Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7081175 | Bioresource Technology | 2013 | 36 Pages |
Abstract
Twelve hydrothermal pre-treatment combinations of temperature (150 and 180 °C), time (10 and 20 min) and acid catalyst (no catalyst; H2SO4 at 2% w/w immediately before steam cooking or in 24-h pre-soaking) were tested to assess their effects on methane yield of Giant reed biomass vs. untreated control. A batch anaerobic digestion was conducted with 4 g VS lâ1 at 53 °C for 39 days. Untreated biomass exhibited a potential CH4 yield of 273 ml gâ1 VS; the four pre-treatments without acid catalyst achieved a 10%, 7%, 23% and 4% yield gain in the respective temperature/time combinations 150 °C/10 min, 150 °C/20 min, 180 °C/10 min and 180 °C/20 min. Conversely, the eight pre-treatments with H2SO4 catalyst incurred a methanogenic inhibition in association with high SO42- concentration in the hydrolysate, known to enhance sulphate reducing bacteria. Furfurals were also detected in the hydrolysate of five strong pre-treatments with H2SO4 catalyst.
Keywords
VFAAILSteam cookingTKNSRBTOCGHGHMF5-hydroxymethyl furfuralSTPRefractive index detectorflame ionisation detectorvolatile fatty acid(s)analysis of varianceANOVAchemical oxygen demandTotal solidsvolatile solidsridFIDstandard temperature and pressurebiodegradabilitySulphate reducing bacteriaacid insoluble ligninAnaerobic digestionCodhigh performance liquid chromatographyHPLCtotal Kjeldahl nitrogenTotal organic carbonGreenhouse gas
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Giuseppe Di Girolamo, Marco Grigatti, Lorenzo Barbanti, Irini Angelidaki,