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Hammad Hussain M, Sajid S, Martuscelli M, Aldahmash W, Zubair Mohsin M, Ashraf K, Guo M, Mohsin A. Sustainable biosynthesis of lycopene by using evolutionary adaptive recombinant Escherichia coli from orange peel waste. Heliyon 2024; 10:e34366. [PMID: 39114001 PMCID: PMC11305264 DOI: 10.1016/j.heliyon.2024.e34366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Revised: 07/02/2024] [Accepted: 07/08/2024] [Indexed: 08/10/2024] Open
Abstract
This study aimed to evaluate the hydrolysates from orange peel waste (OPW) as the low-cost carbon source for lycopene production. Initially, the dilute acid pretreatment combined with enzymatic hydrolysis of OPW resulted in a total sugar concentration of 62.18 g/L. Meanwhile, a four-month adaptive laboratory evolution (ALE) experiment using a d-galacturonic acid minimal medium resulted in an improvement in the growth rate of our previously engineered Escherichia coli strain for lycopene production. After evolutionary adaptation, response surface methodology (RSM) was adapted to optimize the medium composition in fermentation. The results obtained from RSM analysis revealed that the 5.53 % carbon source of orange peel hydrolysate (OPH), 6.57 g/L nitrogen source, and 30 °C temperature boosted lycopene production in the final strain. Subsequently, the optimized treatment for lycopene fermentation was then conducted in a 5 L batch fermenter under the surveillance of a kinetic model that uses the Logistic equation for strain growth (μm = 0.441 h-1), and Luedeking-Piret equations for lycopene production (Pm = 1043 mgL-1) with growth rate constant (α = 0.1491). At last, lycopene biosynthesized from OPH was extracted and analyzed for qualitative validation. Likewise, its data on phytic acid (between 1.01 % and 0.86 %) and DPPH radical scavenging (between 38.06 % and 29.08 %) highlighted the better antioxidant capacity of lycopene. In conclusion, the OPH can be used as a fermentation feedstock which opens new possibilities of exploiting fruit crop residues for food and pharmaceutical applications.
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Affiliation(s)
- Muhammad Hammad Hussain
- State Key Laboratory of Bioreactor Engineering East China University of Science and Technology, Shanghai, 200237, PR China
| | - Subra Sajid
- Department of Biotechnology, Fatima Jinnah Women University, Rawalpindi, 46000, Pakistan
| | - Maria Martuscelli
- Department of Bioscience and Food, Agricultural and Environmental Technology, University of the Studies of Teramo, Via Balzarini 1, 64100, Teramo (TE), Italy
| | - Waleed Aldahmash
- Department of Zoology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Muhammad Zubair Mohsin
- State Key Laboratory of Bioreactor Engineering East China University of Science and Technology, Shanghai, 200237, PR China
| | - Kamran Ashraf
- State Key Laboratory of Bioreactor Engineering East China University of Science and Technology, Shanghai, 200237, PR China
| | - Meijin Guo
- State Key Laboratory of Bioreactor Engineering East China University of Science and Technology, Shanghai, 200237, PR China
| | - Ali Mohsin
- State Key Laboratory of Bioreactor Engineering East China University of Science and Technology, Shanghai, 200237, PR China
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Psakis G, Lia F, Valdramidis VP, Gatt R. Exploring hydrodynamic cavitation for citrus waste valorisation in Malta: from beverage enhancement to potato sprouting suppression and water remediation. Front Chem 2024; 12:1411727. [PMID: 38860238 PMCID: PMC11163080 DOI: 10.3389/fchem.2024.1411727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 05/13/2024] [Indexed: 06/12/2024] Open
Abstract
Introduction: The endorsement of circular economy, zero-waste, and sustainable development by the EU and UN has promoted non-thermal technologies in agro-food and health industries. While northern European countries rapidly integrate these technologies, their implementation in Mediterranean food-supply chains remains uncertain. Aims: We evaluated the usefulness of hydrodynamic cavitation (HC) for valorizing orange peel waste in the fresh orange juice supply chain of the Maltese Islands. Method: We assessed: a) the effectiveness of HC in extracting bioactive compounds from orange peels (Citrus sinensis) in water (35°C) and 70% (v/v) ethanol (-10°C) over time, compared to conventional maceration, and b) the potato sprouting-suppression and biosorbent potential of the processed peel for copper, nitrate, and nitrite binding. Results: Prolonged HC-assisted extractions in water (high cavitation numbers), damaged and/or oxidized bioactive compounds, with flavonoids and ascorbic acid being more sensitive, whereas cold ethanolic extractions preserved the compounds involved in radical scavenging. HC-processing adequately modified the peel, enabling its use as a potato suppressant and biosorbent for copper, nitrate, and nitrite. Conclusion: Coupling HC-assisted bioactive compound extractions with using leftover peel for potato-sprouting prevention and as biosorbent for water pollutant removal offers a straightforward approach to promoting circular economic practices and sustainable agriculture in Malta.
