Fermentative Biohydrogen Modelling and Optimization Research in Light of Miniaturized Parallel Bioreactors

Sekoai, Patrick T.; Kana, E.B. Gueguim

doi:10.5504/bbeq.2013.0046

Cited by 12 publications

(4 citation statements)

References 83 publications

(61 reference statements)

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“… 9 , 10 Hydrogen is viewed as a clean energy carrier because of its carbon-free structure and the fact that it can be produced from any renewable energy resource. 11 , 12 Nonetheless, its application has been hampered due to storage and transportation challenges. 13 , 14 To circumvent these barriers, H 2 is used alongside CO 2 to produce CH 4 via the Sabatier reaction ( eq 1 ).…”

Section: Introductionmentioning

confidence: 99%

“…One attractive method of exploiting the surplus electricity from renewable sources is to split water into H 2 and O 2 (power-to-gas). , Hydrogen is viewed as a clean energy carrier because of its carbon-free structure and the fact that it can be produced from any renewable energy resource. , Nonetheless, its application has been hampered due to storage and transportation challenges. , To circumvent these barriers, H 2 is used alongside CO 2 to produce CH 4 via the Sabatier reaction (eq ). This process is known as the power-to-methane (PtM) concept .…”

Section: Introductionmentioning

confidence: 99%

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Thermophilic Biogas Upgrading via ex Situ Addition of H₂ and CO₂ Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste

et al. 2020

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Bioconversion of renewable H 2 and waste CO 2 using methanogenic archaea is a promising technology for obtaining high-purity CH 4 , which can serve as an alternative for natural gas. This process is known as ex situ biogas upgrading. This work highlights the pathway toward the bioconversion of renewable H 2 and CO 2 into high-purity biomethane by exploiting highly accessible agro-municipal residues: cow manure (CM) and the organic fraction of solid municipal waste (OFSMW), which used to be called “waste materials”. More specifically, an ex situ thermophilic (55 °C) biogas upgrading process was conducted by CM and OFSMW codigestion at different mass proportions: 100:0, 80:20, 70:30, 60:40, and 50:50. Maximum CH 4 concentrations of 92–97 vol % and biogas volumetric production rates of 4954–6605 NmL/L.d were obtained from a batch reactor of 3 L working volume. Feedstock characterization, pH monitoring, and the carbon-to-nitrogen ratio were critical parameters to evaluate during biogas upgrading experiments. In this work, the usefulness of agro-municipal substrates is highlighted by producing high-purity biomethane—an energetic chemical to facilitate renewable energy conversion, which supports various end-use applications. This process therefore provides a solution to renewable energy storage challenges and future sustainable and green energy supply.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermophilic Biogas Upgrading via ex Situ Addition of H₂ and CO₂ Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste

et al. 2020

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“…It is therefore vital for a H 2 driven-economy to make environmental and economic sense [19]. Hydrogen from waste biomass represents an economical and environmentally-friendly approach because this process uses diverse feedstocks [20][21][22][23]. Amongst the H 2 bioprocesses, DF is considered as the most promising clean technology of the 21st century because it can valorise diverse feedstocks including waste materials under mild fermentation conditions [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Revising the dark fermentative H2 research and development scenario – An overview of the recent advances and emerging technological approaches

Sekoai

Daramola

Mogwase

et al. 2020

Biomass and Bioenergy

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The indiscriminate use of fossil fuels has led to several challenges such as greenhouse gas emissions, environmental degradation, and energy security. Establishment of clean fuels is at the forefront of science and innovation in today's society to curb these problems. Dark fermentation (DF) is widely regarded as the most promising clean energy technology of the 21st century due to its desirable properties such as high energy content, its non-polluting features, its ability to use a broad spectrum of feedstocks and inoculum sources, as well as its ability to use mild fermentation conditions. In developing nations, this technology could be instrumental in establishing effective waste disposal systems while boosting the production of clean fuels. However, DF is still hindered by the low yields which stagnate its commercialization. This paper reviews the recent and emerging technologies that are gaining prominence in DF based on information that has been gathered from recent scientific publications. Herein, novel enhancement methods such as cell immobilization, nanotechnology, mathematical optimization tools, and technologies for biogas upgrading using renewable H 2 are comprehensively discussed. Furthermore, a section which discusses the potential of bioenergy in Sub-Saharan Africa including South Africa is included. Finally, scientific areas that need further research and development in DF process are also presented.

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“…Obtaining high yields is still a major challenge in dark fermentation processes [4]. The experimental yields are lower than the theoretical yields due to the presence of biohydrogen-competing pathways that lowers the overall efficiency.…”

Section: Introductionmentioning

confidence: 99%

Microbial cell immobilization in biohydrogen production: a short overview

Sekoai

Awosusi

Yoro

et al. 2017

Critical Reviews in Biotechnology

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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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Fermentative Biohydrogen Modelling and Optimization Research in Light of Miniaturized Parallel Bioreactors

Cited by 12 publications

References 83 publications

Thermophilic Biogas Upgrading via ex Situ Addition of H₂ and CO₂ Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste

Thermophilic Biogas Upgrading via ex Situ Addition of H₂ and CO₂ Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste

Revising the dark fermentative H2 research and development scenario – An overview of the recent advances and emerging technological approaches

Microbial cell immobilization in biohydrogen production: a short overview

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Fermentative Biohydrogen Modelling and Optimization Research in Light of Miniaturized Parallel Bioreactors

Cited by 12 publications

References 83 publications

Thermophilic Biogas Upgrading via ex Situ Addition of H2 and CO2 Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste

Thermophilic Biogas Upgrading via ex Situ Addition of H2 and CO2 Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste

Revising the dark fermentative H2 research and development scenario – An overview of the recent advances and emerging technological approaches

Microbial cell immobilization in biohydrogen production: a short overview

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Resources

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Thermophilic Biogas Upgrading via ex Situ Addition of H₂ and CO₂ Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste

Thermophilic Biogas Upgrading via ex Situ Addition of H₂ and CO₂ Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste