Maximizing biogas production from leftover injera: influence of yeast addition to anaerobic digestion system
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Venkatesa Prabhu Sundramurthy
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Subramanian Manoharan
Abstract
Injera is a staple food in Ethiopian dine. This study aimed to investigate on leftover injera (LI) for producing biogas via anaerobic digestion (AD), while leftover injera is full of easily biodegradable components. Aiming to examine the impact of yeast addition on biogas production efficiency, it was found that the addition of 2 % volatile solids (VS) of stimulated yeast, daily biogas output increased by 520 and 550 ml after 12 and 37 days of anaerobic digestion, respectively, with rather steady biogas production. The rate at which gas production increased was drastically cut in half when yeast was left out of the control group. Biogas production increased by only 60 ml despite the addition of two portions of substrate and yeast. Biogas output in the yeast group after fermentation was also up 33.2 % compared to the control group. The yeast group’s anaerobic digesting system was more stable, as determined by the study of markers including volatile organic acids, alkalinity, and propionic acid. The findings can be used as a benchmark for future trials aiming to industrialise continuous anaerobic digestion, allowing for more flexible response to feed as waste LI as organic load.
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Research funding: None declared.
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Data availability: The data used to support the findings of this study are included in the article. Should further data or information be required, these are available from the corresponding author upon request.
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© 2024 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Contributions to “Materials for solar water splitting”
- Synergistic enhancement of electrochemical supercapacitor efficiency via Co3O4/GO composite electrode
- Impact of annealing temperature on the structural, morphological and optical properties of Ni doped ZnO nanostructured thin films synthesized by sol–gel methodology
- Comparison of different iron oxides for degradation of tetracycline anti-bacterial drug
- Structural and electrical properties of mol% (100 − x)Li2SO4:xP2O5 solid electrolyte system (0 ≤ x ≤ 20)
- Microwave synthesis of magnesium phosphate-rGO as an effective electrode for supercapacitor application
- Adsorptive removal of Cu(II) ions from aqueous solution using Teff (Eragrostis tef) hay based magnetized biocarbon: RSM-GA, ANN based optimization and kinetics aspects
- Efficiency assessment of hydrothermally synthesized Mn2+/3+ modified LaCoO3 nanoparticles for advanced wastewater remediation
- Synthesis of BaO/NiO/rGO nanocomposite for supercapacitor application
- Ethanedithiol-modified silica nanoparticles for selective removal of Hg2+ ions from aqueous wastewater
- Effect of Zr substitution on photocatalytic and magnetic properties of lanthanum titanate
- Investigations on the microbial activity and anti-corrosive efficiency of nickel oxide nanoparticles synthesised through green route
- Multifunctional application of different iron oxide nanoparticles
- Effect of pH in the bismuth vanadate nanorods for their supercapacitor applications
- Maximizing biogas production from leftover injera: influence of yeast addition to anaerobic digestion system
- Synthesis, characterization and efficient photo-catalytic performance of methylene blue by Zn doped SnO2 nanoparticles
- Enhancing performance: insights into the augmentation potential of acrylonitrile butadiene styrene/boron nitride composites
Artikel in diesem Heft
- Frontmatter
- Contributions to “Materials for solar water splitting”
- Synergistic enhancement of electrochemical supercapacitor efficiency via Co3O4/GO composite electrode
- Impact of annealing temperature on the structural, morphological and optical properties of Ni doped ZnO nanostructured thin films synthesized by sol–gel methodology
- Comparison of different iron oxides for degradation of tetracycline anti-bacterial drug
- Structural and electrical properties of mol% (100 − x)Li2SO4:xP2O5 solid electrolyte system (0 ≤ x ≤ 20)
- Microwave synthesis of magnesium phosphate-rGO as an effective electrode for supercapacitor application
- Adsorptive removal of Cu(II) ions from aqueous solution using Teff (Eragrostis tef) hay based magnetized biocarbon: RSM-GA, ANN based optimization and kinetics aspects
- Efficiency assessment of hydrothermally synthesized Mn2+/3+ modified LaCoO3 nanoparticles for advanced wastewater remediation
- Synthesis of BaO/NiO/rGO nanocomposite for supercapacitor application
- Ethanedithiol-modified silica nanoparticles for selective removal of Hg2+ ions from aqueous wastewater
- Effect of Zr substitution on photocatalytic and magnetic properties of lanthanum titanate
- Investigations on the microbial activity and anti-corrosive efficiency of nickel oxide nanoparticles synthesised through green route
- Multifunctional application of different iron oxide nanoparticles
- Effect of pH in the bismuth vanadate nanorods for their supercapacitor applications
- Maximizing biogas production from leftover injera: influence of yeast addition to anaerobic digestion system
- Synthesis, characterization and efficient photo-catalytic performance of methylene blue by Zn doped SnO2 nanoparticles
- Enhancing performance: insights into the augmentation potential of acrylonitrile butadiene styrene/boron nitride composites
