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Cationic polyacrylamide in treatment of sludge

  • Author:Patricia Zhao
  • Source:Original
  • Release on:2022-03-15

Anionic polyacrylamide can be used in alkaline or neutral solutions, and is commonly used in the field of sewage treatment. However, anionic polyacrylamide is not so useful to treat acidic solutions. The sewage or sludge of some factories is more complex and contains many different heavy metal ions, both negative and positive. This kind of sewage is generally treated with cationic polyacrylamide.

In industries such as coal cake dehydration in coal washing plants, vinassede dehydration in wineries, and powder cake dehydration in flour mills, the sludge composition is relatively simple and dehydration is relatively easy. It is relatively difficult to dewater the sludge of printing and dyeing plants, waste permeate sludge, and paper mills, because the sludge of printing and dyeing plants, electroplating plants, garbage treatment plants, and paper mills generally has high inert substances and high content of heavy metals. It is more difficult to treat. We can choose cationic polyacrylamide for treatment of sludge.

The following points should be paid attention to when using cationic polyacrylamide:

1. Before using, cationic polyacrylamide should be formulated into a 0.1-0.3% aqueous solution. If the concentration is too high, it will waste materials and increase the cost. Low concentration will affect the sludge treatment effect.

2. Cationic polyacrylamide can be used alone for sludge dewatering, and it can also be used in combination with polyaluminum chloride PAC, but the stirring of the two must be carried out separately.

3. To prevent moisture and avoid package damage, it should be placed in a dry, clean and ventilated place.

4. This product is lined with plastic bags, and the outer layer is packed in plastic composite film woven bags, with a net weight of 25 kg per bag.

5. In alkaline or neutral solutions, anionic polyacrylamide or non-ionic polyacrylamide can also be used to save costs (the price of anionic and non-ionic polyacrylamide is relatively much lower than that of cationic polyacrylamide).

As one of top ten polyacrylamide manufacturers in China, Shandong Welldone can provide you with cationic, anionic and nonionic polyacrylamide, which could be used in various fields, including oil and gas, municipal and industrial water treatment, mining, paper and sugar industries. If you are interested, please feel free to contact us:jack.ma@welldonechina.com