Potato starch production side stream is a suitable medium for microalgae cultivation

IF 4.5 2区生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-10-01 DOI:10.1016/j.algal.2025.104328

Luka Šupraha , Margarida Costa , Trine Dale , Minna Kahala , Vesa Joutsjoki , Anne Pihlanto , Ethan Wood , Yan Li

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引用次数: 0

Abstract

Agro-industrial side streams can provide alternative substrates for microalgae cultivation and sustainable production of valuable bioproducts through recycling and re-use of limited resources. This work explored the potential for using a side stream from potato starch production (evaporation-concentrated potato cell fluid, potato juice) as an alternative medium for scaled-up cultivation of microalgae. A high-throughput screening approach was employed to identify strains of green algae that can grow in the side stream. The selected candidate strains were tested further in optimization experiments to determine the suitable side stream concentration and optimal light intensity. Finally, two strains with the highest specific growth rates in the side stream, Chlorella sp. (NIVA-CHL 15) and Chlorococcum sp. (NIVA-CHL 103) were cultivated in 3 L flat-panel photobioreactors. The biomass was harvested and assessed for the content of carotenoids, fatty acids and amino acids. The 1 % potato juice medium supported growth rates and biomass yield comparable to the commercial algal media, with similar biochemical profiles of the harvested biomass. These results demonstrate that microalgae biotechnology can be employed to valorise unexploited side streams from potato starch production, adding a circular value to this agro-industrial process.

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马铃薯淀粉生产侧流是适宜微藻培养的培养基

农业工业侧流可以通过回收和再利用有限的资源，为微藻的培养和有价值的生物产品的可持续生产提供替代基质。这项工作探索了利用马铃薯淀粉生产的侧流（蒸发浓缩的马铃薯细胞液，马铃薯汁）作为微藻大规模培养的替代培养基的潜力。采用高通量筛选方法鉴定能在侧流中生长的绿藻菌株。选择的候选菌株在优化实验中进一步测试，以确定合适的侧流浓度和最佳光强。最后，在3 L平板光生物反应器中培养了侧流比生长率最高的两种菌株小球藻（Chlorella sp., NIVA-CHL 15）和绿球藻（chlorococum sp., NIVA-CHL 103）。收获生物量并评估类胡萝卜素、脂肪酸和氨基酸的含量。1%的马铃薯汁培养基支持的生长速度和生物量产量与商业藻类培养基相当，收获的生物量具有相似的生化特征。这些结果表明，微藻生物技术可以用于马铃薯淀粉生产中未开发的侧流，为这一农工过程增加循环价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Algal Research-Biomass Biofuels and Bioproducts BIOTECHNOLOGY & APPLIED MICROBIOLOGY-

CiteScore

9.40

自引率

7.80%

发文量

332

期刊介绍： Algal Research is an international phycology journal covering all areas of emerging technologies in algae biology, biomass production, cultivation, harvesting, extraction, bioproducts, biorefinery, engineering, and econometrics. Algae is defined to include cyanobacteria, microalgae, and protists and symbionts of interest in biotechnology. The journal publishes original research and reviews for the following scope: algal biology, including but not exclusive to: phylogeny, biodiversity, molecular traits, metabolic regulation, and genetic engineering, algal cultivation, e.g. phototrophic systems, heterotrophic systems, and mixotrophic systems, algal harvesting and extraction systems, biotechnology to convert algal biomass and components into biofuels and bioproducts, e.g., nutraceuticals, pharmaceuticals, animal feed, plastics, etc. algal products and their economic assessment