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Wednesday, August 27, 2008

latest technology dye waste water treatment ZERO discharge

Effluents are segregated into dye bath wastewater and wash water and treatment is effected

accordingly.

Wash water is collected in holding tanks and pumped to primary treatment unit (lime and

ferrous sulfate slurries are flash-mixed with effluent and allowed for settling). Following

primary treatment the effluent is carried to pressure sand filter, iron removal filter, ion

exchange filter and reverse osmosis (RO) system. Double stage RO system (each with six

membranes) with spiral wound membrane is in operation. Pump pressure is maintained in

the range of 21.2–28.2 kg/cm

2

. Rejects of first RO is sent to second RO and the final reject

(20%) is sent to MEE. Condensate water is recycled in the cleaning operations. Outlet with

100 g/L solid content is allowed for solar evaporation and the combined permeate is used in

the process. Dye bath water is collected in a separate tank and are subject to nanofiltration

after following pre-filtration. Total reject of about 30% is sent for multi effect evaporation

and solar evaporation systems. The permeate is used for preparation of dye bath solution

Saleem Asraf Syed Imdaadullah
Mobile : 9899300371
311/22,Zakir Nagar,New Delhi-110025
email: saleemasraf@gmail.com
BLOG: http://saleemindia.blogspot.com

1 comment:

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