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Martínez-Avila O, Llenas L, Ponsá S. Sustainable polyhydroxyalkanoates production via solid-state fermentation: Influence of the operational parameters and scaling up of the process. Food and Bioproducts Processing 2022. [DOI: 10.1016/j.fbp.2021.12.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Martínez-Avila O, Muñoz-Torrero P, Sánchez A, Font X, Barrena R. Valorization of agro-industrial wastes by producing 2-phenylethanol via solid-state fermentation: Influence of substrate selection on the process. Waste Manag 2021; 121:403-411. [PMID: 33445113 DOI: 10.1016/j.wasman.2020.12.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 12/07/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
2-phenylethanol (2-PE) is a value-added compound widely used in industry due to its rose-like odor and antibacterial properties that can be bioproduced using wastes as raw materials. This study presents the valorization of nine agro-industrial wastes as potential substrates for 2-PE production using an isolated 2-PE producer Pichia kudriavzevii, and the solid-state fermentation (SSF) technology as an alternative approach. The assessed substrates comprised wastes of varied traits such that each of them provided different characteristics to the fermentation. Thus, by using a principal component analysis (PCA), it was possible to identify the most significant characteristics associated with the substrates affecting the 2-PE production. Results show that L-phenylalanine biotransformation was more efficient than de novo synthesis for producing 2-PE. Besides, from the evaluated set, the maximum 2-PE production was achieved with red apple pomace, reaching 1.7 and 25.2 mg2PE per gram of used waste through de novo and L-phenylalanine biotransformation, respectively. In that scenario, volumetric productivity and precursor yield were 39.6 mg2PE L-1h-1 and 0.69 g2PE per gram of L-phenylalanine added, respectively. From the PCA, it was identified that the reducing sugars content of the substrate, the air-filled porosity of the bed and the L-phenylalanine availability were the most critical parameters (associated with the substrates) influencing the microbial activity and 2-PE production. These results suggest that the desirable traits a solid media needs for promoting 2-PE production via SSF could be reached by using a combination of wastes in a synergistic approach.
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Affiliation(s)
- Oscar Martínez-Avila
- Composting Research Group, Department of Chemical, Biological and Environmental Engineering. Escola d'Enginyeria, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain.
| | - Patricia Muñoz-Torrero
- Composting Research Group, Department of Chemical, Biological and Environmental Engineering. Escola d'Enginyeria, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Antoni Sánchez
- Composting Research Group, Department of Chemical, Biological and Environmental Engineering. Escola d'Enginyeria, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain.
| | - Xavier Font
- Composting Research Group, Department of Chemical, Biological and Environmental Engineering. Escola d'Enginyeria, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain.
| | - Raquel Barrena
- Composting Research Group, Department of Chemical, Biological and Environmental Engineering. Escola d'Enginyeria, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain.
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Corchado-Lopo C, Martínez-Avila O, Marti E, Llimós J, Busquets AM, Kucera D, Obruca S, Llenas L, Ponsá S. Brewer's spent grain as a no-cost substrate for polyhydroxyalkanoates production: Assessment of pretreatment strategies and different bacterial strains. N Biotechnol 2021; 62:60-67. [PMID: 33516825 DOI: 10.1016/j.nbt.2021.01.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 01/19/2021] [Accepted: 01/24/2021] [Indexed: 11/25/2022]
Abstract
Polyhydroxyalkanoates (PHAs) are polyesters of significant interest due to their biodegradability and properties similar to petroleum-derived plastics, as well as the fact that they can be produced from renewable sources such as by-product streams. In this study, brewer's spent grain (BSG), the main by-product of the brewing industry, was subjected to a set of physicochemical pretreatments and their effect on the release of reducing sugars (RS) was evaluated. The RS obtained were used as a substrate for further PHA production in Burkholderia cepacia, Bacillus cereus, and Cupriavidus necator in liquid cultures. Although some pretreatments proved efficient in releasing RS (acid-thermal pretreatment up to 42.1 gRS L-1 and 0.77 gRS g-1 dried BSG), the generation of inhibitors in such scenarios likely affected PHA production compared with the process run without pretreatment (direct enzymatic hydrolysis of BSG). Thus, the maximum PHA accumulation from BSG hydrolysates was found in the reference case with 0.31 ± 0.02 g PHA per g cell dried weight, corresponding to 1.13 ± 0.06 g L-1 and a PHA yield of 23 ± 1 mg g-1 BSG. It was also found that C. necator presented the highest PHA accumulation of the tested strains followed closely by B. cepacia, reaching their maxima at 48 h. Although BSG has been used as a source for other bioproducts, these results show the potential of this by-product as a no-cost raw material for producing PHAs in a waste valorization and circular economy scheme.
