Effluent Dosing Pumps (WWTP & Industrial Treatment)
Hit permit limits with repeatable dosing for coagulants, polymers, pH trim and disinfection. We build digital diaphragm metering for acids/caustics/oxidants, peristaltic for neat/emulsion polymer and shear‑sensitive fluids, progressive‑cavity for viscous polymer transfer, and mag‑drive sealless sets for safe chemical handling. Brands: LMI (incl. KML/KBL), Walchem, Neptune, Emec, Grundfos, Finish Thompson, Iwaki, Flux, Netzsch and J.L. Wingert.
Best‑Fit Pumps for Effluent Dosing
| Chemical / Duty | Best Pump Type | Recommended Brands | Why It’s Best |
|---|---|---|---|
| Alum, ferric chloride, caustic, acid | Digital diaphragm metering | LMI PD/TD, Walchem EWN, Neptune 500/600, Emec, Grundfos DDA/DMX | High turndown; PVDF/PTFE wet ends; pulse/4–20 mA, flow verification |
| Hypochlorite dose & dechlorination | Digital diaphragm (degassing head for hypo) | LMI PD, Walchem EWN, Emec, Grundfos DDA | Degassing heads prevent vapor lock; accurate residual control |
| Neat/emulsion polymer dosing | Peristaltic | LMI KML / KBL | Low shear; easy tube swaps; steady at low flows to floc tanks |
| Polymer makedown feed / viscous transfer | Progressive‑cavity | Netzsch | Stable, low‑shear flow for activated polymer and high viscosity |
| Chemical transfer from bulk to day‑tanks | Mag‑drive sealless centrifugal (PP/PVDF/ETFE) | Finish Thompson DB/UC, Iwaki MX/MD | No mechanical seal → fewer leaks; excellent compatibility |
| Drum/IBC unloading | Drum/IBC pump | Flux F‑Series | Ergonomic unloading; quick tube changes; XP options |
| Verification & injection hardware | Tanks, calibration columns, injection quills | J.L. Wingert | Stabilizes dosing and provides auditable calibration data |
Recommended Dosing Packages (Placeholders)
Tip Send chemical list with SDS, temperature, target flow/pressure, turndown range, control signals (pulse/4–20 mA), and proximity to the injection point. We’ll return a complete, code‑ready BOM.
How We Engineer Effluent Dosing
- Accuracy—back‑pressure/relief valves, calibration columns and, where required, flow verification.
- Compatibility—PVDF/PTFE wet ends for oxidants/acids; elastomers by SDS and temperature.
- Polymer handling—low‑shear peristaltic for neat/emulsion; PC for viscous polymer transfer.
- Controls—dose‑to‑flow/residual, pulse/4–20 mA from PLC/SCADA, alarms and interlocks.
- Installation—flooded suction where possible, short suction lines, vertical discharge on metering heads.
Common Effluent Dosing Uses
- Primary/secondary clarifier coagulants
- Polymer feed to floc tanks & dewatering
- pH neutralization (acid/caustic)
- Hypo dose & dechlorination
- Filter aid & tertiary polishing
- Nutrient trim (N/P)
- Odor/corrosion control
- Chemical transfer to day‑tanks
- Calibration & compliance records
- SCADA interlocks & alarms
Accurate Dosing, Compliant Effluent
Send flow window, discharge pressure, chemical list with SDS, control signals and installation sketch. We’ll quote a reliable dosing package with curves and documentation.
Effluent Dosing FAQs
Peristaltic or diaphragm for polymer dosing?
Use peristaltic (LMI KML/KBL) for neat/emulsion polymer at low flow—low shear and easy tube swaps. For viscous polymer transfer to makedown, use progressive‑cavity.
How do I prevent metering pump vapor‑lock on oxidants like hypo?
Specify degassing heads, flooded suction, short suction runs and a back‑pressure valve with vertical discharge. These keep checks seated and gas free.
What accessories improve dosing accuracy?
Back‑pressure and relief valves, calibration columns, pulsation dampeners (as needed) and correctly sized injection quills. We’ll match each to your pipe size and velocity.