Extrusion and enzymatic hydrolysis as pretreatments on corn cob for biogas production

RENEWABLE ENERGY

卷:107

Article

Perez-Rodriguez, N.^1,2  Garcia-Bernet, D.³  Dominguez, J. M.^1,2 

[1] Univ Vigo, Dept Chem Engn, Fac Sci, Campus Ourense,As Lagoas S-N, Orense 32004, Spain

[2] CITI Univ Vigo, Lab Agrofood Biotechnol, Tecnopole,Parque Tecnol Galicia, San Cibrao Das Vinas 32900, Ourense, Spain

[3] INRA, LBE, Halle Biotechnol Environm, Parc Maditerraneen Innovat, F-11100 Narbonne, France

关键词: Methane;    Biogas;    Pretreatment;    Extrusion;    Enzymatic hydrolysis;    Corncob;   

DOI  :  10.1016/j.renene.2017.02.030

来源: Elsevier

【 摘 要 】

Although agricultural wastes such as corn cob could be employed as substrates for biogas production, their lignocellulosic nature entails difficulties for their use. For this reason, a pretreatment of the biomass is recommended. Considering that there is limited information about the effects of extrusion as pretreatment on biogas production from biomass, this pretreatment alone or in combination with alkali and/or with the enzymatic hydrolysis was evaluated to improve the production of methane by anaerobic digestion of corn cob. The lignocellulosic composition, methane yields and biogas composition of the corn cob before and after pretreatments were compared. Among all the pretreatments studied, the sequential alkali extrusion and enzymatic hydrolysis (A+FE+H) pretreatment accomplished the major improvement with an increase of the methane volume produced of 223% in regards to the anaerobic digestion of the raw corn cob. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free