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Table 2 Percentage of dominant VFAs produced in leach-bed reactors during period 1 and 2

From: Reproducible, high-yielding, biological caproate production from food waste using a single-phase anaerobic reactor system

VFA (%)

Period 1

Period 2

Phase 1

Phase 2

Phase 3

Phase 4

Phase 5

Phase 6

Acetate

14.2 ± 2.7

29.0 ± 4.0

29.7 ± 6.0

28.4 ± 1.8

28.8 ± 6.7

36.5 ± 2.0

57.5 ± 8.5

Propionate

14.1 ± 13.3

4.4 ± 1.2

10.8 ± 0.7

12.1 ± 1.7

11.3 ± 1.2

13.1 ± 1.9

2.0 ± 1.3

Butyrate

51.0 ± 11.2

26.5 ± 1.1

25.0 ± 1.8

24.8 ± 3.0

45.0 ± 13.6

28.1 ± 2.0

32.8 ± 3.3

Caproate

11.7 ± 8.6

38.3 ± 4.3

27.2 ± 2.6

29.7 ± 0.4

13.4 ± 5.8

6.7 ± 3.1

NA

  1. NA not available because value was below detection limit
  2. All values show standard deviation with n = 3