The effect of Quansen polyacrylamide in papermaking depends on its average molecular weight, ionic properties, ionic strength and the activity of other copolymers.
The most important applications of polyacrylamide in papermaking wastewater treatment (anion polyacrylamide), fiber recycling, and post-sludge dewatering (cationic polyacrylamide).
Papermaking wastewater pretreatment process for polyaluminium chloride and anionic polyacrylamide, depending on the concentration of wasterwater agents to add quantity is different also, the higher the concentration of added amount, the greater the recommended dosage is about 10 ~ 15 PPM (0.01 ~ 0.01 kg/ton wastewater). After a period of sludge dewatering basic oven dry mud loss with cationic polyacrylamide dosage general for 3-6 kg.
The papermaking sludge was dehydrated by belt filter, which could dehydrate the sludge to water content 80% to 85%. With plate and frame filter press and wing filter press, it can dehydrate to 75%-83% water content. With the membrane filter press, the water can be dehydrated to 70%-78%