Fig. 3

Volatile fatty acid production during in-vitro fermentation. Volatile fatty acid concentrations [ppm] of fermentation fluid of vessels without (n = 3) and with (n = 3) A. taxiformis as additive, determined 4, 12, and 24 h after feeding over 4 days. a Acetic acid; b Propionic acid; c Isobutyric acid; d Butyric acid; e Isovaleric acid f Valeric acid; g Propionate/Acetate Ratio. Measurement were performed in triplicates