Dr. Harald Schönberger TMA Karachi 2006 Wastewater fromTowel Manufacturing Industries in Karachi
Dr. Harald Schönberger TMA Karachi 2006 Site visits – March/April 2006 Benzene Feroze Shahi Mustafa Commodities Nakshbandi Yunus
Dr. Harald Schönberger Recycling without treatment Reuse of low loaded washing water underground tank filter valve Karachi April 2006
Dr. Harald Schönberger Recycling without treatment Reuse of low loaded washing water Last washing step C: 2.4 mS/cm pH: 7.5 Karachi April 2006
Dr. Harald Schönberger Sampling hours: sample every 15 minutes Karachi April 2006
Dr. Harald Schönberger Precipitation/ flocculation with Al 3+ and cationic flocculant sludge incineration or disposal on secure landfill Karachi April 2006
Dr. Harald Schönberger Lab testings on precipitation/flocculation Al 2 (SO 4 ) 3 cationic organic flocculant Polyelectr. Karachi April 2006 At RIZVI Textile Institute
Dr. Harald Schönberger Karachi April 2006 Effect of aluminium sulfate – Al 2 (SO 4 ) 3 x 18 H 2 O Al 2 (SO 4 ) 3 + 6H 2 O 2Al(OH) 3 ↓ + 3SO H +
Dr. Harald Schönberger Mechanism of cationic organic flocculants to precipitate reactive dyestuffs -- Karachi April 2006
Dr. Harald Schönberger Karachi April 2006 Dispensing the chemicals
Dr. Harald Schönberger Karachi April 2006 Filtration of precipitate
Dr. Harald Schönberger Karachi April 2006 Precipitation/ flocculation Shahi Textiles - sample from KIER
Dr. Harald Schönberger Karachi April 2006 Precipitation/ flocculation Shahi Textiles - rinsing water
Dr. Harald Schönberger Karachi April 2006 Results
Dr. Harald Schönberger Karachi April 2006 Precipitation/ flocculation Friendship composite sample Point 2
Dr. Harald Schönberger Karachi April 2006 Precipitation/ flocculation Friendship composite sample Point 4
Dr. Harald Schönberger Karachi April 2006 Precipitation/ flocculation Mustafa composite sample
Dr. Harald Schönberger Precipitation/ flocculation with Al 3+ and cationic flocculant Karachi April 2006
Dr. Harald Schönberger Karachi April 2006 Precipitation/ flocculation Nakshbandi composite sample
Dr. Harald Schönberger Karachi April 2006 COD-removal by precipitation/flocculation with aluminium sulfate and organic flocculant Shahi Textiles: 32% (493 336 mg/l) Friendship: Point 2: 57% (322 137 mg/l) Point 4: 29% (650 462 mg/l) Mustafa: 32% (839 567 mg/l) Commodities: < 10% (305 292 mg/l) Nakshbandi: no results yet First cost estimation: about 20 PKR/m 3 for chemicals (plus capital cost + sludge disposal + …)
Dr. Harald Schönberger Karachi 2006 Borewell water of seven visited industries
Dr. Harald Schönberger Karachi April 2006
Dr. Harald Schönberger TMA Karachi 2005
Dr. Harald Schönberger Karachi April 2006 Lab dyeing tests
Dr. Harald Schönberger Karachi April 2006 Applied dyestuffs
Dr. Harald Schönberger Karachi April 2006 Lab dyeings tests – example for dyeing plan (Sunfix Red S3R)
Dr. Harald Schönberger Karachi April 2006
Dr. Harald Schönberger Karachi April 2006
Dr. Harald Schönberger Karachi April 2006
Dr. Harald Schönberger Karachi April 2006
Dr. Harald Schönberger Karachi April 2006 Energy recovery
Dr. Harald Schönberger TMA Karachi 2005 Conclusions-1 SMA RIZVI Textile Institute can play an important role in wastewater treatment Introduction of wastewater and environmental issues to education of students at SMA RIZVI Textile Institute COD and colour measurement should be available SMA RIZVI Textile Institute
Dr. Harald Schönberger Karachi April 2006 Conclusions-2 Recycling of water without treatment is possible for selected streams Process water quality (bore well, IA or RO) has an impact on product quality which is so far not influencing sales
Dr. Harald Schönberger TMA Karachi 2005 Conclusions-3 Individual ETP in single cases only Meeting the standards for BOD 5 and COD, biological treatment is required ETP for a limited number of industries in one area is possible Urgent need for CETPs, for every industrial estate each For operating CETP: Industries have to comply with minimum requirements to protect the sewer system
Dr. Harald Schönberger... end... Karachi April 2006