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Investigation of an alternative cell disruption approach for improving hydrothermal liquefaction of microalgae

机译:改善微藻水热液化的替代细胞破坏方法的研究

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High-energy and cost-intensive cell disruption processes represent one of the major techno-economic bottlenecks in the microalgae-based bio-refineries. Therefore, a feasible disruption method is required to ensure low energy input and operating cost, as well as high target-product (e.g., lipid) recovery. In this study, several different pre-treatment strategies for the disruption of Chlorella vulgaris were investigated, including NaOH/urea, sulfuric acid and ultra-sonication. Experimental results showed that the pretreatment by NaOH/urea solution resulted in an average mass loss of 33.7 wt.%, and resulted in the removal of 77.2% of carbohydrates and 46.3% of protein (as N) from the original biomass. While these results were comparable to those obtained from the other cell disruption methods, the NaOH/urea method is believed to be more advantageous in terms of energy-efficiency and cost. Afterwards, all pre-treated microalgae samples were subjected to the liquefaction process towards bio-crude oil production. The bio-crude oils obtained from NaOH/urea solvent pre-treated microalgae resulted in higher yields and demonstrated better flow properties. (C) 2017 Elsevier Ltd. All rights reserved.
机译:高能量和成本密集的细胞破坏过程是基于微藻的生物精炼厂的主要技术经济瓶颈之一。因此,需要可行的破坏方法以确保低的能量输入和操作成本,以及高的目标产物(例如脂质)回收。在这项研究中,研究了几种破坏寻常小球藻的预处理策略,包括NaOH /尿素,硫酸和超声处理。实验结果表明,用NaOH /尿素溶液进行预处理导致平均质量损失33.7 wt。%,并从原始生物质中去除了77.2%的碳水化合物和46.3%的蛋白质(以N计)。尽管这些结果可与其他细胞破碎方法获得的结果相媲美,但据信NaOH /脲方法在能源效率和成本方面更具优势。之后,将所有经过预处理的微藻样品进行液化处理,以生产生物原油。从NaOH /脲溶剂预处理的微藻获得的生物粗制油可提高产量,并表现出更好的流动性。 (C)2017 Elsevier Ltd.保留所有权利。

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