Batch Fermentative Biohydrogen Production Process Using Immobilized Anaerobic Sludge from Organic Solid Waste

Sekoai, Patrick T.; Yoro, Kelvin O.; Daramola, Michael O.

doi:10.3390/environments3040038

Cited by 28 publications

(15 citation statements)

References 35 publications

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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%

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%

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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“…The fermentation process was carried out for 12 h, with an initial medium of pH 6.0, as well as temperature and shaking speed at 60 • C and 120 rpm, respectively. The process was repeated periodically for two batches with different types of substrates [25,26]. The gas samples generated during the fermentation were collected when the biogas amount was consistently achieved.…”

Section: Batch Fermentation Of Biohydrogen Productionmentioning

confidence: 99%

“…Modified Gompertz was presented to correlate the cumulative hydrogen gas production using the Solver add-in in Excel. Theoretically, the Gompertz equation was modified [26]…”

Section: Analysis Of Gaseous Hydrogen Yield and Productivitymentioning

confidence: 99%

Effects of Alginate and Chitosan on Activated Carbon as Immobilisation Beads in Biohydrogen Production

et al. 2020

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In this study, the effects of alginate and chitosan as entrapped materials in the biofilm formation of microbial attachment on activated carbon was determined for biohydrogen production. Five different batch fermentations, consisting of mixed concentration alginate (Alg), were carried out in a bioreactor at temperature of 60 °C and pH 6.0, using granular activated carbon (GAC) as a primer for cell attachment and colonisation. It was found that the highest hydrogen production rate (HPR) of the GAC–Alg beads was 2.47 ± 0.47 mmol H2/l.h, and the H2 yield of 2.09 ± 0.22 mol H2/mol sugar was obtained at the ratio of 2 g/L of Alg concentration. Next, the effect of chitosan (C) as an external polymer layer of the GAC–Alg beads was investigated as an alternative approach to protecting the microbial population in the biofilm in a robust environment. The formation of GAC with Alg and chitosan (GAC–AlgC) beads gave the highest HPR of 0.93 ± 0.05 mmol H2/l.h, and H2 yield of 1.11 ± 0.35 mol H2/mol sugar was found at 2 g/L of C concentration. Hydrogen production using GAC-attached biofilm seems promising to achieve consistent HPRs at higher temperatures, using Alg as immobilised bead material, which has indicated a positive response in promoting the growth of hydrogen-producing bacteria and providing excellent conditions for microorganisms to grow and colonise high bacterial loads in a bioreactor.

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“…They have been hypothesized to have tremendous theoretical potential as a renewable fuel source [6,7]. The most prominent renewable biofuels from microalgae are methane produced by anaerobic digestion of algal biomass [8][9][10], biodiesel from microalgal oil [11][12][13][14][15][16][17][18], photobiologically produced biohydrogen [19][20][21][22], bioethanol [23] and pyrolytic bio-oil [24][25][26][27]. The production of renewable biofuels from algae is undeniably of considerable scientific interest; however, substantial technical barriers presently foil their commercial utilization.…”

Section: Introductionmentioning

confidence: 99%

Biodiesel from Saccharomyces cerevisiae: fuel property analysis and comparative economics

Phukan

Bora²,

Gogoi

et al. 2019

SN Appl. Sci.

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The depletion of exhaustible underground petroleum resources has put the present civilization at stake, thereby warranting intense research on non-exhaustible fuel. With this energy crisis hitting the block, microorganisms such as yeasts are gaining wider importance as potential biofuel candidates. An indigenous yeast strain Saccharomyces cerevisiae isolated from laboratory-scale brewing was investigated for biodiesel production. Biodiesel was produced by in situ transesterification approach using 1,1,3,3-tetramethylguanidine as the catalyst. The fuel properties such as viscosity, density, calorific value and cetane number (CN) were determined to assess the fuel quality of S. cerevisiae biodiesel. Additionally, the investigation also focuses on theoretical studies considering the yeast de-oiled cake (low-value biomass refuse). Fatty acid methyl ester analysis revealed that biodiesel was primarily composed of tricosylic acid (C23:0, 28.71%), palmitoleic acid (C16:1, 28.96%) and oleic acid (C18:1, 18.13%). Eicosapentaenoic acid (C20:5, 2.01%), one of the most commonly known polyunsaturated fatty acid, was present in the yeast strain. The CN of yeast biodiesel was 71.58, which was much higher than petro-diesel. The theoretical findings suggest the competitiveness of yeast biomass conversion technologies with petroleum refining process economics. The overall study warrants the feasibility of co-production of biodiesel from S. cerevisiae and cracked biofuel products (from S. cerevisiae de-oiled cake) under the aegis of biorefining applications.

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Batch Fermentative Biohydrogen Production Process Using Immobilized Anaerobic Sludge from Organic Solid Waste

Cited by 28 publications

References 35 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

Effects of Alginate and Chitosan on Activated Carbon as Immobilisation Beads in Biohydrogen Production

Biodiesel from Saccharomyces cerevisiae: fuel property analysis and comparative economics

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Batch Fermentative Biohydrogen Production Process Using Immobilized Anaerobic Sludge from Organic Solid Waste

Cited by 28 publications

References 35 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

Effects of Alginate and Chitosan on Activated Carbon as Immobilisation Beads in Biohydrogen Production

Biodiesel from Saccharomyces cerevisiae: fuel property analysis and comparative economics

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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