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 l1 at 53 C for 39 days. Untreated biomass exhibited a potential CH4 yield of 273 ml g1 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 SO2 4 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.
Giuseppe Di Girolamo, Marco Grigatti, Lorenzo Barbanti, Irini Angelidaki (2013). Effects of hydrothermal pre-treatments on Giant reed (Arundo donax) methane yield. BIORESOURCE TECHNOLOGY, 147, 152-159 [10.1016/j.biortech.2013.08.006].
Effects of hydrothermal pre-treatments on Giant reed (Arundo donax) methane yield
DI GIROLAMO, GIUSEPPE;GRIGATTI, MARCO;BARBANTI, LORENZO;
2013
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 l1 at 53 C for 39 days. Untreated biomass exhibited a potential CH4 yield of 273 ml g1 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 SO2 4 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.