company news about The Role of Polyaluminum Chloride (PAC) in Coagulation Processes

With the rapid development of the economy, water pollution has become increasingly important and has caused serious impacts on ecosystems and human health. Safe and pure water resources not only reduce environmental pollution, but are also crucial for human health. Water resources must be effectively purified before use to meet drinking water standards. The pollutants that cause turbidity in water bodies include clay minerals, silt, some organic and inorganic substances, suspended particles such as algae. These substances can be removed by coagulation flocculation method, which has the characteristics of simple operation and low cost. Polyaluminum chloride (PAC), as one of the widely used inorganic polymer coagulants, has the advantages of low dependence on temperature and pH, low sludge yield, and high turbidity removal rate.

Water treatment effect with polyaluminum chloride（PAC）

The coagulation process includes three stages: coagulation, flocculation, and sedimentation.

1) The coagulation stage caused by Brownian motion plays a major role in anisotropic coagulation. This process takes a very short time to complete, in order to make it more efficient in the subsequent stages

Particle destabilization requires sufficient dispersion of flocculants before hydrolysis reaction;

2) In the flocculation stage, the main role is shifted to co directional flocculation. Fast mixing and slow mixing are usually necessary steps in this process. In terms of coagulation efficiency, fast mixing is more important than slow mixing because coagulation requires sufficient fast mixing strength to avoid excessive hydrolysis of PAC before it comes into contact with primary particles in the raw water. However, rapid mixing with excessive strength is also detrimental to the solidification process. Therefore, appropriate

Rapid mixing intensity is crucial for achieving optimal performance of polyaluminum chloride (PAC);

3) In the settling stage, the flocs form after the first two stages and begin to settle due to gravity.

As a leading manufacturer of high-quality polyaluminum chloride (PAC), Lanyao Water Treatment Co., Ltd. specializes in producing advanced PAC solutions tailored for water treatment needs. With stringent quality control and a focus on sustainable innovation, we provide reliable, cost-effective coagulants that empower industries worldwide to achieve optimal water purification results. Partner with us to enhance your treatment processes with precision-formulated PAC solutions.