Overcoming Microalgae Harvesting Barrier by Activated Algae Granules

Abstract The economic factor of the microalgae harvesting step acts as a barrier to scaling up microalgae-based technology designed for wastewater treatment. In view of that, this study presents an alternative microalgae-bacteria system, which is proposed for eliminating the economic obstacle. Inste...

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Autores principales:	Olga Tiron, Costel Bumbac, Elena Manea, Mihai Stefanescu, Mihai Nita Lazar
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7bb157f6a2d546dbae16f7cbb6c53069
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spelling	oai:doaj.org-article:7bb157f6a2d546dbae16f7cbb6c530692021-12-02T11:53:04ZOvercoming Microalgae Harvesting Barrier by Activated Algae Granules10.1038/s41598-017-05027-32045-2322https://doaj.org/article/7bb157f6a2d546dbae16f7cbb6c530692017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05027-3https://doaj.org/toc/2045-2322Abstract The economic factor of the microalgae harvesting step acts as a barrier to scaling up microalgae-based technology designed for wastewater treatment. In view of that, this study presents an alternative microalgae-bacteria system, which is proposed for eliminating the economic obstacle. Instead of the microalgae-bacteria (activated algae) flocs, the study aimed to develop activated algae granules comprising the microalgae Chlorella sp. as a target species. The presence of the filamentous microalgae (Phormidium sp.) was necessary for the occurrence of the granulation processes. A progressive decrease in frequency of the free Chlorella sp. cells was achieved once with the development of the activated algae granules as a result of the target microalgae being captured in the dense and tangled network of filaments. The mature activated algae granules ranged between 600 and 2,000 µm, and were characterized by a compact structure and significant settling ability (21.6 ± 0.9 m/h). In relation to the main aim of this study, a microalgae recovery efficiency of higher than 99% was achieved only by fast sedimentation of the granules; this performance highlighted the viability of the granular activated algae system for sustaining a microalgae harvesting procedure with neither cost nor energy inputs.Olga TironCostel BumbacElena ManeaMihai StefanescuMihai Nita LazarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Olga Tiron Costel Bumbac Elena Manea Mihai Stefanescu Mihai Nita Lazar Overcoming Microalgae Harvesting Barrier by Activated Algae Granules
description	Abstract The economic factor of the microalgae harvesting step acts as a barrier to scaling up microalgae-based technology designed for wastewater treatment. In view of that, this study presents an alternative microalgae-bacteria system, which is proposed for eliminating the economic obstacle. Instead of the microalgae-bacteria (activated algae) flocs, the study aimed to develop activated algae granules comprising the microalgae Chlorella sp. as a target species. The presence of the filamentous microalgae (Phormidium sp.) was necessary for the occurrence of the granulation processes. A progressive decrease in frequency of the free Chlorella sp. cells was achieved once with the development of the activated algae granules as a result of the target microalgae being captured in the dense and tangled network of filaments. The mature activated algae granules ranged between 600 and 2,000 µm, and were characterized by a compact structure and significant settling ability (21.6 ± 0.9 m/h). In relation to the main aim of this study, a microalgae recovery efficiency of higher than 99% was achieved only by fast sedimentation of the granules; this performance highlighted the viability of the granular activated algae system for sustaining a microalgae harvesting procedure with neither cost nor energy inputs.
format	article
author	Olga Tiron Costel Bumbac Elena Manea Mihai Stefanescu Mihai Nita Lazar
author_facet	Olga Tiron Costel Bumbac Elena Manea Mihai Stefanescu Mihai Nita Lazar
author_sort	Olga Tiron
title	Overcoming Microalgae Harvesting Barrier by Activated Algae Granules
title_short	Overcoming Microalgae Harvesting Barrier by Activated Algae Granules
title_full	Overcoming Microalgae Harvesting Barrier by Activated Algae Granules
title_fullStr	Overcoming Microalgae Harvesting Barrier by Activated Algae Granules
title_full_unstemmed	Overcoming Microalgae Harvesting Barrier by Activated Algae Granules
title_sort	overcoming microalgae harvesting barrier by activated algae granules
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7bb157f6a2d546dbae16f7cbb6c53069
work_keys_str_mv	AT olgatiron overcomingmicroalgaeharvestingbarrierbyactivatedalgaegranules AT costelbumbac overcomingmicroalgaeharvestingbarrierbyactivatedalgaegranules AT elenamanea overcomingmicroalgaeharvestingbarrierbyactivatedalgaegranules AT mihaistefanescu overcomingmicroalgaeharvestingbarrierbyactivatedalgaegranules AT mihainitalazar overcomingmicroalgaeharvestingbarrierbyactivatedalgaegranules
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Overcoming Microalgae Harvesting Barrier by Activated Algae Granules

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