| Title |
Subcritical water pretreatment enhanced methane-rich biogas production from the anaerobic digestion of brewer's spent grains |
| ID_Doc |
8416 |
| Authors |
Sganzerla, WG; Ampese, LC; Mussatto, SI; Forster-Carneiro, T |
| Title |
Subcritical water pretreatment enhanced methane-rich biogas production from the anaerobic digestion of brewer's spent grains |
| Year |
2022 |
| Published |
|
| DOI |
10.1080/09593330.2022.2157756 |
| Abstract |
This study evaluated the effectiveness of a semi-continuous flow-through subcritical water hydrolysis (SWH) pretreatment of brewer's spent grains (BSG) for subsequent application in the anaerobic digestion (AD) process. BSG pretreatment was conducted at 160 degrees C and 15 MPa with a flow rate of 10 mL water min(-1) and 15 g water g(-1) BSG. The results revealed that SWH attacked the hemicellulose structure, releasing arabinose (46.54 mg g(-1)) and xylose (39.90 mg g(-1)) sugars, and proteins (34.89 mg g(-1)). The start-up of anaerobic reactors using pretreated BSG (747.71 L CH4 kg(-1) TVS) increased the methane yield compared with the reactor without pretreatment (53.21 L CH4 kg(-1) TVS). For the process with pretreatment, the generation of electricity (134 kWh t(-1) BSG) and heat (604 MJ t(-1)) are responsible for the mitigation of 43.90 kg CO2 eq t(-1) BSG. The adoption of SWH as an eco-friendly pretreatment of biomass for AD could be a technological route to increase methane-rich biogas and bioenergy production, supporting the circular economy transition by reducing the carbon footprint of the beer industry. |
| Author Keywords |
Brewer's spent grains; subcritical water hydrolysis; lignocellulosic biomass; anaerobic digestion; biorefinery |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000899891200001 |
| WoS Category |
Environmental Sciences |
| Research Area |
Environmental Sciences & Ecology |
| PDF |
|