High colour, high TDS, variable pH and temperature, surfactants and sizing chemicals — textile effluent is one of the hardest streams to treat and the most regulated. We design ETPs that meet colour and TDS norms and, where mandated, recover salt and water through ZLD.
Dyeing and printing effluent carries reactive and disperse dyes, salt (20–60 g/L in some dye baths), alkalinity from scouring and mercerising, sizing starch/PVA, and temperatures of 50–70 °C. Discharge norms add colour (often < 400 Pt-Co or 'colourless'), TDS (2,100 mg/L) and sulphate/chloride limits, and in many clusters the State Board mandates zero liquid discharge.
Sampling plan and inlet characterisation → process design (PFD, P&ID, sizing, BOQ) → supply, erection and commissioning → biological stabilisation → handover with O&M manual and training → AMC if you want us to stay. We also audit and upgrade plants built by others.
Often yes — good coagulation with the right coagulant/polymer and biological treatment remove most colour; ozone or Fenton is added for stubborn disperse and reactive dyes. Jar tests on your effluent decide.
In several clusters (parts of Gujarat, Tamil Nadu, Rajasthan, Maharashtra) the State Board requires ZLD for dyeing units above a threshold or without CETP access. Your consent states it; we design accordingly.
RO after biological treatment typically recovers 70–85 %; with ZLD, 95 %+ returns as permeate and condensate, and salt is recovered for reuse or disposal.
Flow, inlet analysis and required outlet — we reply with a scheme and budget range within one working day.