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Table 2 Average concentrations, volumetric productivities and relative product selectivities of n-valerate during the steady-states of phase III (day 78–90) (pH 5.8) and phase IV (day 111–120) (pH 5.5) of continuous methanol-based propionate elongation and during the steady-state of phase V (day 64–71) (methanol in influent 250 mM) and during the last days of phase VI (day 97–104) (methanol in influent 400 mM) of continuous methanol-based propionate and acetate elongation in an anaerobic open-culture reactor at 309 K

From: Continuous n-valerate formation from propionate and methanol in an anaerobic chain elongation open-culture bioreactor

  Propionate; pH 5.8; 250 mM methanol Propionate; pH 5.5; 250 mM methanol Propionate and acetate; pH 5.8; 250 mM methanol Propionate and acetate; pH 5.8; 400 mM methanol
Average n-valerate concentration (mM) 37.1 ± 0.9 38.4 ± 1.4 33.9 ± 2.3 42.8 ± 0.7
Average n-valerate productivity (mmol/L/day) 9.3 ± 0.2 9.7 ± 0.4 9.0 ± 1.0 11.5 ± 0.2
Average n-valerate selectivity (wt%) 58 70 49 43