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Table 6 Coefficient and p values for independent variables and their interactions, obtained from optimization of fermentation conditions

From: Vinasse: from a residue to a high added value biopolymer

Variable

Coefficient

p value

C/N

− 0.5340

0.278

T

− 0.1878

0.702

t

− 2.2338

0.003

C/N-T

− 0.1580

0.756

C/N-t

1.8160

0.032

Tt

0.6016

0.370

(C/N)2

− 1.7675

0.495

T2

− 0.0898

0.901

t2

0.4981

0.495

  1. C/N carbon/nitrogen ratio; T fermentation temperature; t fermentation time