Cultivation of Chlorella vulgaris in anaerobically digested gelatin industry wastewater

This work aimed to study the effect of using anaerobically digested gelatin industry wastewater as a culture medium for the cultivation of Chlorella vulgaris microalgae in bubble column photobioreactors (PBRs). Batch experiments were carried out to determine the growth kinetics by inoculating microa...

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Autores principales:	G. C. Blanco, M. J. Stablein, G. Tommaso
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	biomass production chlorella vulgaris gelatin industry kinetic modelling lipids wastewater post-treatment Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/c014577d4a7848a3b527ef59ea135dd8
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spelling	oai:doaj.org-article:c014577d4a7848a3b527ef59ea135dd82021-11-06T07:18:09ZCultivation of Chlorella vulgaris in anaerobically digested gelatin industry wastewater1606-97491607-079810.2166/ws.2020.263https://doaj.org/article/c014577d4a7848a3b527ef59ea135dd82021-08-01T00:00:00Zhttp://ws.iwaponline.com/content/21/5/1953https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798This work aimed to study the effect of using anaerobically digested gelatin industry wastewater as a culture medium for the cultivation of Chlorella vulgaris microalgae in bubble column photobioreactors (PBRs). Batch experiments were carried out to determine the growth kinetics by inoculating microalgae in wastewater prepared with different dilutions and supplemented with Bold's Basal Medium (BBM). From the values of the saturation constants (KS = 50.25 mgN-NH4+·L−1) and substrate inhibition (KI = 28.12 mgN-NH4+·L−1) obtained in the adjustment to the Andrews kinetic model (R2 = 0.817), the PBRs achieved specific maximum growth rates (μmax) of 0.343 d−1, biomass productivity of 0.141 g·L−1·d−1, lipid content of 12.45%, lipid productivity of 17.63 mg·L−1·d−1 and instantaneous ammoniacal nitrogen consumption rates of 20.06 and 14.22 mg·L−1·d−1. The addition of wastewater to the culture medium provided an increase in biomass productivity of 57.45% in relation to the negative control. The results obtained demonstrate the high efficiency of C. vulgaris in the removal of nitrogenous compounds and the potential of using anaerobically digested gelatin industry wastewater in the production of microalgae biomass. HIGHLIGHTS The use of wastewater in bubble column photobioreactors (PBRs) provided a 57.45% increase in biomass productivity (PB).; Andrews model successfully predicted the growth kinetics of C. vulgaris in wastewater (R2 = 0.817).; Ammoniacal nitrogen (N-NHx) was preferred compared with nitrate (N-NO3) during the operation of photobioreactors.; The first-order decay model with residual successfully predicted the kinetics of nitrate (N-NO3) consumption.; Two first-order decay models with residuals in series better represented the ammoniacal nitrogen (N-NHx) depletion.;G. C. BlancoM. J. StableinG. TommasoIWA Publishingarticlebiomass productionchlorella vulgarisgelatin industrykinetic modellinglipidswastewater post-treatmentWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 5, Pp 1953-1965 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biomass production chlorella vulgaris gelatin industry kinetic modelling lipids wastewater post-treatment Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	biomass production chlorella vulgaris gelatin industry kinetic modelling lipids wastewater post-treatment Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 G. C. Blanco M. J. Stablein G. Tommaso Cultivation of Chlorella vulgaris in anaerobically digested gelatin industry wastewater
description	This work aimed to study the effect of using anaerobically digested gelatin industry wastewater as a culture medium for the cultivation of Chlorella vulgaris microalgae in bubble column photobioreactors (PBRs). Batch experiments were carried out to determine the growth kinetics by inoculating microalgae in wastewater prepared with different dilutions and supplemented with Bold's Basal Medium (BBM). From the values of the saturation constants (KS = 50.25 mgN-NH4+·L−1) and substrate inhibition (KI = 28.12 mgN-NH4+·L−1) obtained in the adjustment to the Andrews kinetic model (R2 = 0.817), the PBRs achieved specific maximum growth rates (μmax) of 0.343 d−1, biomass productivity of 0.141 g·L−1·d−1, lipid content of 12.45%, lipid productivity of 17.63 mg·L−1·d−1 and instantaneous ammoniacal nitrogen consumption rates of 20.06 and 14.22 mg·L−1·d−1. The addition of wastewater to the culture medium provided an increase in biomass productivity of 57.45% in relation to the negative control. The results obtained demonstrate the high efficiency of C. vulgaris in the removal of nitrogenous compounds and the potential of using anaerobically digested gelatin industry wastewater in the production of microalgae biomass. HIGHLIGHTS The use of wastewater in bubble column photobioreactors (PBRs) provided a 57.45% increase in biomass productivity (PB).; Andrews model successfully predicted the growth kinetics of C. vulgaris in wastewater (R2 = 0.817).; Ammoniacal nitrogen (N-NHx) was preferred compared with nitrate (N-NO3) during the operation of photobioreactors.; The first-order decay model with residual successfully predicted the kinetics of nitrate (N-NO3) consumption.; Two first-order decay models with residuals in series better represented the ammoniacal nitrogen (N-NHx) depletion.;
format	article
author	G. C. Blanco M. J. Stablein G. Tommaso
author_facet	G. C. Blanco M. J. Stablein G. Tommaso
author_sort	G. C. Blanco
title	Cultivation of Chlorella vulgaris in anaerobically digested gelatin industry wastewater
title_short	Cultivation of Chlorella vulgaris in anaerobically digested gelatin industry wastewater
title_full	Cultivation of Chlorella vulgaris in anaerobically digested gelatin industry wastewater
title_fullStr	Cultivation of Chlorella vulgaris in anaerobically digested gelatin industry wastewater
title_full_unstemmed	Cultivation of Chlorella vulgaris in anaerobically digested gelatin industry wastewater
title_sort	cultivation of chlorella vulgaris in anaerobically digested gelatin industry wastewater
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/c014577d4a7848a3b527ef59ea135dd8
work_keys_str_mv	AT gcblanco cultivationofchlorellavulgarisinanaerobicallydigestedgelatinindustrywastewater AT mjstablein cultivationofchlorellavulgarisinanaerobicallydigestedgelatinindustrywastewater AT gtommaso cultivationofchlorellavulgarisinanaerobicallydigestedgelatinindustrywastewater
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Cultivation of Chlorella vulgaris in anaerobically digested gelatin industry wastewater

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