Current concerns related to energy supply and carbon abatement have altered perceptions of industrial and municipal waste streams toward considering them to be resources. Biochemical conversion of biomass crops, sludge or co-digestion for recovery of energy carriers such as methane and hydrogen through anaerobic digestion and dark fermentation are promising pathways from which sustainable energy fuels can be produced. Two-stage acidogenic and methanogenic continuous anaerobic processes have been widely studied and adopted in the water industry. In this study, a mathematical model for mesophilic two-stage system (CSTR/UAF) including hydrogenogenic and methanogenic reactors is presented. The model is based on mass balances applied over a number of relevant chemical and microbial species. The model concept is implemented in a MATLAB™/Simulink™ framework and is a development of the widely applied IWA Anaerobic Digestion Model No.1 Batstone (2006). The model has been modified to incorporate degradation intermediates and kinetics of biosolids hydrolysis as well as variable product fermentation yields as function of operational conditions. Wheatfeed, which was identified as one of the potential energy source for bio-hydrogen fermentation in UK, was selected as the substrate for this study. The model can simulate the performance and dynamics of the two stage system's reactors.
|Title of host publication||13th European Biosolids and Organic Resources Conference and Workshop|
|Publication status||Published - 10 Nov 2008|
|Event|| 13th European Biosolids and Organic Resources Conference and Workshop - Lancashire County Cricket Club, Manchester|
Duration: 10 Nov 2008 → 10 Nov 2008
|Conference||13th European Biosolids and Organic Resources Conference and Workshop|
|Period||10/11/08 → 10/11/08|
- two-stage fermentation