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Functional Ingredients from Food Waste and By-Products: Processing Technologies, Functional...
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Functional Ingredients from Food Waste and By-Products: Processing Technologies, Functional Characteristics and Value-Added Applications

A special issue of Foods (ISSN 2304-8158). This special issue belongs to the section "Food Systems".

Deadline for manuscript submissions: 15 October 2024 | Viewed by 2999

Special Issue Editors

Dr. Lucía Seguí

E-Mail Website
Guest Editor
Instituto Universitario de Ingeniería de Alimentos–FoodUPV (Food Engineering Research Institute) of the Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
Interests: food engineering; food processing; food waste valorization; functional foods development; drying; fermentation; in vitro digestion
Special Issues, Collections and Topics in MDPI journals
Dr. Cristina Barrera Puigdollers

E-Mail Website
Guest Editor
Instituto Universitario de Ingeniería de Alimentos–FoodUPV (Food Engineering Research Institute) of the Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
Interests: food engineering; food processing; food waste valorization; functional foods development; drying; fermentation; in vitro digestion
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

To meet current food industry sustainability and resource efficiency needs, food waste and by-product management and valorization have become both a must and a challenge. Due to their high nutrient and bioactive compound contents, food waste and by-products hold immense potential to be transformed into valuable functional ingredients, which may have applications in the food industry and related areas. This Special Issue aims to explore traditional and innovative processing technologies that can be applied to obtain functional ingredients from these underutilized resources. We are also keen to advance general knowledge about the nutritional and technological characteristics of these ingredients and explore their wide-ranging applications across various sectors, from food and beverages to agriculture, packaging and beyond.

By participating in this Special Issue, authors can contribute to shaping the future of sustainable food production while offering solutions to producers. Submit your original articles and reviews to be part of this exciting journey.

Sincerely,

Dr. Lucía Seguí
Dr. Cristina Barrera Puigdollers
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Foods is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

 

Keywords

  • food waste valorization
  • innovative and traditional processing technologies
  • value-added applications
  • nutritional characterization
  • technological characterization

Published Papers (4 papers)

