What is PAM? For sewage treatment?

First of all, it is necessary to distinguish the sewage**, because the object of the flocculant to flocculate is the SS (suspended solid), and the interfacial charge characteristics of these SS are the main basis for the selection of flocculants. PAM is generally effective, but for SS with a negative zeta potential, it is better to use cationic PAM in less amount than anionic PAM.

Secondly, it is necessary to distinguish the place of use, and PAM may be used in two links, one is the SS removal stage, and the other is the sludge dewatering stage. The former mainly considers the performance of the product, while the latter generally uses high molecular weight cationic PAM.

The specific use of which one needs to be tested first.

Summary. PAC to be added per ton of water:

For high-color, high-concentration wastewater treatment, 700-900g of PAC per ton of water needs to be added.

When treating bromine reactive dye production wastewater, the dosage of PAC is 2kg per ton.

This depends on the concentration of suspended solids, the usual dosage is about 3% dosage 400L h, the solid is dissolved in water, and the liquid form is added to the water to be treated by measurement (3% 5%), stirring are all with, the amount of addition is determined by experiments, the best treatment between pH = 6-9, the dosage is less, the effect is good, and the effect will be better when used with organic polymer flocculant.

Can the direct addition of PAC and PAM to domestic sewage reduce COD? That is, only coagulation and sedimentation are used to treat sewage, if how much COD can be treated?

Please wait patiently for two minutes, we are sorting it out, and we will answer you immediately, and please do not end the consultation.

Yes, PAC breaks the charge balance of the system, after flocculation and precipitation with PAM, the charged colloids in the original system are flocculated, and the organic matter content is reduced, so the COD will be reduced, but not much, if the COD is very high, it will be combined with biochemical treatment, and the use of physicochemistry alone may not solve the problem.

Hope mine is helpful to you.

I have a biochemical pool here.

Then the suspended solids produced after the addition of PAC will not settle.

In the case of good proportions, it will precipitate.

Generally, the proportion of PAC added to one ton of water is about how much to add.

PAC per ton of water: 700-900g of PAC per ton of water needs to be added for high-color, high-concentration wastewater treatment. When treating bromine reactive dye production wastewater, when the dosage of PAC is 2kg per ton, it depends on the concentration of suspended solids, the usual dosage is about 3% and the dosage is 400L h, the solid is dissolved in water, and the liquid form is added to the water to be treated by measurement (3% 5%), stirring is all with, the amount of addition is determined by experiment, the best treatment between pH = 6-9, the dosage is less, the effect is good, and the effect will be better when used with organic polymer flocculant.

PAM is polyacrylamide. Polyacrylamide (PAM) is a water-soluble polymer, insoluble in most organic solvents, with good flocculancy, can reduce the friction resistance between liquids, and can be divided into four types according to ionic characteristics: non-ionic, anionic, cationic and amphoteric type.

It can be used in combination with activated carbon in raw water treatment for the cohesion and clarification of suspended particles in domestic water.

Using organic flocculant acrylamide instead of inorganic flocculant, even if the sedimentation tank is not transformed, the water purification capacity can be increased by more than 20%; In sewage treatment, polyacrylamide can increase the utilization rate of water reuse cycle, and can also be used as sludge dewatering. It is used as an important formulation agent in industrial water treatment. The application field of polyacrylamide in foreign countries is water treatment, and the application in this field is being promoted in China.

In drinking water treatment and industrial wastewater treatment, polyacrylamide can be used in combination with inorganic flocculants to significantly improve water quality. Improve floc strength and sedimentation rate. The floc formed by polyacrylamide has high strength and good sedimentation performance, which improves the solid-liquid separation speed.

One coagulation, one flocculation, one paving, one workhorse.

PAM is a high-resolution flocculant, and the organic polymer flocculant has a huge surface adsorption effect caused by the formation of larger flocs between the particles. The principle of reducing the indicators in the water is the same as above.

PAM is polyacrylamide, there are 3 main types of PAM, anion, cation, anion and ion, they are different according to the type of ion, the required solution environment is also different, the anion will be a little better under the condition of alkaline, the anion will be a little better under the condition of matching, in addition, according to the different types of ions, the use and effect are not the same, the anion is mainly coagulation.

PAC is a commonly used inorganic salt coagulant, is a polyaluminum chloride, PAM is a commonly used non-ionic polymer flocculant in China, with a molecular weight of 1.5 million 9 million, and a commercial concentration of 8.

The role of PAC is completed through the compression of electric double layer, electrical neutralization, coil net capture and adsorption bridging of its hydrolysate products, which can be precipitated and filtered out by the oxidant oxidation to cause COD, thereby reducing COD, the precipitation of particulate matter, undoubtedly reducing SS, the so-called BOD refers to the amount of oxygen required when the organic matter in the water is decomposed by aerobic microorganisms, which reflects the amount of organic matter that can be biodegraded in the water under aerobic conditions. If these organic matter are removed by precipitation, the BOD will be reduced.