LAPSE:2021.0582
Published Article
LAPSE:2021.0582
Volatile Fatty Acids and Biomethane Recovery from Thickened Waste Activated Sludge: Hydrothermal Pretreatment’s Retention Time Impact
Farokh laqa Kakar, Ahmed El Sayed, Neha Purohit, Elsayed Elbeshbishy
June 29, 2021
The main objective of this study was to evaluate the hydrothermal pretreatment’s retention time influence on the volatile fatty acids and biomethane production from thickened waste activated sludge under mesophilic conditions. Six different retention times of 10, 20, 30, 40, 50, and 60 min were investigated while the hydrothermal pretreatment temperature was kept at 170 °C. The results showed that the chemical oxygen demand (COD) solubilization increased by increasing the hydrothermal pretreatment retention time up to 30 min and stabilized afterwards. The highest COD solubilization of 48% was observed for the sample pretreated at 170 °C for 30 min. Similarly, the sample pretreated at 170 °C for 30 min demonstrated the highest volatile fatty acids yield of 14.5 g COD/Lsubstrate added and a methane yield of 225 mL CH4/g TCODadded compared to 4.3 g COD/Lsubstrate added and 163 mL CH4/g TCODadded for the raw sample, respectively. The outcome of this study revealed that the optimum conditions for solubilization are not necessarily associated with the best fermentation and/or digestion performance.
Keywords
anaerobic digestion, biomethane, hydrothermal pretreatment, thickened waste activated sludge, volatile fatty acids
Suggested Citation
Kakar FL, El Sayed A, Purohit N, Elbeshbishy E. Volatile Fatty Acids and Biomethane Recovery from Thickened Waste Activated Sludge: Hydrothermal Pretreatment’s Retention Time Impact. (2021). LAPSE:2021.0582
Author Affiliations
Kakar FL: Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada
El Sayed A: Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada
Purohit N: Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada
Elbeshbishy E: Environmental Research Group for Resource Recovery, Department of Civil Engineering, Faculty of Engineering, Architecture and Science, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada
Journal Name
Processes
Volume
8
Issue
12
Article Number
E1580
Year
2020
Publication Date
2020-11-30
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr8121580, Publication Type: Journal Article
Record Map
Published Article

LAPSE:2021.0582
This Record
External Link

doi:10.3390/pr8121580
Publisher Version
Download
Files
[Download 1v1.pdf] (2.5 MB)
Jun 29, 2021
Main Article
License
CC BY 4.0
Meta
Record Statistics
Record Views
380
Version History
[v1] (Original Submission)
Jun 29, 2021
 
Verified by curator on
Jun 29, 2021
This Version Number
v1
Citations
Most Recent
This Version
URL Here
https://psecommunity.org/LAPSE:2021.0582
 
Original Submitter
Calvin Tsay
Links to Related Works
Directly Related to This Work
Publisher Version