Cationic Flocculant

A: No, they cannot be mixed directly. When cationic and anionic polyacrylamide come into contact in water, charge neutralization occurs, producing white flocculent precipitates that render both products ineffective. If both need to be used in the same system, they should be added separately with adequate spacing (such as in different process stages or equipment), or a spacer fluid should be used.

A: Viscosity loss is typically caused by: excessively high dissolution water temperature (above 50°C) leading to thermal degradation; overly rapid stirring (above 500 rpm) causing shear degradation; prolonged storage after preparation (over 24 hours); presence of strong oxidants or high concentrations of metal ions in the water. It is recommended to use room temperature clean water, control stirring speed, and prepare solution as needed.

A: When water temperatures are low in winter, CPAM dissolution rate significantly decreases. Recommended measures: extend stirring time to 90-120 minutes; use warm water (not exceeding 40°C) for preparation; pre-warm the product indoors before use; consider using emulsion-type products, which offer better low-temperature dissolution performance.

A: Appropriate selection can be assessed by: moderate floc size, dense structure, clear supernatant, low cake moisture content, no filter cloth clogging, clear filtrate, low filtrate solids content, and stable filtration cycle. If flocs are too small or supernatant is turbid, ionic degree may be too low; if flocs are too large but loose, molecular weight may be too high; if filter cloth clogs severely, ionic degree may be too high.

A: CPAM used for drinking water treatment must meet national drinking water treatment chemical standards, with residual monomer content ≤0.05%. Our product strictly controls acrylamide monomer residue and undergoes regular third-party testing to ensure compliance with relevant health and safety requirements. Recommended dosage should be strictly followed to avoid overdosing.

A: High-quality CPAM features: white appearance, uniform granules, good flowability; fast dissolution, no "fish eyes" or undissolved particles; transparent or slightly turbid 1% solution without layering; during flocculation testing, rapid floc formation, dense structure, fast sedimentation; clear supernatant. Low-quality products exhibit slow dissolution, severe clumping, loose flocs, and turbid supernatant.

A: If clumping is minor and the product can still be crushed and dispersed, and after dissolution performance testing shows no significant decline, it may still be usable. If clumping is severe, product has yellowed, developed odor, or shows significant insoluble matter after dissolution, the product has deteriorated and should not be used. Strict moisture protection during storage is recommended, and opened packages should be used promptly.

A: At recommended dosages, CPAM has minimal toxic effects on microorganisms in activated sludge. At excessive dosages, the polymer may encapsulate microorganisms, affecting their metabolic activity. Optimal dosage should be determined through jar testing to avoid overdosing. CPAM is biodegradable, and its degradation products have no adverse effects on subsequent biological treatment processes.

A: Yes. CPAM and PAC exhibit good synergistic effects when used together, significantly improving treatment performance while reducing overall chemical costs. Recommended addition sequence: add PAC first with rapid mixing to destabilize colloids; then add CPAM with slow mixing to promote floc growth. Optimal ratios and addition sequences should be determined through jar testing.

A: The starch-cadmium iodide colorimetric method can be used to measure polyacrylamide concentration, suitable for low-concentration solutions. For field applications, viscosity method provides rapid estimation-under constant temperature, solution viscosity correlates positively with concentration. The gravimetric method offers precise measurement: dry a measured solution volume to constant weight and calculate solid content.

A: When temperatures exceed 60°C, CPAM molecular chains are susceptible to thermal degradation, resulting in viscosity loss and reduced flocculation performance. Recommendations: avoid direct addition at high-temperature stages; select temperature-resistant products for high-temperature applications; minimize storage time after solution preparation; control stirring speed to reduce shear degradation.

A: Opened packages should be used promptly, and remaining product should be sealed for storage. Seal the bag tightly or transfer to airtight containers, store in a cool, dry place, avoiding prolonged air exposure that may cause moisture absorption. It is recommended to purchase according to actual usage needs to avoid prolonged storage of opened packages.