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Zhou K, Zhou Y, Zhou H, Cheng H, Xu G. Kinetic process of the biosorption of Cu(II), Ni(II) and Cr(VI) by waste Pichia pastoris cells. ENVIRONMENTAL TECHNOLOGY 2023; 44:1730-1750. [PMID: 34842065 DOI: 10.1080/09593330.2021.2012266] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 11/19/2021] [Indexed: 06/13/2023]
Abstract
Waste biomass of Pichia pastoris (P.pastoris) cells from the fermentation industry is an environmentally friendly biosorption material. The present study aimed to explore the biosorption behaviour of waste P.pastoris cells for Cu(II), Ni(II) and Cr(VI) in aqueous solution conditions. The results showed that the adsorption kinetics of three kinds of metals were well-fitted with lineared Elovich, pseudo-second-order kinetics models, non-linear kinetics and adsorption isotherms. The effective biosorption rates for Cu(II), Ni(II) and Cr(VI) removal were 71.3%, 59.7% and 16.25% respectively. The maximum Cu(II) adsorption capacity of waste P.pastoris was 40 mg/g at pH = 4 and 225 mg/L of solute concentration for 0.4 g biomass, better than that of the living yeasts. The pattern of Fourier transform infrared (FTIR) indicated that functional groups such as -NH, -OH, Si-O, P-O-C were involved in Cu(II) adsorption process. The analysis of SEM-EDS, XRD and TEM-EDS can be concluded that Cu(II) occupied Ca(II) binding sites by ion exchange mechanism to remove flocculation, and Cu(II) adsorbed onto the diatomite containing in the industrial waste P.pastoris. Thus the adsorption mechanism of the industrial waste P.pastoris was proposed taking Cu(II) as the example. And consecutive biosorption/desorption cycles were used for the evaluation of the regeneration efficiency, suggesting the good regeneration and reusability of waste P.pastoris.
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Affiliation(s)
- Kaiyan Zhou
- School of Minerals Processing and Bioengineering, Central South University, Changsha, People's Republic of China
| | - Yulu Zhou
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, People's Republic of China
| | - Hongbo Zhou
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, People's Republic of China
| | - Haina Cheng
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, People's Republic of China
| | - Gang Xu
- Hunan Flag Bio-Tech Co., Ltd., Changsha, People's Republic of China
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Fan M, Gu Z, Chen W, Wang H, Zhuang Y, Xia J. Micro-electrochemical DO sensor with ultra-micropore matrix fabricated with femtosecond laser processing successfully applied in on-line DO monitoring for yeast culture. Biotechnol Lett 2023; 45:449-461. [PMID: 36707453 DOI: 10.1007/s10529-023-03348-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 12/19/2022] [Accepted: 01/05/2023] [Indexed: 01/29/2023]
Abstract
Accurate monitoring of dissolved oxygen (DO) is vital for aerobic fermentation process control. This work presents an autoclavable Micro-Dissolved oxygen Sensor (MDS) that can monitor real time DO. The proposed sensor is much cheaper to be manufactured (< $35) and can be adapted to varying measurement environments. An ultra-micropore matrix was created using femtosecond laser processing technology to reduce flow dependency of probe signals. The validity of the proposed DO sensor was verified by testing it under different DO levels. The result revealed consistency between the new designed sensor and a commercial DO sensor. The obtained sensitivity was- 7.93 μA·L·mg-1 (MDS with ultra-micropore matrix). Moreover, the MDS can function without an oxygen-permeable membrane and a solid electrolyte was used which reduced the response time (4.6 s). For real-time monitoring, the stability of the MDS was validated during a yeast batch fermentation carried out until 18 h.
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Affiliation(s)
- Meng Fan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Zhen Gu
- Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China
| | - Wei Chen
- XXL-The Extreme Optoelectromechanics Laboratory, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, China
| | - HuiFeng Wang
- Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China
| | - YingPing Zhuang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Jianye Xia
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Science, Tianjin, 300308, China.
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Xu Y, Cao W, Cui J, Shen F, Luo J, Wan Y. Developing a sustainable process for the cleaner production of baker's yeast: An approach towards waste management by an integrated fermentation and membrane separation process. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 323:116197. [PMID: 36126591 DOI: 10.1016/j.jenvman.2022.116197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/25/2022] [Accepted: 09/04/2022] [Indexed: 06/15/2023]
Abstract
Baker's yeast industries generate highly polluted effluents, especially the cell free broth (i.e., vinasse) characterized by high chemical oxygen demand, nitrogen, and salts. In this work, it was found that the residual by-products (i.e., ethanol and acetic acid) and salts in the vinasse severely inhibited the cell growth, which hindered the reuse of the vinasse for the production of Saccharomyces cerevisiae. Through optimizing a suitable control strategy, the productions of ethanol and acetic acid were eliminated. Then, a nanofiltration membrane (i.e., NF5) was preferred for preliminarily and simultaneously separating and concentrating valuable molecules (i.e., invertase, food grade proteins and pigments) in the vinasse, and the main fouling mechanism was cake layer formation. Subsequently, a reverse osmosis membrane (RO) was suitable to separate and concentrate salts in the NF5 permeate, where the membrane fouling was negligible. Finally, the RO permeate was successfully reused for the production of S. cerevisiae. In addition, without calculating the benefit from the recovery of the valuable molecules, the cost of the integrated process can be decreased by 59.8% compared with the sole triple effect evaporation. Meanwhile, the volume of the fresh water used in the fermentation process can be decreased by 68.8%. Thus, it is a sustainable process for the cleaner production of baker's yeast using the integrated fermentation and membrane separation process.
