利用深共晶溶剂对微藻生物质进行预处理以提高生物柴油生产中脂质回收的新方法。
A new approach of microalgal biomass pretreatment using deep eutectic solvents for enhanced lipid recovery for biodiesel production.
机构信息
School of Chemistry and Environmental Engineering, Shaoguan University, Shaoguan 512005, China; Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China.
出版信息
Bioresour Technol. 2016 Oct;218:123-8. doi: 10.1016/j.biortech.2016.05.120. Epub 2016 Jun 1.
The biomass of Chlorella sp. was pretreated with three different aqueous deep eutectic solvents (aDESs), i.e. aqueous choline chloride-oxalic acid (aCh-O), aqueous choline chloride-ethylene glycol (aCh-EG) and aqueous urea-acetamide (aU-A). The effect of aDESs pretreatment of microalgae biomass was evaluated in terms of lipid recovery rate, total carbohydrate content, fatty acid composition, and thermal chemical behavior of biomass. Results indicated that, lipid recovery rate was increased from 52.03% of untreated biomass to 80.90%, 66.92%, and 75.26% of the biomass treated by aCh-O, aCh-EG and aU-A, respectively. However, there were no major changes observed in fatty acid profiles of both untreated and treated biomass, specifically palmitic acid, palmitoleic acid and stearic acid under various pretreatments. Furthermore, characterizations of untreated and treated biomass were carried out using Fourier transform infrared (FTIR), thermogravimetry analysis (TGA) and scanning electron microscope (SEM) to understand the enhanced lipids recovery.
用三种不同的水基深共熔溶剂（aDESs），即水合氯化胆碱-草酸（aCh-O）、水合氯化胆碱-乙二醇（aCh-EG）和水合尿素-乙酰胺（aU-A）预处理小球藻生物质。根据脂质回收率、总碳水化合物含量、脂肪酸组成和生物质的热化学行为来评估 aDESs 预处理对微藻生物质的影响。结果表明，未经处理的生物质的脂质回收率从 52.03%增加到 aCh-O、aCh-EG 和 aU-A 处理后的生物质的 80.90%、66.92%和 75.26%。然而，在各种预处理条件下，未处理和处理的生物质的脂肪酸谱都没有明显变化，特别是棕榈酸、棕榈油酸和硬脂酸。此外，使用傅里叶变换红外（FTIR）、热重分析（TGA）和扫描电子显微镜（SEM）对未处理和处理的生物质进行了表征，以了解增强的脂质回收。
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