Cultivation of aquaculture feed Isochrysis zhangjiangensis in low-cost wave driven floating photobioreactor without aeration device

Chenba Zhu; Desen Han; Yonghai Li; Xiaoqian Zhai; Zhanyou Chi; Yunpeng Zhao; Haibo Cai

doi:10.1016/j.biortech.2019.122018

Cultivation of aquaculture feed Isochrysis zhangjiangensis in low-cost wave driven floating photobioreactor without aeration device

Bioresour Technol. 2019 Dec:293:122018. doi: 10.1016/j.biortech.2019.122018. Epub 2019 Aug 19.

Authors

Chenba Zhu¹, Desen Han², Yonghai Li², Xiaoqian Zhai², Zhanyou Chi³, Yunpeng Zhao⁴, Haibo Cai⁵

Affiliations

¹ School of Bioengineering, Dalian University of Technology, Dalian 116024, China; State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China.
² School of Bioengineering, Dalian University of Technology, Dalian 116024, China.
³ School of Bioengineering, Dalian University of Technology, Dalian 116024, China. Electronic address: chizhy@dlut.edu.cn.
⁴ State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China.
⁵ State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.

PMID: 31476561
DOI: 10.1016/j.biortech.2019.122018

Abstract

This study aimed to use floating photobioreactor (PBR) to produce microalgae biomass for aquaculture applications, and this was tested with cultivation of Isochrysis zhangjiangensis. The highest cell density of 16.1 ± 0.61 × 10⁶ cell L^-1 was obtained in an outdoor culture with a depth of 5.0 cm in 1.0 m² floating PBR, but deeper culture resulted in higher biomass productivity. Large-scale cultivation at size of 10 m² (1000 L) produced the highest cell density of 17.8 × 10⁶ cell L^-1 and highest biomass productivity of 0.115 g L^-1 d^-1, which was at the same level as that for flat-panel PBR (100 L). This developed technique provides an innovative approach to produce microalgae on site for use as fresh aquaculture feed, as well as fresh cells for use as seed inoculums for large-area aquaculture water bodies. This approach provides not only a low-cost microalgae production system but also better integration between microalgae production and aquaculture.

Keywords: Aquaculture; Floating photobioreactor; Isochrysis zhangjiangensis; Microalgae.

MeSH terms

Aquaculture
Biomass
Haptophyta*
Microalgae*
Photobioreactors