Evaluation of the Simultaneous Production of Xylitol and Ethanol from Sisal Fiber

Abstract

Recent years have seen an increase in the use of lignocellulosic materials in the development of bioproducts. Because sisal fiber is a low cost raw material and is readily available, this work aimed to evaluate its hemicellulose fraction for the simultaneous production of xylitol and ethanol. The sisal fiber presented a higher hemicellulose content than other frequently-employed biomasses, such as sugarcane bagasse. A pretreatment with dilute acid and low temperatures was conducted in order to obtain the hemicellulose fraction. The highest xylose contents (0.132 g·g−1 of sisal fiber) were obtained at 120 °C with 2.5% (v/v) of sulfuric acid. The yeast Candida tropicalis CCT 1516 was used in the fermentation. In the sisal fiber hemicellulose hydrolysate, the maximum production of xylitol (0.32 g·g−1) and of ethanol (0.27 g·g−1) was achieved in 60 h. Thus, sisal fiber presents as a potential biomass for the production of ethanol and xylitol, creating value with the use of hemicellulosic liquor without detoxification and without the additional steps of alkaline pretreatment.

Toward sustainable processes of pretreatment technologies of lignocellulosic biomass for enzymatic production of biofuels and chemicals: A review

“…Dilute sulfuric acid is the most commonly used acid for the pretreatment of various biomass feedstocks. Among acidic solutions, H2SO4 is the preferred option for acidic pretreatment (Santos et al 2018;Shimizu et al 2018;Xavier et al 2018). Despite the efficiency of diluted acid, there remains a concern about the formation of inhibitors (Jędrzejczyk et al 2019), such as hydroxymethylofurfural (HMF), furfural, and acetic acid.…”

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“…Earlier it was thought that after pretreatment, LCR has to be detoxified before fermentation but some of the recent work suggested that pretreated hydrolysate can be used without detoxification. Among different LCRs, sisal fibers having higher availability as low cost raw material have been evaluated for simultaneous production of xylitol and [32]. Rapeseed straw hemicellulosic hydrolysate was also evaluated for xylitol production by Debaryomyces hansenii and Candida guilliermondii, using different hydrolysate detoxification strategies.…”

Sustainable Reinforcement: Exploring Hypo Sludge and Sisal Fiber Integration in M25 Grade Concrete for Eco-Friendly Solutions and Assessing Environmental Impact

“…This study addresses these concerns by exploring the integration of innovative materials, namely Hypo sludge and novel sisal fiber, into M25 grade concrete. The novelty lies in the synergistic effect of these materials on mechanical strength and durability, offering an ecofriendly and sustainable alternative to conventional concrete (Damião(Damião Xavier et al 2018).…”