Porter School of Environmental Studies, Tel Aviv University, Israel.
Institute for Pulsed Power and Microwave Technology, Karlsruhe Institute of Technology, Karlsruhe, Germany.
Bioresour Technol. 2018 May;255:131-139. doi: 10.1016/j.biortech.2018.01.089. Epub 2018 Feb 4.
Among all biomass constituents, the ashes are major hurdles for biomass processing. Ashes currently have low market value and can make a non-negligible fraction of the biomass dry weight significantly impacting its further processing by degrading equipment, lowering process yield, inhibiting reactions and decreasing products qualities. However, most of the current treatments for deashing biomass are of poor efficiency or industrial relevance. This work is the first report on the use of Pulsed Electric Field (PEF) to enhance deashing of biomass from a high ash content green marine macroalga, Ulva sp., using hydraulic pressing. By inducing cell permeabilization of the fresh biomass, PEF was able to enhance the ash extraction from 18.4% (non-treated control) to 37.4% of the total ash content in average, significantly enhancing the extraction of five of the major ash elements (K, Mg, Na, P and S) compared to pressing alone.
在所有生物质成分中，灰分是生物质加工的主要障碍。目前，灰分的市场价值较低，而且其占生物质干重的比例相当可观，这显著影响了其后续加工，因为灰分会损坏设备、降低工艺收率、抑制反应并降低产品质量。然而，目前大多数用于脱除生物质灰分的处理方法效率低下或与工业相关性差。这项工作首次报道了使用脉冲电场 (PEF) 来增强从高灰分绿色海洋大型海藻 Ula 属中提取生物质灰分，方法是采用液压压榨。通过诱导新鲜生物质的细胞通透性，PEF 能够将灰分的提取率从未经处理的对照样品的 18.4%提高到平均总灰分的 37.4%，与单独压榨相比，显著提高了五种主要灰分元素（K、Mg、Na、P 和 S）的提取率。
