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Wei Q, Yuan T, Li Z, Zhao D, Wang C, Yang G, Tang W, Ma X. Investigating cultivation strategies for enhancing protein content in Auxenochlorella pyrenoidosa FACHB-5. BIORESOURCE TECHNOLOGY 2024; 402:130828. [PMID: 38734260 DOI: 10.1016/j.biortech.2024.130828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/07/2024] [Accepted: 05/08/2024] [Indexed: 05/13/2024]
Abstract
This study investigated the influence of yeast extract addition, carbon source, and photoperiod on the growth dynamics of Auxenochlorella pyrenoidosa FACHB-5. Employing response surface methodology, the culture strategy was optimized, resulting in the following optimal conditions: yeast extract addition at 0.75 g L-1, glucose concentration of 0.83 g L-1, and a photoperiod set at Light: Dark = 18 h: 6 h. Under these conditions, the biomass reached 1.76 g L-1 with a protein content of 750.00 g L-1, containing 40 % of essential amino acids, representing a 1.52-fold increase. Proteomic analysis revealed that the targeted cultivation strategy up-regulated genes involved in microalgal protein synthesis. The combined effect of yeast extract and glucose enhanced both the glutamine synthetase-glutamate synthetase mechanism and the free amino acid content.
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Affiliation(s)
- Qun Wei
- School of Resources, Environment and Materials, Guangxi University, No. 100 Daxue Road, Nanning, Guangxi 530004, China; Key Laboratory of Environmental Protection (Guangxi University), Education Department of Guangxi Zhuang Autonomous Region, Guangxi Nanning 530004, China; Guangxi Key Laboratory of Emerging Contaminants Monitoring, Early Warning and Environmental Health Risk Assessment
| | - Ting Yuan
- School of Resources, Environment and Materials, Guangxi University, No. 100 Daxue Road, Nanning, Guangxi 530004, China
| | - Zhuang Li
- School of Resources, Environment and Materials, Guangxi University, No. 100 Daxue Road, Nanning, Guangxi 530004, China
| | - Dan Zhao
- School of Resources, Environment and Materials, Guangxi University, No. 100 Daxue Road, Nanning, Guangxi 530004, China
| | - Canmei Wang
- School of Resources, Environment and Materials, Guangxi University, No. 100 Daxue Road, Nanning, Guangxi 530004, China
| | - Gairen Yang
- Forestry College of Guangxi University, Guangxi Key Laboratory of Forest Ecology and Conservation, Guangxi University, No. 100 Daxue Road, Nanning 530004, PR China
| | - Wangwang Tang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
| | - Xiangmeng Ma
- School of Resources, Environment and Materials, Guangxi University, No. 100 Daxue Road, Nanning, Guangxi 530004, China; Key Laboratory of Environmental Protection (Guangxi University), Education Department of Guangxi Zhuang Autonomous Region, Guangxi Nanning 530004, China; Guangxi Key Laboratory of Emerging Contaminants Monitoring, Early Warning and Environmental Health Risk Assessment.
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Liu Z, Hao N, Hou Y, Wang Q, Liu Q, Yan S, Chen F, Zhao L. Technologies for harvesting the microalgae for industrial applications: Current trends and perspectives. BIORESOURCE TECHNOLOGY 2023; 387:129631. [PMID: 37544545 DOI: 10.1016/j.biortech.2023.129631] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/08/2023]
Abstract
Microalgae are emerging as a promising source for augmenting the supply of essential products to meet global demands in an environmentally sustainable manner. Despite the potential benefits of microalgae in industry, the high energy consumption for harvesting remains a significant obstacle. This review offers a comprehensive overview of microalgae harvesting technologies and their industrial applications, with particular emphasis on the latest advances in flocculation techniques. These cutting-edge methods have been applied to biodiesel production, food and nutraceutical processing, and wastewater treatment. Large-scale harvesting is still severely impeded by the high cost despite progress has been made in laboratory studies. In the future, cost-effective microalgal harvesting will rely on efficient resource utilization, including the use of waste materials and the reuse of media and flocculants. Additionally, precise regulation of biological metabolism will be necessary to overcome algal species-related limitations through the development of extracellular polymeric substance-induced flocculation technology.
