Abstract

There is growing interest in attached algae cultivation systems because they could provide a more cost- and energy-efficient alternative to planktonic (suspended algae) cultivation systems for many applications. However, attached growth systems have been far less studied than planktonic systems and have largely emphasized algae strains of most interest for biofuels. New algal biorefinery pathways have assessed the commercial potentials of algal biomass beyond biofuel production and placed more emphasis on value-added products from that biomass. Therefore, algal strain selection criteria and biomass cultivation methods need to be updated to include additional strains for improved efficiency. One possible way of improving attached cultivation systems is through engineering substrate surface characteristics to boost algal adhesion and enable strain selective algal colonization and growth. This review explores the effect of substrate chemical and topographical characteristics on the cultivation of attached algae. It also highlights the importance of considering algal community structure and attachment mechanisms in investigating attached algae systems using the example of filamentous algae found in algal turf scrubber (ATS™) systems.

Key points

• Attached algal cultivation is a promising alternative to planktonic cultivation.

• Performance increase results from tuning surface qualities of attachment substrates.

• Attachment adaptation of periphytic algae has innate potential for cultivation.

中文翻译：

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基质特性作为附着藻培养中的控制参数

摘要

人们对附着藻类培养系统越来越感兴趣，因为它们可以为许多应用提供比浮游（悬浮藻类）培养系统更经济，更节能的替代方法。但是，与浮游生物系统相比，对附着生长系统的研究远远不够，并且已重点强调了对生物燃料最感兴趣的藻类。新的藻类生物精炼途径已经评估了藻类生物质在生物燃料生产之外的商业潜力，并更加重视该生物质的增值产品。因此，藻类菌株选择标准和生物量培养方法需要更新，以包括其他菌株以提高效率。改善附着培养系统的一种可能方法是通过工程化基质表面特性来增强藻类的附着力，并使菌株能够选择性地进行藻类定居和生长。这篇综述探讨了底物化学和地形特征对附着藻类培养的影响。它还强调了以藻类草坪洗涤器（ATS™）系统中发现的丝状藻类为例，在研究附着藻类系统时考虑藻类群落结构和附着机制的重要性。

关键点

•藻类附着养殖是浮游养殖的有前途的替代方法。

•性能提高是由于调整了附着基板的表面质量而导致的。

•附生藻类的附着适应具有先天的栽培潜力。