Textile effluents dbt meeting 16.1.2006

Characterization and treatment of textile chemical processing effluents R.B.Chavan Department of Textile Technology Indian Institute of Technology Hauz-Khas, New Delhi 110016 E-mail rbchavan@hotmail.com

Environment pollution in India ,[object Object],[object Object],[object Object],[object Object]

Environment pollution in India ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Water consumption in textile industry ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Characteristics of textile effluents ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Methods resolving effluent problems ,[object Object],[object Object],[object Object],[object Object],[object Object]

Methods resolving effluent problems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Tolerance limits for industrial effluents Absent Absent Absent Absent Pesticides mg/l 5 - - 2 Sulphides mg/l 15 - 15 5 Zinc mg/l 3 - 3 3 Copper mg/l 1.0 - 2 0.1 Hexavalent chromium mg/l 250 - - 250 COD 100 100 350 30 BOD (5 days ) 20 10 20 10 Oil and grease mg/l 45 - 45 40 Temperature 0C Max. 5.5-9 5.5-9 5.5-9 5.5-9 pH - 2100 2100 2100 Dissolved solids (TDS, mg/l m - 200 600 100 Suspended solids (mg/l ) Colourless Colourless Colourless Colourless Colour and odour Into marine Coastal areas On land for irrigation Into public sewer Into inland surface water Characteristics

Effects of effluent disposal ,[object Object],[object Object],[object Object],[object Object],[object Object]

Effects of effluent disposal ,[object Object],[object Object],[object Object]

Steps involved in effluent treatment ,[object Object],[object Object],[object Object]

Primary treatment ,[object Object],[object Object]

Secondary treatment ,[object Object],[object Object],[object Object],[object Object],[object Object]

Common effluent treatment plants ,[object Object],[object Object],[object Object],[object Object]

Tertiary treatment ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Criticism of Reverse osmosis ,[object Object],[object Object],[object Object],[object Object],[object Object]

Circumstances under which reverse osmosis can be used economically and efficiently ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RO of Rinsed water from dyeing

Other alternatives for RO ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Adsorption on activated carbon bed

Waste minimization ,[object Object],[object Object],[object Object],[object Object],[object Object]

Advantages of cleaner production ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Advantages of cleaner production ,[object Object],[object Object],[object Object],[object Object]

Pollution prevention ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Pollution prevention ,[object Object],[object Object],[object Object],[object Object],[object Object]

Pollution prevention Strategy ,[object Object],[object Object],[object Object]

Pollution prevention Strategy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Pollution prevention Strategy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Pollution prevention Strategy ,[object Object],[object Object],[object Object],[object Object]

Reducing Chemical Consumption ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Water conservation in silk processing ,[object Object],[object Object],[object Object],[object Object]

Degumming Methods ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Dyeing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object]

Reduction of water consumption Wash Wash Degumming

Reduction of water consumption Exhaust dyeing Rinse Rinse Rinse Recycle for rinsing subsequent dyeing

Textile effluents dbt meeting 16.1.2006

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Textile effluents dbt meeting 16.1.2006