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Affiliation(s)
- Zhiyong Liu
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China
| | - Nahui Hao
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China; College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Yuyong Hou
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China
| | - Qing Wang
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China
| | - Qingling Liu
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China; College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Suihao Yan
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China; College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Fangjian Chen
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China
| | - Lei Zhao
- Key Laboratory of Engineering Biology for Low-carbon Manufacturing, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China; National Center of Technology Innovation for Synthetic Biology, Tianjin, China.
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Bisht B, Verma M, Sharma R, Chauhan P, Pant K, Kim H, Vlaskin MS, Kumar V. Development of yeast and microalgae consortium biofilm growth system for biofuel production. Heliyon 2023; 9:e19353. [PMID: 37662773 PMCID: PMC10472003 DOI: 10.1016/j.heliyon.2023.e19353] [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: 02/25/2023] [Revised: 08/09/2023] [Accepted: 08/20/2023] [Indexed: 09/05/2023] Open
Abstract
Background The current study aimed to develop a laboratory-scale biofilm photobioreactor system for biofuel production. Scope & Approach During the investigation, Jute was discovered to be the best, cheap, hairy, open-pored supporting material for biofilm formation. Microalgae & yeast consortium was used in this study for biofilm formation. Conclusion The study identified microalgae and yeast consortium as a promising choice and ideal partners for biofilm formation with the highest biomass yield (47.63 ± 0.93 g/m2), biomass productivity (4.39 ± 0.29 to 7.77 ± 0.05 g/m2/day) and lipid content (36%) over 28 days cultivation period, resulting in a more sustainable and environmentally benign fuel that could become a reality in the near future.
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Affiliation(s)
- Bhawna Bisht
- Algal Research and Bioenergy Laboratory, Department of Food Science and Technology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand, 248002, India
| | - Monu Verma
- Algal Research and Bioenergy Laboratory, Department of Food Science and Technology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand, 248002, India
- Water-Energy Nexus Laboratory, Department of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea
| | - Rohit Sharma
- Department of Biotechnology Engineering, University Institute of Engineering, Chandigarh University, Chandigarh, India
| | - P.K. Chauhan
- Faculty of Applied Sciences and Biotechnology, Shoolini University, Solan, 173229, HP, India
| | - Kumud Pant
- Department of Biotechnology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand, 248002, India
| | - Hyunook Kim
- Water-Energy Nexus Laboratory, Department of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea
| | - Mikhail S. Vlaskin
- Joint Institute for High Temperatures of the Russian Academy of Sciences, 13/2 Izhorskaya St, Moscow, 125412, Russian Federation
| | - Vinod Kumar
- Algal Research and Bioenergy Laboratory, Department of Food Science and Technology, Graphic Era (Deemed to be University), Dehradun, Uttarakhand, 248002, India
- Peoples’ Friendship University of Russia (RUDN University), Moscow, 117198, Russian Federation
- Graphic Era Hill University, Dehradun, Uttarakhand 248002, India
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Bisht B, Jaiswal KK, Parveen A, Kumar S, Verma M, Kim H, Vlaskin MS, Singh N, Kumar V. A phyco-nanobionics biohybrid system for increased carotenoid accumulation in C. sorokiniana UUIND6. J Mater Chem B 2023; 11:7466-7477. [PMID: 37449368 DOI: 10.1039/d3tb00960b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Recent advancements in "phyco-nanobionics" have sparked considerable interest in the ability of microalgae to synthesize high-value natural bioactive compounds such as carotenoid pigments, which have been highlighted as an emergent and vital bioactive compound from both industrial and scientific perspectives. Such bioactive compounds are often synthesized