existWastewater treatment UV moduleIn processing, using a single flocculant sometimes cannot achieve good coagulation effect, and it is often necessary to add some additives to improve the coagulation effect. This type of coagulant aid is called a coagulant aid. Common coagulants include chlorine, lime, activated silica, bone glue and sodium alginate, activated carbon, and various clays. Some coagulants themselves do not have a coagulation effect, but by adjusting and improving coagulation conditions, they can exert their coagulation effect. Some coagulants participate in the formation of flocs, improving their structure and transforming the fine and loose flocs produced by inorganic coagulants into dense alum flowers.

Most of the synthesized organic polymer flocculants are polypropylene and polyethylene, such as polyacrylamide, polyethyleneimine, etc. These flocculants are water-soluble linear polymer materials, each composed of many repeating units containing charged groups, and are therefore also known as polyelectrolytes. Cationic polyelectrolytes containing positively charged groups and anionic polyelectrolytes containing negatively charged groups both contain positive and negative groups, and are called non-ionic polyelectrolytes.

Currently, more polymer flocculants are being used as anions,Water self cleaning sterilizerIt can only assist in the coagulation of negative ion colloidal impurities in water. Usually cannot be used alone, but is mixed with aluminum salts and iron salts. Cationic flocculants can simultaneously act as coagulants and flocculants, and can be used alone, thus achieving rapid development. Polyacrylamide non-ionic polymers are widely used in China and are often combined with iron and aluminum salts. By utilizing the electric neutralization effect of iron and aluminum salts on colloidal particles and the excellent coagulation effect of polymer flocculants, satisfactory treatment results can be obtained. Polyacrylamide has the characteristics of low dosage, fast coagulation speed, high floc strength and toughness. 80% of the synthetic organic polymer flocculants produced in China belong to this type of product.