The biogas upgrading from landfill leachate pretreated with low-frequency ultrasonic: anaerobic digestion performances and energy balance.
Sci Rep
; 14(1): 652, 2024 01 05.
Article
in En
| MEDLINE
| ID: mdl-38182688
ABSTRACT
The efficient biogas production from landfill leachate (LL) is one of hot topics in anaerobic digestion systems. Higher bioavailability of LL can be achieved by application a feasible and promising pretreatment technologies in order to utilize as a substrate for anaerobic reactors. Here, the enhanced bioavailabity of LL using the low-frequency ultrasonic process and energy balance in anaerobic digestion process was estimated within incubation period of 24 days. The optimal performance of low-frequency ultrasonic for LL biodegradability index sCOD and TVFA were estimated under influencing parameters ultrasonic density (UD) (0.02-0.14 W/mL) and Ultrasonic time (UT) (0-12 min). Moreover, the effects of low-frequency ultrasonic pretreatment process on biogas production in batch mode anaerobic reactors operated at 37 ± 1 °C were surveyed for daily and cumulative methane production, operational performance and energy balance. An increased sCOD (820 mg/L) and TVFA (659 mg/L) were observed under optimum codition UD (0.1 W/mL) and UT (10 min). The highest methane production (430 mL) was found in reactor 4, where %15 volume ratio of LL pretreated with low frequency ultrasonic were feed in. Energy balance assessment indicated that output energy for anaerobic reactors assissted with ultrasonic in range of + 6.99 and + 7.98 kJ/g VS removed. Therefore, incorporation the low-frequency ultrasonic and digestion process revealed a promising and economic technique to improve biomethane potential and energy balance from LL.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ultrasonics
/
Water Pollutants, Chemical
Language:
En
Journal:
Sci Rep
Year:
2024
Document type:
Article
Affiliation country:
Iran
Country of publication:
United kingdom