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首页> 外文期刊>The Science of the Total Environment >Co-production of biodiesel and alginate from Laminaria japonica
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Co-production of biodiesel and alginate from Laminaria japonica

机译：粳稻生物柴油和藻酸盐的共同生产

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摘要

A process to produce both biodiesel and alginate in an integrated manner from a brown seaweed, Laminuria japonica, was established. Mannitol, a major carbon constituent in L. japonica, served to produce neutral lipids via the heterotrophic cultivation of an oleaginous yeast, Cryptococcus sp.; and simultaneously alginate, a high value product, was extracted to enhance the economic feasibility of the entire process. Only autoclave pretreatment, without need of any chemical agents, was enough to recover all the essential nutrients for the yeast cultivation. Specifically, it could recover 6.4 g L-1 of mannitol to a degree comparable to 6.6 g L-1 obtained by acid-aided pretreatment using 1.500 (v/v) of H2SO4. Maximum fatty acids methyl esters (FAME) content was 30.37% with FAME productivity of 0.56 g L-1 d(-1), and the produced FAME could meet the biodiesel quality standards. Na2CO3-based method showed the best efficiency of alginate recovery, yielding 21.06% (w/w). This study supports that L japonica can indeed be a promising low-cost feedstock for biodiesel production, and it is more so when a high-value product alginate is co-produced. (C) 2019 Elsevier B.V. All rights reserved.
机译：建立了从棕色海藻，Laminuria japonica生产生物柴油和藻酸盐的过程。甘露醇，L. japonica的主要碳成分，服务于通过无植物酵母的异养培养产生中性脂质，Cryptococcus sp。并同时藻酸盐，提取高价值产品，以提高整个过程的经济可行性。只有高压釜预处理，无需任何化学剂，足以回收酵母培养的所有必需营养素。具体地，它可以将6.4g L-1的甘露醇恢复至可比于6.6g L-1的程度，其使用1.500（v / v）H 2 SO 4获得的酸辅助预处理。最大脂肪酸甲酯（名称）含量为30.37％，增义生产率为0.56g L-1 d（-1），所生产的名称可以满足生物柴油质量标准。基于Na2CO3的方法显示出藻酸盐恢复的最佳效率，产生21.06％（w / w）。这项研究支持L粳奈确实可以成为生物柴油生产的有希望的低成本原料，并且在共同生产高价值产品海藻酸盐时，更为稳定。 （c）2019 Elsevier B.v.保留所有权利。

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