Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste

William Wanasolo; Samwel Manyele; John Makunza

doi:doi:10.11648/j.ajche.20140203.11

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Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste

William Wanasolo, Samwel Manyele, John Makunza

Published in American Journal of Chemical Engineering (Volume 2, Issue 3)

Received: 10 May 2014 Accepted: 3 June 2014 Published: 20 June 2014

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Abstract

Anaerobic biodegradation of solid waste food-residues mixed with fruit-waste was carried out at mesophilic conditions. The goal was to model the sensitivity of biogas generation rate to initial-pH, leachate-level and ash-loading. Two process parameters were analyzed at centre-points while the third factor was set at low-, mid- and high-levels. The simulation results showed that at initial-pH of 5 (low-level), the biogas generation rate was more sensitive to ash-loading than at high-level of initial-pH values. The minimum and maximum attainable biogas generation rates due to perturbations in ash-loading were 0.79 and 1.89 mL/min, respectively, representing a difference of 1.10 mL/min. A comparison using sensitivity quotient revealed that decreasing leachate-level had a stronger effect on biogas generation rate than increasing it. It was also found that the biodegradation process was over four-times more sensitive to variations in initial-pH than in ash-loading while it was over seven-times more sensitive to variations in initial-pH than in leachate-level. It was concluded that the sensitivity of biogas generation rate was highest to variations in initial-pH and least to variations in leachate-level.

Published in	American Journal of Chemical Engineering (Volume 2, Issue 3)
DOI	10.11648/j.ajche.20140203.11
Page(s)	21-27
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

Modeling Biogas Generation, Anaerobic Biodegradation, Sensitivity, Mesophilic, Organic Solid Waste Decomposition

References

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APA Style

William Wanasolo, Samwel Manyele, John Makunza. (2014). Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste. American Journal of Chemical Engineering, 2(3), 21-27. https://doi.org/10.11648/j.ajche.20140203.11

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ACS Style

William Wanasolo; Samwel Manyele; John Makunza. Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste. Am. J. Chem. Eng. 2014, 2(3), 21-27. doi: 10.11648/j.ajche.20140203.11

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AMA Style

William Wanasolo, Samwel Manyele, John Makunza. Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste. Am J Chem Eng. 2014;2(3):21-27. doi: 10.11648/j.ajche.20140203.11

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@article{10.11648/j.ajche.20140203.11,
  author = {William Wanasolo and Samwel Manyele and John Makunza},
  title = {Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste},
  journal = {American Journal of Chemical Engineering},
  volume = {2},
  number = {3},
  pages = {21-27},
  doi = {10.11648/j.ajche.20140203.11},
  url = {https://doi.org/10.11648/j.ajche.20140203.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajche.20140203.11},
  abstract = {Anaerobic biodegradation of solid waste food-residues mixed with fruit-waste was carried out at mesophilic conditions. The goal was to model the sensitivity of biogas generation rate to initial-pH, leachate-level and ash-loading. Two process parameters were analyzed at centre-points while the third factor was set at low-, mid- and high-levels. The simulation results showed that at initial-pH of 5 (low-level), the biogas generation rate was more sensitive to ash-loading than at high-level of initial-pH values. The minimum and maximum attainable biogas generation rates due to perturbations in ash-loading were 0.79 and 1.89 mL/min, respectively, representing a difference of 1.10 mL/min.  A comparison using sensitivity quotient revealed that decreasing leachate-level had a stronger effect on biogas generation rate than increasing it. It was also found that the biodegradation process was over four-times more sensitive to variations in initial-pH than in ash-loading while it was over seven-times more sensitive to variations in initial-pH than in leachate-level. It was concluded that the sensitivity of biogas generation rate was highest to variations in initial-pH and least to variations in leachate-level.},
 year = {2014}
}

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TY  - JOUR
T1  - Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste
AU  - William Wanasolo
AU  - Samwel Manyele
AU  - John Makunza
Y1  - 2014/06/20
PY  - 2014
N1  - https://doi.org/10.11648/j.ajche.20140203.11
DO  - 10.11648/j.ajche.20140203.11
T2  - American Journal of Chemical Engineering
JF  - American Journal of Chemical Engineering
JO  - American Journal of Chemical Engineering
SP  - 21
EP  - 27
PB  - Science Publishing Group
SN  - 2330-8613
UR  - https://doi.org/10.11648/j.ajche.20140203.11
AB  - Anaerobic biodegradation of solid waste food-residues mixed with fruit-waste was carried out at mesophilic conditions. The goal was to model the sensitivity of biogas generation rate to initial-pH, leachate-level and ash-loading. Two process parameters were analyzed at centre-points while the third factor was set at low-, mid- and high-levels. The simulation results showed that at initial-pH of 5 (low-level), the biogas generation rate was more sensitive to ash-loading than at high-level of initial-pH values. The minimum and maximum attainable biogas generation rates due to perturbations in ash-loading were 0.79 and 1.89 mL/min, respectively, representing a difference of 1.10 mL/min.  A comparison using sensitivity quotient revealed that decreasing leachate-level had a stronger effect on biogas generation rate than increasing it. It was also found that the biodegradation process was over four-times more sensitive to variations in initial-pH than in ash-loading while it was over seven-times more sensitive to variations in initial-pH than in leachate-level. It was concluded that the sensitivity of biogas generation rate was highest to variations in initial-pH and least to variations in leachate-level.
VL  - 2
IS  - 3
ER  -

