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Sekoai PT, Awosusi AA, Yoro KO, Singo M, Oloye O, Ayeni AO, Bodunrin M, Daramola MO. Microbial cell immobilization in biohydrogen production: a short overview. Crit Rev Biotechnol 2017; 38:157-171. [PMID: 28391705 DOI: 10.1080/07388551.2017.1312274] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The high dependence on fossil fuels has escalated the challenges of greenhouse gas emissions and energy security. Biohydrogen is projected as a future alternative energy as a result of its non-polluting characteristics, high energy content (122 kJ/g), and economic feasibility. However, its industrial production has been hampered by several constraints such as low process yields and the formation of biohydrogen-competing reactions. This necessitates the search for other novel strategies to overcome this problem. Cell immobilization technology has been in existence for many decades and is widely used in various processes such as wastewater treatment, food technology, and pharmaceutical industry. In recent years, this technology has caught the attention of many researchers within the biohydrogen production field owing to its merits such as enhanced process yields, reduced microbial contamination, and improved homogeneity. In addition, the use of immobilization in biohydrogen production prevents washout of microbes, stabilizes the pH of the medium, and extends microbial activity during continuous processes. In this short review, an insight into the potential of cell immobilization is presented. A few immobilization techniques such as entrapment, adsorption, encapsulation, and synthetic polymers are discussed. In addition, the effects of process conditions on the performance of immobilized microbial cells during biohydrogen production are discussed. Finally, the review concludes with suggestions on improvement of cell immobilization technologies in biohydrogen production.
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Affiliation(s)
- Patrick Thabang Sekoai
- a School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment , University of the Witwatersrand , Johannesburg , South Africa
| | - Ayotunde A Awosusi
- a School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment , University of the Witwatersrand , Johannesburg , South Africa
| | - Kelvin Odafe Yoro
- a School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment , University of the Witwatersrand , Johannesburg , South Africa
| | - Muofhe Singo
- a School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment , University of the Witwatersrand , Johannesburg , South Africa
| | - Olawale Oloye
- a School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment , University of the Witwatersrand , Johannesburg , South Africa
| | - Augustine Omoniyi Ayeni
- a School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment , University of the Witwatersrand , Johannesburg , South Africa.,b Department of Chemical Engineering, College of Engineering , Covenant University , Ota , Ogun State , Nigeria
| | - Michael Bodunrin
- a School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment , University of the Witwatersrand , Johannesburg , South Africa.,c Department of Metallurgical and Materials Engineering , Federal university of Technology , Akure , Ondo State , Nigeria
| | - Michael Olawale Daramola
- a School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment , University of the Witwatersrand , Johannesburg , South Africa
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Kumar G, Mudhoo A, Sivagurunathan P, Nagarajan D, Ghimire A, Lay CH, Lin CY, Lee DJ, Chang JS. Recent insights into the cell immobilization technology applied for dark fermentative hydrogen production. Bioresour Technol 2016; 219:725-737. [PMID: 27561626 DOI: 10.1016/j.biortech.2016.08.065] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 08/14/2016] [Accepted: 08/16/2016] [Indexed: 05/07/2023]
Abstract
The contribution and insights of the immobilization technology in the recent years with regards to the generation of (bio)hydrogen via dark fermentation have been reviewed. The types of immobilization practices, such as entrapment, encapsulation and adsorption, are discussed. Materials and carriers used for cell immobilization are also comprehensively surveyed. New development of nano-based immobilization and nano-materials has been highlighted pertaining to the specific subject of this review. The microorganisms and the type of carbon sources applied in the dark hydrogen fermentation are also discussed and summarized. In addition, the essential components of process operation and reactor configuration using immobilized microbial cultures in the design of varieties of bioreactors (such as fixed bed reactor, CSTR and UASB) are spotlighted. Finally, suggestions and future directions of this field are provided to assist the development of efficient, economical and sustainable hydrogen production technologies.
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Affiliation(s)
- Gopalakrishnan Kumar
- Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environmental and Labor Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam; Center for Materials Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - Ackmez Mudhoo
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Mauritius, Reduit 80837, Mauritius
| | - Periyasamy Sivagurunathan
- Center for Materials Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - Dillirani Nagarajan
- Department of Chemical Engineering, National Cheng-Kung University, Tainan, Taiwan; Research Center for Energy Technology and Strategy, National Cheng-Kung University, Tainan, Taiwan
| | - Anish Ghimire
- Department of Environmental Science and Engineering, Kathmandu University, P.O. Box 6250, Kathmandu, Nepal
| | - Chyi-How Lay
- Green Energy Development Centre (GEDC), Feng Chia University, Taichung, Taiwan
| | - Chiu-Yue Lin
- Green Energy Development Centre (GEDC), Feng Chia University, Taichung, Taiwan
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
| | - Jo-Shu Chang
- Department of Chemical Engineering, National Cheng-Kung University, Tainan, Taiwan; Research Center for Energy Technology and Strategy, National Cheng-Kung University, Tainan, Taiwan; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan.
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