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. 2014 Feb 19;9(2):e86967. doi: 10.1371/journal.pone.0086967

Figure 1. Fermenter performance.

Figure 1

pH-values, qualitative and quantitative properties of biogas (A) and concentrations of VFAs (B) during the fermentation. Gas production rate (grey background) is given in A and B to ease the comparison. Dashed lines at t = 0, 4, 18, 26, 41 outline the samples which were additionally investigated by molecular approaches.