ETP SYSTEM FOR TEXTILE DYEING INDUSTRIES
Textile dyeing industries need huge quantity of water for textile
dyeing, which they normally pump out repeatedly from the ground or natural
water sources resulting in depletion of ground water level.
In the dyeing process textile industries generate huge quantity of toxic
effluent containing colours, sodium sulphate, sodium chloride, sodium
hydroxide and traces of other salts. These are generated after dyeing and
after washing of garments / fabrics. After dyeing the waste water produced
is called Dye Bath water and after washing the waste water generated is
called wash water. Dye Bath contains higher solids in the range 4-5% whereas
wash water contains only 0.5-1% solids.
Based on the above mentioned fact SSP has developed a
technology which can process such harmful toxic effluent water and transform
it into reusable water. Thus the textile industries will have the advantage
of using the same water in the dying process repeatedly, also the salt used
for dyeing can be reused or sold in the market.
The technology offered by SSP can overcome all problems pertaining to
environmental pollution in respect to textile dying industries.
The basic thrust of the technology is to convert entire quantity of
effluent to zero level by separating water and salt using evaporation and
The concept and the treatment is based on the removal of the entire COD/BOD
and the condensate coming out to meet the fresh water quality requirement in
TEXTILE WASTE WATER HANDLING BY EVAPORATION AND SOLID SEPARATION BASIC
The technology is based on basic principle of reduction of
quantity by concentrating the effluent and subsequently separation of salt
THE EVAPORATION PROCESS:
Textile Effluent is fed to the vacuum evaporator to
concentrate up to 40% solids concentration. The total process is under
vacuum and the vapors generated in the system are re-used to economize steam
consumption in multiple effect evaporation system with thermal vapour
recompression system. The thermal vapour recompression system use Vapours
generated in the evaporator and compress it by steam and the compressed
vapours are used as heating medium in the evaporator, in this way steam
consumption is reduced. Water recovered from the evaporator has low COD/BOD
value and can be recycled in the plant.
(Zero Liquid Discharge Section):
The resultant slurry (concentrate) is fed to the thickener and
centrifuging section for converting the liquid concentrate to solid waste.
The mother liquor from thickener and centrifuge is recycled back to
The water separated out from evaporator is good enough in quality to
recycle in the plant for Dyeing.
- Zero Liquid Discharge
- Fully Customized Designed System
- Highest Steam Economy
- Low Operating Cost
- Less Downtime for Maintenance
- Generation of Reusable Condensate Water
- Operator Friendly