Modelling non-ideal bio-physical-chemical effects on high-solids anaerobic digestion of the organic fraction of municipal solid waste.
This study evaluates the main effects of including 'non-ideal' bio-physical-chemical corrections in high-solids anaerobic digestion (HS-AD) of the organic fraction of municipal solid waste (OFMSW), at total solid (TS) between 10 and 40%. As a novel approach, a simple 'non-ideal' module, accounting for the effects of ionic strength (I) on the main acid-base equilibriums, was coupled to a HS-AD model, to jointly evaluate the effects of 'non-ideality' and the TS content dynamics on the HS-AD bio-physical-chemistry. 'Non-ideality' influenced the pH, concentration of inhibitors (i.e. NH3), and liquid-gas transfer (i.e. CO2), particularly at higher TS (i.e. ≥ 20%). Meanwhile, fitting the experimental data for batch assays at 15% TS showed that HS-AD of OFMSW might be operated at I ≥ 0.5 M. Therefore, all HS-AD simulations should account for 'non-ideal' corrections, when assessing the main inhibitory mechanisms (i.e. NH3 buildup and acidification) potentially occurring in HS-AD of OFMSW.
['Pastor-Poquet|Vicente|V|', 'Papirio|Stefano|S|', 'Steyer|Jean-Philippe|JP|', 'Trably|Eric|E|', 'Escudié|Renaud|R|', 'Esposito|Giovanni|G|']
D000693:Anaerobiosis D019149:Bioreactors D008697:Methane D012037:Refuse Disposal D062611:Solid Waste
Ionic strength Ammonia inhibition High-solids anaerobic digestion model Non-ideal bio-physical-chemical corrections Total solids dynamics