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Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production
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High-solids anaerobic digestion model for homogenized reactors.

Vicente Pastor-Poquet1, Stefano Papirio2, Jean-Philippe Steyer3

  • 1Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via Di Biasio 43, 03043 Cassino (FR), Italy; LBE, Univ Montpellier, INRA, 102 Avenue des Etangs, 11100, Narbonne, France.

Water Research
|June 22, 2018
PubMed
Summary

High-solids anaerobic digestion (HS-AD) of municipal waste shows significant total solids removal, altering reactor mass. A new model simulates these dynamics, improving understanding of HS-AD processes.

Keywords:
ADM1Apparent concentrationsHigh-solids anaerobic digestionReactor mass simulationTotal solids

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Area of Science:

  • Environmental Engineering
  • Biotechnology
  • Waste Management

Background:

  • High-solids anaerobic digestion (HS-AD) of municipal solid waste differs from 'wet' AD due to substantial total solids (TS) removal.
  • This TS removal impacts reactor mass and volume, necessitating distinct simulation approaches.

Purpose of the Study:

  • To develop a mathematical model for simulating TS and reactor mass/volume dynamics in HS-AD of the organic fraction of municipal solid waste (OFMSW).
  • To adapt the anaerobic digestion model 1 (ADM1) for HS-AD conditions, considering apparent concentrations at high TS.

Main Methods:

  • Utilized the anaerobic digestion model 1 (ADM1) as a basis for the new model.
  • Incorporated four hypotheses to account for high TS effects, including apparent concentrations.
  • Simulated HS-AD in both batch and continuous modes.

Main Results:

  • The developed model adequately simulated HS-AD of OFMSW.
  • The model accurately predicted the evolution of TS, reactor mass, ammonia, and volatile fatty acids.
  • Successful simulation of reactor content mass/volume and TS dynamics was achieved.

Conclusions:

  • The adapted ADM1 model effectively simulates HS-AD of OFMSW.
  • Accurate simulation of mass/volume and TS dynamics provides insights into inhibitory mechanisms like ammonia buildup and acidification.