Polyacrylamide(PAM) is a widely used flocculant in wastewater treatment. Its dissolution quality directly affects chemical consumption costs and effluent quality.Henan SeccoEnvironmental Technology Co., Ltd. (hereinafter referred to as "Secco Environmental"), professional manufacturer and supplier of PAM,chloridus polyaluminium(PAC),polyferrik sulfate(fs-type)and other flocculants and coagulants, has summarized proven methods to improve PAM dissolution and usage efficiency, helping clients reduce waste and enhance flocculation performance.

1. Common Problem: Why Does PAM Form "Fish Eyes"?

Cum pulverem PAM aquae connectat, superficie eius celeriter crescet et gelum format, prohibente ultra penetrationem aquae et resultat in semi-transparentem particulas gel-similes ("oculi piscium"). These not only waste chemicals but also clog dosing pumps and pipelines, affecting system stability.

2. Core Techniques for Efficient Dissolution

2.1 Metodo nutritionis recta

Cum mixtor currit, lentem et evenlum pulverem PAM aspersit in extremis vertex. Never dump a large amount at once.

Secco Environmental recommendation: Pre-wet the powder with a small amount of industrial alcohol or glycerin before adding it to water. Hoc significantem agglomerationem reducit.

2.2 Temperatura et qualitate aquae

Temperatura optima: 35–60   °C

Avoid: Below 5   °C (extremely slow dissolution) or above 60   °C (thermal degradation, loss of viscosity)

Qualitate aquae: Avoide acidas fortissimas, bases fortissimas, aut aquam salinitatis altissimas. Iron ions catalyze PAM degradation – use stainless steel, plastic, or FRP tanks.

2.3 Dissolution Time and Stirring Speed

Velocitate stirring: 60–120 rpm – excessiva calices molecularum fregit.

Tempus dissolutionis Typica: 40–60 minutas (typi anionis modo celerior dissolvent quam typi cationici).

3. Methodi avantiatae dissolutionem et utilizationem

✅ Pre-wetting (oil-based dispersion)

Pre-wetting PAM pulvere oleo albo aut liquido hydrocarbonum non cessat gelationem superficie super contactum aquae. Secco Environmental's on-site tests show this method can reduce dissolution time by up to 80% , especially in high-salinity or seawater-based solutions.

✅ Dissolution aids

Adding a small amount of monoethanolamine (MEA) or urea to the dissolution water extends PAM molecular chains, promoting faster dispersion.

✅ Specialized dissolution equipment

A jet-type dissolution unit uses high-pressure water shear to instantly disperse powder – ideal for large-scale, continuous dosing systems.

4. Magnificans effectivitatem utilitationis: Parametri clave operationis

5. Secco Environmental Special Reminder: Recommendations by Sludge Type

Municipal sludge: Cationic PAM, ionic degree 30–50%

Vatica lavanda collo: PAM animantica, pesma molecula > 12 miliones

Papermill wastewater: Non-ionic or low-anionic PAM

Industrial mixed sludge: Use PAC or PFS as primary coagulant + PAM as flocculant aid

For a dosing proposal tailored to your specific water quality, please contact the technical department of Henan Secco Environmental Technology Co., Ltd. We offer free lab‑scale jar tests and on‑site guidance.