Effective astaxanthin production from flocculated Haematococcus pluvialis via biofilm cultivation in a tri-layer tray bioreactor

文献类型： 外文期刊

第一作者： Zhang, Yating

作者： Zhang, Yating;Su, Dong;Zhao, Ling;Yu, Yueqin;Zhang, Yating;Wang, Xixi;Zhao, Ling;Leng, Kailiang;Miao, Junkui;Leng, Kailiang

作者机构：

关键词： Haematococcus pluvialis; Biofilm cultivation; Astaxanthin production; Tri-layer tray bioreactor; Biofilm redistribution; Flocculation

期刊名称：JOURNAL OF BIOTECHNOLOGY （ 影响因子：3.9； 五年影响因子：3.8 ）

ISSN： 0168-1656

年卷期： 2025 年 405 卷

页码：

收录情况： SCI

摘要： Haematococcus pluvialis, renowned for its high astaxanthin content, is a prime candidate for commercial-scale production of natural astaxanthin. While biofilm cultivation shows potential for enhancing astaxanthin accumulation in H. pluvialis, it faces challenges in effectively harvesting green-vegetative H. pluvialis and mitigating the "dark zone" issue within the biofilm. Our study demonstrated that flocculation using a combination of chitosan and NaOH was an effective method for harvesting green-vegetative H. pluvialis, which surpasses centrifugation in both biomass and astaxanthin production. A tri-layer tray bioreactor was developed to enhance astaxanthin production via biofilm redistribution by using a rinsing method, and its effectiveness was further supported by a tray photobioreactor with an integrated automatic rinsing system. The biofilm method achieved an optimal specific light energy consumption for astaxanthin production of 9.42 kWh g-1 at the light intensity of 150 mu mol m-2 s-1, presenting its potential for commercial-scale cultivation of H. pluvialis for astaxanthin production.

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