Table 1 Analysis of degradation degree of waste liquor after tanning with different tanning agents

From: Chitosan based chromium free tanning system for reducing the carbon footprint to leather production process

Sample

Al2(SO4)3⋅18H2O

TWS

COS-E-Al

COS-T-Al

COS-R-Al

BOD5(mg/L)

2555

5880

441

780

966

CODCr(mg/L)

8859

20891

1161

2107

2759

BOD5/CODCr

0.29

0.28

0.38

0.35

0.35

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