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Enhancing Photon Utilization Efficiency for Astaxanthin Production from Haematococcus lacustris Using a Split-Column

Z-Hun Kim¹, Hanwool Park¹, Ho-Sang Lee¹

¹National Marine Bioenergy R&D Center & Department of Biological Engineering, Inha University, Incheon 22212, Republic of Korea.

Journal of Microbiology and Biotechnology

|April 9, 2016

Summary

A novel split-column photobioreactor (SC-PBR) significantly boosts astaxanthin production from Haematococcus lacustris. This innovative design improves photon utilization efficiency by up to 366% compared to standard systems.

Keywords:

Bubble-column photobioreactor Haematococcus astaxanthin liquid circulation photon efficiency

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Area of Science:

Biotechnology
Algal Biotechnology
Photosynthesis Research

Background:

Haematococcus lacustris is a microalga known for astaxanthin production.
Efficient light utilization is crucial for optimizing microalgal cultivation.
Standard photobioreactors face challenges in maximizing photon efficiency.

Purpose of the Study:

To develop and evaluate a split-column photobioreactor (SC-PBR) for enhanced astaxanthin production.
To improve photon utilization efficiency in Haematococcus lacustris cultivation.
To compare the performance of SC-PBR with a standard bubble-column photobioreactor (BC-PBR).

Main Methods:

Designed a split-column photobioreactor with two columns of different sizes, illuminating only the smaller column.
Cultivated Haematococcus lacustris in both SC-PBR and BC-PBR systems.
Measured and compared astaxanthin productivity and photon utilization efficiencies between the two reactor types.

Main Results:

The SC-PBR demonstrated a 28% improvement in astaxanthin productivity compared to the BC-PBR.
Photon utilization efficiencies in the SC-PBR were 28-366% higher than in the BC-PBR.
The targeted illumination strategy in SC-PBR effectively enhanced astaxanthin yield.

Conclusions:

The split-column photobioreactor design is effective for increasing astaxanthin production.
Optimized light regimes, as achieved by SC-PBR, significantly enhance algal productivity.
SC-PBR offers a promising approach for more efficient astaxanthin biosynthesis in microalgae.