Porter School of Environment and Earth Sciences, Tel Aviv University, Tel Aviv, Israel; School of Mechanical Engineering, Tel Aviv University, Tel Aviv, Israel.
Agricultural Economics and Rural Policy Group, Wageningen University, Wageningen, the Netherlands.
Bioresour Technol. 2020 Dec;318:124263. doi: 10.1016/j.biortech.2020.124263. Epub 2020 Oct 16.
In the fermentation and bioenergy industry, terrestrial biomass is usually fractionated and the collected components, such as starch, are processed separately. Such a separation has not been reported for seaweeds. In this work, the direct hydrothermal processing of the whole green seaweed Ulva sp. biomass is compared to processing of separated starch and cellulose, to find the preferable route for monosaccharide, hydrochar, and polyhydroxyalkanoates (PHA) production. Glucose was the major released monosaccharide. A significant share of the glucose yield comes from the starch fraction. The highest hydrochar yield with the lowest ash content was obtained from the separated cellulose fraction. The highest PHA yield was obtained using a whole Ulva sp. hydrolysate fermentation with Haloferaxmediterranei. Economic analysis shows the advantage of direct Ulva sp. biomass fermentation to PHA. The co-production of glucose and hydrochar does not add significant economic benefits to the process under plausible prices of the two outputs.
在发酵和生物能源产业中，陆生生物质通常被分离，收集的成分，如淀粉，分别进行处理。海藻的这种分离尚未有报道。在这项工作中，将整个绿色海藻石莼的直接水热加工与分离的淀粉和纤维素的加工进行了比较，以找到生产单糖、水炭和聚羟基烷酸酯 (PHA) 的更优途径。葡萄糖是主要释放的单糖。葡萄糖产量的很大一部分来自淀粉部分。从分离的纤维素部分获得了产率最高、灰分含量最低的水炭。使用地中海盐杆菌发酵整个石莼的水解物获得了最高的 PHA 产量。经济分析表明，直接发酵石莼生产 PHA 具有优势。在两种产物的合理价格下，葡萄糖和水炭的联产并没有给该工艺带来显著的经济效益。
