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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