Effects of Iron Oxides on the Anaerobic Codigestion Performances of the Pennisetum Hybrid and Kitchen Waste
Publication: Journal of Environmental Engineering
Volume 148, Issue 10
Abstract
The addition of iron oxides in anaerobic digestion can increase conversion efficiency. In this study, we investigated the effects of the addition of , nanoparticles, , and nanoparticles with different concentrations (0.5%–1.5%) on the anaerobic codigestion of a Pennisetum hybrid and kitchen waste in a batch-mode mesophilic experiment. The results indicated that the additives with different valence states and particle sizes had different effects on the anaerobic codigestion of the Pennisetum hybrid and kitchen waste. The addition of 0.5% [with a biogas production of volatile solid (VS)] and 0.5% (with a biogas production of VS) improved the cumulative biogas yield by 23.5% and 37.9%, respectively, compared with that of the control group (with a biogas production of VS). Further correlation analysis showed that pH and total ammonia nitrogen were positively correlated with cumulative biogas yield, whereas bicarbonate alkalinity concentration/volatile alkalinity concentration and volatile fatty acids were negatively correlated with cumulative biogas yield. This study provided insights on anaerobic codigestion of the Pennisetum hybrid and kitchen waste in the presence of iron oxides, which will be beneficial for further studies in the field of renewable energy production.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This work was supported by the Key-Area Research and Development Program of Guangdong Province (2019B110209003), National Natural Science Foundation of China (21978289), Guangdong Science and Technology Planning Project of Guangdong (2017B020238005), and Key Project of Research and Development Plan in Jiangxi Province (Grant No. 20214BBG74007).
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Published In
Journal of Environmental Engineering
Volume 148 • Issue 10 • October 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Dec 29, 2021
Accepted: May 3, 2022
Published online: Aug 12, 2022
Published in print: Oct 1, 2022
Discussion open until: Jan 12, 2023
ASCE Technical Topics:
- Biomass
- Chemical compounds
- Chemicals
- Chemistry
- Domestic wastes
- Energy engineering
- Energy sources (by type)
- Engineering fundamentals
- Engineering materials (by type)
- Environmental engineering
- Field tests
- Fuels
- Hybrid methods
- Iron compounds
- Material mechanics
- Materials engineering
- Methodology (by type)
- Nanomechanics
- Non-renewable energy
- Particles
- Pollutants
- Solid wastes
- Tests (by type)
- Waste management
- Waste treatment
- Wastes
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