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Modelling non-ideal bio-physical-chemical effects on high-solids anaerobic digestion of the organic fraction of municipal solid waste

Abstract : 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.
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https://hal.inrae.fr/hal-02623438
Contributor : Migration Prodinra <>
Submitted on : Tuesday, May 26, 2020 - 8:12:27 AM
Last modification on : Friday, February 5, 2021 - 4:02:51 AM

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Vicente Pastor-Poquet, Stefano Papirio, Jean-Philippe Steyer, Eric Trably, Renaud Escudié, et al.. Modelling non-ideal bio-physical-chemical effects on high-solids anaerobic digestion of the organic fraction of municipal solid waste. Journal of Environmental Management, Elsevier, 2019, 238, pp.408-419. ⟨10.1016/j.jenvman.2019.03.014⟩. ⟨hal-02623438⟩

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