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Table 2 Comparison of the carbon source cost in different glutamate-independent strains to produce 10 kg γ-PGA

From: Production of poly-γ-glutamic acid by a thermotolerant glutamate-independent strain and comparative analysis of the glutamate dependent difference

Strains

Carbon source

Cost saving (%)a

Types

Price ($ t−1)

Amount (kg)

Cost ($)

B. amyloliquefaciens LL3

Sucrose

1054

113.64

119.78

93.75

B. licheniformis A35

Glucose

584

62.50

36.50

79.48

B. subtilis TAM-4

Glucose

584

33.94

19.82

62.21

B. subtilis C10

Glucose

584

28.88

23.18

67.69

Citric acid

875

7.22

B. subtilis GXG-5

Glucose

584

12.82

7.49

  1. aRepresented the cost saving proportion of B. subtilis GXG-5 compared with the corresponding strain