Growing Chlorella vulgaris in Photobioreactor by Continuous Process Using Concentrated Desalination: Effect of Dilution Rate on Biochemical Composition

International Journal of Chemical Engineering. 2014;2014 DOI 10.1155/2014/310285

 

Journal Homepage

Journal Title: International Journal of Chemical Engineering

ISSN: 1687-806X (Print); 1687-8078 (Online)

Publisher: Hindawi Publishing Corporation

LCC Subject Category: Technology: Chemical technology: Chemical engineering

Country of publisher: Egypt

Language of fulltext: English

Full-text formats available: PDF, HTML, ePUB, XML

 

AUTHORS

Ângelo Paggi Matos (Department of Food Science and Technology, Federal University of Santa Catarina, Avenue Admar Gonzaga 1346, Itacorubi, 88034-001 Florianopolis, SC, Brazil)
Regina Coeli de Oliveira Torres (Department of Food Science and Technology, Federal University of Santa Catarina, Avenue Admar Gonzaga 1346, Itacorubi, 88034-001 Florianopolis, SC, Brazil)
Luiz Rodrigo Ito Morioka (Department of Food Science and Technology, Federal University of Santa Catarina, Avenue Admar Gonzaga 1346, Itacorubi, 88034-001 Florianopolis, SC, Brazil)
Elisa Helena Siegel Moecke (Department of Food Science and Technology, Federal University of Santa Catarina, Avenue Admar Gonzaga 1346, Itacorubi, 88034-001 Florianopolis, SC, Brazil)
Kepler Borges França (Department of Chemical Engineering, Federal University of Campina Grande, Avenue Aprigio Veloso 882, Bodocongo, 58429-170 Campina Grande, PB, Brazil)
Ernani Sebastião Sant’Anna (Department of Food Science and Technology, Federal University of Santa Catarina, Avenue Admar Gonzaga 1346, Itacorubi, 88034-001 Florianopolis, SC, Brazil)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 14 weeks

 

Abstract | Full Text

Desalination wastewater, which contains large amount of salt waste, might lead to severely environmental pollution. This study evaluated the effect of dilution rate (0.1≤D≤0.3 day−1) on microalgal biomass productivity, lipid content, and fatty acid profile under steady-state condition of Chlorella vulgaris supplemented with concentrated desalination. Continuous culture was conducted for 55 days. Results show that the biomass productivity (Px) varied from 57 to 126 mg L−1 d−1 (dry mass) when the dilution rate ranged from 0.1 to 0.3 day−1. At lowest dilution rate (D=0.1 day−1), the continuous culture regime ensured the highest values of maximum biomass concentration (Xm=570±20 mL−1) and protein content (52%). Biomass lipid content was an increasing function of D. The most abundant fatty acids were the palmitic (25.3±0.6%) at D=0.1 day−1 and the gamma-linolenic acid (23.5±0.1%) at D=0.3 day−1 ones. These fatty acids present 14 to 18 carbons in the carbon chain, being mainly saturated and polyunsaturated, respectively. Overall, the results show that continuous culture is a powerful tool to investigate the cell growth kinetics and physiological behaviors of the algae growing on desalination wastewater.