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A biorefinery for conversion of citrus peel waste into essential oils, pectin, fertilizer and succinic acid via different fermentation strategies.
Waste Manag. 2020 Jul 15; 113:469-477.WM

Abstract

A process for the valorization of citrus peel waste (CPW) has been developed aiming to produce succinic acid and a series of added-value products through the biorefinery platform. CPW was subject to physicochemical and biological treatment to isolate essential oils (0.43%) and pectin (30.53%) as extractable products, pretreating the material for subsequent production of succinic acid that enabled application of remaining biorefinery residues (BR) as fertilizer substitute. Cellulose, hemicellulose and lignin contents of CPW accounted for 22.45%, 8.05% and 0.66% respectively, while acid hydrolysis reduced hemicellulose by 3.42% in BR. Moreover, essential oils extracted from CPW included 17 compounds, among which D-limonene reached 96.7%. The hydrolyzate generated was fermented for succinic acid production using Actinobacillus succinogenes. Different batch experiments demonstrated that the combined use of corn steep liquor (CSL) and vitamins in a lab-scale bioreactor resulted in product concentration and yield that reached 18.5 g L-1 and 0.62 g g-1 respectively. Although simultaneous saccharification and fermentation (SSF) could not enhance succinic acid production, a fed-batch fermentation strategy increased succinic acid concentration and yield generating 22.4 g L-1 and 0.73 g g-1 respectively, while the mass of the platform chemical formed was enhanced by 27% as compared to the batch process. BR was explored as fertilizer substitute aiming to close the loop in the management of CPW towards development of a zero-waste process demonstrating that although the material imposed stress on plant growth, the content of potassium, phosphorus and nitrogen in the mixture increased.

Authors+Show Affiliations

Department of Chemical Engineering, Cyprus University of Technology, 30 Archbishop Kyprianou Str., 3036 Limassol, Cyprus.Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, 30 Archbishop Kyprianou Str., 3036 Limassol, Cyprus.Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, 30 Archbishop Kyprianou Str., 3036 Limassol, Cyprus.Department of Chemical Engineering, Cyprus University of Technology, 30 Archbishop Kyprianou Str., 3036 Limassol, Cyprus. Electronic address: michail.koutinas@cut.ac.cy.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32604008

Citation

Patsalou, Maria, et al. "A Biorefinery for Conversion of Citrus Peel Waste Into Essential Oils, Pectin, Fertilizer and Succinic Acid Via Different Fermentation Strategies." Waste Management (New York, N.Y.), vol. 113, 2020, pp. 469-477.
Patsalou M, Chrysargyris A, Tzortzakis N, et al. A biorefinery for conversion of citrus peel waste into essential oils, pectin, fertilizer and succinic acid via different fermentation strategies. Waste Manag. 2020;113:469-477.
Patsalou, M., Chrysargyris, A., Tzortzakis, N., & Koutinas, M. (2020). A biorefinery for conversion of citrus peel waste into essential oils, pectin, fertilizer and succinic acid via different fermentation strategies. Waste Management (New York, N.Y.), 113, 469-477. https://doi.org/10.1016/j.wasman.2020.06.020
Patsalou M, et al. A Biorefinery for Conversion of Citrus Peel Waste Into Essential Oils, Pectin, Fertilizer and Succinic Acid Via Different Fermentation Strategies. Waste Manag. 2020 Jul 15;113:469-477. PubMed PMID: 32604008.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A biorefinery for conversion of citrus peel waste into essential oils, pectin, fertilizer and succinic acid via different fermentation strategies. AU - Patsalou,Maria, AU - Chrysargyris,Antonios, AU - Tzortzakis,Nikolaos, AU - Koutinas,Michalis, Y1 - 2020/06/27/ PY - 2020/03/25/received PY - 2020/05/15/revised PY - 2020/06/15/accepted PY - 2020/7/1/pubmed PY - 2020/7/15/medline PY - 2020/7/1/entrez KW - A. succinogenes KW - Biorefinery KW - Citrus peel waste KW - Fertilizer KW - Succinic acid SP - 469 EP - 477 JF - Waste management (New York, N.Y.) JO - Waste Manag VL - 113 N2 - A process for the valorization of citrus peel waste (CPW) has been developed aiming to produce succinic acid and a series of added-value products through the biorefinery platform. CPW was subject to physicochemical and biological treatment to isolate essential oils (0.43%) and pectin (30.53%) as extractable products, pretreating the material for subsequent production of succinic acid that enabled application of remaining biorefinery residues (BR) as fertilizer substitute. Cellulose, hemicellulose and lignin contents of CPW accounted for 22.45%, 8.05% and 0.66% respectively, while acid hydrolysis reduced hemicellulose by 3.42% in BR. Moreover, essential oils extracted from CPW included 17 compounds, among which D-limonene reached 96.7%. The hydrolyzate generated was fermented for succinic acid production using Actinobacillus succinogenes. Different batch experiments demonstrated that the combined use of corn steep liquor (CSL) and vitamins in a lab-scale bioreactor resulted in product concentration and yield that reached 18.5 g L-1 and 0.62 g g-1 respectively. Although simultaneous saccharification and fermentation (SSF) could not enhance succinic acid production, a fed-batch fermentation strategy increased succinic acid concentration and yield generating 22.4 g L-1 and 0.73 g g-1 respectively, while the mass of the platform chemical formed was enhanced by 27% as compared to the batch process. BR was explored as fertilizer substitute aiming to close the loop in the management of CPW towards development of a zero-waste process demonstrating that although the material imposed stress on plant growth, the content of potassium, phosphorus and nitrogen in the mixture increased. SN - 1879-2456 UR - https://www.unboundmedicine.com/medline/citation/32604008/A_biorefinery_for_conversion_of_citrus_peel_waste_into_essential_oils,_pectin,_fertilizer_and_succinic_acid_via_different_fermentation_strategies L2 - https://linkinghub.elsevier.com/retrieve/pii/S0956-053X(20)30330-5 DB - PRIME DP - Unbound Medicine ER -