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Research

19 pages, 10626 KiB  
Article
Ultrasonic-Assisted Extraction of Dictyophora rubrovolvata Volva Proteins: Process Optimization, Structural Characterization, Intermolecular Forces, and Functional Properties
by Yongqing Zhang, Shinan Wei, Qinqin Xiong, Lingshuai Meng, Ying Li, Yonghui Ge, Ming Guo, Heng Luo and Dong Lin
Foods 2024, 13(8), 1265; https://doi.org/10.3390/foods13081265 - 20 Apr 2024
Viewed by 409
Abstract
Dictyophora rubrovolvata volva, an agricultural by-product, is often directly discarded resulting in environmental pollution and waste of the proteins’ resources. In this study, D. rubrovolvata volva proteins (DRVPs) were recovered using the ultrasound-assisted extraction (UAE) method. Based on one-way tests, orthogonal tests were conducted [...] Read more.
Dictyophora rubrovolvata volva, an agricultural by-product, is often directly discarded resulting in environmental pollution and waste of the proteins’ resources. In this study, D. rubrovolvata volva proteins (DRVPs) were recovered using the ultrasound-assisted extraction (UAE) method. Based on one-way tests, orthogonal tests were conducted to identify the effects of the material–liquid ratio, pH, extraction time, and ultrasonic power on the extraction rate of DRVPs. Moreover, the impact of UAE on the physicochemical properties, structure characteristics, intermolecular forces, and functional attributes of DRVPs were also examined. The maximum protein extraction rate was achieved at 43.34% under the best extraction conditions of UAE (1:20 g/mL, pH 11, 25 min, and 550 W). UAE significantly altered proteins’ morphology and molecular size compared to the conventional alkaline method. Furthermore, while UAE did not affect the primary structure, it dramatically changed the secondary and tertiary structure of DRVPs. Approximately 13.42% of the compact secondary structures (α-helices and β-sheets) underwent a transition to looser structures (β-turns and random coils), resulting in the exposure of hydrophobic groups previously concealed within the molecule’s core. In addition, the driving forces maintaining and stabilizing the sonicated protein aggregates mainly involved hydrophobic forces, disulfide bonding, and hydrogen bonding interactions. Under specific pH and temperature conditions, the water holding capacity, oil holding capacity, foaming capacity and stability, emulsion activity, and stability of UAE increased significantly from 2.01 g/g to 2.52 g/g, 3.90 g/g to 5.53 g/g, 92.56% to 111.90%, 58.97% to 89.36%, 13.85% to 15.37%, and 100.22% to 136.53%, respectively, compared to conventional alkali extraction. The findings contributed to a new approach for the high-value utilization of agricultural waste from D. rubrovolvata. Full article
(This article belongs to the Special Issue Functional Ingredients from Food Waste and By-Products: Processing Technologies, Functional Characteristics and Value-Added Applications)
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17 pages, 4954 KiB  
Article
Zn Biofortification of Dutch Cucumbers with Chemically Modified Spent Coffee Grounds: Zn Enrichment and Nutritional Implications
by Beatriz Navajas-Porras, Ana Cervera-Mata, Alejandro Fernández-Arteaga, Adriana Delgado-Osorio, Miguel Navarro-Moreno, Daniel Hinojosa-Nogueira, Silvia Pastoriza, Gabriel Delgado, Miguel Navarro-Alarcón and José Ángel Rufián-Henares
Foods 2024, 13(8), 1146; https://doi.org/10.3390/foods13081146 - 09 Apr 2024
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Abstract
Spent coffee grounds (SCGs) are a food waste with a large generation around the world. However, their utilization as a soil organic amendment is difficult due to their phytotoxic effect. In the present work, the impact of agronomic biofortification on Dutch cucumbers was [...] Read more.
Spent coffee grounds (SCGs) are a food waste with a large generation around the world. However, their utilization as a soil organic amendment is difficult due to their phytotoxic effect. In the present work, the impact of agronomic biofortification on Dutch cucumbers was studied by using different chemically modified SCGs, analyzing their effects on Zn content, the release of antioxidant capacity and the production of short-chain fatty acids after in vitro digestion–fermentation. The results indicated variations in the Zn content and chemical composition of cucumbers according to the treatment groups. The functionalized with Zn and activated SCGs were able to increase Zn levels in cucumbers. Meanwhile, the activated hydrochar obtained at 160 °C and the activated and functionalized with Zn SCGs showed the highest Zn supply per serving. Differences in the antioxidant capacity and short-chain fatty acid production were observed between the groups. It is concluded that the growing conditions and the presence of Zn may significantly influence the contribution of these cucumbers to the dietary intake of nutrients and antioxidants, which could have important implications for human health and nutrition. Full article
(This article belongs to the Special Issue Functional Ingredients from Food Waste and By-Products: Processing Technologies, Functional Characteristics and Value-Added Applications)
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12 pages, 1370 KiB  
Article
The Potential of Crude and Partially Purified Black Rice Bran Extracts Obtained by Ultrasound-Assisted Extraction: Anti-Glycemic, Cytotoxicity, Cytoprotective, and Antitumoral Effects
by Eduardo Leonarski, Mayara Kuasnei, Eloisa H. Santos, Paulo A. D. Moraes, Karina Cesca, Débora de Oliveira and Acácio A. F. Zielinski
Foods 2024, 13(4), 597; https://doi.org/10.3390/foods13040597 - 16 Feb 2024
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Abstract
Recovering anthocyanins from black rice bran is a way of valuing this byproduct, by obtaining an extract with biological potential. The objective of this study was to recover anthocyanins using ultrasound-assisted extraction. Some of the extract was partially purified, and both (crude and [...] Read more.
Recovering anthocyanins from black rice bran is a way of valuing this byproduct, by obtaining an extract with biological potential. The objective of this study was to recover anthocyanins using ultrasound-assisted extraction. Some of the extract was partially purified, and both (crude and partially purified) extracts were evaluated for their anthocyanin content, antioxidant activity, antidiabetic and antitumoral activities, cytotoxicity, and oxidative stress. An increase in the laboratory scale was also achieved, making possible to increase the extraction volume up to 20 times without significantly changing the content of anthocyanins (1.85 mg C3G/g DW). It was found that the purified sample presented a 4.2 times higher value of total anthocyanins compared to the crude sample. The best IC50 values for the purified sample were verified by DPPH and ABTS (0.76 and 0.33 mg/mL). The best results for antidiabetic activity were obtained for the partially purified sample: 0.82 µM C3G for α-glucosidase and 12.5 µM C3G for α-amylase. The extracts demonstrated protection (~70%) when subjected to the oxidative stress of L929 cells. An antitumoral effect of 25–30% for both extracts was found in A459 cells. The crude and partially purified extracts of black rice have antidiabetic and anticancer effects and more studies are needed to explore their potential. Full article
(This article belongs to the Special Issue Functional Ingredients from Food Waste and By-Products: Processing Technologies, Functional Characteristics and Value-Added Applications)
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15 pages, 3765 KiB  
Article
The Prebiotic Activity of a Novel Polysaccharide Extracted from Huangshui by Fecal Fermentation In Vitro
by Mei Li, Jian Su, Jihong Wu, Dong Zhao, Mingquan Huang, Yanping Lu, Jia Zheng and Hehe Li
Foods 2023, 12(24), 4406; https://doi.org/10.3390/foods12244406 - 07 Dec 2023
Viewed by 986
Abstract
A novel polysaccharide, HSP80-2, with an average molecular weight of 13.8 kDa, was successfully isolated by the gradient ethanol precipitation (GEP) method from Huangshui (HS), the by-product of Chinese Baijiu. It was mainly composed of arabinose, xylose, and glucose with a molar ratio [...] Read more.
A novel polysaccharide, HSP80-2, with an average molecular weight of 13.8 kDa, was successfully isolated by the gradient ethanol precipitation (GEP) method from Huangshui (HS), the by-product of Chinese Baijiu. It was mainly composed of arabinose, xylose, and glucose with a molar ratio of 4.0:3.1:2.4, which was completely different from the previous reported HS polysaccharides (HSPs). Morphological observations indicated that HSP80-2 exhibited a smooth but uneven fragmented structure. Moreover, HSP80-2 exerted prebiotic activity evaluated by in vitro fermentation. Specifically, HSP80-2 was utilized by gut microbiota, and significantly regulated the composition and abundance of beneficial microbiota such as Phascolarctobacterium, Parabacteroides, and Bacteroides. Notably, KEGG pathway enrichment analysis illustrated that HSP80-2 enriched the pathways of amino sugar and nucleotide sugar metabolism (Ko00520), galactose metabolism (ko00052), and the citrate cycle (TCA cycle) (ko00020). Meanwhile, the contents of short-chain fatty acids (SCFAs) mainly including acetic acid, propionic acid, and butyric acid in the HSP80-2 group were remarkably increased, which was closely associated with the growth of Lachnoclostridium and Parabacteroides. These results showed that HSP80-2 might be used as a potential functional factor to promote human gut health, which further extended the high value utilization of HS. Full article
(This article belongs to the Special Issue Functional Ingredients from Food Waste and By-Products: Processing Technologies, Functional Characteristics and Value-Added Applications)
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