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Affiliation(s)
- Yingying Xu
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, PR China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Weifeng Cao
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jiandong Cui
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, PR China.
| | - Fei Shen
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianqun Luo
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yinhua Wan
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
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Shen D, He X, Weng P, Liu Y, Wu Z. A review of yeast: High cell-density culture, molecular mechanisms of stress response and tolerance during fermentation. FEMS Yeast Res 2022; 22:6775076. [PMID: 36288242 DOI: 10.1093/femsyr/foac050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 09/21/2022] [Accepted: 10/22/2022] [Indexed: 01/07/2023] Open
Abstract
Yeast is widely used in the fermentation industry, and the major challenges in fermentation production system are high capital cost and low reaction rate. High cell-density culture is an effective method to increase the volumetric productivity of the fermentation process, thus making the fermentation process faster and more robust. During fermentation, yeast is subjected to various environmental stresses, including osmotic, ethanol, oxidation, and heat stress. To cope with these stresses, yeast cells need appropriate adaptive responses to acquire stress tolerances to prevent stress-induced cell damage. Since a single stressor can trigger multiple effects, both specific and nonspecific effects, general and specific stress responses are required to achieve comprehensive protection of cells. Since all these stresses disrupt protein structure, the upregulation of heat shock proteins and trehalose genes is induced when yeast cells are exposed to stress. A better understanding of the research status of yeast HCDC and its underlying response mechanism to various stresses during fermentation is essential for designing effective culture control strategies and improving the fermentation efficiency and stress resistance of yeast.
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Affiliation(s)
- Dongxu Shen
- Department of Food Science and Engineering, Ningbo University, Ningbo 315211, P.R. China
| | - Xiaoli He
- Department of Food Science and Engineering, Ningbo University, Ningbo 315211, P.R. China
| | - Peifang Weng
- Department of Food Science and Engineering, Ningbo University, Ningbo 315211, P.R. China
| | - Yanan Liu
- Department of Food Science and Engineering, Ningbo University, Ningbo 315211, P.R. China
| | - Zufang Wu
- Department of Food Science and Engineering, Ningbo University, Ningbo 315211, P.R. China
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Lv PJ, Qiang S, Liu L, Hu CY, Meng YH. Dissolved-oxygen feedback control fermentation for enhancing β-carotene in engineered Yarrowia lipolytica. Sci Rep 2020; 10:17114. [PMID: 33051539 PMCID: PMC7555900 DOI: 10.1038/s41598-020-74074-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/16/2020] [Indexed: 01/06/2023] Open
Abstract
The DO-stat fed-batch fermentation was carried out to explore the volumetric productivity of β-carotene in engineered Yarrowia lipolytica C11 strain. Using DO-stat fed-batch fermentation, we achieved 94 g/L biomass and 2.01 g/L β-carotene. Both biomass and β-carotene were about 1.28-fold higher than that in fed-batch fermentation. The ATP, NADP+/NADPH, and gene expression levels of tHMG, GGS1, carRA, and carB were promoted as compared to that in fed-batch fermentation. As for as the kinetic parameters in DO-stat fed-batch fermentation, μm', Yx/s', and Yp/s' was 0.527, 0.353, and 0.158, respectively. The μm' was elevated 4.66-fold than that in fed-batch fermentation. These data illustrate that more dissolved oxygen increased the biomass. The Yx/s' and Yp/s' were increased 1.15 and 22.57-fold, which suggest that the DO-stat fed-batch fermentation reduced the Crabtree effect and improved the utilization rate of glucose. Therefore, DO-stat fed-batch fermentation is a promising strategy in the industrialized production of β-carotene.
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Affiliation(s)
- Peng Jun Lv
- Engineering Research Center of High Value Utilization of Western China Fruit Resources, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Changan, Xian, 710119, P.R. China
| | - Shan Qiang
- Xian Healthful Biotechnology Co., Ltd., Hang Tuo Road, Changan, Xi'an, 710100, People's Republic of China
| | - Liang Liu
- Engineering Research Center of High Value Utilization of Western China Fruit Resources, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Changan, Xian, 710119, P.R. China
| | - Ching Yuan Hu
- Engineering Research Center of High Value Utilization of Western China Fruit Resources, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Changan, Xian, 710119, P.R. China
| | - Yong Hong Meng
- Engineering Research Center of High Value Utilization of Western China Fruit Resources, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Changan, Xian, 710119, P.R. China.
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