Journal
CHEMICAL ENGINEERING JOURNAL
Volume 366, Issue -, Pages 358-367Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.02.080
Keywords
Biomass production; Bioremediation; Chlorella vulgaris; Inhibitory compounds; Nutrients removal
Categories
Funding
- European Regional Development Fund (ERDF) through COMPETE2020 - Programa Operacional Competitividade e Internacionalizacao (POCI)
- FCT/MCTES through national funds (PIDDAC)
- project LEPABE-2-ECO-INNOVATION [NORTE-01-0145-FEDER-000005]
- project AIProcMat@N2020 [NORTE-01-0145-FEDER-000006]
- Norte Portugal Regional Operational Programme (NORTE 2020) under PORTUGAL 2020
- European Regional Development Fund (ERDF)
- FCT [IF/01341/2015, IF/00273/2013]
- CAPES (Brazil) [BEX-1012/13-4]
- [POCI-01-0145-FEDER-031736]
- [POCI-01-0145-FEDER-006939]
- [UID/EQU/00511/2013]
- [POCI-01-0145-FEDER-006984]
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The effect of heavy metals (Cd, Ni, and Zn) on the growth of Chlorella vulgaris and nutrient uptake was assessed. C. vulgaris was cultivated in a synthetic solution with a single or ternary metal system. Biomass growth was well predicted considering a competitive inhibition model. The higher specific growth rate (0.34 d(-1)), biomass productivity (98.1 mg . L-1 . d(-1)), heavy metals uptake efficiency (85%) was obtained for the cultures with Cd and Zn ions. The higher nutrient removal was observed in the presence of Cd ions (91% nitrogen and 99% phosphorus). The highest inhibition on biomass growth (> 88%) was observed in the presence of nickel ions. In the ternary system, microalgae growth inhibition was similar to that observed in the presence of only nickel ions. Although, wastewaters containing nutrients and residual concentrations of zinc and cadmium ions can be used for C. vulgaris production, in the presence of residual concentrations of nickel ions, biomass growth is negligible.
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