High-solids anaerobic digestion model for homogenized reactors

Vicente Pastor-Poquet; Stefano Papirio; Jean-Philippe Steyer; Eric Trably; Renaud Escudié; Giovanni Esposito

doi:10.1016/j.watres.2018.06.016

High-solids anaerobic digestion model for homogenized reactors

Water Res. 2018 Oct 1:142:501-511. doi: 10.1016/j.watres.2018.06.016. Epub 2018 Jun 14.

Authors

Vicente Pastor-Poquet¹, Stefano Papirio², Jean-Philippe Steyer³, Eric Trably³, Renaud Escudié³, Giovanni Esposito⁴

Affiliations

¹ Department 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. Electronic address: vicente.pastorpoquet@unicas.it.
² Department of Civil, Architectural and Environmental Engineering, University of Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy.
³ LBE, Univ Montpellier, INRA, 102 Avenue des Etangs, 11100, Narbonne, France.
⁴ Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via Di Biasio 43, 03043 Cassino (FR), Italy.

PMID: 29929103
DOI: 10.1016/j.watres.2018.06.016

Abstract

During high-solids anaerobic digestion (HS-AD) of the organic fraction of municipal solid waste (OFMSW), an important total solid (TS) removal occurs, leading to the modification of the reactor content mass/volume, in contrast to 'wet' anaerobic digestion (AD). Therefore, HS-AD mathematical simulations need to be approached differently than 'wet' AD simulations. This study aimed to develop a modelling tool based on the anaerobic digestion model 1 (ADM1) capable of simulating the TS and the reactor mass/volume dynamics in HS-AD of OFMSW. Four hypotheses were used, including the effects of apparent concentrations at high TS. The model simulated adequately HS-AD of OFMSW in batch and continuous mode, particularly the evolution of TS, reactor mass, ammonia and volatile fatty acids. By adequately simulating the reactor content mass/volume and the TS, the HS-AD model might bring further insight about potentially inhibitory mechanisms (i.e. NH₃ buildup and/or acidification) occurring in HS-AD of OFMSW.

Keywords: ADM1; Apparent concentrations; High-solids anaerobic digestion; Reactor mass simulation; Total solids.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Ammonia / metabolism
Anaerobiosis
Bioreactors*
Fatty Acids, Volatile / metabolism
Models, Theoretical*
Refuse Disposal
Solid Waste

Substances

Fatty Acids, Volatile
Solid Waste
Ammonia