American Journal of Chemical Engineering

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Effect of Process Condition on the Bio-Digestion of Cow Dung for Organic Fertilizer Production

Received: 18 September 2018    Accepted: 30 September 2018    Published: 01 November 2018
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Abstract

Studies were conducted on the biodigestion of cow-dung into organic fertilizer with the aim of determining the effect of process parameters on the quality of the product. The Hydrogen ion index (pH) was varied from 3.5 to 7.0 whereas the microbe: substrate (M/S) ratio was varied from 1.33 to 4.5g/kg and biodigestion time from 3 to 24hrs. The fertilizer produced was characterized by the NPK content and the production index (PI). The extent of biodigestion as indicated by the PI value, varied with the pH, ranging from 0.068 to 0.109 for pH between 3.5 to 7.0. Hydrogen ion index (pH) range of 3.5-4.0 at the temperature of 350°C, using native microbial flora were discovered to be most favorable to the biodigestion process, with PI 0.109 to 0.12. It was also discovered that the use of mixed culture (native microbe plus cultured saccharomyces cerevisiea further enhanced the result. A maximum microbe-substrate ratio of 4.5g/kg and a minimum of 2.67g/kg on mass basis were recommended. Within a bioconversion period of nine hours (9hrs), a product with N. P. K values of 2.9; 0.016, and 1.55 was obtained representing an increase in fertilizer value by 61.1% and 78.5% in Nitrogen (N) and potassium nutrient compositions respectively within the period. The fertilizer has an acceptable odour when dried and readily available to plant on application. It was also observed that the biodigestion process generated an exceeding quantity of biogas which can be trapped and upgraded for other domestic and industrial applications.

DOI 10.11648/j.ajche.20180605.14
Published in American Journal of Chemical Engineering (Volume 6, Issue 5, September 2018)
Page(s) 99-106
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), 2024. Published by Science Publishing Group

Keywords

Biodigestion, Fertilizer, Sustainability, Ozone

References
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[17] Klinkner, B. A (2014). Anaerobic digestion as a renewable energy source andwaste management Technology. What must be done for this technology torealize success in United States? UMass Law Review 9, 79.
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Author Information
  • Department of Chemical Engineering, Institute of Management & Technology, Enugu, Nigeria

  • Department of Food Science & Technology, Ebonyi State University, Abakaliki, Nigeria

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  • APA Style

    Udeh Sunday, Ekumankama Ekuma Onu. (2018). Effect of Process Condition on the Bio-Digestion of Cow Dung for Organic Fertilizer Production. American Journal of Chemical Engineering, 6(5), 99-106. https://doi.org/10.11648/j.ajche.20180605.14

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    Udeh Sunday; Ekumankama Ekuma Onu. Effect of Process Condition on the Bio-Digestion of Cow Dung for Organic Fertilizer Production. Am. J. Chem. Eng. 2018, 6(5), 99-106. doi: 10.11648/j.ajche.20180605.14

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    AMA Style

    Udeh Sunday, Ekumankama Ekuma Onu. Effect of Process Condition on the Bio-Digestion of Cow Dung for Organic Fertilizer Production. Am J Chem Eng. 2018;6(5):99-106. doi: 10.11648/j.ajche.20180605.14

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  • @article{10.11648/j.ajche.20180605.14,
      author = {Udeh Sunday and Ekumankama Ekuma Onu},
      title = {Effect of Process Condition on the Bio-Digestion of Cow Dung for Organic Fertilizer Production},
      journal = {American Journal of Chemical Engineering},
      volume = {6},
      number = {5},
      pages = {99-106},
      doi = {10.11648/j.ajche.20180605.14},
      url = {https://doi.org/10.11648/j.ajche.20180605.14},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ajche.20180605.14},
      abstract = {Studies were conducted on the biodigestion of cow-dung into organic fertilizer with the aim of determining the effect of process parameters on the quality of the product. The Hydrogen ion index (pH) was varied from 3.5 to 7.0 whereas the microbe: substrate (M/S) ratio was varied from 1.33 to 4.5g/kg and biodigestion time from 3 to 24hrs. The fertilizer produced was characterized by the NPK content and the production index (PI). The extent of biodigestion as indicated by the PI value, varied with the pH, ranging from 0.068 to 0.109 for pH between 3.5 to 7.0. Hydrogen ion index (pH) range of 3.5-4.0 at the temperature of 350°C, using native microbial flora were discovered to be most favorable to the biodigestion process, with PI 0.109 to 0.12. It was also discovered that the use of mixed culture (native microbe plus cultured saccharomyces cerevisiea further enhanced the result. A maximum microbe-substrate ratio of 4.5g/kg and a minimum of 2.67g/kg on mass basis were recommended. Within a bioconversion period of nine hours (9hrs), a product with N. P. K values of 2.9; 0.016, and 1.55 was obtained representing an increase in fertilizer value by 61.1% and 78.5% in Nitrogen (N) and potassium nutrient compositions respectively within the period. The fertilizer has an acceptable odour when dried and readily available to plant on application. It was also observed that the biodigestion process generated an exceeding quantity of biogas which can be trapped and upgraded for other domestic and industrial applications.},
     year = {2018}
    }
    

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    AU  - Udeh Sunday
    AU  - Ekumankama Ekuma Onu
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    AB  - Studies were conducted on the biodigestion of cow-dung into organic fertilizer with the aim of determining the effect of process parameters on the quality of the product. The Hydrogen ion index (pH) was varied from 3.5 to 7.0 whereas the microbe: substrate (M/S) ratio was varied from 1.33 to 4.5g/kg and biodigestion time from 3 to 24hrs. The fertilizer produced was characterized by the NPK content and the production index (PI). The extent of biodigestion as indicated by the PI value, varied with the pH, ranging from 0.068 to 0.109 for pH between 3.5 to 7.0. Hydrogen ion index (pH) range of 3.5-4.0 at the temperature of 350°C, using native microbial flora were discovered to be most favorable to the biodigestion process, with PI 0.109 to 0.12. It was also discovered that the use of mixed culture (native microbe plus cultured saccharomyces cerevisiea further enhanced the result. A maximum microbe-substrate ratio of 4.5g/kg and a minimum of 2.67g/kg on mass basis were recommended. Within a bioconversion period of nine hours (9hrs), a product with N. P. K values of 2.9; 0.016, and 1.55 was obtained representing an increase in fertilizer value by 61.1% and 78.5% in Nitrogen (N) and potassium nutrient compositions respectively within the period. The fertilizer has an acceptable odour when dried and readily available to plant on application. It was also observed that the biodigestion process generated an exceeding quantity of biogas which can be trapped and upgraded for other domestic and industrial applications.
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