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Citrus fruits are one of the most widely used fruits around the world and are used as raw fruits, but are also processed into products such as beverages, and large amounts of by-products and waste are generated in this process. Globally, disposal of citrus waste (CW) through simple landfilling or ocean dumping can result in soil and groundwater contamination, which can negatively impact ecosystem health. The case of Korea is not much different in that these wastes are simply buried or recycled wastes are used as livestock feed additives. However, there are many reports that CW, which is a waste, has high potential to produce a variety of products that can minimize environmental load and increase added value through appropriate waste management. In this study, we aim to explore the latest developments in the evaluation and valorization of the growing CW green technologies in an effort to efficiently and environmentally transform these CW for resource recovery, sustainability, and economic benefits. Recent research strategies on integrated biorefinery approaches have confirmed that CW can be converted into various bioproducts such as enzymes, biofuels and biopolymers, further contributing to energy security. It was found that more efforts are needed to scale up green recovery technologies and achieve diverse product profiling to achieve zero waste levels and industrial viability.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11013942 | PMC |
http://dx.doi.org/10.3390/molecules29071589 | DOI Listing |
Food Chem
August 2025
Food Engineering and Technology Department, Institute of Chemical Technology, Matunga, Mumbai, India.
Coextraction of Citrullus lanatus seeds and Citrus aurantium peels (1:1, w/w), two food processing wastes, was performed using supercritical carbon dioxide (scCO) (345 bar|57 °C|178 min) and pet ether solvents. The major objective of the study was to valorize two fruit processing wastes to obtain a bioactive coextract using a green scCO extraction process and further incorporate it into wax-based composite oleofoams. The scCO coextraction resulted in better extraction of bioactive compounds such as d-limonene and polyunsaturated fatty acids due to the absence of light and lower temperature of extraction, compared to pet ether.
View Article and Find Full Text PDFBiosens Bioelectron
August 2025
Faculty of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, 3200003, Haifa, Israel; The Resnick Sustainable Center for Catalysis, Technion - Israel Institute of Technology, 3200003, Haifa, Israel; Nancy and Stephen Grand Technion Energy Program, Technion - Israel Instit
Exploiting biomass as a fuel source has attracted increasing attention over the last few decades. Combined biotic-abiotic systems can enhance conversion efficiency, but biotic reactions often require oxygen-free conditions, which are hindered by oxygen evolution at the photoanode. Herein, we develop a modular microbial-photoelectrochemical cell (MPEC) that facilitates the one-pot degradation and light-induced conversion of cellulosic material into electrical power and added-value compounds.
View Article and Find Full Text PDFMicroorganisms
August 2025
Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67132 Xanthi, Greece.
The citrus processing industry is an economically important agro-industrial sector worldwide; however, it produces significant amounts of waste annually. The biorefinery concept and the recovery of bio-based materials from agro-industrial residues, including citrus processing waste, are emphasized in the European Green Deal, reflecting the EU's commitment to fostering circularity. Biotreatment of citrus processing waste, including bioconversion into biomethane, biohydrogen, bioethanol and biodiesel, has been applied to valorize biomass for energy recovery.
View Article and Find Full Text PDFColloids Surf B Biointerfaces
December 2025
School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 210094, China. Electronic address:
Efficient phosphate (P) treatment and resource recovery from water are crucial environmental challenges in water pollution management. In this study, a bimetallic La-Ce nanoparticle Citrus limon residue-based biosorbent was developed through a solvothermal synthesis method, using fruit waste as the raw material. This research work revealed that the surface of the agricultural waste became rough and uniformly layered through La and Ce after modification.
View Article and Find Full Text PDFInt J Biol Macromol
September 2025
Department of Nutrition, Faculty of Health and Nutrition Sciences, Yasuj University of Medical Sciences, Yasuj, Iran.
This study presents the innovative development of an intelligent biopolymer film based on gelatin and pectin (Gel/Pec), enriched with anthocyanins extracted from Hibiscus sabdariffa L. (HSAs) and carbon dots synthesized from orange peels (OP-CDs), for application in smart food packaging. The integration of HSAs and OP-CDs markedly improved the mechanical performance of the Gel/Pec films.
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