Development of a kinetic model for anaerobic dry digestion processes: Focus on acetate degradation and moisture content

Bollon, Julien; Le-hyaric, R.; Benbelkacem, Hassen; Buffière, Pierre

doi:10.1016/j.bej.2011.06.011

Cited by 72 publications

(28 citation statements)

References 13 publications

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“…Appropriate leachate percolation through the solid waste body (amount of recirculated leachate, leachate injection geometry, injection flow rate and recirculation frequency) is a key point to solve these major issues and to increase the overall process efficiency (Benbelkacem et al, 2010 Leachate helps to provide water, microorganisms, nutrients and to dilute intermediate anaerobic digestion products (mainly volatile fatty acids VFAs, NH 4 + and H 2 ) and potential toxins (Bilgili et al, 2007;Vavilin et al, 2003;Xie et al, 2012). Water is a key component as it acts as a solvent and contributes to mass transfer, the diffusion of microorganisms and the colonization of the substrate reactive surface (Vavilin et al, 2003;Le Hyaric et al, 2011;Bollon et al, 2011). A minimum water content is necessary for biological activity (Lay et al, 1997;Pommier et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Assessment of percolation through a solid leach bed in dry batch anaerobic digestion processes

Shewani

Horgue²,

Pommier³

et al. 2015

Bioresource Technology

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This work aimed at assessing water percolation through a solid cow manure leach bed in dry batch AD processes. A laboratory-scale percolation column and an experimental methodology were set up. Water behaviour was modelled by a double porosity medium approach. An experimental procedure was proposed to determine the main hydrodynamic parameters of the multiphase flow model: the porosity, the permeability and the term for water exchange from macro- to micro-porosity. Micro- and macro-porosity values ranged from 0.42 to 0.70 m(3) m(-3) and 0.18 to 0.50 m(3) m(-3). Intrinsic permeability values for solid cow manure ranged from 5.55·10(-11) to 4.75·10(-9) m(2). The term for water exchange was computed using a 2nd order model. The CFD tool developed was used to simulate successive percolation and drainage operations. These results will be used to design leachate recirculation strategies and predict biogas production in full-scale dry AD batch processes.

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Section: Introductionmentioning

confidence: 99%

Assessment of percolation through a solid leach bed in dry batch anaerobic digestion processes

Shewani

Horgue²,

Pommier³

et al. 2015

Bioresource Technology

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“…Whilst this can have marked benefits in terms of process design, high-solids feedstocks can be difficult to handle (particularly in terms of mixing and pumping). Diffusion and mass transfer of solutes between the biomass and the micro consortia within the digester can be altered due to higher viscosity and this can then, in turn, impact upon the rate of reactions and accumulation of compounds within the digester [103,104].…”

Section: Liquid/solid State (Dry) Admentioning

confidence: 99%

Anaerobic Digestion

Melville¹,

Weger²,

Wiesgickl³

et al. 2014

Transformation of Biomass

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“…The ADM1 model has been modified to take into account the specificity of dry anaerobic digestion processes. This kinetic model is developed for a homogeneous (completely mixed) system and its structure was already presented in a previous paper . The main differences are detailed here.…”

Section: Model Descriptionmentioning

confidence: 99%

“…The dry digestion model proposed is depicted in Figure , and the model structure is described in detail in the previous paper …”

Section: Model Descriptionmentioning

confidence: 99%

“…However, ADM1 does not seem to be adapted to dry digestion media, in particular because of the singular properties of dry media in terms of biological kinetics and mass transfer. A previous article detailed the main modifications applied to ADM1 to adapt to dry conditions . It was shown that the model calibration with the fitting of biochemical parameters only was not sufficient for the full understanding of the observed experimental data, especially at high solids content.…”

Section: Introductionmentioning

confidence: 99%

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Dry anaerobic digestion modelling: Parameter sensitivity

et al. 2014

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A model dedicated to dry anaerobic digestion process was previously developed. This model was based on the ADM1 model and modified to take into account the specificity of dry anaerobic media. The objective of the work presented here was to study the sensitivity to the model of 2 parameters. The first parameter (k L a) was related to mass transfer of the biodegradation products (CH 4 , CO 2 , H 2 ) from liquid phase to gas phase. Two gas production behaviours were pointed out, depending on k L a value and corresponding to limiting or non-limiting transfer rate. A k L a value of 5 d À1 marked the transition. The second parameter (k m X) was linked to biological kinetic reactions. The sensitivity of k m X was important: a variation of AE10 % of its value affected clearly the kinetic consumption of the substrate. A method to determine those parameters was presented. This method was then used to determine both biological kinetic parameter and mass transfer coefficient from batch experimental data of methane production with acetate as organic substrate at two different moisture contents.

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Development of a kinetic model for anaerobic dry digestion processes: Focus on acetate degradation and moisture content

Cited by 72 publications

References 13 publications

Assessment of percolation through a solid leach bed in dry batch anaerobic digestion processes

Assessment of percolation through a solid leach bed in dry batch anaerobic digestion processes

Anaerobic Digestion

Dry anaerobic digestion modelling: Parameter sensitivity

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