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Affiliation(s)
- Georgios Psakis
- Institute of Applied Sciences (IAS), The Malta College of Arts, Science and Technology (MCAST), Paola, Malta
- Metamaterials Unit, Faculty of Science, University of Malta (UM), Msida, Malta
| | - Frederick Lia
- Institute of Applied Sciences (IAS), The Malta College of Arts, Science and Technology (MCAST), Paola, Malta
- Metamaterials Unit, Faculty of Science, University of Malta (UM), Msida, Malta
| | - Vasilis P. Valdramidis
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens (NKUA), Athens, Greece
| | - Ruben Gatt
- Metamaterials Unit, Faculty of Science, University of Malta (UM), Msida, Malta
- Centre for Molecular Medicine and Biobanking, University of Malta (UM), Msida, Malta
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Pagliarini E, Minichiello C, Sisti L, Totaro G, Baffoni L, Di Gioia D, Saccani A. From food waste to eco-friendly functionalized polymer composites: Investigation of orange peels as active filler. N Biotechnol 2024; 80:37-45. [PMID: 38253287 DOI: 10.1016/j.nbt.2024.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/17/2024] [Accepted: 01/18/2024] [Indexed: 01/24/2024]
Abstract
The development of eco-friendly polymer composites with multifunctional properties aligns with the goals of the circular economy agenda, which aims to minimize waste and promote the sustainable use of resources by closing the loop of product life cycles. Eco-friendly polymer composites play a crucial role in achieving these objectives. The present work focuses on the preparation of fully biobased blends obtained by melt mixing a bio-polyester, poly(butylene succinate-co-adipate) (PBSA), with orange peels up to 20 wt%, to yield active polymer composites. Orange peels, employed here as natural filler, are largely available from food wastes, they are rich in phenolic compounds and possess antioxidant activity as shown by the experimental tests carried out. The thermal stability of the formulated composites is almost unchanged by the filler addition, showing only a slight decrease of the crystallization temperatures and crystalline fraction within the composites. The mechanical properties of the compounds evidence an increase in the elastic modulus together with a decrease in the tensile strength, while the elongation at break remains almost constant. The incorporation of the natural filler enabled the integration of antioxidant and antibacterial properties, which were absent in the original pristine polymer.
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Affiliation(s)
- Elia Pagliarini
- Dipartimento di Scienze e Tecnologie Agro-Alimentari, Università di Bologna, Via Fanin 40, Bologna, Italy
| | - Carmen Minichiello
- Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università di Bologna, Via Terracini 28, 40131 Bologna, Italy
| | - Laura Sisti
- Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università di Bologna, Via Terracini 28, 40131 Bologna, Italy.
