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The Influence of Biocatalytic Plant Extracts on Biogas Production from Kitchen Wastes at Cryo-mesophilic Temperature Regimes

Received: 8 September 2019     Accepted: 5 October 2019     Published: 21 October 2019
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Abstract

Radicalization in waste-to-energy systems are on the rise to meet human energy demands. Biogas generation from kitchen wastes is one such scheme, though affected by poor yields and methane levels at low temperatures. In this research, biocatalytic extracts with fermentative properties were hereby assessed on their potential to fasten these processes and increase the biogas yield at ambient temperatures. The variations in kitchen waste substrate anaerobic parameters and elemental composition as well as biogas yields and methane levels were monitored in a 28-day retention period. Three 40-liter batch and unstirred bio-digesters containing biocatalysts Terminalia b., Acanthaceae spp. and a control setup were used. The results indicated rapid saccharification rates in the samples with additives. Terminalia b. additives exhibited high volatile solids hydrolysis rate of 98.3% followed by Acanthaceae spp. (50.8%) and control sample (29.4%). Similar trends were observed in organic carbon reduction as the levels of nitrogen, phosphorus and sulfur linearly increased. The biocatalysts did not affect substrate pH, volatile fatty acids and alkalinity levels. Terminalia b. sample produced 2.32 folds higher while Acanthaceae spp. sample produced 1.375 folds higher than the control sample. Terminalia b. methane levels were highest (45.475±0.922%) followed by the control sample (41.750±1.401) and Acanthaceae spp. sample (39.275±0.263%) after 28-day retention period at 19.5±0.5°C. Use of these biocatalysts in biofuel synthesis can thus optimize biogas production leading to greener economies.

Published in International Journal of Economy, Energy and Environment (Volume 4, Issue 5)
DOI 10.11648/j.ijeee.20190405.12
Page(s) 96-105
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Kitchen Waste, Biogas, Biocatalysts, Low Temperature

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Cite This Article
  • APA Style

    Bakari Chaka, Aloys Osano, Justin Maghanga, Martin Magu. (2019). The Influence of Biocatalytic Plant Extracts on Biogas Production from Kitchen Wastes at Cryo-mesophilic Temperature Regimes. International Journal of Economy, Energy and Environment, 4(5), 96-105. https://doi.org/10.11648/j.ijeee.20190405.12

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    ACS Style

    Bakari Chaka; Aloys Osano; Justin Maghanga; Martin Magu. The Influence of Biocatalytic Plant Extracts on Biogas Production from Kitchen Wastes at Cryo-mesophilic Temperature Regimes. Int. J. Econ. Energy Environ. 2019, 4(5), 96-105. doi: 10.11648/j.ijeee.20190405.12

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    AMA Style

    Bakari Chaka, Aloys Osano, Justin Maghanga, Martin Magu. The Influence of Biocatalytic Plant Extracts on Biogas Production from Kitchen Wastes at Cryo-mesophilic Temperature Regimes. Int J Econ Energy Environ. 2019;4(5):96-105. doi: 10.11648/j.ijeee.20190405.12

