What are the issues to be mindful of when using polyacrylamide?

Those familiar with polyacrylamide know it is mainly used for wastewater treatment with significant effectiveness in preventing secondary pollution. But what should be considered when using polyacrylamide? This is a question many might not have a clear answer to. Let's shed light on it.

Floc Size: 

In wastewater treatment, polyacrylamide can adjust the size of flocs. Small flocs can slow drainage, while large flocs decrease cake dryness.

Sludge Characteristics: 

Sludge is categorized into organic and inorganic types based on its properties. Cationic polyacrylamide suits organic, and anionic suits inorganic sludge. Strongly alkaline sludge works with cationic, while anionic is for highly acidic sludge. More solid sludge generally requires more polyacrylamide.

Floc Strength: 

Polyacrylamide enhances floc stability under shear conditions.

Polyacrylamide's Ionic Degree:

For dewatering, test different coagulants' ionic degrees to choose optimal polyacrylamide. This saves costs while yielding best results.

Polyacrylamide Dissolution: 

Properly dissolving polyacrylamide maximizes its coagulation effect. To speed up, consider the right solution concentration.

These are key considerations when using polyacrylamide. Selecting varying concentrations based on these characteristics will optimize its utility.