Effective astaxanthin production from flocculated Haematococcus pluvialis via biofilm cultivation in a tri-layer tray bioreactor
文献类型： 外文期刊
作者： Zhang, Yating 1 ; Wang, Xixi 2 ; Su, Dong 1 ; Zhao, Ling 1 ; Leng, Kailiang 2 ; Miao, Junkui 2 ; Yu, Yueqin 1 ;
作者机构： 1.Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, State Key Lab Ecochem Engn, Qingdao 266042, Peoples R China
2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao Engn Res Ctr Polar Fishery Resources Explo, Minist Agr,Key Lab Sustainable Marine Fishery Dev, Qingdao 266071, Peoples R China
3.Qingdao Marine Sci & Technol Ctr, Lab Marine Drugs & Bioprod, Qingdao 266237, Peoples R China
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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