Effect of the Carbon Concentration, Blend Concentration, and Renewal Rate in the Growth Kinetic of Chlorella sp.Reportar como inadecuado




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The Scientific World Journal - Volume 2014 2014, Article ID 205184, 9 pages -

Research Article

Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Italy Avenue on km 8th, P.O. Box 474, 96203-900 Rio Grande, RS, Brazil

Laboratory of Microbiology and Biochemical, College of Chemistry and Food Engineering, Federal University of Rio Grande, Italy Avenue on km 8th, P.O. Box 474, 96203-900 Rio Grande, RS, Brazil

Received 21 August 2014; Accepted 2 October 2014; Published 15 December 2014

Academic Editor: Takashi Osanai

Copyright © 2014 Adriano Arruda Henrard et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The microalgae cultivation can be used as alternative sources of food, in agriculture, residual water treatment, and biofuels production. Semicontinuous cultivation is little studied but is more cost-effective than the discontinuous batch cultivation. In the semicontinuous cultivation, the microalga is maintained in better concentration of nutrients and the photoinhibition by excessive cell is reduced. Thus, biomass productivity and biocompounds of interest, such as lipid productivity, may be higher than in batch cultivation. The objective of this study was to examine the influence of blend concentration, medium renewal rate, and concentration of sodium bicarbonate on the growth of Chlorella sp. during semicontinuous cultivation. The cultivation was carried out in Raceway type bioreactors of 6 L, for 40 d at 30°C, 41.6 µmol m

 s

, and a 12 h light-dark photoperiod. Maximum specific growth rate 0.149 d

and generating biomass 2.89 g L

were obtained when the blend concentration was 0.80 g L

, the medium renewal rate was 40%, and NaHCO3 was 1.60 g L

. The average productivity 0.091 g L

 d

was achieved with 0.8 g L

of blend concentration and NaHCO3 concentration of 1.6 g L

, independent of the medium renewal rate.





Autor: Adriano Arruda Henrard, Gabriel Martins da Rosa, Luiza Moraes, Michele Greque de Morais, and Jorge Alberto Vieira Costa

Fuente: https://www.hindawi.com/



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