Cationic Polyelectrolyte Flocculant — Sludge Dewatering

Cationic polyelectrolyte (DWP / Poly Electro grade) from Drashti Chemicals bridges the gap between primary coagulation and belt-press dewatering at textile, pharma, and food ETPs across Gujarat. These high-molecular-weight polymers carry positive charge that neutralises anionic colloids and bio-sludge, forming macro-flocs that settle in 15 minutes and press to 18–22% cake solids. Without polyelectrolyte, your DAF or clarifier may hit design load while effluent TSS still fails consent.

Charge density and molecular weight define grade selection. Low-charge, high-MW cationic suits sludge conditioning before centrifuge; medium-charge cationic covers mixed industrial effluent after PAC or ferric dose; high-charge cationic targets anionic dye molecules in reactive-dye wastewater. Drashti stocks DWP and Poly Electro equivalents — share your effluent zeta potential or simply send a 5 L sample for beaker-jar optimisation. COA confirms charge density and viscosity.

Make-down concentration is the critical operating variable: 0.1–0.5% stock solution prepared in RO or soft water with 45–60 minutes maturation at slow stir (40 rpm). Never use hard water above 200 ppm CaCO₃ — calcium bridges polymer chains and kills floc strength. Dose 1–10 mg/L active polymer after coagulant flash mix. Overdosing re-stabilises colloids and raises TSS — if effluent clarity worsens after increasing dose, you are past the optimum.

Supplied as powder in 25 kg Kraft-lined bags or as 25 kg emulsion drums (ready-to-dilute). MOQ: 5 kg repack for trial; bulk quote on request for 500 kg+ monthly. MSDS and COA per batch. Store powder below 30 °C, emulsion above 5 °C — frozen emulsion cannot be recovered. Drashti Vadodara (GST 24AGLPC6288M1ZX) dispatches across Surat, Ahmedabad, and Rajkot industrial zones.

Cationic vs. anionic polyelectrolyte: cationic after inorganic coagulant for positive-neutral-negative floc cascade; anionic for oily emulsion breaking and deoiling (see our Deoil Poly grade). Cationic vs. non-ionic: non-ionic only for acid-leach or extreme pH where ionic charge is shielded. Pair cationic polymer with PAC rather than ferric when sludge volume and chloride load are your constraints.