In the process of wastewater treatment, it needs to go through a series of operation steps, and after being tested to meet the discharge standard, it is discharged. In this series of processes, the flocculant plays a vital role. The Flocculant can flocculate the suspended matter of small molecules in the water. Settling, making it easy to filter. The types of flocculants are also very rich. How to choose the flocculant that suits you is also relevant and important. Regarding the selection of flocculants, PAM and PAC manufacturers have the following suggestions:
How to choose a flocculant in wastewater treatment should be selected according to the characteristics of the wastewater in a specific industry. At the same time, it also depends on where the flocculant is added and what it is used for. Generally, when choosing an inorganic flocculant, the composition of the wastewater should be considered, and then choose a suitable one (iron salt, aluminum salt or iron-aluminum salt, silicon-aluminum salt, silicon-ferric salt, etc.); inorganic polymer flocculants include: polyaluminum chloride (PAC), polyaluminum sulfate (PAS), polyaluminum sulfochloride (PACS) and polyferric sulfate (PFS), etc. Among them, the more representative PAC and PAS have the characteristics of good adaptability to changes in water quality treated by raw water treatment chemicals, good coagulation and purification effects, and low cost of chemicals.
When choosing an organic flocculant (such as: polyacrylamide PAM), it mainly depends on whether anionic polyacrylamide, cationic polyacrylamide or nonionic polyacrylamide is used. Anionic polyacrylamides are based on the degree of hydrolysis. The selection of cations is generally used in sludge dewatering. The selection of cationic polyacrylamide is very important. Urban sewage treatment plants generally use medium-strong cationic polyacrylamide. Weak cations are generally used for sludge dehydration in papermaking and printing and dyeing plants, and pharmaceutical wastewater is generally used. Choose strong cations and so on. Each type of wastewater has its own characteristics. Non-ionic polyacrylamide is mainly used under weak acidic conditions, and non-ionic PAM is mostly used in printing and dyeing factories.
Water treatment agent suppliers suggest that the selection of all these flocculants should be determined according to the test. In the test, determine the approximate dosing amount, observe the flocculation and sedimentation speed, calculate the treatment cost, and choose an economical and applicable flocculation agent.
Post time: Dec-19-2022