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Table 5 Yields and maintenance coefficients for acetate and propionate enriched cultures for the different feeding conditions

From: Metabolic modelling of polyhydroxyalkanoate copolymers production by mixed microbial cultures

Cultures enrichment

Acetate

Propionate

Substrates

Acetate

Propionate

Mixture

Acetate

Propionate

Mixture

Y X, Ac/S

0.66 (0.01)

-

0.72 (0.03)

0.52 (0.03)

-

0.50 (0.10)

Y X, Prop/S

-

0.56 (0.04)

0.78 (0.02)

-

0.51 (0.02)

0.57 (0.10)

Y PHB/S

0.76 (0.01)

0.75 (0.02)

0.84 (0.01)

0.68 (0.02)

0.71 (0.01)

0.71 (0.06)

Y PHV/S

-

0.73 (0.02)

0.80 (0.01)

-

0.70 (0.01)

0.69 (0.06)

Y PH 2MV/S

-

0.72 (0.02)

0.78 (0.01)

-

-

-

m S

0.0037 (0.0002)

0.0091 (0.0010)

0.0034 (0.0003)

0.0065 (0.0008)

0.011 (0.001)

0.0079 (0.0025)

Y X, Ac/O 2

1.90 (0.11)

-

2.00 (0.19)

1.09 (0.13)

-

0.86 (0.40)

Y X, Prop/O 2

-

0.93 (0.12)

2.56 (0.26)

-

0.79 (0.04)

1.10 (0.51)

Y PHB/O 2

5.06 (0.30)

2.28 (0.29)

5.83 (0.58)

2.92 (0.36)

1.94 (0.10)

2.51 (1.16)

Y PHV/O 2

-

2.52 (0.32)

6.32 (0.63)

-

2.15 (0.11)

2.72 (1.26)

Y PH 2MV/O 2

-

2.71 (0.35)

6.69 (0.66)

-

-

-

m O 2

0.0037 (0.0002)

0.011 (0.001)

0.0037 (0.0003)

0.0065 (0.0008)

0.0120 (0.0006)

0.0086 (0.0027)

  1. The confidence bounds of the theoretical yields were obtained by error propagation of P/O ratio (δ)