Case study 03 / 12 · Division I
Division I · Case Study 03
Wet Textile
Phys–Chem + Bio + AOP + ZLD
Textile dyeing and finishing produce hot, alkaline, intensely-coloured effluent with high salinity and poorly-biodegradable dyes. KEMISTA combines coagulation, biology and advanced oxidation for colour, then membranes and thermal for recovery.
96%
Colour removal
85%
Water recovery
Yes
Salt recovery
Selected treatment train
Dye effluent
→
Cooling + EQ
→
Coag/Floc + DAF
→
Biological MBBR
→
Ozone / AOP
→
UF + RO
→
Reuse
Indicative influent characteristics
Flow
L/kg
100–250
pH
–
6–12
COD
mg/L
800–3,000
Colour
Pt-Co
1,000–4,000
TDS / salt
mg/L
3,000–10,000
Temp
°C
40–70
Colour reduction along the train
Colour (Pt-Co)
2,500
Raw
900
+Coag/DAF
500
+Bio
90
+Ozone
Why this configuration
Decolourisation via coagulation + ozone/AOP breaks refractory azo dyes.
High salinity handled by RO concentration and thermal crystallisation (ZLD).
Heat recovery from hot streams lowers utility demand.
Reuse-grade permeate cuts fresh-water draw in water-stressed regions.
Your sector not listed, or a stream that defies the categories?
KEMISTA characterises the stream and engineers a bespoke train — that is what bench and pilot testing are for.