allows to maximise the performance of the system depends on environmental cond...

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Autores principales:	Ana Sánchez-Zurano, Ainoa Morillas-España, Cintia Gómez-Serrano, Martina Ciardi, Gabriel Acién, Tomás Lafarga
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bbca2ad15cdc4d879cfb2887534ebcb0
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spelling	oai:doaj.org-article:bbca2ad15cdc4d879cfb2887534ebcb02021-11-08T10:47:58ZAnnual assessment of the wastewater treatment capacity of the microalga Scenedesmus almeriensis and optimisation of operational conditions10.1038/s41598-021-01163-z2045-2322https://doaj.org/article/bbca2ad15cdc4d879cfb2887534ebcb02021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01163-zhttps://doaj.org/toc/2045-2322Abstract The depth of the culture and the dilution rate have a striking effect on the biomass productivity and the nutrient recovery capacity of microalgal cultures. The combination of culture depth and dilution rate that allows to maximise the performance of the system depends on environmental conditions. In the current study, a response surface methodology was used to explore the relationship between the two most relevant operational conditions and the biomass productivity achieved in 8.3 m2 pilot-scale raceways operated using urban wastewater. Four polynomial models were developed, one for each season of the year. The software predicted biomass productivities of 12.3, 25.6, 32.7, and 18.9 g·m−2·day−1 in winter, spring, summer, and autumn, respectively. The models were further validated at pilot-scale with R 2 values ranging within 0.81 and 0.91, depending on the season. Lower culture depths had the advantage of minimising nitrification and stripping but allow to process a lower volume of wastewater per surface area. Biomass productivity was higher at culture depths of 0.05 m, when compared to 0.12 and 0.20 m, while the optimal dilution rate was season-dependent. Results reported herein are useful for optimising the biomass productivity of raceway reactors located outdoors throughout the year.Ana Sánchez-ZuranoAinoa Morillas-EspañaCintia Gómez-SerranoMartina CiardiGabriel AciénTomás LafargaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ana Sánchez-Zurano Ainoa Morillas-España Cintia Gómez-Serrano Martina Ciardi Gabriel Acién Tomás Lafarga Annual assessment of the wastewater treatment capacity of the microalga Scenedesmus almeriensis and optimisation of operational conditions
description	Abstract The depth of the culture and the dilution rate have a striking effect on the biomass productivity and the nutrient recovery capacity of microalgal cultures. The combination of culture depth and dilution rate that allows to maximise the performance of the system depends on environmental conditions. In the current study, a response surface methodology was used to explore the relationship between the two most relevant operational conditions and the biomass productivity achieved in 8.3 m2 pilot-scale raceways operated using urban wastewater. Four polynomial models were developed, one for each season of the year. The software predicted biomass productivities of 12.3, 25.6, 32.7, and 18.9 g·m−2·day−1 in winter, spring, summer, and autumn, respectively. The models were further validated at pilot-scale with R 2 values ranging within 0.81 and 0.91, depending on the season. Lower culture depths had the advantage of minimising nitrification and stripping but allow to process a lower volume of wastewater per surface area. Biomass productivity was higher at culture depths of 0.05 m, when compared to 0.12 and 0.20 m, while the optimal dilution rate was season-dependent. Results reported herein are useful for optimising the biomass productivity of raceway reactors located outdoors throughout the year.
format	article
author	Ana Sánchez-Zurano Ainoa Morillas-España Cintia Gómez-Serrano Martina Ciardi Gabriel Acién Tomás Lafarga
author_facet	Ana Sánchez-Zurano Ainoa Morillas-España Cintia Gómez-Serrano Martina Ciardi Gabriel Acién Tomás Lafarga
author_sort	Ana Sánchez-Zurano
title	Annual assessment of the wastewater treatment capacity of the microalga Scenedesmus almeriensis and optimisation of operational conditions
title_short	Annual assessment of the wastewater treatment capacity of the microalga Scenedesmus almeriensis and optimisation of operational conditions
title_full	Annual assessment of the wastewater treatment capacity of the microalga Scenedesmus almeriensis and optimisation of operational conditions
title_fullStr	Annual assessment of the wastewater treatment capacity of the microalga Scenedesmus almeriensis and optimisation of operational conditions
title_full_unstemmed	Annual assessment of the wastewater treatment capacity of the microalga Scenedesmus almeriensis and optimisation of operational conditions
title_sort	annual assessment of the wastewater treatment capacity of the microalga scenedesmus almeriensis and optimisation of operational conditions
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/bbca2ad15cdc4d879cfb2887534ebcb0
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Annual assessment of the wastewater treatment capacity of the microalga Scenedesmus almeriensis and optimisation of operational conditions

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