by either altering the biogenetic processes existing in living microorganisms or using synthetic techniques derived from petroleum-based chemical sources. A bio-hybrid light-driven cell factory system was established herein by using harmful macroalgal bloom extract (HMBE) and efficient light-harvesting silver nanoparticles (AgNPs) to synthesize HMBE-AgNPs and integrating the synthesized HMBE-AgNPs in various concentrations (1, 2.5, 5 and 10 ppm) into the microalgae C. sorokiniana UUIND6 to improve the overall solar-to-chemical conversion efficiency in carotenoid pigment synthesis in microalgae. The current study findings found high biocompatibility of 5 ppm HMBE-AgNP concentration that can serve as a built-in photo-sensitizer and significantly improve ROS levels in microalgae (6.75 ± 0.25 μmol H2O2 g-1), thus elevating total photosynthesis resulting in a two-fold increase in carotenoids (457.5 ± 2.5 μg mL-1) over the native microalgae without compromising biomass yield. NMR spectroscopy was additionally applied to acquire a better understanding of pure carotenoids derived from microalgae, which indicated similar peaks in both spectra when compared to β-carotene. Thus, this well-planned bio-hybrid system offers a potential option for the cost-effective and long-term supply of these natural carotenoid bio-products.
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Affiliation(s)
- Bhawna Bisht
- Algal Research and Bioenergy Laboratory, Department of Food Science and Technology, Graphic Era (Deemed to be) University, Dehradun, Uttarakhand, 248002, India
| | - Krishna Kumar Jaiswal
- Bioprocess Engineering Laboratory, Department of Green Energy Technology, Pondicherry University, Puducherry, 605014, India
| | - Afreen Parveen
- Algal Research and Bioenergy Laboratory, Department of Food Science and Technology, Graphic Era (Deemed to be) University, Dehradun, Uttarakhand, 248002, India
| | - Sanjay Kumar
- Algal Research and Bioenergy Laboratory, Department of Food Science and Technology, Graphic Era (Deemed to be) University, Dehradun, Uttarakhand, 248002, India
| | - Monu Verma
- Water-Energy Nexus Laboratory, Department of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea
| | - Hyunook Kim
- Water-Energy Nexus Laboratory, Department of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea
| | - Mikhail S Vlaskin
- Joint Institute for High Temperatures of the Russian Academy of Sciences, Moscow, 117198, Russian Federation
| | - Narpinder Singh
- Algal Research and Bioenergy Laboratory, Department of Food Science and Technology, Graphic Era (Deemed to be) University, Dehradun, Uttarakhand, 248002, India
| | - Vinod Kumar
- Algal Research and Bioenergy Laboratory, Department of Food Science and Technology, Graphic Era (Deemed to be) University, Dehradun, Uttarakhand, 248002, India
- Peoples' Friendship University of Russia (RUDN University), Moscow, 117198, Russian Federation.
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Hou D, Xu X, Wang J, Liu C, Niu C, Zheng F, Li Q. Effect of environmental stresses during fermentation on brewing yeast and exploration on the novel flocculation-associated function of RIM15 gene. BIORESOURCE TECHNOLOGY 2023; 379:129004. [PMID: 37004888 DOI: 10.1016/j.biortech.2023.129004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/28/2023] [Accepted: 03/30/2023] [Indexed: 05/03/2023]
Abstract
Flocculation of brewer's yeast is an environment-friendly and cost-effective way to separate yeast cells from fermentation broth for subsequent production. Diverse genetic background and complex fermentation environment cause difficulty to explore flocculation mechanism and regulate yeast flocculation. In this study, comparative transcriptome analysis was carried out between an industrial brewing yeast and its flocculation-enhanced mutant strain, unveiling the differentially-expressed genes were enriched in response to stresses. The expression level of Lg-FLO1 was the highest among all FLO genes. Environmental stresses of fermentation were simulated to stimulated yeast cells and it was found that nitrogen and amino acid starvation promoted the process of flocculation. It is the first time to reveal the nutrient-responsive gene RIM15 has a novel genetic function regulating flocculation. The study provides novel direction and strategies to manage yeast flocculation and achieve effective cell utilization in fermentation.
