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Table 1 Low and high levels of medium components affecting pectinase production by A. niger according to PBED

From: Bioprocess optimization for pectinase production using Aspergillus niger in a submerged cultivation system

Factors Low level (− 1) High level (+ 1)
Pectin (g/L) 10.00 30.00
(NH4)2SO4 (g/L) 1.30 3.30
K2HPO4 (g/L) 0.50 1.00
MgSO4.5H2O (g/L) 0.05 0.50