Gallagher Joe A, Turner Lesley B, Adams Jessica M M, Barrento Sara, Dyer Philip W, Theodorou Michael K
1Biorefining Group, Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Gogerddan, Aberystwyth, Ceredigion SY23 3EE UK.
2Centre for Sustainable Aquatic Research (CSAR), Swansea University, Singleton Park, Swansea, SA2 8PP UK.
J Appl Phycol. 2018;30(4):2305-2316. doi: 10.1007/s10811-018-1420-7. Epub 2018 Feb 20.
Seaweeds can be a valuable resource for biorefinery and biotechnology applications, but their high water content is a recurrent problem and one of the key bottlenecks for their sustainable use. Treatments to increase dry matter content of the kelp were recently described by the authors. However macroalgae are an extremely diverse group of organisms and compositional variation between species may influence the effects of particular treatments. In this study, potential dewatering treatments including drying, osmotic media, and the application of both organic and mineral acids all followed by screw-pressing have been tested on two other species of kelp ( and ) and a red seaweed (). Conditions that dewatered these species were identified and the data have been combined with the previous results for . There were significant differences between species across all the traits of interest. However dewatering was highly dependent on specific interactions with both treatment and season of collection. Nevertheless, the dry matter content of brown seaweeds was widely and successfully increased by air drying or acid treatment followed by screw-pressing. The results for were quite different, particularly with regard to juice production. For this species, acid treatment did not result in dewatering, but dry matter content could be increased by screw-pressing immediately after harvest. Together the data presented here demonstrate that dewatering pre-treatments need to be specific for the type of seaweed to be processed; important knowledge for the future use of this sustainable biomass resource.
海藻可以成为生物炼制和生物技术应用的宝贵资源，但其高含水量是一个反复出现的问题，也是其可持续利用的关键瓶颈之一。作者最近描述了提高海带干物质含量的处理方法。然而，大型藻类是一类极其多样的生物，物种间的成分差异可能会影响特定处理的效果。在本研究中，对另外两种海带（ 和 ）以及一种红藻（ ）进行了包括干燥、渗透介质以及使用有机和无机酸后再进行螺旋压榨在内的潜在脱水处理测试。确定了使这些物种脱水的条件，并将数据与之前关于 的结果相结合。在所有感兴趣的性状上，物种间存在显著差异。然而，脱水高度依赖于与处理方式和采集季节的特定相互作用。尽管如此，通过空气干燥或酸处理后再进行螺旋压榨，褐藻的干物质含量得到了广泛且成功的提高。 的结果则大不相同，尤其是在汁液产量方面。对于该物种，酸处理并未导致脱水，但收获后立即进行螺旋压榨可提高干物质含量。本文呈现的数据共同表明，脱水预处理需要针对待处理的海藻类型进行特定设置；这对于未来利用这种可持续生物质资源具有重要意义。
