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Polyacrylamide The Role Of
Jul 14, 2017

As the sewage treatment sometimes use polyacrylamide, Polyacrylamide and sometimes use poly aluminum chloride, since both are the role of sewage treatment. Why do you have two different categories? Of course there are two different uses of the existence of the two, when it comes to use, Polyacrylamide indeed polyacrylamide and poly aluminum chloride there are many different places. We can distinguish between the two in the use of both.

Polyacrylamide (also known as white medicine), Polyacrylamide also known as PAM, polyacrylamide is mainly used in sewage treatment, raw water treatment and industrial water treatment. In sewage treatment. Polyacrylamide can be used for sludge dewatering; in raw water treatment, polyacrylamide and activated carbon with the use of suspended solids in living water can be used for condensation and clarification; Polyacrylamide in industrial water treatment, mainly used as a formula. In the sewage treatment, the use of PAM can increase the utilization of water reuse cycle. In the raw water treatment, with the organic flocculant PAM instead of inorganic flocculant, without altering the sedimentation tank in the case, can also improve the water purification capacity of 20%. At present, Polyacrylamide many large and medium cities in the water shortage or poor water quality, by PAM to make up.

Poly aluminum chloride (commonly known as xanthate) treatment of sewage is also good, it is a wide range of applications, widely adapted to a variety of water. Can quickly form a large alum flowers, Polyacrylamide precipitation performance. Appropriate PH value range of five to nine wide, Polyacrylamide and after treatment of water PH value and alkalinity decreased. Water temperature is low, can still maintain a stable precipitation effect. Polyacrylamide Alkalinity than other aluminum salts, iron salts, the erosion of the device is small.

Polyacrylamide can be divided into anionic polyacrylamide, cationic polyacrylamide, nonionic ionic polyacrylamide and amphoteric polyacrylamide, the molecular weight of each ionic structure (such as anion) is very different, generally from 2 million to 22 million , The active ingredient content ranging from 40% to 90%, Polyacrylamide these differences directly lead to a huge difference in flocculation effect, but only from the appearance is difficult to distinguish. Such as Qingpu a company electroplating wastewater treatment process, under the same conditions to join a manufacturer of polyacrylamide, measured after precipitation, chromium ion content of up to 12mg / L, Polyacrylamide increased by 3 times the amount of chromium ions eventually reduced to only 7mg / L , Polyacrylamide Continue to increase the amount of basic no longer any effect, and will cause the increase in COD. And the addition of high-quality ultra-high molecular weight polyacrylamide, the amount of only the former 1/3, so that the chromium ion content reduced to 0.9mg / L.

1, the molecular weight is different. Polyacrylamide The current market flow of polyacrylamide industrial products, the appearance of white powder, only the naked eye can not distinguish the difference. In fact, its molecular weight is very different, generally ranging from 2 million to 22 million. The difference in molecular weight is directly related to the flocculation effect. The larger the molecular weight, Polyacrylamide the longer the molecular chain, the better the flocculation and sedimentation effect, and the higher the production cost. This is the determinant of the price.

2, solid content is different. At present, many products have been specially treated, the solid content is only about 50%, so the unit price can be reduced very low, Polyacrylamide and the appearance has not changed, Polyacrylamide the most important is the "low content of polyacrylamide has a great weakness: flocculation effect is particularly poor , Even if the increase in the amount can not change this situation, which is a very common phenomenon in reality. Such as: a battle for many years has been the use of other manufacturers of anionic polyacrylamide, Polyacrylamide in the trial of our company before high acrylamide, the company users have been that: all polyacrylamide are so, but "the treatment effect is very unstable, Sometimes the standard sometimes exceeded. "