Mathematical Simulation of Anaerobic Stratified Biofilm Processes

  • Fang Ming
  • John A Howell
  • Manuel Canovas-Diaz


A modified stratified anaerobic biofilm model has been developed. The model represents anaerobic digestion by a simplified two population distributed ecosystem. The model was built to examine the benefits that stratification can bestow on the stability and overall dynamic response of the system. Computation was carried out using the orthogonal collocation method.

Dynamic simulation was used to show that stratified biofilm populations can withstand the effects caused by organic overloading, inhibition and intermittent loading and that the time taken for the VFA concentration to reach the steady state is mainly affected by the rate of glucose conversion to VFA.

Under certain conditions the model predicted that a sustained oscillation phenomenon would be especially marked in the methanogenic bacterial layer.


Anaerobic Digestion Volatile Fatty Acid Collocation Point Glucose Conversion Volatile Fatty Acid Concentration 
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Copyright information

© Society of Chemical Industry 1989

Authors and Affiliations

  • Fang Ming
    • 1
  • John A Howell
    • 1
  • Manuel Canovas-Diaz
    • 2
  1. 1.School of Chemical EngineeringUniversity of BathBathEngland
  2. 2.Department of Biochemistry, Faculty of ChemistryUniversity of MurciaMurciaSpain

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