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Cautions for The Use of Polyacrylamide

The size of the floc. Too small flocs will affect the speed of drainage. If the flocs are too large, the flocs will restrain more water and reduce the dryness degree of mud biscuit. The size of the flocs can be adjusted by selecting the molecular weight of polyacrylamide.

Sludge characteristics. According to different properties, sludge can be divided into organic and inorganic sludge. Cationic polyacrylamide is used to dispose of organic sludge, while anionic polyacrylamide flocculant is used for inorganic sludge. Anionic polyacrylamide is used when the alkalinity is strong, and anionic polyacrylamide is not suitable when the acidity is strong. When the solid content is high, the amount of polyacrylamide in the sludge is usually large.

Floc intensity. The flocs should be stable and not broken under shearing action. Increasing the molecular weight of polyacrylamide or choosing an appropriate molecular structure will help improve the stability of the flocculation.

The ionicity of polyacrylamide. For dewatered sludge, flocculants of different ionicity can be selected through a small test first. Then the best and suitable polyacrylamide can be selected. In this way, the best flocculant effect can be obtained, and the dosage can be minimized, saving cost.

The dissolution of polyacrylamide. The flocculation function can be fully exerted only when it is dissolved well. Sometimes it is necessary to speed up the dissolution rate, and then the concentration of the polyacrylamide solution needs to be adjusted.

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