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Valdez Castillo M, Brar SK, Arriaga S, Blais JF, Heitz M, Avalos Ramirez A. Co-Fermentation of Agri-Food Residues Using a Co-Culture of Yeasts as a New Bioprocess to Produce 2-Phenylethanol. Molecules 2023; 28:5536. [PMID: 37513409 PMCID: PMC10385721 DOI: 10.3390/molecules28145536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 07/15/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023] Open
Abstract
Whey is a dairy residue generated during the production of cheese and yogurt. Whey contains mainly lactose and proteins, contributing to its high chemical oxygen demand (COD). Current environmental regulations request proper whey disposal to avoid environmental pollution. Whey components can be transformed by yeast into ethanol and biomolecules with aroma and flavor properties, for example, 2-phenyethanol (2PE), highly appreciated in the industry due to its organoleptic and biocidal properties. The present study aimed to valorize agri-food residues in 2PE by developing suitable bioprocess. Cheese whey was used as substrate source, whereas crab headshells, residual soy cake, and brewer's spent yeast (BSY) were used as renewable nitrogen sources for the yeasts Kluyveromyces marxianus and Debaryomyces hansenii. The BSYs promoted the growth of both yeasts and the production of 2PE in flask fermentation. The bioprocess scale-up to 2 L bioreactor allowed for obtaining a 2PE productivity of 0.04 g2PE/L·h, twofold better productivity results compared to the literature. The bioprocess can save a treatment unit because the whey COD decreased under the detection limit of the analytical method, which is lower than environmental requirements. In this way, the bioprocess prevents environmental contamination and contributes to the circular economy of the dairy industry.
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Affiliation(s)
- Mariana Valdez Castillo
- Institut National de la Recherche Scientifique, Centre-Eau Terre Environnement, 490, Rue de la Couronne, Québec City, QC G1K 9A9, Canada
- Département de Génie Chimique et de Génie Biotechnologique, Faculté de Génie, Université de Sherbrooke, 2500 Boulevard de l'Université, Sherbrooke, QC J1K 2R1, Canada
- Centre National en Électrochimie et en Technologies Environnementales, 2263, Avenue du Collège, Shawinigan, QC G9N 6V8, Canada
| | - Satinder Kaur Brar
- Institut National de la Recherche Scientifique, Centre-Eau Terre Environnement, 490, Rue de la Couronne, Québec City, QC G1K 9A9, Canada
- Department of Civil Engineering, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada
| | - Sonia Arriaga
- Instituto Potosino de Investigación Científica y Tecnológica (IPICyT), División de Ciencias Ambientales, Camino a la Presa San José 2055, Lomas 4a Sección, San Luis Potosi CP 78216, Mexico
| | - Jean-François Blais
- Institut National de la Recherche Scientifique, Centre-Eau Terre Environnement, 490, Rue de la Couronne, Québec City, QC G1K 9A9, Canada
| | - Michèle Heitz
- Département de Génie Chimique et de Génie Biotechnologique, Faculté de Génie, Université de Sherbrooke, 2500 Boulevard de l'Université, Sherbrooke, QC J1K 2R1, Canada
| | - Antonio Avalos Ramirez
- Centre National en Électrochimie et en Technologies Environnementales, 2263, Avenue du Collège, Shawinigan, QC G9N 6V8, Canada
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Past, Present, and Future Perspectives on Whey as a Promising Feedstock for Bioethanol Production by Yeast. J Fungi (Basel) 2022; 8:jof8040395. [PMID: 35448626 PMCID: PMC9031875 DOI: 10.3390/jof8040395] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/02/2022] [Accepted: 04/11/2022] [Indexed: 12/10/2022] Open
Abstract
Concerns about fossil fuel depletion and the environmental effects of greenhouse gas emissions have led to widespread fermentation-based production of bioethanol from corn starch or sugarcane. However, competition for arable land with food production has led to the extensive investigation of lignocellulosic sources and waste products of the food industry as alternative sources of fermentable sugars. In particular, whey, a lactose-rich, inexpensive byproduct of dairy production, is available in stable, high quantities worldwide. This review summarizes strategies and specific factors essential for efficient lactose/whey fermentation to ethanol. In particular, we cover the most commonly used strains and approaches for developing high-performance strains that tolerate fermentation conditions. The relevant genes and regulatory systems controlling lactose utilization and sources of new genes are also discussed in detail. Moreover, this review covers the optimal conditions, various feedstocks that can be coupled with whey substrates, and enzyme supplements for increasing efficiency and yield. In addition to the historical advances in bioethanol production from whey, this review explores the future of yeast-based fermentation of lactose or whey products for beverage or fuel ethanol as a fertile research area for advanced, environmentally friendly uses of industrial waste products.
