3.3. Recovery from inhibition (weeks 7–10)
To allow the microbial communities to recover from inhibition,
it was decided to stop feeding the digester until excess VFA were
biodegraded. No waste was introduced over a 4-week period
(weeks 7–10).
Biogas production and its composition were still measured and
analyzed, however, during this stage. It was observed that biogas
production increased progressively after week 8 (Fig. 2) with a
strong increase of methane content (Table 5), indicating a good
recovery of methanogenic activity. This was confirmed by the