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Application of growth-phase based light-feeding strategies to simultaneously enhance Chlorella vulgaris growth and lipid accumulation.

Abstract：

:Considering the variations of optimal light intensity required by microalgae cells along with growth phases, growth-phase light-feeding strategies were proposed and verified in this paper, aiming at boosting microalgae lipid productivity from the perspective of light conditions optimization. Experimental results demonstrate that under an identical time-averaged light intensity, the light-feeding strategies characterized by stepwise incremental light intensities showed a positive effect on biomass and lipid accumulation. The lipid productivity (235.49 mg L-1 d-1) attained under light-feeding strategy V (time-averaged light intensity: 225 μmol m-2 s-1) was 52.38% higher over that obtained under a constant light intensity of 225 μmol m-2 s-1. Subsequently, based on light-feeding strategy V, microalgae lipid productivity was further elevated to 312.92 mg L-1 d-1 employing a two-stage based light-feeding strategy V560 (time-averaged light intensity: 360 μmol m-2 s-1), which was 79.63% higher relative to that achieved under a constant light intensity of 360 μmol m-2 s-1.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Sun Y,Liao Q,Huang Y,Xia A,Fu Q,Zhu X,Fu J,Li J

doi

10.1016/j.biortech.2018.02.045

subject

Has Abstract

pub_date

2018-05-01 00:00:00

pages

421-430

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(18)30229-3

journal_volume

256

pub_type

杂志文章

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