Enhancing methane production during the anaerobic digestion of crude glycerol using Japanese cedar charcoal

- The use of Japanese cedar charcoal as a support could enhance methane production.
- It was achieved to operate the highest OLR of crude glycerol in the previous studies.
- Methane production yield containing charcoal was about 1.6 times higher than without.
- Propionate degradation was enhanced on charcoal by attached microorganisms.
- The use of Japanese cedar charcoal in anaerobic digestion is a sustainable practice.