Mumbai MIDC chemical and pharma ETPs: a guide
How chemical, pharma and textile units in Mumbai's Thane–Belapur, Taloja and Tarapur MIDC belts treat effluent before it goes to a CETP, and where polymer fits.
Effluent in the MIDC belts
The Thane–Belapur, Taloja, Ambernath and Tarapur estates host thousands of chemical, dye intermediate, pharma and engineering units. Most send pre-treated effluent to a common effluent treatment plant, which sets inlet limits each member must meet.
Meeting CETP inlet limits
CETPs typically cap suspended solids, COD, pH and specific pollutants at the inlet. Units that fail them can be penalised or disconnected, so the primary clarifier in each unit's own ETP matters. A coagulant followed by a cationic grade such as Sunfloc Cationic HQ gives a clear overflow and a compact sludge.
High-COD and Fenton streams
Pharma and dye intermediate units often pre-treat strong streams with Fenton oxidation. The iron sludge that follows settles faster with an anionic grade such as Sunfloc Anionic HQ; see our guide to settling sludge after Fenton.
Textile processing around Bhiwandi
Process houses that dye and finish powerloom fabric discharge coloured, alkaline effluent. SunDec SC05 binds dissolved dye first; a cationic Sunfloc grade then settles the combined floc.
Monsoon and space
Mumbai's monsoon is among the heaviest of any Indian city, and storm water can dilute and overload small ETPs in July and August. Plants are often cramped too, so compact, fast-settling flocs help small clarifiers keep up. Re-check doses by jar test when the rains start.
Regulation and supply
Units are regulated by the Maharashtra Pollution Control Board. Road freight from our Chennai stock usually takes three to four days, so plan orders with a margin of stock on site.
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