Lime Pretreatment of Miscanthus: Impact on BMP and Batch Dry Co-Digestion with Cattle Manure

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Hélène Laurence ThomasHélène Carrere

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 xgiganteus 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 ...Continue Reading

References

Jun 1, 2011·Biotechnology Advances·Valery B AgborDavid B Levin
May 29, 2012·Waste Management·My CarlssonFernando Morgan-Sagastume
Sep 6, 2015·Bioresource Technology·Jun Seok KimTae Hyun Kim
Nov 22, 2016·Bioresource Technology·Xuefei ZhouYu Gu

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Citations

Oct 31, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Aurélie BichotDiana García-Bernet
May 6, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Shangyuan TangXiyu Cheng
Mar 22, 2021·Bioresource Technology·C Van VlierbergheH Carrere
Apr 5, 2021·Bioresource Technology·Kunwar ParitoshVivekanand Vivekanand
Jul 25, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Lütfiye DumluN Altınay Perendeci

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R : A Language Environment for Statistical Computing
R Development Core Team
Excel Solver
R Foundation for Statistical
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