Exploring different processes for starch extraction from microalgae and synthesis of starch-chitosan plastic films.

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING Bioresource Technology Pub Date : 2024-09-21 DOI:10.1016/j.biortech.2024.131516

Fabrizio Di Caprio, Nooshin Pedram, Benedetta Brugnoli, Iolanda Francolini, Pietro Altimari, Francesca Pagnanelli

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Abstract

Microalgae could become a more sustainable starch source than conventional crops. However, available refinery processes are lacking. In this study, we develop different innovative processes to refine microalgal starch and obtaining starch-based bioplastics. After lipid extraction, defatted microalgae were treated by different routes: enzymatic treatment with Alcalase; sonication in hot water or dimethyl sulfoxide (DMSO) followed by precipitation with ethanol. Enzymes allows to extract 70 % of proteins while recovering 75 % of the initial starch in the residual pellet, with a purity of 58 %. The most effective configuration based on sonication and water/DMSO extraction allowed to recover up to 80 % starch with 80-91 % purity. Chitosan improved the mechanical properties of the obtained starch-based films. The use of defatted algae or purified starch gave different properties to the films (as rigidity and water stability) showing the possibility to tailor the material characteristics depending on the biorefinery route applied.

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探索从微藻中提取淀粉和合成淀粉壳聚糖塑料薄膜的不同工艺。

与传统作物相比，微藻可以成为一种更具可持续性的淀粉来源。然而，目前还缺乏可用的提炼工艺。在这项研究中，我们开发了不同的创新工艺来提炼微藻淀粉并获得以淀粉为基础的生物塑料。提取脂质后，脱脂微藻通过不同的途径进行处理：使用阿尔卡酶进行酶处理；在热水或二甲基亚砜（DMSO）中超声处理，然后用乙醇沉淀。酶法可提取 70% 的蛋白质，同时在残留颗粒中回收 75% 的初始淀粉，纯度为 58%。基于超声和水/二甲基亚砜萃取的最有效配置可回收高达 80% 的淀粉，纯度为 80-91%。壳聚糖改善了所得淀粉基薄膜的机械性能。使用脱脂藻类或纯化淀粉可使薄膜具有不同的特性（如刚性和水稳定性），这表明可根据所采用的生物炼制路线来定制材料特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.