Simplified Mathematical Model for Quantitative Analysis of Biogas Production Rate in a Continuous Digester

Authors

  • Wiratni Budhijanto Gadjah Mada University
  • Chandra Wahyu Purnomo Gadjah Mada University
  • Nobel Christian Siregar Gadjah Mada University

DOI:

https://doi.org/10.4186/ej.2012.16.5.167

Abstract

Experiments were conducted in a horizontal continuous biodigester constructed of 12" ID PVC pipe of 4 m, 5 m, and 6 m length to produce biogas from cow manure slurry. Mathematical models were developed based on simplified mechanism of anaerobic digestion of organic matters. The data from field experiments were used to fit the mathematical model for predicting the rate of biogas production and the selectivity of methane production over carbon dioxide formation. The mathematical models described in this paper were reasonably good to fit the experimental data. Selectivity of methane over carbon dioxide was significantly affected by the ratio of water and manure in the slurry. Conversion could be increased by recycling a portion of the sludge from the biodigester effluent.

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Author Biographies

Wiratni Budhijanto

Research Group Science for the Community, Laboratory of Food and Bioprocess Engineering, Chemical Engineering Department, Gadjah Mada University, Jl. Grafika 2, Yogyakarta 55281, Indonesia

Chandra Wahyu Purnomo

Research Group Science for the Community, Laboratory of Food and Bioprocess Engineering, Chemical Engineering Department, Gadjah Mada University, Jl. Grafika 2, Yogyakarta 55281, Indonesia

Nobel Christian Siregar

Research Group Science for the Community, Laboratory of Food and Bioprocess Engineering, Chemical Engineering Department, Gadjah Mada University, Jl. Grafika 2, Yogyakarta 55281, Indonesia

Published

Vol 16 No 5, Jul 5, 2012

How to Cite

[1]
W. Budhijanto, C. W. Purnomo, and N. C. Siregar, “Simplified Mathematical Model for Quantitative Analysis of Biogas Production Rate in a Continuous Digester”, Eng. J., vol. 16, no. 5, pp. 167-176, Jul. 2012.