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Title 

Nitrogen modulation under chemostat cultivation mode induces biomass and lipid production by Chlorella vulgaris and reduces antenna pigment accumulation

Authors 

Gichul ChoDae Hyun ChoJinA HeoUrim KimYong Jae LeeDong Yun ChoiHee-Sik Kim

Publisher 

Elsevier

Issue Date 

2019

Citation 

Bioresource Technology

Keywords 

Antenna pigmentBiomassChemostatChlorophyllMicroalgaeNitrogen

Abstract 

Algal growth limitation in large-scale cultivation mostly results from high level synthesis of photosynthetic pigments, owing to self-shading effects and attenuation of light distribution. To overcome this problem, here we investigated the influence of nitrogen modulation on changes in antenna pigments as well as biomass and lipid production by Chlorella vulgaris under a chemostat continuous cultivation mode. The production of algal antenna pigments, including chlorophylls and carotenoids, was promoted in a total nitrogen (TN) concentration-dependent manner. Maximum algal biomass and lipid production were obtained from 70?mg/L of TN concentration along with a significant increase in light transmittance and reduction in antenna pigments. Furthermore, the composition of polyunsaturated fatty acids remarkably augmented at low TN concentrations. These results suggest that the reduction in algal antenna pigment synthesis via modulation of nitrogen concentration may serve as an effective strategy to enhance algal biomass and lipid production.

URI 

https://doi.org/10.1016/j.biortech.2019.02.063

ISSN 

0960-8524

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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