Comparison of the mesophilic and thermophilic anaerobic digestion of spent cow bedding in leach-bed reactors

Silvio Riggio; M. A. Hernandéz-Shek; Michel Torrijos; G. Vives; G. Esposito; Eric D. Van Hullebusch; Jean-Philippe Steyer; Renaud Escudié

doi:10.1016/j.biortech.2017.02.056

Comparison of the mesophilic and thermophilic anaerobic digestion of spent cow bedding in leach-bed reactors

Silvio Riggio ^{1, 2, 3} M. A. Hernandéz-Shek ⁴ Michel Torrijos ¹ G. Vives ⁴ G. Esposito ² Eric D. Van Hullebusch ^{3, 5} Jean-Philippe Steyer ¹ Renaud Escudié ^{1, *}

* Corresponding author

1 LBE - Laboratoire de Biotechnologie de l'Environnement [Narbonne]

2 Department of Civil and Mechanical Engineering

3 LGE - Laboratoire Géomatériaux et Environnement

4 Naskeo Environnement

5 Department of Environmental Engineering and Water Technology

Abstract : Anaerobic digestion of spent cow bedding in batch leach-bed reactors was compared in mesophilic and thermophilic conditions for the first time. Results show that the use of thermophilic conditions enhanced only the degradation kinetics of easily-degradable matter during the first days of the digestion, whereas similar methane yields (80% of the Biomethane Potential) were reached after 42 days at both temperatures. Therefore, thermophilic conditions did not improve the overall process performance when spent cow bedding, a substrate rich in slowly-degradable compounds, was digested. Moreover, the high initial biogas production rate in thermophilic reactors was found to significantly reduce the energetic performance of the cogeneration unit at industrial scale, leading to a 5.9 % decrease in the annual electricity production when compared to a mesophilic one.

Keywords : dry anaerobic digestion leach-bed reactor (LBR) thermophilic temperature discontinuous biogas production electric energy production poultry litter cow

Document type :

Journal articles

Domain :

Life Sciences [q-bio]

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https://hal.archives-ouvertes.fr/hal-01605988
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Submitted on : Monday, October 2, 2017 - 10:15:55 PM
Last modification on : Wednesday, March 14, 2018 - 11:44:57 AM

Comparison of the mesophilic and thermophilic anaerobic digestion of spent cow bedding in leach-bed reactors

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Comparison of the mesophilic and thermophilic anaerobic digestion of spent cow bedding in leach-bed reactors

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