Extension of Enaerobic Digestion Model No. 1 with processes of sulfate reduction

• Published in: Applied biochemistry and biotechnology Vol. 109; no. 1-3; pp. 33 - 45
• Main Authors: Fedorovich, Vyacheslav, Lens, Piet, Kalyuzhnyi, Sergey
• Format: Journal Article
• Language: English
• Published: Totowa Springer Nature B.V 01-04-2003
• Subjects: Anaerobic digestion; Anaerobic processes; Archaea; Bacteria; Computer simulation; Fatty acids; Growth kinetics; Mathematical models; Methanogenic archaea; Microbalances; Microbiology; Microorganisms; Phase equilibria; Reactors; Simulation; Sludge; Sludge bed; Sludge bed reactors; Stoichiometry; Studies; Substrates; Sulfate reduction; Sulfate-reducing bacteria; Sulfates
• ISSN: 0273-2289; 1559-0291
• DOI: 10.1385/ABAB:109:1-3:33

In the present work, the Anaerobic Digestion Model No. 1 (ADM1) for computer simulation of anaerobic processes was extended to the processes of sulfate reduction. The upgrade maintained the structure of ADM1 and included additional blocks describing sulfate-reducing processes (multiple reaction stoichiometry, microbial growth kinetics, conventional material balances for ideally mixed reactor, liquid-gas interactions, and licuid-phase equilibrium chemistry). The extended model was applied to describe a long-term experiment on sulfate reduction in a volatile fatty acid-fed upflow anaerobic sludge bed reactor and was generally able to predict the outcome of competition among acetogenic bacteria, methanogenic archaea, and sulfate-reducing bacteria for these substrates. The computer simulations also showed that when the upward liquid velocity in the reactor exceeds 1 m/d, the structure of the sludge becomes essential owing to bacterial detachment.