Valorization of macroalga Saccharina latissima as novel feedstock for fermentation-based succinic acid production in a biorefinery approach and economic aspects
Valorization of macroalga Saccharina latissima as novel feedstock for fermentation-based succinic acid production in a biorefinery approach and economic aspects
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DOI：
10.1016/j.algal.2016.02.023
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发表时间：
2016-06
影响因子：
5.1
通讯作者：
G. Marinho;M. Alvarado-Morales;I. Angelidaki
中科院分区：
文献类型：
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作者：
G. Marinho;M. Alvarado-Morales;I. Angelidaki
本研究旨在评估大型藻类 Saccharina latissima 作为生物精炼方法中基于发酵的琥珀酸生产原料的潜力。碳水化合物和可发酵糖含量的季节变化对琥珀酸的产量和滴度有显着影响。当使用经过两个生长季节培养并于 7 月和 8 月收获的大型藻类生物质混合物作为原料时，琥珀酸的最大产量为 91.9%（g g−1 总糖），相当于理论最大产量的 70.5%。琥珀酸滴度为 36.8 g L−1，最大生产率为 3.9 g L−1h−1。大型藻类生物质中总酚化合物 (TPC) 含量高（7 月至 8 月：5-1% DM），酶解（PHSR）后回收的固体残渣中常量营养素（Ca、K、Na、Mg、P、N 和 Fe）和微量营养素浓度高，使得联产抗氧化剂（即酚类）和肥料非常有吸引力。最后，简化的经济评估表明，在分析的情景中，通过联产附加值产品（肥料）和高附加值小批量产品（抗氧化剂），可以显着降低主要产品（琥珀酸）的销售价格。
This study aimed to evaluate the potential of the macroalgaSaccharina latissimaas feedstock for fermentation-based succinic acid production in a biorefinery approach. Seasonal variations in the content of carbohydrates, and fermentable sugars, had a significant impact on the succinic acid yield and titer. A maximum succinic acid yield of 91.9% (g g− 1of total sugars) corresponding to 70.5% of the theoretical maximum yield was achieved when a blend of macroalgal biomass cultivated over two growing seasons and harvested in July and August was used as feedstock. A succinic acid titer of 36.8 g L− 1with a maximum productivity of 3.9 g L− 1h− 1was achieved. The high content of total phenolic compounds (TPCs) in the macroalgal biomass (July–August: 5–1% DM), and high concentration of macro- (Ca, K, Na, Mg, P, N and Fe) and micronutrients in the solid residue recovered after enzymatic hydrolysis (PHSR), makes co-production of antioxidants (i.e. phenolics) and fertilizer very attractive. Finally, a simplified economic assessment showed that for the analyzed scenarios the main product's selling price (succinic acid) can be lowered significantly by coproducing added value products (fertilizers) and high added value-lower volume products (antioxidants).