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Author Information

William Wanasolo

Department of Chemical and Mining Engineering, College of Engineering and Technology, University of Dar es Salaam, Tanzania
Samwel Manyele

Department of Chemical and Mining Engineering, College of Engineering and Technology, University of Dar es Salaam, Tanzania
John Makunza

Department of Structural and Construction Engineering, College of Engineering and Technology, University of Dar es Salaam, Tanzania

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APA Style

William Wanasolo, Samwel Manyele, John Makunza. (2014). Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste. American Journal of Chemical Engineering, 2(3), 21-27. https://doi.org/10.11648/j.ajche.20140203.11

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ACS Style

William Wanasolo; Samwel Manyele; John Makunza. Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste. Am. J. Chem. Eng. 2014, 2(3), 21-27. doi: 10.11648/j.ajche.20140203.11

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AMA Style

William Wanasolo, Samwel Manyele, John Makunza. Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste. Am J Chem Eng. 2014;2(3):21-27. doi: 10.11648/j.ajche.20140203.11

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@article{10.11648/j.ajche.20140203.11,
  author = {William Wanasolo and Samwel Manyele and John Makunza},
  title = {Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste},
  journal = {American Journal of Chemical Engineering},
  volume = {2},
  number = {3},
  pages = {21-27},
  doi = {10.11648/j.ajche.20140203.11},
  url = {https://doi.org/10.11648/j.ajche.20140203.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajche.20140203.11},
  abstract = {Anaerobic biodegradation of solid waste food-residues mixed with fruit-waste was carried out at mesophilic conditions. The goal was to model the sensitivity of biogas generation rate to initial-pH, leachate-level and ash-loading. Two process parameters were analyzed at centre-points while the third factor was set at low-, mid- and high-levels. The simulation results showed that at initial-pH of 5 (low-level), the biogas generation rate was more sensitive to ash-loading than at high-level of initial-pH values. The minimum and maximum attainable biogas generation rates due to perturbations in ash-loading were 0.79 and 1.89 mL/min, respectively, representing a difference of 1.10 mL/min.  A comparison using sensitivity quotient revealed that decreasing leachate-level had a stronger effect on biogas generation rate than increasing it. It was also found that the biodegradation process was over four-times more sensitive to variations in initial-pH than in ash-loading while it was over seven-times more sensitive to variations in initial-pH than in leachate-level. It was concluded that the sensitivity of biogas generation rate was highest to variations in initial-pH and least to variations in leachate-level.},
 year = {2014}
}

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TY  - JOUR
T1  - Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste
AU  - William Wanasolo
AU  - Samwel Manyele
AU  - John Makunza
Y1  - 2014/06/20
PY  - 2014
N1  - https://doi.org/10.11648/j.ajche.20140203.11
DO  - 10.11648/j.ajche.20140203.11
T2  - American Journal of Chemical Engineering
JF  - American Journal of Chemical Engineering
JO  - American Journal of Chemical Engineering
SP  - 21
EP  - 27
PB  - Science Publishing Group
SN  - 2330-8613
UR  - https://doi.org/10.11648/j.ajche.20140203.11
AB  - Anaerobic biodegradation of solid waste food-residues mixed with fruit-waste was carried out at mesophilic conditions. The goal was to model the sensitivity of biogas generation rate to initial-pH, leachate-level and ash-loading. Two process parameters were analyzed at centre-points while the third factor was set at low-, mid- and high-levels. The simulation results showed that at initial-pH of 5 (low-level), the biogas generation rate was more sensitive to ash-loading than at high-level of initial-pH values. The minimum and maximum attainable biogas generation rates due to perturbations in ash-loading were 0.79 and 1.89 mL/min, respectively, representing a difference of 1.10 mL/min.  A comparison using sensitivity quotient revealed that decreasing leachate-level had a stronger effect on biogas generation rate than increasing it. It was also found that the biodegradation process was over four-times more sensitive to variations in initial-pH than in ash-loading while it was over seven-times more sensitive to variations in initial-pH than in leachate-level. It was concluded that the sensitivity of biogas generation rate was highest to variations in initial-pH and least to variations in leachate-level.
VL  - 2
IS  - 3
ER  -

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