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Affiliation(s)
- Dan Hou
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Xin Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.
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Xu P, Li J, Qian J, Wang B, Liu J, Xu R, Chen P, Zhou W. Recent advances in CO 2 fixation by microalgae and its potential contribution to carbon neutrality. CHEMOSPHERE 2023; 319:137987. [PMID: 36720412 DOI: 10.1016/j.chemosphere.2023.137987] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/10/2023] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
Many countries and regions have set their schedules to achieve the carbon neutrality between 2030 and 2070. Microalgae are capable of efficiently fixing CO2 and simultaneously producing biomass for multiple applications, which is considered one of the most promising pathways for carbon capture and utilization. This work reviews the current research on microalgae CO2 fixation technologies and the challenges faced by the related industries and government agencies. The technoeconomic analysis indicates that cultivation is the major cost factor. Use of waste resources such as wastewater and flue gas can significantly reduce the costs and carbon footprints. The life cycle assessment has identified fossil-based electricity use as the major contributor to the global warming potential of microalgae-based CO2 fixation approach. Substantial efforts and investments are needed to identify and bridge the gaps among the microalgae strain development, cultivation conditions and systems, and use of renewable resources and energy.
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Affiliation(s)
- Peilun Xu
- School of Resources and Environment, And Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China
| | - Jun Li
- School of Resources and Environment, And Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China
| | - Jun Qian
- School of Resources and Environment, And Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China
| | - Bang Wang
- School of Resources and Environment, And Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China
| | - Jin Liu
- Laboratory for Algae Biotechnology and Innovation, College of Engineering, Peking University, Beijing, 100871, China
| | - Rui Xu
- Jiangxi Ganneng Co., Ltd., Nanchang, 330096, China
| | - Paul Chen
- Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Avenue, St. Paul, MN, 55108, USA.
| | - Wenguang Zhou
- School of Resources and Environment, And Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China.
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Hao N, Liu Z, Hou Y, Fan Z, Li Y, Chen F, Zhao L. Small peptide glutathione-induced bioflocculation for enhancing the food application potential of Chlorella pyrenoidosa. BIORESOURCE TECHNOLOGY 2022; 365:128138. [PMID: 36252754 DOI: 10.1016/j.biortech.2022.128138] [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: 09/30/2022] [Revised: 10/10/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Existing flocculants are used to enhance the harvesting efficiency of microalgae; however, harvesting biomass containing residues is unsuitable for food applications. In this study, a small peptide-induced bioflocculation technique was developed for harvesting microalgae, and the biomass was free of impurities. After seven days of cultivation with glutathione, 72 % flocculation efficiency of Chlorella pyrenoidosa was achieved after settling for 1 h. The nutrient composition of flocs depicted a higher protein (68.94 mg/L) and lipid (48.97 mg/L) content than those of the control (65.91 and 41.44 mg/L). The amino acid profiles of flocs showed the presence of more essential amino acids than in untreated cells. More omega polyunsaturated fatty acids, such as ω-3 and ω-9, accumulate in flocs. Extracellular polymeric substances, which induced bioflocculation, appeared markedly in flocs (150.02 mg/L) compared to the control (32.30 mg/L). This study provides novel insights into the residue-free algal harvesting method and obtained nutrition-enriched biomass.
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Affiliation(s)
- Nahui Hao
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Zhiyong Liu
- Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China
| | - Yuyong Hou
- Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China
| | - Zhihua Fan
- College of Food Science and Biological Engineering, Tianjin Agricultural University, Tianjin 300384, China
| | - Yu Li
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Fangjian Chen
- Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China.
| | - Lei Zhao
- Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China; National Center of Technology Innovation for Synthetic Biology, Tianjin 300308, China
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