PDF(Pubmed)
Abstract：
Seaweeds are considered a biomass for third-generation biofuel, and hydrothermal carbonization (HTC) is a valuable process for efficiently disposing of the excess of macroalgae biomass for conversion into multiple value-added products. However, the HTC process produces a liquid phase to be disposed of. The present study aims to investigate the effects of seed-priming treatment with three HTC-discarded liquid phases (namely AHL180, AHL240, and AHL300), obtained from different experimental procedures, on seed germination and plant growth and productivity of Phaseolus vulgaris L. To disentangle the osmotic effects from the use of AHL, isotonic solutions of polyethylene glycol (PEG) 6000 have also been tested. Seed germination was not affected by AHL seed-priming treatment. In contrast, PEG-treated samples showed significantly lower seed germination success. AHL-treated samples showed changes in plant biomass: higher shoot biomass was recorded especially in AHL180 samples. Conversely, AHL240 and AHL300 samples showed higher root biomass. The higher plant biomass values recorded in AHL-treated samples were the consequence of higher values of photosynthesis rate and water use efficiency, which, in turn, were related to higher stomatal density. Recorded data strongly support the hypothesis of the AHL solution reuse in agriculture in the framework of resource management and circular green economy.
摘要：
海藻被认为是第三代生物燃料的生物质，和水热碳化（HTC）是有效处理过量的大型藻类生物质以转化为多种增值产品的有价值的过程。然而,HTC工艺产生待处置的液相。本研究旨在研究使用三种HTC丢弃的液相（即AHL180，AHL240和AHL300）进行种子引发处理的效果，从不同的实验程序中获得，对菜豆种子萌发、植物生长和生产力的影响为了解开AHL使用的渗透效应，聚乙二醇(PEG)6000的等渗溶液也已经过测试。AHL种子引发处理不影响种子萌发。相比之下,PEG处理的样品显示出显著较低的种子萌发成功率。AHL处理的样品显示出植物生物量的变化：尤其是在AHL180样品中，记录了较高的芽生物量。相反，AHL240和AHL300样品显示出较高的根生物量。在AHL处理的样品中记录的较高的植物生物量值是光合作用速率和水分利用效率值较高的结果，which,反过来,与较高的气孔密度有关。记录的数据有力地支持了在资源管理和循环绿色经济框架下农业中AHL解决方案重用的假设。
