Abstract / Description of output
Anaerobic digestion of aqueous pyrolysis liquor derived from pyrolysis of solid digestate was tested in batch mode using an un-adapted inoculum. Three pyrolysis liquors produced at 330°C, 430°C and 530°C in four COD-based concentrations of 3, 6, 12 and 30gL-1 were investigated. The three lower concentrations showed considerable biogas production, whereas the 30gL-1 dosage caused process inhibition. The highest methane yield of 199.1±18.5mLgCOD -1 (COD removal: 56.9±5.3%) was observed for the 330°C pyrolysis liquor, followed by the 430°C sample with only slightly lower values. The 530°C sample dropped to a yield of 129.3±19.7mLgCOD -1 (COD removal: 36.9±5.6%). Most VOCs contained in the pyrolysis liquor (i.e. furfural, phenol, catechol, guaiacol, and levoglucosan) were reduced below detection limit (cresol by 10-60%). Consequently, integrated pyrolysis and anaerobic digestion in addition to thermochemical conversion of digestate also promises bioconversion of pyrolysis liquors.
| Original language | English |
|---|---|
| Pages (from-to) | 86-92 |
| Number of pages | 7 |
| Journal | Bioresource technology |
| Volume | 183 |
| DOIs | |
| Publication status | Published - 1 May 2015 |
Keywords / Materials (for Non-textual outputs)
- Anaerobic digestion
- Biocrude
- Detoxification
- Process integration
- Pyrolysis