Wastewater quality is affected by different regions, climate, industry and pH value, which will show various and complex characteristics. In wastewater treatment, if both decolorization and sludge dewatering are needed, can polyacrylamide with different characteristics be used together and play a role at the same time? Lvyuan Environment Group Co.,Limited reminds here that different polyacrylamide agents must not be mixed. The charge carried by cationic polyacrylamide and anionic polyacrylamide are positive charge and negative charge respectively. Once they are used together, they will neutralize each other and counteract each other. On the contrary, the use effect will be greatly reduced. If it needs to be treated according to different sewage characteristics, a single polyacrylamide should be put into different stages of sewage treatment, such as anionic polyacrylamide in the primary treatment stage of urban sewage and cationic polyacrylamide in the sludge dewatering stage. This is the correct way to use. In addition, although zwitterionic polyacrylamide carries both positive and negative charges, zwitterionic polyacrylamide is not a simple combination of cationic polyacrylamide and anionic polyacrylamide, so zwitterionic polyacrylamide can not replace cationic polyacrylamide and anionic polyacrylamide respectively. Zwitterionic polyacrylamide can be used to treat the wastewater of steel plant, wool mill, etc. it can also be used to recover metals.

No matter which kind of polyacrylamide is used, the best way is to carry out the water sample experiment first and get the experimental results.