TY - JOUR
T1 - Enhanced biomethane potential from wheat straw by low temperature alkaline calcium hydroxide pre-treatment
AU - Reilly, Matthew
AU - Dinsdale, Richard
AU - Guwy, Alan
PY - 2015/8/1
Y1 - 2015/8/1
N2 - A factorially designed experiment to examine the effectiveness of Ca(OH)2 pre-treatment, enzyme addition and particle size, on the mesophilic (35°C) anaerobic digestion of wheat straw was conducted. Experiments used a 48h pre-treatment with Ca(OH)2 7.4% (w/w), addition of Accellerase®-1500, with four particle sizes of wheat straw (1.25, 2, 3 and 10mm) and three digestion time periods (5, 15 and 30days). By combining particle size reduction and Ca(OH)2 pre-treatment, the average methane potential was increased by 315% (from 48NmL-CH4 g-VS-1 to 202NmL-CH4 g-VS-1) after 5days of anaerobic digestion compared to the control. Enzyme addition or Ca(OH)2 pre-treatment with 3, 2 and 1.25mm particle sizes had 30-day batch yields of between 301 and 335NmL-CH4 g-VS-1. Alkali pre-treatment of 3mm straw was shown to have the most potential as a cost effective pre-treatment and achieved 290NmL-CH4 g-VS-1, after only 15days of digestion.
AB - A factorially designed experiment to examine the effectiveness of Ca(OH)2 pre-treatment, enzyme addition and particle size, on the mesophilic (35°C) anaerobic digestion of wheat straw was conducted. Experiments used a 48h pre-treatment with Ca(OH)2 7.4% (w/w), addition of Accellerase®-1500, with four particle sizes of wheat straw (1.25, 2, 3 and 10mm) and three digestion time periods (5, 15 and 30days). By combining particle size reduction and Ca(OH)2 pre-treatment, the average methane potential was increased by 315% (from 48NmL-CH4 g-VS-1 to 202NmL-CH4 g-VS-1) after 5days of anaerobic digestion compared to the control. Enzyme addition or Ca(OH)2 pre-treatment with 3, 2 and 1.25mm particle sizes had 30-day batch yields of between 301 and 335NmL-CH4 g-VS-1. Alkali pre-treatment of 3mm straw was shown to have the most potential as a cost effective pre-treatment and achieved 290NmL-CH4 g-VS-1, after only 15days of digestion.
KW - Alkaline pre-treatment
KW - Cellulase
KW - Methane potential
KW - Particle size
KW - Wheat straw
U2 - 10.1016/j.biortech.2015.03.150
DO - 10.1016/j.biortech.2015.03.150
M3 - Article
C2 - 25898087
AN - SCOPUS:84927720406
SN - 0960-8524
VL - 189
SP - 258
EP - 265
JO - Bioresource Technology
JF - Bioresource Technology
ER -