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Waterworks low temperature low turbidity choose what medicine?

Release time: 2024-09-21

The selection of chemicals is an important link in the treatment of low temperature and low turbidity water in waterworks.

The selection of chemicals is an important link in the treatment of low temperature and low turbidity water in waterworks. Because the low temperature and low turbidity water has the characteristics of low temperature and low turbidity, the traditional coagulant may be difficult to achieve the desired treatment effect. The following are several suitable for the treatment of low temperature and low turbidity of the agent and its characteristics:

1. Polymeric aluminum chloride (PAC)

Features: Polyaluminum chloride is a commonly used inorganic polymer coagulant, which has the characteristics of fast and strong adaptability. It has a wide range of application to the pH value of raw water, and has a good treatment effect on low temperature and low turbidity water. Under low temperature conditions, by increasing the degree of polymerization of polyaluminum chloride, its coagulation effect can be improved, so that the produced alum flowers are larger and easy to settle.

Application: Polyaluminum chloride is one of the agents in the treatment of low temperature and low turbidity water in the water plant. It can not only effectively remove suspended solids and colloidal substances in water, but also improve the coagulation effect of water and reduce turbidity.

2. Polymeric ferric sulfate (PFS)

Features: Polymeric ferric sulfate is also an inorganic polymer coagulant. Compared with polymeric aluminum chloride, its hydrolysis rate is faster, the formation of flocs has large adsorption capacity, compact structure, high strength, and the sedimentation rate of coagulation is fast. In the treatment of low temperature and low turbidity water, polyferric sulfate showed good superiority.

Application: For some specific low temperature and low turbidity water, polyferric sulfate can be used as an alternative agent. Especially in the process of enhanced coagulation treatment, polyferric sulfate can significantly improve the coagulation effect and reduce the residual turbidity.

3. Mix polyaluminium chloride and polyferric sulfate

Features: In some cases, the use of a coagulant alone may not achieve a better treatment effect. In this case, a mixture of polyaluminum chloride and polyferric sulfate may be considered. By adjusting the mixing ratio and dosing sequence of the two, the coagulation effect can be further improved and the treated water quality can be more stable.

Application: When polyaluminium chloride and polyferric sulfate are mixed, it is recommended to add polyferric sulfate and stir fully before adding polyaluminium chloride. This can make full use of the advantages of the two, the formation of larger, more dense alum flowers, improve the sedimentation rate and treatment effect.

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