Advantages and uses of polyacrylamide flocculant
Compared with polydimethylaminoethyl methacrylate flocculant, polyacrylamide has the advantages of large cation charge range, high molecular weight, wide application range and low cost. It is widely used in various industrial and domestic wastewater It is especially suitable for the treatment of organic sludge in industrial wastewater from sewage plants and chemical, petroleum or paper mills, as a biological sludge treatment, as a dewatering aid for biological sludge!
Using the cationic charge and high component of polyacrylamide PAM to neutralize the negative charge and bridging flocs during the flocculation process, the appropriate cationic charge density and molecular weight copolymer can be selected according to different treatment objects, the size of the charge density Depends on the content of cationic monomer dimethylaminoethyl methacrylate in the copolymer, for example, in the biological sludge dehydration process, using the same molecule but different cationic charge density, the results vary greatly, the dehydration effect The time required to collect 100 ml of filtrate.
When using polyacrylamide, it can be directly added to the clarified biological sludge, or it can be added to the sludge after thickening and digestion before dehydration. The added amount is 2.3~4.5kg per ton of dry sludge solids. The treated sludge can be dewatered with a belt filter, vacuum filter or centrifuge. In the belt filter dehydration, large flocs can be formed And it does not adhere to the filter cloth, so it is very popular, is a cationic polymer coagulant and flocculant commonly used in Japan!