Module 5 : Major Sources of Water Pollution

Lecture 4 : Dying and Tanning

 

Water Usage in Dyeing

• Clean Equipment

• Cooling Water

• Rinsing

• Processing Dyes

• Processing Products

Wastewater

• High COD and BOD

• Particulate matter and sediments

• Oil and grease

• Chromium

• Turbid

Wastewater Treatment

• Physicochemical wastewater treatment

• Biological wastewater treatment

• Biochemical and physicochemical combination process

• Cutting-edge treatment process

Physicochemical Wastewater Treatment

• Equalization and homegenization

• Floatation

• Coagulation flocculation sedimentation

• Chemical oxidation

– Fenton reaction

– Ozone oxidation

• Adsorption

• Membrane Separation Process

– Reverse Osmosis

– Nanofiltration

– Ultrafiltration

– Microfiltration

Biological Wastewater Treatment

• Aerobic biological treatment

– Activated sludge process

– Biofilm

• Anaerobic biological treatment