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Regulation of Biogas Production Through Waste Water Anaerobic Digestion Process: Modeling and Parameters Optimization

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Abstract

The objective of this paper is to provide a simple modeling that gives insight into how the biogas production depends on one-step anaerobic digestion (AD) parameters. Moreover, a numerical model is developed to describe the dynamic behavior of wastewater AD. The set of equations is integrated using fourth order Runge–Kutta and Jacobian methods. A parametric study is also conducted for the optimization of certain model constants. The model validation is performed by comparing the calculated biogas production rate to the published data. In fact, a good agreement between both experimental and numerical data is obtained. We think that the present model can be useful for the control of an anaerobic digestion process and an eventual extrapolation at an industrial scale.

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Abbreviations

AD:

Anaerobic digestion

RK:

Runge–Kutta

S:

Substrate concentration (g/l)

X:

Concentration of methanogenic bacteria (g/l)

D:

Dilution rate (day−1)

S0i :

Concentration of inlet organics (g/l)

Q:

Biogas flow rate (l/day)

µ(S):

Specific growth rate (day−1)

k1 :

Consumption rate of nutrient

k2 :

Biogas production rate

t:

Time (day)

µmax :

Maximum specific growth rate (day−1)

ks :

Saturation constant (g/l)

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Authors and Affiliations

  1. Sfax University, IPEIS, P. Box 1172, 3018, Sfax, Tunisia

    Hend Mejdoub & Hatem Ksibi

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  1. Hend Mejdoub
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  2. Hatem Ksibi
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Correspondence to Hatem Ksibi.

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Mejdoub, H., Ksibi, H. Regulation of Biogas Production Through Waste Water Anaerobic Digestion Process: Modeling and Parameters Optimization. Waste Biomass Valor 6, 29–35 (2015). https://doi.org/10.1007/s12649-014-9324-5

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