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da Silveira FA, de Oliveira Soares DL, Bang KW, Balbino TR, de Moura Ferreira MA, Diniz RHS, de Lima LA, Brandão MM, Villas-Bôas SG, da Silveira WB. Assessment of ethanol tolerance of Kluyveromyces marxianus CCT 7735 selected by adaptive laboratory evolution. Appl Microbiol Biotechnol 2020; 104:7483-7494. [DOI: 10.1007/s00253-020-10768-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 04/21/2020] [Accepted: 07/02/2020] [Indexed: 12/28/2022]
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Paiva LCD, Diniz RHS, Vidigal PMP, Mendes TADO, Santana MF, Cerdán ME, González-Siso MI, Silveira WBD. Genomic analysis and lactose transporter expression in Kluyveromyces marxianus CCT 7735. Fungal Biol 2019; 123:687-697. [PMID: 31416588 DOI: 10.1016/j.funbio.2019.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 05/21/2019] [Accepted: 06/03/2019] [Indexed: 01/20/2023]
Abstract
Kluyveromyces marxianus CCT 7735 has been used to produce ethanol, aromatic compounds, enzymes and heterologous proteins besides assimilates lactose as carbon source. Its genome has 10.7 Mb and encodes 4787 genes distributed in 8 nuclear chromosomes and one mitochondrial. Contrary to Kluyveromyces lactis, which has a unique LAC12 gene (encodes lactose permease), K. marxianus possesses four. The presence of degenerated copies and Solo-LTRs related to retrotransposon TKM close to the LAC12 genes in K. marxianus indicates ectopic recombinations. The Lac12 permeases of K. marxianus and K. lactis are conserved, however the conservation is higher between the copy of the left side of the chromosome three and the unique copy of K. lactis, indicating that this copy is the ancestor. The expression of the four LAC12 genes occurred in aerobiosis and hypoxia. Notably, the high lactose consumption in hypoxia seems to be related to the high expression of the LAC12 genes.
