کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4997548 | 1459911 | 2017 | 7 صفحه PDF | دانلود رایگان |

- The influence of pressure on anaerobic digestion up to 50Â bar was examined experimentally.
- Increasing pressure decreases pH value in the methane reactor until 6.53.
- Increasing pressure increases methane content over 90%.
- Increasing pressure decreases specific methane yield until 0.26Â LÂ g-1 CODadded.
- The pressurized methane reactor operates very stable.
The concept of pressurized two-stage anaerobic digestion integrates biogas production, purification and pressure boosting within one process. The produced methane-rich biogas can be fed into gas grids with considerably less purification effort. To investigate biogas production under high pressures up to 50Â bar, a lab scale two-stage anaerobic digestion system was constructed including one continuously operated pressurized methane reactor. This investigation examined the effects of different operating pressures in methane reactor (10, 25, 50Â bar) on biogas quantity and quality, pH value and process stability. By increasing operating pressures in methane reactor, the pH value decreased from 6.65 at 10Â bar to 6.55 at 50Â bar. Simultaneously, methane content increased from 79.08% at 10Â bar to 90.45% at 50Â bar. The results show that methane reactors can be operated up to 50Â bar pressure continuously representing a viable alternative to commonly used gas upgrading methods because of reduced purification effort.
Journal: Bioresource Technology - Volume 232, May 2017, Pages 72-78