Pretreatment of microalgal biomass to improve the enzymatic hydrolysis of carbohydrates by ultrasonication: Yield vs energy consumption
Pretreatment of microalgal biomass to improve the enzymatic hydrolysis of carbohydrates by ultrasonication: Yield vs energy consumption
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DOI：
10.1016/j.jksus.2018.09.007
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发表时间：
2020-01-01
影响因子：
3.8
通讯作者：
Bertucco, Alberto
中科院分区：
文献类型：
--
作者：
de Farias Silva, Carlos Eduardo;Meneghello, Davide;Bertucco, Alberto
在被称为第三代生物燃料的发酵/反应过程中，微藻生物质被认为是一种可能的碳水化合物和脂肪的替代来源。来自微藻的碳水化合物主要由葡萄糖和一些戊糖衍生的聚合物组成，必须经过水解才能有效利用。当应用酶解时，需要进行前处理。超声/超声是最有发展前景的方法之一，本文验证了超声处理时间、超声强度和生物质浓度对处理效果的影响，并对处理过程中的能耗进行了比较。超声波强度是影响酶可及性的主要因素。可以通过延长前处理时间来缩短水解液的时间。当采用较高的声幅(超声强度)和处理时间时，水解率可达90%以上。外加能量间接影响了水解液的降解过程。当采用50%的变幅处理25min时，糖化/能量比最好，水解率为91%，干生物质消耗为2.4MJ/kg。爱思唯尔公司代表沙特国王大学制作和主办。
Microalgal biomass has been considered as a possible alternative source of carbohydrates and lipids in fermentative/reactional processes, called third generation of biofuels. Carbohydrates from microalgae are mostly composed by glucose and some pentose-derived polymers that must be hydrolyzed to be efficiently used. When enzymatic hydrolysis is applied a pretreatment is required. Sonication/ultrasonication is one of the most promising methods, and in this paper the influence of pretreatment time, sonication intensity and biomass concentration was validated, and the energy consumed in the process compared as well. Sonication intensity had the major role on the enzymatic accessibility. Pretreatment time can be used to decrease hydrolysis time. More than 90% of hydrolysis efficiency was reached when higher amplitude (sonication intensity) and pretreatment time were used. The applied energy influenced indirectly the hydrolysis process. The best saccharification/energy relation was reached when 50% of amplitude for 25 min was applied, obtaining 91% of hydrolysis yield and spending 2.4 MJ/kg of dry biomass. Production and hosting by Elsevier B.V. on behalf of King Saud University.