Xylitol production from brewer’s spent grain via Pichia fermentans fermentation: optimization, scaling, and isolation

Date published

2025-03-06

Free to read from

2025-03-20

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Publisher

Wiley

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Article

ISSN

0145-8892

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Citation

Mathur S, Kumar D, Kumar V, et al., (2025) Xylitol production from brewer’s spent grain via Pichia fermentans fermentation: optimization, scaling, and isolation. Journal of Food Processing and Preservation, Volume 2025, Article number 9721088

Abstract

The primary aim of this study was to investigate the novel application of brewer’s spent grain (BSG), a waste byproduct from the brewing industry, as sustainable and cost‐effective feedstock for xylitol production using the yeast Pichia fermentans. The process encompassed fermentation optimization, scale‐up, and then downstream processing to produce xylitol. Shake flask fermentation was employed to determine optimal conditions, evaluating key parameters including inoculum concentration (12.5%), feedstock (50%), pH (7.0), temperature (30°C), incubation time (96 h), and agitation speed (150 RPM) with a maximum xylitol production of 32.74 g/L. The yield of xylitol increased to 34.57 g/L by scaling up in an 8‐L bioreactor within an incubation time of 72 h. Downstream processing, including centrifugation, charcoal treatment, and ethanol purification was performed successfully, recovering xylitol crystals with a purity of 85.90%. Characterization using X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and high‐performance liquid chromatography (HPLC) confirmed the purity and composition of crystals. This research highlights the economic and environmental advantages of utilizing BSG for xylitol production, offering a sustainable route over conventional substrates.

Description

Software Description

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Github

Keywords

brewer's spent grain (BSG), downstream processing, fermentation, Pichia fermentans, valorization, xylitol, 4004 Chemical Engineering, 30 Agricultural, Veterinary and Food Sciences, 40 Engineering, 3006 Food Sciences, Food Science, 3006 Food sciences, 4004 Chemical engineering

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Attribution 4.0 International

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