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Affiliation(s)
- Carlos Corchado-Lopo
- BETA Technological Center, TECNIO Network, University of Vic-Central University of Catalonia, Carrer de la Laura 13, 08500 Vic, Spain.
| | - Oscar Martínez-Avila
- BETA Technological Center, TECNIO Network, University of Vic-Central University of Catalonia, Carrer de la Laura 13, 08500 Vic, Spain.
| | - Elisabet Marti
- BETA Technological Center, TECNIO Network, University of Vic-Central University of Catalonia, Carrer de la Laura 13, 08500 Vic, Spain.
| | - Jordi Llimós
- BETA Technological Center, TECNIO Network, University of Vic-Central University of Catalonia, Carrer de la Laura 13, 08500 Vic, Spain.
| | - Anna María Busquets
- BETA Technological Center, TECNIO Network, University of Vic-Central University of Catalonia, Carrer de la Laura 13, 08500 Vic, Spain.
| | - Dan Kucera
- Faculty of Chemistry, Brno University of Technology, Purkynova 118, 612 00 Brno, Czech Republic.
| | - Stanislav Obruca
- Faculty of Chemistry, Brno University of Technology, Purkynova 118, 612 00 Brno, Czech Republic.
| | - Laia Llenas
- BETA Technological Center, TECNIO Network, University of Vic-Central University of Catalonia, Carrer de la Laura 13, 08500 Vic, Spain.
| | - Sergio Ponsá
- BETA Technological Center, TECNIO Network, University of Vic-Central University of Catalonia, Carrer de la Laura 13, 08500 Vic, Spain.
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Martínez-Avila O, Sánchez A, Font X, Barrena R. 2-phenylethanol (rose aroma) production potential of an isolated pichia kudriavzevii through solid-state fermentation. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.03.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Martínez-Avila O, Sánchez A, Font X, Barrena R. Fed-Batch and Sequential-Batch Approaches To Enhance the Bioproduction of 2-Phenylethanol and 2-Phenethyl Acetate in Solid-State Fermentation Residue-Based Systems. J Agric Food Chem 2019; 67:3389-3399. [PMID: 30816043 DOI: 10.1021/acs.jafc.9b00524] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This study describes the use of alternative operational strategies in the solid-state fermentation of the agro-industrial leftover sugar cane bagasse (SCB) supplemented with l-phenylalanine, for bioproducing natural 2-phenylethanol (2-PE) and 2-phenethyl acetate (2-PEA) using K. marxianus. Here, fed-batch and sequential-batch have been assessed at two scales (1.6 and 22 L) as tools to increase the production, as well as to enhance the sustainability of this residue-based process. While in the reference batch strategy a maximum of 17 mg of 2-PE+2-PEA per gram of added SCB was reached at both scales, the implementation of fed-batch mode induced a production increase of 11.6% and 12.5%, respectively. Also, the production was increased by 16.9% and 2.4% as compared to the batch when a sequential-batch mode was used. Furthermore, the use of these strategies was accompanied by lower consumption of key resources like the inoculum, air, and time, promoting savings between 22% and 76% at both scales.
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Affiliation(s)
- Oscar Martínez-Avila
- Composting Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria , Universitat Autònoma de Barcelona , Cerdanyola del Vallès, Barcelona 08193 , Spain
| | - Antoni Sánchez
- Composting Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria , Universitat Autònoma de Barcelona , Cerdanyola del Vallès, Barcelona 08193 , Spain
| | - Xavier Font
- Composting Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria , Universitat Autònoma de Barcelona , Cerdanyola del Vallès, Barcelona 08193 , Spain
| | - Raquel Barrena
- Composting Research Group, Department of Chemical, Biological and Environmental Engineering, Escola d'Enginyeria , Universitat Autònoma de Barcelona , Cerdanyola del Vallès, Barcelona 08193 , Spain
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Martínez-Avila O, Sánchez A, Font X, Barrena R. Bioprocesses for 2-phenylethanol and 2-phenylethyl acetate production: current state and perspectives. Appl Microbiol Biotechnol 2018; 102:9991-10004. [PMID: 30293195 DOI: 10.1007/s00253-018-9384-8] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 09/06/2018] [Accepted: 09/06/2018] [Indexed: 11/30/2022]
Abstract
2-Phenylethanol (2-PE) and 2-phenethyl acetate (2-PEA) are valuable generally recognized as safe flavoring agents widely used in industry. Perfumes, pharmaceuticals, polishes, and personal care products, are some of the final products using these compounds as additives due to their rose-like odor. Also, 2-PE is used in disinfectants, pest control, and cleaning products due to its biocide capability. Although most of these additives production are derived from chemical synthesis, the current trend of consumers to prefer natural products has contributed to the development of biotechnological approaches as an alternative way to obtain natural 2-PE and 2-PEA. The most efficient route to bioproduce these compounds is through the bioconversion of L-phenylalanine via the Ehrlich pathway, and most of the advances have been focused on the development of this process. This review compiles the most recent developments in the biotechnological production of 2-PE and 2-PEA, indicating the most studied strains producing 2-PE and 2-PEA, the current advances in the in situ product recovery in liquid systems, an overview of the strain developments, and the progress in the use of residue-based systems. Future research should address the need for more sustainable and economic systems such as those using wastes as raw materials, as well as the scale-up of the proposed technologies.
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Affiliation(s)
- Oscar Martínez-Avila
- Composting Research group, Department of Chemical, Biological and Environmental Engineering. Escola d'Enginyeria, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Antoni Sánchez
- Composting Research group, Department of Chemical, Biological and Environmental Engineering. Escola d'Enginyeria, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Xavier Font
- Composting Research group, Department of Chemical, Biological and Environmental Engineering. Escola d'Enginyeria, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain.
| | - Raquel Barrena
- Composting Research group, Department of Chemical, Biological and Environmental Engineering. Escola d'Enginyeria, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
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