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Roscini L, Favaro L, Corte L, Cagnin L, Colabella C, Basaglia M, Cardinali G, Casella S. A yeast metabolome-based model for an ecotoxicological approach in the management of lignocellulosic ethanol stillage. ROYAL SOCIETY OPEN SCIENCE 2019; 6:180718. [PMID: 30800340 PMCID: PMC6366221 DOI: 10.1098/rsos.180718] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 11/30/2018] [Indexed: 05/07/2023]
Abstract
Lignocellulosic bioethanol production results in huge amounts of stillage, a potentially polluting by-product. Stillage, rich in heavy metals and, mainly, inhibitors, requires specific toxicity studies to be adequately managed. To this purpose, we applied an FTIR ecotoxicological bioassay to evaluate the toxicity of lignocellulosic stillage. Two weak acids and furans, most frequently found in lignocellulosic stillage, have been tested in different mixtures against three Saccharomyces cerevisiae strains. The metabolomic reaction of the test microbes and the mortality induced at various levels of inhibitor concentration showed that the strains are representative of three different types of response. Furthermore, the relationship between concentrations and FTIR synthetic stress indexes has been studied, with the aim of defining a model able to predict the concentrations of inhibitors in stillage, resulting in an optimized predictive model for all the strains. This approach represents a promising tool to support the ecotoxicological management of lignocellulosic stillage.
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Affiliation(s)
- Luca Roscini
- Department of Pharmaceutical Sciences-Microbiology, CEMIN, Centre of Excellence on Nanostructured Innovative Materials, University of Perugia, Perugia, Italy
| | - Lorenzo Favaro
- Department of Agronomy Food Natural resources Animals and Environment (DAFNAE), University of Padova, Legnaro, Italy
- Author for correspondence: Lorenzo Favaro e-mail:
| | - Laura Corte
- Department of Pharmaceutical Sciences-Microbiology, CEMIN, Centre of Excellence on Nanostructured Innovative Materials, University of Perugia, Perugia, Italy
| | - Lorenzo Cagnin
- Department of Agronomy Food Natural resources Animals and Environment (DAFNAE), University of Padova, Legnaro, Italy
| | - Claudia Colabella
- Department of Pharmaceutical Sciences-Microbiology, CEMIN, Centre of Excellence on Nanostructured Innovative Materials, University of Perugia, Perugia, Italy
| | - Marina Basaglia
- Department of Agronomy Food Natural resources Animals and Environment (DAFNAE), University of Padova, Legnaro, Italy
| | - Gianluigi Cardinali
- Department of Pharmaceutical Sciences-Microbiology, CEMIN, Centre of Excellence on Nanostructured Innovative Materials, University of Perugia, Perugia, Italy
- Department of Chemistry, Biology and Biotechnology, CEMIN, Centre of Excellence on Nanostructured Innovative Materials, University of Perugia, Perugia, Italy
| | - Sergio Casella
- Department of Agronomy Food Natural resources Animals and Environment (DAFNAE), University of Padova, Legnaro, Italy
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McGregor I, Furlong S. Concurrent Alcohol Recovery and Fermentation Using Pass-Through Distillation. Ind Biotechnol (New Rochelle N Y) 2017. [DOI: 10.1089/ind.2017.29081.imc] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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