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  • @article{10.11648/j.ijeee.20190405.12,
      author = {Bakari Chaka and Aloys Osano and Justin Maghanga and Martin Magu},
      title = {The Influence of Biocatalytic Plant Extracts on Biogas Production from Kitchen Wastes at Cryo-mesophilic Temperature Regimes},
      journal = {International Journal of Economy, Energy and Environment},
      volume = {4},
      number = {5},
      pages = {96-105},
      doi = {10.11648/j.ijeee.20190405.12},
      url = {https://doi.org/10.11648/j.ijeee.20190405.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijeee.20190405.12},
      abstract = {Radicalization in waste-to-energy systems are on the rise to meet human energy demands. Biogas generation from kitchen wastes is one such scheme, though affected by poor yields and methane levels at low temperatures. In this research, biocatalytic extracts with fermentative properties were hereby assessed on their potential to fasten these processes and increase the biogas yield at ambient temperatures. The variations in kitchen waste substrate anaerobic parameters and elemental composition as well as biogas yields and methane levels were monitored in a 28-day retention period. Three 40-liter batch and unstirred bio-digesters containing biocatalysts Terminalia b., Acanthaceae spp. and a control setup were used. The results indicated rapid saccharification rates in the samples with additives. Terminalia b. additives exhibited high volatile solids hydrolysis rate of 98.3% followed by Acanthaceae spp. (50.8%) and control sample (29.4%). Similar trends were observed in organic carbon reduction as the levels of nitrogen, phosphorus and sulfur linearly increased. The biocatalysts did not affect substrate pH, volatile fatty acids and alkalinity levels. Terminalia b. sample produced 2.32 folds higher while Acanthaceae spp. sample produced 1.375 folds higher than the control sample. Terminalia b. methane levels were highest (45.475±0.922%) followed by the control sample (41.750±1.401) and Acanthaceae spp. sample (39.275±0.263%) after 28-day retention period at 19.5±0.5°C. Use of these biocatalysts in biofuel synthesis can thus optimize biogas production leading to greener economies.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - The Influence of Biocatalytic Plant Extracts on Biogas Production from Kitchen Wastes at Cryo-mesophilic Temperature Regimes
    AU  - Bakari Chaka
    AU  - Aloys Osano
    AU  - Justin Maghanga
    AU  - Martin Magu
    Y1  - 2019/10/21
    PY  - 2019
    N1  - https://doi.org/10.11648/j.ijeee.20190405.12
    DO  - 10.11648/j.ijeee.20190405.12
    T2  - International Journal of Economy, Energy and Environment
    JF  - International Journal of Economy, Energy and Environment
    JO  - International Journal of Economy, Energy and Environment
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    EP  - 105
    PB  - Science Publishing Group
    SN  - 2575-5021
    UR  - https://doi.org/10.11648/j.ijeee.20190405.12
    AB  - Radicalization in waste-to-energy systems are on the rise to meet human energy demands. Biogas generation from kitchen wastes is one such scheme, though affected by poor yields and methane levels at low temperatures. In this research, biocatalytic extracts with fermentative properties were hereby assessed on their potential to fasten these processes and increase the biogas yield at ambient temperatures. The variations in kitchen waste substrate anaerobic parameters and elemental composition as well as biogas yields and methane levels were monitored in a 28-day retention period. Three 40-liter batch and unstirred bio-digesters containing biocatalysts Terminalia b., Acanthaceae spp. and a control setup were used. The results indicated rapid saccharification rates in the samples with additives. Terminalia b. additives exhibited high volatile solids hydrolysis rate of 98.3% followed by Acanthaceae spp. (50.8%) and control sample (29.4%). Similar trends were observed in organic carbon reduction as the levels of nitrogen, phosphorus and sulfur linearly increased. The biocatalysts did not affect substrate pH, volatile fatty acids and alkalinity levels. Terminalia b. sample produced 2.32 folds higher while Acanthaceae spp. sample produced 1.375 folds higher than the control sample. Terminalia b. methane levels were highest (45.475±0.922%) followed by the control sample (41.750±1.401) and Acanthaceae spp. sample (39.275±0.263%) after 28-day retention period at 19.5±0.5°C. Use of these biocatalysts in biofuel synthesis can thus optimize biogas production leading to greener economies.
    VL  - 4
    IS  - 5
    ER  - 

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Author Information
  • Department of Mathematics and Physical Sciences, Maasai Mara University, Narok, Kenya

  • The Centre for Innovation, New and Renewable Energy (CINRE), Maasai Mara University, Narok, Kenya

  • Department of Statistics and Physical Sciences, Taita Taveta University, Voi, Kenya

  • Department of Chemistry, Multimedia University of Kenya, Nairobi, Kenya

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