Table 2 Composite liquor analysis for control and experimental leather processing.

From: Non-aqueous green solvents improve alpha-amylase induced fiber opening in leather processing

Parameter

Control

Heptane

Propylene glycol

PEG 200

Composite liquor#

TDS (mg/l)

35,620 ± 55

33,920 ± 82

30,960 ± 67

30,700 ± 61

Volume of effluent (L/t of raw skin)

3890

3820

3830

3830

Emission load from composite liquor (kg/t of raw skin)

TDS

138.6

129.6

118.6

117.6

  1. #Liquor collected up to chrome tanning excluding soak liquor.