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Magnesium aminoclay enhances lipid production of mixotrophic Chlorella sp. KR-1 while reducing bacterial populations.
- Source :
-
Bioresource technology [Bioresour Technol] 2016 Nov; Vol. 219, pp. 608-613. Date of Electronic Publication: 2016 Aug 12. - Publication Year :
- 2016
-
Abstract
- Improving lipid productivity and preventing overgrowth of contaminating bacteria are critical issues relevant to the commercialization of the mixotrophic microalgae cultivation process. In this paper, we report the use of magnesium aminoclay (MgAC) nanoparticles for enhanced lipid production from oleaginous Chlorella sp. KR-1 with simultaneous control of KR-1-associated bacterial growth in mixotrophic cultures with glucose as the model substrate. Addition of 0.01-0.1g/L MgAC promoted microalgal biomass production better than the MgAC-less control, via differential biocidal effects on microalgal and bacterial cells (the latter being more sensitive to MgAC's bio-toxicity than the former). The inhibition effect of MgAC on co-existing bacteria was, as based on density-gradient-gel-electrophoresis (DGGE) analysis, largely dosage-dependent and species-specific. MgAC also, by inducing an oxidative stress environment, increased both the cell size and lipid content of KR-1, resulting in a considerable, ∼25% improvement of mixotrophic algal lipid productivity (to ∼410mgFAME/L/d) compared with the untreated control.<br /> (Copyright © 2016 Elsevier Ltd. All rights reserved.)
- Subjects :
- Bacteria drug effects
Bacteria growth & development
Biomass
Cell Enlargement drug effects
Chlorella growth & development
Chlorella metabolism
Lipids biosynthesis
Magnesium
Microalgae growth & development
Microalgae metabolism
Chlorella drug effects
Coordination Complexes pharmacology
Lipid Metabolism drug effects
Microalgae drug effects
Microbial Consortia drug effects
Nanoparticles metabolism
Propylamines pharmacology
Silanes pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 219
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 27543952
- Full Text :
- https://doi.org/10.1016/j.biortech.2016.08.034