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Affiliation(s)
- Lílian Cardoso de Paiva
- Laboratory of Microbial Physiology, Department of Microbiology, Universidade Federal de Viçosa, Viçosa, MG, Brazil
| | - Raphael Hermano Santos Diniz
- Laboratory of Microbial Physiology, Department of Microbiology, Universidade Federal de Viçosa, Viçosa, MG, Brazil; Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais, Campus Ouro Preto, CODACIB, Ouro Preto, MG, Brazil
| | - Pedro Marcus Pereira Vidigal
- Center for Analysis of Biomolecules, Center for Biological and Health Sciences, Universidade Federal de Viçosa, Viçosa, MG, Brazil
| | | | - Mateus Ferreira Santana
- Laboratory of Microbial Physiology, Department of Microbiology, Universidade Federal de Viçosa, Viçosa, MG, Brazil
| | - María-Esperanza Cerdán
- Universidade da Coruña, Exprela Research Group, Facultade de Ciencias and CICA (Centro de Investigacións Científicas Avanzadas), A Coruña, Spain
| | - María-Isabel González-Siso
- Universidade da Coruña, Exprela Research Group, Facultade de Ciencias and CICA (Centro de Investigacións Científicas Avanzadas), A Coruña, Spain
| | - Wendel Batista da Silveira
- Laboratory of Microbial Physiology, Department of Microbiology, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
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Varela JA, Puricelli M, Montini N, Morrissey JP. Expansion and Diversification of MFS Transporters in Kluyveromyces marxianus. Front Microbiol 2019; 9:3330. [PMID: 30687296 PMCID: PMC6335341 DOI: 10.3389/fmicb.2018.03330] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 12/21/2018] [Indexed: 11/24/2022] Open
Abstract
In yeasts, proteins of the Major Superfamily Transporter selectively bind and allow the uptake of sugars to permit growth on varied substrates. The genome of brewer’s yeast, Saccharomyces cerevisiae, encodes multiple hexose transporters (Hxt) to transport glucose and other MFS proteins for maltose, galactose, and other monomers. For sugar uptake, the dairy yeast, Kluyveromyces lactis, uses Rag1p for glucose, Hgt1 for glucose and galactose, and Lac12 for lactose. In the related industrial species Kluyveromyces marxianus, there are four genes encoding Lac12-like proteins but only one of them, Lac12, can transport lactose. In this study, which initiated with efforts to investigate possible functions encoded by the additional LAC12 genes in K. marxianus, a genome-wide survey of putative MFS sugar transporters was performed. Unexpectedly, it was found that the KHT and the HGT genes are present as tandem arrays of five to six copies, with the precise number varying between isolates. Heterologous expression of individual genes in S. cerevisiae and mutagenesis of single and multiple genes in K. marxianus was performed to establish possible substrates for these transporters. The focus was on the sugar galactose since it was already reported in K. lactis that this hexose was a substrate for both Lac12 and Hgt1. It emerged that three of the four copies of Lac12, four Hgt-like proteins and one Kht-like protein have some capacity to transport galactose when expressed in S. cerevisiae and inactivation of all eight genes was required to completely abolish galactose uptake in K. marxianus. Analysis of the amino acid sequence of all known yeast galactose transporters failed to identify common residues that explain the selectivity for galactose. Instead, the capacity to transport galactose has arisen three different times in K. marxianus via polymorphisms in proteins that are probably ancestral glucose transporters. Although, this is analogous to S. cerevisiae, in which Gal2 is related to glucose transporters, there are not conserved amino acid changes, either with Gal2, or among the K. marxianus galactose transporters. The data highlight how gene duplication and functional diversification has provided K. marxianus with versatile capacity to utilise sugars for growth.
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Affiliation(s)
- Javier A Varela
- School of Microbiology, Centre for Synthetic Biology and Biotechnology, Environmental Research Institute, APC Microbiome Institute, University College Cork, Cork, Ireland
| | - Martina Puricelli
- School of Microbiology, Centre for Synthetic Biology and Biotechnology, Environmental Research Institute, APC Microbiome Institute, University College Cork, Cork, Ireland
| | - Noemi Montini
- School of Microbiology, Centre for Synthetic Biology and Biotechnology, Environmental Research Institute, APC Microbiome Institute, University College Cork, Cork, Ireland
| | - John P Morrissey
- School of Microbiology, Centre for Synthetic Biology and Biotechnology, Environmental Research Institute, APC Microbiome Institute, University College Cork, Cork, Ireland
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Alvim MCT, Vital CE, Barros E, Vieira NM, da Silveira FA, Balbino TR, Diniz RHS, Brito AF, Bazzolli DMS, de Oliveira Ramos HJ, da Silveira WB. Ethanol stress responses of Kluyveromyces marxianus CCT 7735 revealed by proteomic and metabolomic analyses. Antonie van Leeuwenhoek 2019; 112:827-845. [DOI: 10.1007/s10482-018-01214-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 12/10/2018] [Indexed: 10/27/2022]
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