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Table 1 Physico-chemical characteristics of the inoculum and the reactor digestate at the start-up and steady-state conditions

From: Dynamics of Clostridium genus and hard-cheese spoiling Clostridium species in anaerobic digesters treating agricultural biomass

Sample

pH

Acetate (mg/kg)

Butyrate (mg/kg)

Total acidity (mg acetic acid eq/kg)

N-NH4+ (mg/kg)

FOS/TAC

CH4 (%)

CH4 yield (Nm3/t VS)

Inoculum

7.90 ± 0.02

123 ± 17

87 ± 3

175 ± 30

1833 ± 18

0.22 ± 0.02

60.4 ± 0.4b

67.0 ± 0.9b

Reactor start-up (days 0–9)

7.70 ± 0.02

89 ± 6

0a

89 ± 6

1740 ± 17

0.24 ± 0.02

55.9 ± 3.2

329. 2 ± 19.8

Reactor steady-state (days 10–74)

7.70 ± 0.05

82 ± 5

0a

82 ± 5

1715 ± 1

0.25 ± 0.02

53.7 ± 0.3

339.3 ± 1.4

  1. aBelow the 50 mg/kg detection limit
  2. bData obtained from BMP tests