Polyaluminum chloride is a commonly used water treatment agent with strong flocculation and precipitation capabilities, which can effectively remove turbid substances and suspended solids from water. When using polyaluminum chloride, the following points should be noted:

1. Choose the appropriate medication model: Select the appropriate polyaluminum chloride model based on the water quality to ensure the flocculation effect.

2. Control the dosage: Based on the turbidity and suspended solids content of the water quality, the dosage of polyaluminum chloride should be reasonably controlled to avoid excessive use, waste of chemical resources, and prevent water quality problems caused by excessive use.

3. Uniform addition: When adding polyaluminum chloride, the agent should be evenly dispersed in the water to avoid local concentrations that are too high or too low, in order to ensure consistency in the flocculation effect.

4. Combination with other agents: In some cases, polyaluminum chloride can be used in combination with other agents, such as the mixture of polyaluminum chloride and polyferric chloride, which can improve the flocculation effect.

5. Mixing and precipitation time: After adding polyaluminum chloride, the water should be stirred appropriately to promote the contact and mixing of the agent with the suspended solids, and then a certain precipitation time should be maintained to allow the suspended solids to fully settle.

Polyaluminum chloride, as a commonly used water treatment agent, its correct usage and precautions are crucial for ensuring clear and safe water quality.