Precautions for the use of cationic polyacrylamide

1, The size of floc: floc is too small will affect the speed of drainage, floc is too big will make floc bound more water and reduce the mud cookie degree. After choosing the molecular weight of polyacrylamide, the size of floc can be adjusted.

2. Sludge characteristics. First of all, it is necessary to understand the source, characteristics and composition of sludge, and its proportion. According to the different nature, sludge can be divided into organic and inorganic sludge. Cationic polyacrylamide is used to dispose of organic sludge, and the relative anionic polyacrylamide flocculant is used for inorganic sludge, cationic polyacrylamide is used when the alkalinity is very strong, while anionic polyacrylamide is not suitable when the acidity is very strong, and the amount of polyacrylamide is usually large when the solid content of sludge is high.

3, floc strength: flocs should be stable and not broken under shear.

4、Ionicity of polyacrylamide: For dewatered sludge, different ionicity of flocculant can be used to select the suitable polyacrylamide by doing a small test first, so that we can get good flocculant effect and make the dosage less and save the cost.

5、Dissolution of polyacrylamide: dissolve well in order to give full play to the flocculation effect. Sometimes need to speed up the dissolution speed, then can consider the progress of polyacrylamide solution concentration.