Polyacrylamide is a linear polymer with good flocculation properties and plays an irreplaceable role in the field of water treatment. Due to the high production cost of polyacrylamide (PAM) and the need for cost calculation in wastewater treatment, many people are concerned about the dosage of dry pam. So, what factors are related to the dosage of pam polyacrylamide for wastewater treatment?
The quality and concentration of wastewater in different factories have a great impact on the dosage of dry pam. For example, in the case of sand washing plants, the dosage of pam polyacrylamide varies depending on the content of sewage sludge. The same sludge content, different water quality and sediment quality in different regions can also result in different product usage. The water quality of industrial wastewater in chemical plants, pharmaceutical plants, paper mills, and other industries is much more complex than that of sand washing plants, and slight changes can cause changes in dosage.
On-site conditions include the concentration of water treatment chemicals, dissolution time, coagulation time and intensity, and the impact of process equipment. High dissolution concentration can increase the difficulty of coagulation and make it difficult to control the dosage of chemicals. Short dissolution time leads to waste of chemicals and increased usage. It is not suitable to use high molecular weight or high concentration solutions when the coagulation time is short and the intensity is low, as it may result in wasted chemicals. The impact of process equipment, such as plate and frame machines being more cost-effective than belt presses, also affects the filtering performance of different manufacturers' equipment. The above issues are just examples, in practice, operating conditions and equipment have a significant impact on the dosage of chemicals.
The type of pam polyacrylamide determines its dosage. For example, using anionic polyacrylamide with a molecular weight of 18 million and anionic pam polyacrylamide with a molecular weight of 8 million, although higher molecular weight is not always better, for most water qualities, high molecular weight products are cost-effective if used properly. The dosage of these two types of products for the same water quality is completely different, and the difference could be double or even more.
These are the factors that affect the dosage of pam polyacrylamide for wastewater treatment. It is recommended that users conduct sampling experiments and on-site testing to determine the accurate type and dosage of pam polyacrylamide in order to achieve optimal results with good effect, less usage, and lower costs.