| | - Grazia Totaro
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, 56124 Pisa, Italy
| | - Loredana Baffoni
- Dipartimento di Scienze e Tecnologie Agro-Alimentari, Università di Bologna, Via Fanin 40, Bologna, Italy
| | - Diana Di Gioia
- Dipartimento di Scienze e Tecnologie Agro-Alimentari, Università di Bologna, Via Fanin 40, Bologna, Italy
| | - Andrea Saccani
- Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università di Bologna, Via Terracini 28, 40131 Bologna, Italy
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Liang X, Huang L, Ling M, Li L, Ruan L, Shang C. The effect of PK gene overexpression on content and antioxidant properties of carotenoids in marine microalga Dunaliella parva. Gene 2024; 898:148120. [PMID: 38163626 DOI: 10.1016/j.gene.2023.148120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 12/28/2023] [Accepted: 12/29/2023] [Indexed: 01/03/2024]
Abstract
Dunaliella parva can extensively accumulate carotenoids, which is a promising raw material for carotenoids production. Carotenoids have important medicinal value. D. parva is an ideal organism for studying the mechanism of carotenoid synthesis. Our previous study identified a transcription factor DpAP2 which could regulate carotenoid synthesis in D. parva. In addition, DpAP2 could interact with three proteins with different activities (DNA binding transcription factor activity, protein kinase activity, and alpha-D-phosphohexomutase). To investigate the function of PK gene encoding interacting protein of DpAP2 with protein kinase activity in D. parva, PK gene was cloned into vector pBI221-GFP-UbiΩ-CAT and transformed into D. parva in this study. The results showed that overexpression of PK gene enhanced the contents of carotenoids, total sugars, proteins, and antioxidant activities of carotenoid extract such as superoxide radical scavenging activity, reducing power, hydroxyl radical scavenging activity in transgenic D. parva with overexpression of PK gene. This study explored the function of PK gene, and improved the medicinal value of D. parva.
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Affiliation(s)
- Xiuli Liang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin (Guangxi Normal University), Guilin, Guangxi 541006, China.
| | - Limei Huang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin (Guangxi Normal University), Guilin, Guangxi 541006, China.
| | - Mengxiang Ling
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin (Guangxi Normal University), Guilin, Guangxi 541006, China.
| | - Lihua Li
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin (Guangxi Normal University), Guilin, Guangxi 541006, China.
| | - Lingru Ruan
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin (Guangxi Normal University), Guilin, Guangxi 541006, China.
| | - Changhua Shang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin (Guangxi Normal University), Guilin, Guangxi 541006, China.
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Bocker R, Silva EK. Pulsed electric field technology as a promising pre-treatment for enhancing orange agro-industrial waste biorefinery. RSC Adv 2024; 14:2116-2133. [PMID: 38196909 PMCID: PMC10775899 DOI: 10.1039/d3ra07848e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 12/24/2023] [Indexed: 01/11/2024] Open
Abstract
In the processing of orange juice, 50-70% of the fresh fruit weight is converted into organic waste. Orange processing waste (OPW) primarily consists of peels, seeds, and pulp. Improper disposal of this residue can lead to greenhouse gas emissions, environmental pollution, and the wastage of natural resources. To address this ecological issues, recent research has focused on developing innovative process designs to maximize the valorization of OPW through biorefinery strategies. However, the current challenge in implementing these methods for industrial waste management is their significant energy consumption. In response to these challenges, recent studies have explored the potential of employing pulsed electric field (PEF) technology as a pre-treatment to improve energy efficiency in biorefinery processes. This non-thermal and emerging technology can enhance the mass transfer of intracellular components via electroporation of cell walls, thereby resulting in shorter processing times, lower energy inputs, greater retention of thermosensitive components, and higher extraction yields. In this regard, this review offers a comprehensive discussion on the innovative biorefinery strategies to the valorization of OPW, with a specific focus on recent studies assessing the technical feasibility of methodologies for the extraction of phytochemical compounds, dehydration processes, and bioconversion methods. Recent studies that discussed the potential of PEF technology to reduce energy demand by increasing the mass transfer of biological tissues were emphasized.
