Long-term stability of thermophilic co-digestion submerged anaerobic membrane reactor encountering high organic loading rate, persistent propionate and detectable hydrogen in biogas

- Long-term stability of thermophilic submerged AnMBR was evaluated.
- Amendment of pH buffer was obligatory for co-digestion system.
- The effect of H2 partial pressure on propionate accumulation was confirmed.
- Results of 16SrDNA show that propionate-oxidizing bacterium was insufficient.