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Zhou J, Lv P, He B, Wu J, Wang G, Ma H, Wang Y, Chen G. Optimisation of the Ethanol Fermentation Process Using Hydrothermal Pretreatment of Cellulose Waste-Effect of Fermentation Pattern and Strain. Molecules 2024; 29:5266. [PMID: 39598655 PMCID: PMC11596119 DOI: 10.3390/molecules29225266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2024] [Revised: 10/29/2024] [Accepted: 11/01/2024] [Indexed: 11/29/2024] Open
Abstract
Suitable fermentation substrates and fermentation modes can effectively improve the fermentation ethanol yield. In this study, we optimised the hydrothermal pretreatment conditions by orthogonal optimisation using waste tissue paper as substrate. These conditions consisted of 50 min duration in a high-pressure reactor with pure water as solvent at a temperature of 160 °C. The biomass to water ratio was maintained at a constant level. The cellulose content of the pretreated TP was 81.19 ± 4.06%, which was an increase of 21.59% compared to the blank control. The 72 h reducing sugar yield of pretreated TP was 0.61 g sugar/g paper, which was 38.64% higher than that of untreated TP. Subsequently, the pretreated TP was fermented under optimal conditions. The mixed group of Saccharomyces cerevisiae and Candida shehatae (SC) showed a distributed saccharification fermentation pattern, with an ethanol yield of 28.11 g/L in 72 h. On the other hand, the single Saccharomyces cerevisiae (S) exhibited a homobloc saccharification fermentation pattern, with an ethanol yield of 35.15 g/L in 72 h.
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Affiliation(s)
- Jun Zhou
- School of Management, Changsha Medical University, Changsha 410219, China; (J.Z.); (B.H.); (J.W.); (G.W.)
| | - Pin Lv
- Department of Environmental Science and Engineering, University of Science and Technology Beijing, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing 100083, China; (P.L.); (Y.W.)
| | - Binsheng He
- School of Management, Changsha Medical University, Changsha 410219, China; (J.Z.); (B.H.); (J.W.); (G.W.)
| | - Jingjing Wu
- School of Management, Changsha Medical University, Changsha 410219, China; (J.Z.); (B.H.); (J.W.); (G.W.)
| | - Gao Wang
- School of Management, Changsha Medical University, Changsha 410219, China; (J.Z.); (B.H.); (J.W.); (G.W.)
| | - Hongzhi Ma
- Department of Environmental Science and Engineering, University of Science and Technology Beijing, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing 100083, China; (P.L.); (Y.W.)
- Xinjiang Key Laboratory of Clean Conversion and High Value Utilization of Biomass Resources, School of Resource and Environmental Science, Yili Normal University, Yining 835000, China
| | - Yueyao Wang
- Department of Environmental Science and Engineering, University of Science and Technology Beijing, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing 100083, China; (P.L.); (Y.W.)
| | - Guiyun Chen
- School of Management, Changsha Medical University, Changsha 410219, China; (J.Z.); (B.H.); (J.W.); (G.W.)
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Wang Z, Su C, Zhang Y, Shangguan S, Wang R, Su J. Key enzymes involved in the utilization of fatty acids by Saccharomyces cerevisiae: a review. Front Microbiol 2024; 14:1294182. [PMID: 38274755 PMCID: PMC10808364 DOI: 10.3389/fmicb.2023.1294182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 12/26/2023] [Indexed: 01/27/2024] Open
Abstract
Saccharomyces cerevisiae is a eukaryotic organism with a clear genetic background and mature gene operating system; in addition, it exhibits environmental tolerance. Therefore, S. cerevisiae is one of the most commonly used organisms for the synthesis of biological chemicals. The investigation of fatty acid catabolism in S. cerevisiae is crucial for the synthesis and accumulation of fatty acids and their derivatives, with β-oxidation being the predominant pathway responsible for fatty acid metabolism in this organism, occurring primarily within peroxisomes. The latest research has revealed distinct variations in β-oxidation among different fatty acids, primarily attributed to substrate preferences and disparities in the metabolic regulation of key enzymes involved in the S. cerevisiae fatty acid metabolic pathway. The synthesis of lipids, on the other hand, represents another crucial metabolic pathway for fatty acids. The present paper provides a comprehensive review of recent research on the key factors influencing the efficiency of fatty acid utilization, encompassing β-oxidation and lipid synthesis pathways. Additionally, we discuss various approaches for modifying β-oxidation to enhance the synthesis of fatty acids and their derivatives in S. cerevisiae, aiming to offer theoretical support and serve as a valuable reference for future studies.
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Affiliation(s)
- Zhaoyun Wang
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology, Jinan, Shandong, China
- Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Chunli Su
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology, Jinan, Shandong, China
- Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Yisang Zhang
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology, Jinan, Shandong, China
- Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Sifan Shangguan
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology, Jinan, Shandong, China
- Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Ruiming Wang
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology, Jinan, Shandong, China
- Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
| | - Jing Su
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology, Jinan, Shandong, China
- Key Laboratory of Shandong Microbial Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong, China
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