Biotechnological Approaches for Food Waste Valorization

A special issue of Fermentation (ISSN 2311-5637). This special issue belongs to the section "Industrial Fermentation".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 3329

Special Issue Editor

Special Issue Information

Dear Colleagues,

Food waste, produced throughout the entire food supply chain, contains valuable bioactive compounds. Due to its composition, food waste represents a suitable feedstock for biorefineries for obtaining value-added products while minimizing environmental problems and helping the economy and society. Currently, biotechnological approaches are implemented as novel and green applications for food waste valorization and for improving their stability and applicability. 

The aim of this Special Issue is to consider original studies on food waste reutilization techniques, mainly based on fermentation processes, such as submerged fermentation, solid state fermentation, and immobilized cell fermentation, for enhancing biofuel production and obtaining bioactive compounds, bioplastics, biopolymers, biofertilizers, enzymes, organic acids, or single-cell proteins. Moreover, research on valorization methods for consumable food waste for functional food production will be also considered.

Dr. Alessia Tropea
Guest Editor

Manuscript Submission Information

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Published Papers (3 papers)

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Research

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18 pages, 2048 KiB  
Article
Acidogenic Fermentation of Food Waste for the Production of Short-Chain Fatty Acids: The Impact of Inoculum Type and Inoculum Heat Pretreatment
by Sharli Jodhani, Joseph Sebastian, Jangho Lee, Kaushik Venkiteshwaran, Hyung-Sool Lee, Virender Singh, Banu Ormeci and Abid Hussain
Fermentation 2024, 10(3), 162; https://doi.org/10.3390/fermentation10030162 - 12 Mar 2024
Viewed by 950
Abstract
Acidogenic fermentation is an emerging biotechnology that allows for the utilization of food waste as a feedstock to produce high-value products such as short-chain fatty acids (SCFAs), effectively offering a tangible solution for food waste management as well as resource recovery. The objectives [...] Read more.
Acidogenic fermentation is an emerging biotechnology that allows for the utilization of food waste as a feedstock to produce high-value products such as short-chain fatty acids (SCFAs), effectively offering a tangible solution for food waste management as well as resource recovery. The objectives of the current study were to identify the ideal inoculum, waste-activated sludge (WAS) or anaerobic digester sludge (AD), for the acidogenic fermentation of food waste at room temperature, as well as to evaluate the impact of heat pretreatment of these inoculums on fermentation performance. The maximum hydrolysis yield of 399 g sCOD/kg VS added was obtained when untreated AD was used as the inoculum, whereas the pretreated AD inoculum provided the highest SCFA yield and conversion efficiency of 238 g sCODSCFA/kg VS added and 71%, respectively. Heat pretreatment had a detrimental impact on the WAS inoculum, leading to lower hydrolysis and SCFA yields, but exerted a positive influence on the AD inoculum. The microbial community showed that heat pretreatment negatively impacted the abundance of non-spore-forming hydrolytic and acidogenic microorganisms. Overall, this study demonstrates the critical role of inoculum type and heat pretreatment in optimizing the acidogenic fermentation process, laying the groundwork for future refinements in SCFA production from food waste through inoculum design. Full article
(This article belongs to the Special Issue Biotechnological Approaches for Food Waste Valorization)
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Review

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34 pages, 3450 KiB  
Review
Revolutionizing Renewable Resources: Cutting-Edge Trends and Future Prospects in the Valorization of Oligosaccharides
by Ramachandran Chelliah, Nam Hyeon Kim, SeonJu Park, Younseo Park, Su-Jung Yeon, Kaliyan Barathikannan, Selvakumar Vijayalakshmi and Deog-Hwan Oh
Fermentation 2024, 10(4), 195; https://doi.org/10.3390/fermentation10040195 - 02 Apr 2024
Viewed by 634
Abstract
Lignocellulosic wastes, primarily from agricultural by-products, are a renewable resource increasingly used in the sustainable production of oligosaccharides, significantly contributing to the growing bioeconomy. This innovative utilization of biological resources aligns with the global shift towards sustainable development, focusing on creating products such [...] Read more.
Lignocellulosic wastes, primarily from agricultural by-products, are a renewable resource increasingly used in the sustainable production of oligosaccharides, significantly contributing to the growing bioeconomy. This innovative utilization of biological resources aligns with the global shift towards sustainable development, focusing on creating products such as food, feed, and bioenergy from renewable sources. Oligosaccharides, specialized carbohydrates, are synthesized either chemically or more eco-friendly, biologically. Biological synthesis often involves enzymes or whole-cell systems to transform lignocellulosic wastes into these valuable sugars. As functional food supplements, oligosaccharides play a crucial role in human and animal health. They serve as prebiotics, indigestible components that promote the proliferation of beneficial gut microbiota, especially within the colon. This positive impact on gut flora is essential for boosting the immune system and regulating physiological functions. Important prebiotics, including galactooligosaccharides (GOS), xylooligosaccharides (XOS), fructooligosaccharides (FOS), mannan-oligosaccharides (MOS), and isomaltooligosaccharides (IMOS), are produced through methods involving enzymes or the use of whole cells, with agricultural waste as substrates. Recent advancements focus on refining these biological processes for oligosaccharide synthesis using lignocellulosic substrates, emphasizing the principles of a circular bioeconomy, which promotes resource reuse and recycling. This review highlights the potential and challenges in the biological synthesis of oligosaccharides from renewable resources. It underscores the need for innovation in process optimization and commercialization strategies to fully exploit lignocellulosic wastes. This approach not only contributes to sustainable product development, but also opens new avenues for the profitable and environmentally friendly utilization of agricultural residues, marking a significant step forward in the bio-based industry. Full article
(This article belongs to the Special Issue Biotechnological Approaches for Food Waste Valorization)
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15 pages, 3384 KiB  
Review
Bio-Driven Sustainable Extraction and AI-Optimized Recovery of Functional Compounds from Plant Waste: A Comprehensive Review
by Wiem Alloun and Cinzia Calvio
Fermentation 2024, 10(3), 126; https://doi.org/10.3390/fermentation10030126 - 23 Feb 2024
Viewed by 1104
Abstract
The agrifood industry produces copious amounts of waste, which represent an execrable wastage of natural resources and result in economic losses over the entire value chain. This review compares conventional and biological methods for the recovery of functional compounds from plant wastes to [...] Read more.
The agrifood industry produces copious amounts of waste, which represent an execrable wastage of natural resources and result in economic losses over the entire value chain. This review compares conventional and biological methods for the recovery of functional compounds from plant wastes to rescues part of the intrinsic valuable elements contained therein. Biological methods involve bioprocesses based on hydrolytic enzymes and engineered bacterial strains, to facilitate the release of valuable compounds. Then, this review explores the innovative and transformative role of artificial intelligence and machine learning techniques for real-time monitoring, optimizing, and digitizing the extraction procedures. By combining the potential of biological extraction and AI integration, this review provides insights on how these approaches can revolutionize the agrifood sector, increasing the efficiency and environmental sustainability of the plant waste valorization process. Full article
(This article belongs to the Special Issue Biotechnological Approaches for Food Waste Valorization)
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