Influence of pretreatment with Fenton's reagent on biogas production and methane yield from lignocellulosic biomass.
Biomass from Miscanthus giganteus, Sida hermaphrodita and Sorghum Moensch was treated with Fenton's reagent for 2 hours under optimal conditions (pH=3, mass ratio of [Fe(2+)]:[H(2)O(2)] equals 1:25 for Miscanthus and Sorghum and 1:15 for Sida). The degrees of delignification were 30.3%, 62.3% and 48.1% for the three plant species, respectively. The volatile fatty acids concentration after chemical pretreatment was high enough for production of biogas with a high methane content. Combined chemical oxidation and enzymatic hydrolysis with cellulase and cellobiase led to glucose contents of above 4 g/L. Among the tested plants, the highest biogas production (25.2 Ndm(3)/kg TS fed) with a 75% methane content was obtained with Sorghum Moensch. The results of the three-step process of biomass degradation show the necessity of applying a chemical pretreatment such as oxidation with Fenton's reagent. Moreover, the coagulation of residual Fe(3+) ions is not required for high biogas production.
Textile Research Institute, ul. Brzezinska 5/15, 92-103 Lodz, Poland. karina.michalska@iw.lodz.pl
Karina
K
Michalska
Krystian
K
Miazek
Liliana
L
Krzystek
Stanisław
S
Ledakowicz
D056804:Biofuels; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006868:Hydrolysis; D007501:Iron / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*; D008697:Methane / Q000138:chemical synthesis*; D010936:Plant Extracts / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*
D056804:Biofuels; C045076:Fenton's reagent; D010936:Plant Extracts; C036909:lignocellulose; D008031:Lignin; D006861:Hydrogen Peroxide; D007501:Iron; D008697:Methane