Figure 1From: A metagenomic study of the microbial communities in four parallel biogas reactorsAnaerobic process performance in R1, R2, R3, and R4 during 28 days of continuous operation (day 36 to day 59). A) Methane productions, B) % volatile solid (VS) removal, C) pH values, D) NH4+ concentrations, E) acetic acid concentration, and F) propionic acid concentration.Back to article page