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Effects of Seasonal Temperature Variation on Slurry Temperature and Biogas Composition of a Commercial Fixed-Dome Anaerobic Digester Used in Bangladesh
| Content Provider | MDPI |
|---|---|
| Author | Sabbir, A. S. M. Younus Bhuiyan Saha, Chayan Kumer Nandi, Rajesh Zaman, Forid Uz Alam, Monjurul Sarker, Shiplu |
| Copyright Year | 2021 |
| Description | Biogas is produced in Bangladesh mostly through fixed-dome anaerobic digesters, which usually operate without any temperature controller. An experiment was conducted to monitor the seasonal temperature variation inside a fixed-dome type digester and its effect on biogas composition. A commercial-scale digester with a working volume of 350 $m^{3}$ was used for this study. Three k-type thermocouple sensors were used to monitor the ambient, biogas, and slurry temperatures in real-time. The results showed that the average ambient temperature in the autumn, late autumn, and winter was 29.05, 22.90, and 17.64 °C, respectively. The average slurry temperature in the autumn (30.38 °C) was higher than in the late autumn (29.36 °C) and in the winter (25.76 °C). The highest and lowest slurry temperatures were found to be 31.11 and 24.47 °C, respectively, which indicated that the digester worked within a wide temperature range, establishing both psychrophilic and mesophilic operational conditions. Higher methane concentrations were observed in the autumn than in the late autumn and winter. The $CO_{2}$ and $H_{2}$S concentrations were higher in the winter than those of in the autumn and late autumn. The electricity generation in the winter was 47.85% and 45.15% lower than in the autumn and late autumn, respectively. |
| Starting Page | 11096 |
| e-ISSN | 20711050 |
| DOI | 10.3390/su131911096 |
| Journal | Sustainability |
| Issue Number | 19 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-10-08 |
| Access Restriction | Open |
| Subject Keyword | Sustainability Agricultural Engineering Anaerobic Digestion Fixed-dome Digester Temperature Seasonal Variation Biogas |
| Content Type | Text |
| Resource Type | Article |
