Polyacrylamide PAM products are widely used in specific industrial applications such as various wastewater treatment, metal smelting, paper industry, petroleum refining, sugar and pharmaceutical industries. Polyacrylamides are mainly divided into Anionic Polyacrylamide, Cationic Polyacrylamide and Non-Ionic Polyacrylamide; According to the product shape, it is divided into granular polyacrylamide PAM and powdered polyacrylamide PAM. Many customers are ignorant in choosing the suitable polyacrylamide for different types of wastewater and sewage treatment. In fact, the wrong choice not only has a poor effect, but also causes different degrees of waste, indirectly increasing the user's treatment costs.
In the anionic polyacrylamide PAM test, it is necessary to determine which manufacturer and type of polyacrylamide PAM should be chosen through experiments. The appropriate manufacturer, ion type, molecular weight, ion degree, hydrolysis degree and other characteristics need to be selected. The concentration of polyacrylamide PAM for dissolution is 0.2% -0.5%. The specific usage concentration should be determined through experiments according to the material characteristics and working conditions. The good dissolution of Anionic polyacrylamide is the key. The dissolved water must be tap water or clean water, and the dissolution temperature should be 45 minutes, but not exceed 60 minutes. The linear speed of dissolution and stirring is generally 6-8m/s.
With the continuous development of the environmental protection industry, water environmental protection has become a top priority. Of course, water environmental protection involves many aspects, such as saving water, reducing wastewater discharge, prohibiting dumping of household waste into rivers, and treating domestic sewage. Among them, wastewater and sewage treatment are important aspects of water environmental protection. They also include many links, among which polyacrylamide, polyaluminum chloride and other water purification flocculants are needed. Polyacrylamide is divided into anionic, cationic, non-ionic, and amphoteric. Polyacrylamide cationic flocculant plays an important role in sludge dewatering.
As it has many active groups, it can form hydrogen bonds through affinity and adsorption with many substances. It mainly flocculates negatively charged colloids, and has functions such as clarification, decolorization, adsorption, and adhesion. It is suitable for high content of organic colloids in wastewater treatment in industries such as printing and dyeing, papermaking, food, construction, metallurgy, mineral processing, coal powder, oil fields, aquatic product processing, and fermentation, especially for sludge dewatering of industrial sludge such as urban sewage, urban sludge, papermaking sludge, etc.
The specific dosing ratio should be determined through experiments according to the concentration and characteristics of the material to be treated. If the dosage is too high, there may even be side effects. Controlling the appropriate dosing ratio is the key to controlling costs; Polyacrylamide PAM should be fully mixed with the material. Only full mixing can ensure the subsequent dewatering effect. This is also a problem that most manufacturers are prone to. The subsequent dewatering equipment used for Anionic Polyacrylamide includes a belt press, centrifuge, plate and frame machine or natural concentration dewatering, and different dewatering equipment has different choices of polyacrylamide PAM.