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Affiliation(s)
- Ramon Bocker
- Faculdade de Engenharia de Alimentos (FEA), Universidade Estadual de Campinas (UNICAMP) Rua Monteiro Lobato, 80 Campinas-SP CEP:13083-862 Brazil
| | - Eric Keven Silva
- Faculdade de Engenharia de Alimentos (FEA), Universidade Estadual de Campinas (UNICAMP) Rua Monteiro Lobato, 80 Campinas-SP CEP:13083-862 Brazil
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6
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Ortiz-Sanchez M, Solarte-Toro JC, Inocencio-García PJ, Cardona Alzate CA. Sustainability analysis of orange peel biorefineries. Enzyme Microb Technol 2024; 172:110327. [PMID: 37804740 DOI: 10.1016/j.enzmictec.2023.110327] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 09/02/2023] [Accepted: 09/18/2023] [Indexed: 10/09/2023]
Abstract
Biorefineries are constantly evolving since new technological advances in enzyme and microbial processes are boosting research for producing new bio-based products. Nevertheless, the step towards real process implementation must overcome a series of stages based on process sustainability in the early design stages. Orange peel (OP) has been profiled as a potential raw material for producing different products. Few studies have estimated the sustainability of OP-based biorefineries considering the upstream influence on the final process performance. This research aims to perform the sustainability assessment of several OP valorization pathways based on experimental data applying the biorefinery concept. Steam distillation and polyphenolic compound extraction prior to saccharification and anaerobic digestion increase the process performance. A glucose concentration and biogas yield of 21.43 g/L (0.44 g/g OP, db) and 415 mL/g SV were obtained, respectively. An essential oil extraction yield of 1.17 g/100 g OP (db) with a d-limonene content of 91.62% was produced. Moreover, hesperidin, apigenin, and naringenin yields of 7.88 mg/g, 0.475 mg/g, and 0.675 mg/g were obtained. An OP-based biorefinery addressed to produce essential oil, polyphenolic compounds, and biogas with a processing 25 tons/day (wb) has a sustainability index of 66.88%, higher than the values obtained with lesser upstream stages. In conclusion, an integral OP upgrading leads to better enzymatic and anaerobic digestion performances, as well as, a high process sustainability.
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Affiliation(s)
- Mariana Ortiz-Sanchez
- Universidad Nacional de Colombia sede Manizales, Instituto de Biotecnología y Agroindustria, Departamento de Ingeniería Química, Km 07 vía al Magdalena, Manizales, Colombia.
| | - Juan Camilo Solarte-Toro
- Universidad Nacional de Colombia sede Manizales, Instituto de Biotecnología y Agroindustria, Departamento de Ingeniería Química, Km 07 vía al Magdalena, Manizales, Colombia.
| | - Pablo José Inocencio-García
- Universidad Nacional de Colombia sede Manizales, Instituto de Biotecnología y Agroindustria, Departamento de Ingeniería Química, Km 07 vía al Magdalena, Manizales, Colombia.
| | - Carlos Ariel Cardona Alzate
- Universidad Nacional de Colombia sede Manizales, Instituto de Biotecnología y Agroindustria, Departamento de Ingeniería Química, Km 07 vía al Magdalena, Manizales, Colombia.
