The dosage of polyacrylamide (PAM) in different fields needs to be adjusted according to factors such as water quality, process, molecular weight, etc. The following is the reference range and key information integration of typical application scenarios:

1. Water treatment field

• Industrial wastewater treatment

Coal washing wastewater: The dosage is about 30-110 kg/thousand tons of wastewater. It is necessary to select a cationic or anionic type with a molecular weight of 12 million to 16 million according to the water quality.

Chemical wastewater: The dosage is generally 50-120 kg/thousand tons of wastewater, which needs to be adjusted according to the type of pollutants.

Bleaching/dyeing/papermaking wastewater: Due to the complexity of pollutants, the dosage is relatively high, about 100-300 kg/thousand tons of wastewater.

Electroplating wastewater: It is recommended not to exceed 50 kg/thousand tons of wastewater to avoid excessive impact on water quality.

• Urban sewage and sludge dehydration

Sludge dehydration: The recommended dosage of cationic type (ionic degree 40-50) is 4 kg/ton of dry sludge, which needs to be adjusted in combination with sludge moisture content, filter pressing process, etc.

Domestic sewage: Usually the solution is prepared at a concentration of 0.1-0.2%, and the dosage is 2-5 g/ton of water (such as biochemical process).

2. Mining and construction fields

• Mineral processing and sand washing

Coal sludge water treatment: The dosage of anionic type is about 4 g/ton of water, which needs to be adjusted in combination with flocculation effect

Sand and gravel sand washing wastewater: The dosage is about 5-10 g/ton of water, which can significantly improve the sedimentation efficiency .

• Concrete additives

When used as a thickener, it is usually added at a ratio of 1.2 kg/ton of concrete, and a high molecular weight model needs to be selected to increase viscosity.

3. Oilfield and Agriculture

• Oilfield Exploration

When used to enhance the permeability of oil layers, the amount of cationic type needs to be determined through experiments, and usually the adsorption stability and oil well conditions need to be considered.

• Soil Improvement

When preventing soil erosion, the recommended application amount is 10 mg/kg soil (US standard), which needs to be dynamically adjusted in combination with soil salinity.

4. Other Industrial Applications

Paper Retention/Filtration Aid: The dosage is about 5-10 g/ton of pulp, which can increase the fiber retention rate.

Food/Cosmetics Thickening: Prepare the solution at a concentration of 3‰, and the specific dosage needs to be adjusted according to the product viscosity requirements.

5. Precautions

Dissolution and Concentration: PAM needs to be prepared into a 0.1-0.2% solution for use. Insufficient or excessive dissolution will affect the effect.

Molecular Weight Selection: For example, it is recommended to use a molecular weight of 8 million to 12 million for sludge dewatering, while industrial wastewater requires a higher molecular weight.

Dynamic adjustment: The actual dosage needs to be determined through beaker experiment combined with water quality testing to avoid excessive dosage leading to increased costs or secondary pollution.