Water treatment cost reduction is now a board-level priority for Ecuador's manufacturing and processing sector. By switching to high-efficiency polyaluminium chloride (PAC) and polyamine coagulants, industrial plants across Quito, Guayaquil and Ambato are reporting up to 30% lower chemical spend, reduced sludge volumes and measurable ROI within the first operating quarter.
Polyaluminium chloride (PAC) is an inorganic polymeric coagulant with a high Al2O3 content (typically 28–31%). Compared with traditional aluminium sulphate, PAC delivers faster floc formation, works across a wider pH range (5.0–8.5) and generates significantly less sludge. Polyamine (a cationic organic polymer) acts as a coagulant aid that neutralises negative colloidal charges before, or alongside, primary coagulation.
| Parameter | Standard Alum | High-Efficiency PAC |
|---|---|---|
| Effective pH range | 6.0–7.5 | 5.0–8.5 |
| Dosing (typical) | 120–180 ppm | 40–80 ppm |
| Sludge volume | High | -30% to -45% |
| Floc settling speed | Slow | Fast |
Rising energy tariffs, stricter Norma de Calidad Ambiental enforcement and volatile aluminium prices are squeezing margins. The core advantages of a high-efficiency programme are:
Begin with a jar test using your actual raw water: measure turbidity (NTU), colour (Pt-Co), COD and pH. Establish the baseline PAC dose, then run a polyamine dose-response curve. Most plants find a 10:1 to 20:1 PAC-to-polyamine ratio (by active mass) gives the best cost-performance balance.
Introduce PAC at the rapid-mix stage (G-value 300–600 s⁻¹ for 10–30 s) and polyamine at the slow-mix/flocculation stage (G-value 20–70 s⁻¹). A controlled dosing pump with inline turbidity feedback prevents over-dosing — the single most common cause of wasted chemical.
Track cost per m³ treated (US$/m³), not just ppm. Review weekly. As source water changes between the rainy and dry seasons, re-tune the PAC:polyamine ratio; a 15–25% dose reduction is frequently achievable once the system stabilises.
Q1. How much can PAC really save vs. alum?
Most Ecuadorian plants measure 20–35% lower total chemical cost, driven by lower dosing plus reduced sludge disposal fees.
Q2. Is polyamine safe for discharge?
Yes when dosed correctly. Use food-grade or compliant cationic grades and keep residual polymer below your local discharge limit.
Q3. What PAC grade should we choose?
For high-turbidity industrial water, a spray-dried PAC with 30% Al2O3 is usually optimal. Lower grades suit lighter loads.
Q4. How fast does the switch pay back?
Typical payback is 1–3 months based on chemical savings alone; sludge reduction shortens it further.
Q5. Can PAC and polyamine be stored together?
No. Store separately and never pre-mix concentrated solutions — inject them at different stages of the process.
Q6. Do you supply Ecuador directly?
Yes. We ship bulk volumes to Guayaquil Port with full COA, MSDS and technical support for on-site commissioning.
A structured PAC and polyamine programme is one of the fastest, lowest-risk ways for Ecuadorian industry to cut water treatment costs. With correct jar testing, staged dosing and continuous monitoring, a 30% reduction is realistic — not aspirational. Contact our technical team for a free water analysis and dosing recommendation tailored to your plant.
