Next Article in Journal
A Self-Assembled ZnII-NdIII Heterohexanuclear Dimer Based on a Hexadentate N2O4-Type Ligand and Terephthalic Acid: Synthesis, Structure, and Fluorescence Properties
Next Article in Special Issue
Acid Assisted Organosolv Delignification of Beechwood and Pulp Conversion towards High Concentrated Cellulosic Ethanol via High Gravity Enzymatic Hydrolysis and Fermentation
Previous Article in Journal
Using Natural Biomacromolecules for Adsorptive and Enzymatic Removal of Aniline Blue from Water
Previous Article in Special Issue
An Overview of Current Pretreatment Methods Used to Improve Lipid Extraction from Oleaginous Microorganisms
Open AccessFeature PaperArticle

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

LBE, University of Montpellier, INRA, 102, Avenue des Etangs, 11100 Narbonne, France
Author to whom correspondence should be addressed.
Molecules 2018, 23(7), 1608;
Received: 18 May 2018 / Revised: 27 June 2018 / Accepted: 28 June 2018 / Published: 2 July 2018
(This article belongs to the Special Issue Efficient Technology for the Pretreatment of Biomass)
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 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. View Full-Text
Keywords: anaerobic digestion; biogas; lignocellulosic biomass; alkali pretreatment anaerobic digestion; biogas; lignocellulosic biomass; alkali pretreatment
Show Figures

Figure 1

MDPI and ACS Style

Thomas, H.L.; Seira, J.; Escudié, R.; Carrère, H. Lime Pretreatment of Miscanthus: Impact on BMP and Batch Dry Co-Digestion with Cattle Manure. Molecules 2018, 23, 1608.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop