Application of polyacrylamide in the treatment of industrial sewage, urban sewage and river raw water
Polyacrylamide PAM is a kind of polymer, which is divided into two kinds of structure: linear and mesh. Cationic polyacrylamide is reticular structure, anionic polyacrylamide and non-ionic polyacrylamide is linear structure. Polyacrylamide PAM in the field of water treatment application industry and use model. These types of polyacrylamide in the field of water treatment is very widely used, with: good effect, wide range of application, high efficiency, small dosage, low cost, safety and other characteristics.
The sewage of each industry is applicable to the polyacrylamide model is one to two.
Roughly divide the field of sewage treatment, can be simply divided into: urban sewage treatment, industrial sewage treatment, river raw water treatment. For these three areas of sewage treatment, the applicable polyacrylamide models are different.
The following is our classification and description of the types of polyacrylamide used in the three fields, as follows:
1. Urban sewage treatment
In urban sewage treatment, there are two places where polyacrylamide is used, which are: pretreatment and sludge dewatering in the early stage. In the early stage of pretreatment, polyaluminum chloride and anionic polyacrylamide will be added to the water for flocculation and precipitation; In the later stage of sludge dehydration, cationic polyacrylamide will be used.
In urban sewage treatment, the recommended use of polyacrylamide: 112-18 million molecular weight anionic polyacrylamide, 40, 50, 60 degrees of cationic polyacrylamide.
2, industrial sewage treatment
Industrial effluents include many kinds. For organic wastewater, the use of cationic polyacrylamide; For acidic wastewater, the use of non-ionic polyacrylamide; Anionic polyacrylamide is selected for inorganic near neutral wastewater. Of course, in order to ensure that each customer can choose the best type of polyacrylamide products, we recommend that you have our technicians to test the water quality, and then select the type.
In industrial wastewater treatment, the recommended use of polyacrylamide is: 8-18 million molecular weight anionic polyacrylamide, 6-12 million non-ionic polyacrylamide, 5-60 degree cationic polyacrylamide.
3, river raw water treatment
River water, river water, lake water contains a lot of sediment, solid suspended matter, especially the Yellow River water, sediment content is very large. Polyaluminum chloride and anionic polypropylene are used for flocculation and precipitation treatment.
River raw water treatment is recommended to use potable water grade polyaluminum chloride (spray 30%, 30% plate frame), low residual single content anionic polyacrylamide products.
The type of polyacrylamide used in different industries varies greatly.