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Costanzo G, Vitale E, Iesce MR, Spinelli M, Fontanarosa C, Paradiso R, Amoresano A, Arena C. Modulation of Antioxidant Compounds in Fruits of Citrus reticulata Blanco Using Postharvest LED Irradiation. BIOLOGY 2023; 12:1029. [PMID: 37508457 PMCID: PMC10376515 DOI: 10.3390/biology12071029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/11/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
Phlegrean mandarin fruits are already known for health-promoting properties due to the high concentration of phytochemicals in peel, pulp, and seed. Biotic and abiotic factors, including light, may modulate their biosynthesis, metabolism, and accumulation. In this context, light-emitting diodes (LED) have recently been applied to control nutritional traits, ripening process, senescence, fruit shelf-life, and pathogenic microbial spoilage of fruits. This study investigated the effect of the seven-day exposure of Phlegrean mandarin fruits to two LED regimes, white (W) and red-blue (RB), to test the possibility that the storage under specific light wavelengths may be used as green preservation technology that enhances fruit phytochemical properties. To pursue this aim, the antioxidant activity and polyphenolic profile of the pulp and peel of mandarins under W and RB light regimes were evaluated and compared with Control fruits not exposed to LED treatment. Our results indicated that storage under W and RB treatments modulates the antioxidant content in pulp and peel differently. Compared to W, the RB regime increases the ascorbic acid, flavonoid, anthocyanin, and carotenoid concentrations, while the polyphenol profile analysis reveals that the number of important phytochemicals, i.e., quercetin rutinoside, chlorogenic acid, sinensetin, and rutin, are higher under W. The overall data demonstrated that postharvest LED irradiation is a valid tool for modifying fruit phytochemical properties, which also boosts specific bioactive compounds.
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Affiliation(s)
- Giulia Costanzo
- Department of Biology, University of Naples Federico II, Via Cinthia, 80126 Napoli, Italy
| | - Ermenegilda Vitale
- Department of Biology, University of Naples Federico II, Via Cinthia, 80126 Napoli, Italy
| | - Maria Rosaria Iesce
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, 80126 Napoli, Italy
| | - Michele Spinelli
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, 80126 Napoli, Italy
| | - Carolina Fontanarosa
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, 80126 Napoli, Italy
| | - Roberta Paradiso
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Portici, Italy
| | - Angela Amoresano
- Department of Chemical Sciences, University of Naples Federico II, Via Cinthia, 80126 Napoli, Italy
| | - Carmen Arena
- Department of Biology, University of Naples Federico II, Via Cinthia, 80126 Napoli, Italy
- NBFC-National Biodiversity Future Center, 90133 Palermo, Italy
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Molina-Montero C, Vicente-Jurado D, Igual M, Martínez-Monzó J, García-Segovia P. Fiber Enrichment of 3D Printed Apricot Gel Snacks with Orange By-Products. Gels 2023; 9:569. [PMID: 37504448 PMCID: PMC10378880 DOI: 10.3390/gels9070569] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/29/2023] [Accepted: 07/10/2023] [Indexed: 07/29/2023] Open
Abstract
Concern about food waste has become a major global concern. The waste generated by the agri-food industry poses an environmental challenge. However, the development of 3D printing technology offers an opportunity to address this problem. By incorporating food waste into inks, it can create personalized food tailored to individual needs. The aim of this study is the valorization of orange by-products (OBP) in 3D printed gels to obtain a final product in the form of a fiber-enriched snack. Gelatin gels were printed with different concentrations of apricot pulp (30, 50, and 70%) and OBP was added. These gels were subjected to a freeze-drying process. The rheology of the gels before and after printing, the printing precision, and the post-treatment of the freeze-dried product, including color, shear force, and the presence of bioactive compounds, were evaluated. The addition of OBP resulted in an increase in the elasticity (997-1242u) of the samples and improved the printability of them. However, an increase in the hardness (173-184u) was observed in the freeze-dried samples. The use of OBP not only improves the printability of the gels but also enables obtaining fiber-enriched snacks, which could contribute to the reduction in food waste and the promotion of healthy and sustainable food.
