Techno-economic analysis of producing antioxidant peptides from whole sorghum stillage

IF 3.5 2区农林科学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Food and Bioproducts Processing Pub Date : 2025-01-04 DOI:10.1016/j.fbp.2025.01.004

Xuanbo Liu , Yonghui Li , Yixiang Xu , Haibo Huang

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引用次数: 0

Abstract

Grain sorghum presents a viable biomass option for ethanol production, offering a means to address the pressing issue of global warming stemming from fossil fuel usage. However, post-sorghum bioethanol production generates a substantial volume of fresh sorghum stillage as waste, which poses significant handling and disposal challenges. This stillage, rich in protein content, holds promise as a source for producing antioxidant peptides. The aim of this study was to evaluate the economic feasibility of converting whole sorghum stillage into antioxidant peptides through enzymatic hydrolysis. The process design entails enzymatic hydrolysis, followed by separation and drying processes to yield both an antioxidant peptide product and a high-fiber co-product. Three distinct scenarios were examined, and each considered different protease sources and enzymatic hydrolysis conditions: Neutrase, Alcalase, and Flavourzyme, respectively. It is assumed that the processing facility is adjacent to a sorghum bioethanol plant, generating 93.7 metric tons (MT) of fresh sorghum stillage per hour. Total capital investments (TCI) were estimated at 60.8 M USD, 60.9 M USD, and 59.4 M USD for scenarios 1, 2, and 3, respectively. The minimum selling price of antioxidant peptides (MSPP) was determined to be 1048 USD/MT, 1098 USD/MT, and 2578 USD/MT for scenarios 1 through 3, respectively. These values indicate the economic viability of the processing compared to market prices of protein and artificial antioxidant products. Furthermore, an economic sensitivity analysis was conducted to identify critical parameters influencing the economic performance of the process. It was found that implementing advancements in processing parameters and reductions in economic variables could significantly decrease the minimum selling price to 762 USD/MT. This study furnishes essential economic metrics for antioxidant peptide production from whole sorghum stillage, offering valuable insights applicable to the treatment of other grain stillage or protein-rich agricultural waste.

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来源期刊

Food and Bioproducts Processing 工程技术-工程：化工

CiteScore

9.70

自引率

4.30%

发文量

115

审稿时长

24 days

期刊介绍： Official Journal of the European Federation of Chemical Engineering: Part C FBP aims to be the principal international journal for publication of high quality, original papers in the branches of engineering and science dedicated to the safe processing of biological products. It is the only journal to exploit the synergy between biotechnology, bioprocessing and food engineering. Papers showing how research results can be used in engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in equipment or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of food and bioproducts processing. The journal has a strong emphasis on the interface between engineering and food or bioproducts. Papers that are not likely to be published are those: • Primarily concerned with food formulation • That use experimental design techniques to obtain response surfaces but gain little insight from them • That are empirical and ignore established mechanistic models, e.g., empirical drying curves • That are primarily concerned about sensory evaluation and colour • Concern the extraction, encapsulation and/or antioxidant activity of a specific biological material without providing insight that could be applied to a similar but different material, • Containing only chemical analyses of biological materials.