| 1. |
- Bajracharya, Suman, et al.
(författare)
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Chapter 12 - Advances in gas fermentation processes
- 2022
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Ingår i: Current Developments in Biotechnology and Bioengineering. - : Elsevier. - 9780323911672 ; , s. 321-351
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Microbial metabolism enables the sustainable synthesis of fuels and chemicals from gaseous substrates (H2, CO, and CO2), thus drastically diminishing the carbon load in the atmosphere. Various value-added biochemicals and biofuels, such as acetate, methane, ethanol, butanol, butyrate, caproate, and bioplastics, have been produced during the conversion of syngas or H2/CO2, using a variety of microorganisms as biocatalysts. Gas fermentation processes using acetogenic and methanogenic organisms are being extensively investigated. This chapter provides an overview of microbial CO and CO2 conversion technology, with an emphasis on recent developments and integration with renewable electricity for the generation of H2 or other forms of electron donors. A discussion on technological challenges in gas fermentation addresses issues, such as poor mass transfer, low microbial biomass, and low productivity. It also presents possible solutions based on the latest advances in bioelectrochemical processes including microbial gas electrofermentation. Finally, the chapter includes a sustainability analysis of the process and includes a brief update on commercially established companies operating gas fermentation systems. Overall, an integrated approach combining gas fermentation and renewable electricity offers an opportunity for the development of CO and CO2- based biochemical and biofuel production at commercial scale.
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| 2. |
- Sar, Taner, Postdoctor, 1989-, et al.
(författare)
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Media preparation and sterilization in bioprocesses
- 2022
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Ingår i: Advances in Bioprocess Engineering. - : Elsevier. - 9780323911672 - 9780323984836 ; , s. 399-430
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Fermentation and bioprocesses in which various metabolites from food to pharmaceutics are produced are constantly evolving. This section is devoted to contamination risks and their eliminations, media preparation, decontamination, and sterilization methods for such processes. For contamination, sources of microbial contaminations and decontamination (physical and chemical) practices are discussed. In addition, sterilization methods (heat, filtration, chemical, and radiation) that are applied for the removal of microorganisms from small-scale to large-scale instruments, gases, and liquids are explained. In the preparation of the media, the batching area, developed equipment, and methods for large-scale reactors are mentioned. In summary, the preparation and sterilization of the media in bioprocesses from laboratory-scale reactors to industrial-scale reactors are evaluated.
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| 3. |
- Sirohi, R., et al.
(författare)
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Preface
- 2022
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Ingår i: Advances in Bioprocess Engineering. - : Elsevier. - 9780323911672 ; , s. xv-xvi
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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