Fatemeh Norouzi - Department of Energy Engineering and Physics, Amirkabir University of Technology (Tehran Polytechnic), P. O. Box: ۱۵۸۷۵-۴۴۱۳, Tehran, Tehran, Iran.
Morteza Hosseinpour - Department of Renewable Energy Research, Niroo Research Institute (NRI), Tehran, Tehran, Iran.
Saeed Talebi - Department of Energy Engineering and Physics, Amirkabir University of Technology (Tehran Polytechnic), P. O. Box: ۱۵۸۷۵-۴۴۱۳, Tehran, Tehran, Iran.

In this paper, an industrial dairy farm unit was taken as a case study to carry out the applicable technical assessment for the construction of a biogas plant using a combined heat and power (CHP) unit. A comprehensive sensitivity analysis was applied to examine the effectiveness of the operational parameters and feed composition in the purity and production rate of biogas. Aspen Plus was used to implement the anaerobic digestion process. The results showed that any increase in the digester’s operational performance and mass rate of feedstock water led to the modification of biomethane content, but dropped in biogas mass flow rate. Moreover, an increase in the mass rate of carbohydrates, protein, and organic load rate (OLR) of feedstock reduces methane composition. Besides, increasing the rate of lipids has raised the rate of methane production and its composition.

anaerobic digestion, Biogas, Process simulation, Liquid dairy manure