1. Alkaline pre-treatment to enhance two-stage H2 batch/CH4 continuous production from sunflower stalks
- Author
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Monlau, Florian, Kaparaju, P., Trably, Eric, Steyer, Jean-Philippe, Carrère, Hélène, Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA), Department of Biological and Environmental Science [Jyväskylä Univ] (JYU), University of Jyväskylä (JYU), International Water Association (IWA). IWA Anaerobic Digestion Specialist Group, INT., and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,anaerobic digestion ,dark fermentation ,[SDV]Life Sciences [q-bio] ,biohythane ,[SDE]Environmental Sciences ,sunflower stalks ,alkaline pretreatment - Abstract
International audience; Second generation biofuels such as biohythane, a mixture of biohydrogen (H2) and methane (CH4), produced through two-stage H2 / CH4 anaerobic processes represent a promising alternative to fossils fuels. However, lignocellulosic substrates contain recalcitrant structures that require a pretreatment step before anaerobic fermentative processes. In the present study, the impact of alkaline pretreatment (55°C, 24h, 4% NaOH) before a two-stage H2(batch)/CH4(continuous) process was investigated. Alkaline pretreatment did not enhance hydrogen yield probably due to the low solubilization of holocelluloses into soluble sugars. However, alkaline pretreatment enhanced the methane yield resulting in a 30 % increase of the total energy produced compared to the two-stage H2 (batch)/ CH4 (continuous) with no pretreatment.
- Published
- 2013