Journal
BIORESOURCE TECHNOLOGY
Volume 327, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.124811
Keywords
Syngas biomethanation; Biomethane; Anaerobic sludge digestion; Thermo-chemical processes
Funding
- Technological Agency of the Czech Republic [TK01030051]
- Czech Ministry of Education, Youth and Sports [MSM6046137308]
- [A1_FTOP_2020_002]
- [A2_FTOP_2020_002]
Ask authors/readers for more resources
The study found that the H2 concentration in syngas is the main factor affecting the CH4 content in produced biogas. The use of an ex-situ reactor with H2 addition helps convert residual CO and CO2, achieving a maximum CH4 content of 94.7% in the produced biomethane.
This study shows biomethane production in a novel two-stage syngas biomethanation consisting of the thermophilic anaerobic digestion of sewage sludge combined with an injection of syngas as the first stage. Since the syngas does not contain enough reducing equivalents, the produced biogas was connected to the second stage consisting of the trickle-bed reactor with the external H2 addition (ex-situ) to increase the CH4 content further. The aim was to evaluate the influence of different syngas compositions on the biomethane production in both stages. The results showed that H2 concentration in syngas is the main factor affecting the CH4 content in biogas. Moreover, the ex-situ reactor with H2 addition served to convert the residual CO and CO2, achieving the maximum CH4 content of 94.7% in the produced biomethane. In summary, the two-stage process enables biomethane production without any inhibitory effects on anaerobic sludge digestion.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available