INDEX OF CONTENTS
1. What is 'C O L O U R' ? 1
2. Why measure colour? 1
3. What causes 'colour' in waste water? 2
4. 'Colour' in waste water an environmental dilemma 3
5. Colour concept 4
6. Types of colour 5
6.1 Apparent colour 5
6.2 True Colour 5
7. Analytical Methods for colour measurement 5
7.1 Colour measurement - apparent colour 5
7.2 Colour measurement - true colour 6
7.1.1 Comparator methods 7
7.1.2 Colorimetric methods 7
8. Regulatory norms for Colour removal 8
8.1 Global regulatory norms for Colour removal 8
8.2 Regulatory norms for Colour removal in India 9

9. De-colourisation technologies for waste water 12
9.1 Mechanical treatment 13
9.2 Biological treatment 13
9.3 Chemical degradation techniques 13
9.4 Physical treatments 13
10. Colour removal practices in industrial waste water 14
in India
10.1 India a 'Speciality Chemical'hub - colour removal in
Dye manufacturing units 14
10.2Colour removal practices: Textile sector 16
10.3Colour removal practices: Pulp & paper mills 19
10.4Colour removal practices : Tanneries 22
10.5Colour removal practices : Distilleries 25
11. 'Colour' management by SAAEs clusters &CETPs 26
12. Challenges to'colour' removal 30