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Advances and Applications of Food Industry By-Products

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Food Science and Technology".

Deadline for manuscript submissions: 31 December 2026 | Viewed by 1118

Special Issue Editor


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Guest Editor
Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
Interests: viscosity; food preservation; food processing and engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In scientific research, food industry by-products (FIBs) have attracted interest as valuable raw material for many decades. On the other hand, sustainable food production has become a must in recent years and this research field is gaining importance not only from the scientific point of view, but also from the industrial point of view.

With the EU concept of using by-products first as food, second as feed and and third as fuel, FIBs have emerged as an inexhaustible topic in science. This includes the use of food in its “as-is” state, or modified, raw material for the extraction of bioactive components and isolation of fibre, substrates for microbial production of oil, biofuels, mushrooms, use for incapsulation, water purification, etc. Along with the benefits of FIBs, attention should be focused on resolving issues such as microbial contaminantion, pesticides and PAHs in order to increase their safety for use in food and feed. Therefore, this Special Issue aims to cover topics including (but not limited to) the following:

  • Use of FIB in food production—influence on processing issues, sensory properties, stability, etc., and nutritive value of food.
  • Use of FIB in animal feed.
  • Safety issues.
  • (Extraction of) bioactive components from FIB and potential of their use in food, cosmetics and pharmaceutical products.
  • Fibre isolation from FIB with further application (incapsulation, food production, etc.).
  • FIB as adsorbents in water purification.
  • FIB as substrates in microbial fermentation.

Dr. Djurdjica Ačkar
Guest Editor

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Keywords

  • bioactive compounds
  • fibre
  • extraction
  • food processing
  • nutritive value
  • safety
  • biofuel
  • water purification
  • incapsualtion

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Published Papers (2 papers)

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Research

16 pages, 1829 KB  
Article
Influence of Fat Choice on Physical Properties of Sustainable, Nutritionally Improved Cocoa Spreads
by Đurđica Ačkar, Veronika Barišić, Ivana Lončarević, Jovana Petrović, Kristina Doko and Ivana Flanjak
Appl. Sci. 2026, 16(2), 936; https://doi.org/10.3390/app16020936 - 16 Jan 2026
Viewed by 346
Abstract
The aim of this research was to examine the possibility of achieving optimum texture and rheological properties of cocoa spreads produced with cocoa shell, xylitol, and stevia as sugar replacers using different vegetable fats (palm and coconut oil). Samples with different proportions of [...] Read more.
The aim of this research was to examine the possibility of achieving optimum texture and rheological properties of cocoa spreads produced with cocoa shell, xylitol, and stevia as sugar replacers using different vegetable fats (palm and coconut oil). Samples with different proportions of cocoa shell and sweeteners used to completely replace sugar were produced under laboratory conditions, and rheology, texture, colloidal stability, and particle size were determined. The results showed that texture properties (spreadability and firmness) and yield stress directly correlated with the type of fat used in the recipe, with the best values obtained for coconut fat. Cocoa shell addition increases Casson plastic viscosity (from approximately 2 to 7 Pas) but may reduce Casson yield stress if added in a proportion up to 25% (from approximately 26 to 18 Pa for samples produced with a combination of palm and coconut oil). Overall, samples with coconut fat had better texture properties regardless of the cocoa shell and sweetener quantities, and the sample with the lowest content of cocoa shell had the best spreadability. By careful adjustment of ingredients and the right choice of substitute fat, sustainable, nutritionally improved cocoa spreads with satisfactory texture and rheology may be produced. Full article
(This article belongs to the Special Issue Advances and Applications of Food Industry By-Products)
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26 pages, 1323 KB  
Article
Effect of Pulsed Electric Fields on the Drying Process of Orange Peel Waste
by Varvara Andreou, Achilleas Ntafoulis, Panagiotis Konstantinos Masouras, Marianna Giannoglou, Maria Giannakourou, Petros Taoukis and George Katsaros
Appl. Sci. 2025, 15(24), 13096; https://doi.org/10.3390/app152413096 - 12 Dec 2025
Cited by 1 | Viewed by 477
Abstract
The objective of this work was to evaluate the potential of PEF application on the decrease in orange peel air-drying time and temperature, resulting in energy savings. Orange peel waste (by-product of squeezable orange juice typical production, with a moisture content of 70%) [...] Read more.
The objective of this work was to evaluate the potential of PEF application on the decrease in orange peel air-drying time and temperature, resulting in energy savings. Orange peel waste (by-product of squeezable orange juice typical production, with a moisture content of 70%) was PEF pretreated (1.0–5.0 kV/cm electric field strength, frequency of 20 Hz, pulse width 15 μs, >1000 pulses), achieving a cell disintegration index Z ranging from 0.1 to 0.8. Drying experiments of PEF-treated orange peels were carried out at mild temperatures (40–70 °C). The moisture diffusion coefficients Deff and the air-drying energy consumed of all samples were estimated and compared. At low drying temperatures (<55 °C), PEF treatment led to increased effective moisture diffusivity Deff by up to 25%, resulting in reduced drying time and energy savings up to 15 MJ/kg, compared to untreated samples. More intense PEF conditions resulted in higher drying rates, while, for temperatures > 60 °C, there was no significant effect on the moisture diffusion coefficient for PEF pretreated samples. PEF treatment did not lead to changes in the antioxidant activity of dried samples. The results showed the potential of PEF pretreatment to accelerate the drying process of orange peel waste minimizing energy consumption. Full article
(This article belongs to the Special Issue Advances and Applications of Food Industry By-Products)
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