Fig. 3From: Microbial population dynamics during long-term sludge adaptation of thermophilic and mesophilic sequencing batch digesters treating sewage fine sieved fraction at varying organic loading ratesVFA concentrations in the thermophilic reactor (a): batch wise feeding occurred at the even days: odd numbered days represent 24 h after feeding, while even days represent 48 h after feeding. The VFA concentrations in the mesophilic reactor (b) were measured during recovery and after the batches of FSF at day 407; hereafter even numbered days represent 24 h after feeding, while odd days represent 48 h after feedingBack to article page