ഒക്ട് . 04, 2024 14:05 Back to list

function of poly aluminium chloride in water treatment

The Function of Poly Aluminium Chloride in Water Treatment

Poly Aluminium Chloride (PAC) is a widely used coagulant in water treatment processes, playing a vital role in the purification of drinking water and the treatment of wastewater. Composed of various aluminium hydroxides and chlorides, PAC is favored over traditional coagulants like alum for its superior performance and enhanced efficiency in coagulation and flocculation.

One of the primary functions of PAC in water treatment is the removal of suspended solids and impurities. When PAC is added to water, it dissociates into polyions that neutralize the charges on suspended particles, allowing them to clump together, or flocculate. This aggregation of particles forms larger, more manageable flocs that can easily settle out of the water. The effectiveness of PAC in creating these flocs is influenced by several factors, including the pH of the water, the dosage of PAC, and the characteristics of the contaminants.

Another significant advantage of PAC is its ability to work effectively across a wide range of pH levels, making it versatile for different water sources. Traditional coagulants like alum require specific pH conditions to achieve optimal performance, whereas PAC can function well in both acidic and alkaline environments. This flexibility makes PAC particularly valuable in treatment processes that deal with varying water qualities.

function of poly aluminium chloride in water treatment

Moreover, PAC is known for producing clearer supernatants compared to alum, meaning that the treated water exhibits lower turbidity levels. This is an essential factor in drinking water treatment, as it ensures that harmful pathogens and particles are effectively removed. The smaller molecular weight of PAC also allows it to work efficiently at lower dosages, reducing chemical costs and minimizing the formation of sludge, which is a common issue in water treatment facilities.

In addition to its coagulation abilities, PAC can also assist in the removal of color and organic compounds from water, further enhancing water quality. Its adsorption properties enable it to bind with organic matter, making it easier to remove these contaminants during the treatment process.

In conclusion, Poly Aluminium Chloride is an invaluable component in modern water treatment systems. Its ability to efficiently coagulate and flocculate suspended solids, coupled with its effectiveness across a wide pH range, makes it a superior choice over traditional coagulants. As water quality standards continue to tighten globally, the role of PAC in ensuring safe and clean water for consumption and ecological health becomes increasingly significant.

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