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Affiliation(s)
- Carmen Molina-Montero
- i-Food Group, FoodUPV, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Diana Vicente-Jurado
- i-Food Group, FoodUPV, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Marta Igual
- i-Food Group, FoodUPV, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Javier Martínez-Monzó
- i-Food Group, FoodUPV, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
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Deba‐Rementeria S, Estrada O, Goñi‐de‐Cerio F, Vázquez‐Araújo L. Assessment of different debittering techniques to valorize orange peel. Int J Food Sci Technol 2023. [DOI: 10.1111/ijfs.16430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Affiliation(s)
- Shuyana Deba‐Rementeria
- BCCInnovation, Technology Center in Gastronomy Basque Culinary Center Donostia‐San Sebastián Spain
- Basque Culinary Center, Faculty of Gastronomy Sciences Mondragon Unibertsitatea Donostia‐San Sebastián Spain
| | - Olaia Estrada
- BCCInnovation, Technology Center in Gastronomy Basque Culinary Center Donostia‐San Sebastián Spain
| | - Felipe Goñi‐de‐Cerio
- GAIKER Technology Center Basque Research and Technology Alliance (BRTA) Zamudio Spain
| | - Laura Vázquez‐Araújo
- BCCInnovation, Technology Center in Gastronomy Basque Culinary Center Donostia‐San Sebastián Spain
- Basque Culinary Center, Faculty of Gastronomy Sciences Mondragon Unibertsitatea Donostia‐San Sebastián Spain
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10
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Valorization of Waste Orange Peels: Aqueous Antioxidant Polyphenol Extraction as Affected by Organic Acid Addition. BEVERAGES 2022. [DOI: 10.3390/beverages8040071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Waste orange peels (WOP) are a food processing residue rich in bioactive polyphenols. However, data on aqueous extraction processes for efficient polyphenol recovery are rather limited. The present study dealt with the optimization of WOP polyphenols, using a batch stirred-tank mode and water as solvent. After a preliminary single-factor examination, the implementation of response surface methodology revealed that optimum extraction time and temperature were 60 min and 55 °C, respectively. Under these conditions, the extraction afforded a total polyphenol yield of 26.13 ± 0.78 mg gallic acid equivalents per g dry mass. The use of aqueous solutions of citric, tartaric and lactic acid showed that total polyphenol yield may be significantly increased with 1% tartaric acid or equally with 2.5% citric acid. However, the effect on individual polyphenolic constituents was rather negligible, as determined by high-performance liquid chromatography. The discrepancies observed in the antioxidant properties of the extracts produced with water and acidified water were putatively attributed to some differences in the polyphenolic composition. The extraction methodology proposed is environmentally green and of low cost, and it could certainly be used as an effective means of recovering WOP polyphenols.
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Selahvarzi A, Ramezan Y, Sanjabi MR, Namdar B, Akbarmivehie M, Mirsaeedghazi H, Azarikia F. Optimization of ultrasonic-assisted extraction of phenolic compounds from pomegranate and orange peels and their antioxidant activity in a functional drink. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kim IJ, Jeong D, Kim SR. Upstream processes of citrus fruit waste biorefinery for complete valorization. BIORESOURCE TECHNOLOGY 2022; 362:127776. [PMID: 35970501 DOI: 10.1016/j.biortech.2022.127776] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Citrus fruit waste (CW) is a useful biomass and its valorization into fuels and biochemicals has received much attention. For economic feasibility, increased efficiency of the preceding extraction and enzyme saccharification processes is necessary. However, at present, there is a lack of systematic reviews addressing these two integral upstream processes in concert for CW biorefinery. Here, the state-of-the-art advancements in enzyme extraction and saccharification processes-using which relevant essential oils, flavonoids, and sugars can be obtained-are reviewed. Specifically, the extraction options for two commercially available CW-derived products, essential oils and pectin, are discussed. With respect to enzyme saccharification, the use of an undefined commercial mixture routinely results in suboptimal sugar production. In this respect, applicable strategies for enzyme mixture customization are suggested for maximizing the hydrolytic efficiency of CW. The enzyme degradation system for CW-derived carbohydrates and its extensive application for sugar production are also discussed.
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Affiliation(s)
- In Jung Kim
- Department of Applied Biosciences, Graduate School, Kyungpook National University, Daegu 41566, Korea
| | - Deokyeol Jeong
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Korea
| | - Soo Rin Kim
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Korea; Research Institute of Tailored Food Technology, Kyungpook National University, Daegu 41566, Korea.
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