Process Simulation of Two-Stage Anaerobic Digestion for Methane Production


A process simulation model was developed for the anaerobic digestion (AD) process used for biogas generation. Aspen Plus software was used for this purpose. The developed model predicts the production of biogas from any substrate at any given process condition. This model was validated against a variety of industrial data on anaerobic digestion. The four steps (Hydrolysis, Acidogenesis, Acetogenesis, Methanogenesis) with a total of 46 reactions that represent the AD process were simulated with appropriate kinetics. Sensitivity analysis was implemented for 5, 10, 20 and 30% substrates concentrations to increase the methane share in the biogas by studying the effects of hydrogen addition, HRT and pressure. The developed model is flexible and predicts enhancement of methane composition by hydrogen injection qualitatively and quantitatively.


Chemical and Biochemical Engineering

Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

Biogas; Computer Software; Methane; Sensitivity Analysis; Substrates; Anaerobic; ASPEN PLUS; Aspen Plus Software; Hydrogen Injection; Process Simulation Model; Process Simulations; Substrates Concentration; Two-Stage Anaerobic Digestions; Anaerobic Digestion; HRT

International Standard Serial Number (ISSN)

1759-7269; 1759-7277

Document Type

Article - Journal

Document Version


File Type





© 2017 Taylor & Francis, All rights reserved.

Publication Date

01 Apr 2017