Polyaluminum chloride is available in two colors: white and yellow.
Polyaluminum chloride is a highly effective water treatment chemical. As a coagulant, it extracts and aggregates pollutants, colloids, and suspended solids. This leads to the formation of flocs, which can then be removed by filtration.
Polyaluminum chloride products used in water treatment are typically characterized by their basicity (%). Basicity refers to the ratio of hydroxyl ion concentration to aluminum ion concentration. Higher basicity means lower aluminum content, resulting in better removal of pollutants. Lower aluminum content is also beneficial to the process flow, as aluminum residue is significantly reduced.
Differences between Polyaluminum Chloride and Aluminum Sulfate Coagulants
Aluminum sulfate has been a widely used coagulant in the water treatment industry for many years. It is used as a flocculant to remove pollutants, unwanted color, and general turbidity (haze) from water.
However, this process leaves a significant amount of aluminum residue in the water supply, requiring further filtration and generating a large amount of sludge-like waste (called water treatment residue), which is ultimately disposed of in landfills. These disposal costs directly impact the operating costs of water treatment plants, making it necessary to find alternatives that can reduce these costs.
While the waste treatment residue does possess many physical and chemical properties that could allow it to be used for more sustainable purposes, including as building materials or even soil nutrients, concerns about the toxicity of aluminum in soil and its detrimental effects on ecosystems have been well documented, limiting this approach.
On the other hand, polyaluminum chloride (PAC) has been developed as an alternative. PAC is more easily hydrolyzed, provides better coagulation, and has a faster flocculation rate, making it a more efficient product. Furthermore, it uses less aluminum, resulting in significantly reduced aluminum residue and sludge waste.
**Available Colors of Polyaluminum Chloride**
1. White Polyaluminum Chloride (PAC)
This is a newly developed water purification material specifically designed for food, drinking water, municipal water supply, precision manufacturing water purification, paper industry, pharmaceuticals, sugar refining, cosmetic additives, daily chemical industry, and many other fields. It has a very wide range of applications, is of very high purity, and is the most expensive. 3. Yellow Polyaluminum Chloride (PAC)
This is currently the most widely used polyaluminum chloride on the market. It is a highly effective flocculant suitable for wastewater treatment, offering excellent flocculation results. Therefore, it is the best choice for industrial water supply, industrial wastewater treatment, industrial water recycling, and municipal sewage treatment.