4.6 Article

Exploring the dynamics of astaxanthin production in Haematococcus pluvialis biofilms using a rotating biofilm-based system

期刊

BIOTECHNOLOGY AND BIOENGINEERING
卷 -, 期 -, 页码 -

出版社

WILEY
DOI: 10.1002/bit.28624

关键词

astaxanthin; elemental composition; FTIR-spectroscopy; Haematococcus pluvialis; microalgae biofilms; priming

向作者/读者索取更多资源

This study utilized a rotating system to produce the high-value compound astaxanthin using Haematococcus pluvialis biofilms. The effect of nitrogen regime, light intensity, and light history on biofilm traits was assessed, showing that H. pluvialis biofilms follow the classical growth stages of bacterial biofilms and that training the biofilms during the green stage can significantly enhance astaxanthin productivity.
Microalgae biofilm emerged as a solid alternative to conventional suspended cultures which present high operative costs and complex harvesting processes. Among several designs, rotating biofilm-based systems stand out for their scalability, although their primary applications have been in wastewater treatment and aquaculture. In this work, a rotating system was utilized to produce a high-value compound (astaxanthin) using Haematococcus pluvialis biofilms. The effect of nitrogen regime, light intensity, and light history on biofilm traits was assessed to better understand how to efficiently operate the system. Our results show that H. pluvialis biofilms follow the classical growth stages described for bacterial biofilms (from adhesion to maturation) and that a two-stage (green and red stages) allowed to reach astaxanthin productivities of 204 mg m(-2) d(-1) . The higher light intensity applied during the red stage (400 and 800 mu mol m(-2) s(-1) ) combined with nitrogen depletion stimulated similar astaxanthin productivities. However, by training the biofilms during the green stage, using mild-light intensity (200 mu mol m(-2) s(-1) ), a process known as priming, the final astaxanthin productivity was enhanced by 40% with respect to biofilms pre-exposed to 50 mu mol m(-2) s(-1) . Overall, this study shows the possibility of utilizing rotating microalgae biofilms to produce high-value compounds laying the foundation for further biotechnological applications of these emerging systems.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据