HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Lime pretreatment of miscanthus: impact on BMP and batch dry co-digestion with cattle manure

Abstract : In Europe, the agricultural biogas sector is currently undergoing fast developments, and cattle manure constitutes an important feedstock. Batch dry digester processes with leachate recirculation prove to be particularly interesting for small-scale plants. However, their startup being relatively slow, the process could be facilitated by co-digestion with energy crops. In this study, Miscanthus x giganteus was chosen for its high biomass yields and low input requirements. The carbohydrate accessibility of this lignocellulosic biomass is limited but may be improved with alkali pretreatment. The efficiency of lime (CaO) pretreatment with low water addition on the biochemical methane potential (BMP) of miscanthus was investigated through two experimental designs (CaO concentrations ranged between 2.5 and 17.5% and pretreatment lasted 1, 3, or 5 days). The pretreated miscanthus was then co-digested with cattle manure in dry leach bed reactors. CaO pretreatments led to a 14⁻37% improvement of miscanthus BMP, and a 67⁻227% increase in the first-order kinetics constant; a high contact time was shown to favor methane production. According to these results and to industrial requirements, miscanthus was pretreated with 5 and 10% CaO for 5 days, then co-digested with manure in dry leach bed reactors. Nevertheless, the promising results of the BMP tests were not validated. This could be related to the high water absorption capacity of miscanthus.
Document type :
Journal articles
Complete list of metadata

Cited literature [40 references]  Display  Hide  Download

https://hal.inrae.fr/hal-02626001
Contributor : Migration Prodinra Connect in order to contact the contributor
Submitted on : Tuesday, May 26, 2020 - 3:57:20 PM
Last modification on : Wednesday, March 23, 2022 - 12:08:19 PM

File

2018_Thomas_Molecules_1.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

Hélène Laurence Thomas, Jordan Seira, Renaud Escudié, Hélène Carrère. Lime pretreatment of miscanthus: impact on BMP and batch dry co-digestion with cattle manure. Molecules, MDPI, 2018, 23 (7), pp.1-13. ⟨10.3390/molecules23071608⟩. ⟨hal-02626001⟩

Share

Metrics

Record views

13

Files downloads

47