Can polyaluminum chloride(PAC) be used in water treatment?
Yes, Polyaluminum Chloride (PAC) is widely used in water treatment applications due to its high efficiency and broad range of functionality. It serves as a coagulant and flocculant agent, which helps in the removal of impurities from water.
In water treatment processes, PAC works by destabilizing colloidal particles and finely divided suspended solids present in water, making them aggregate into larger flocs. This aggregation facilitates the sedimentation or filtration process, effectively removing contaminants such as turbidity, organic matter, heavy metals, and even some microorganisms.
Some key advantages of using PAC in water treatment include:
- Enhanced clarification capabilities leading to clearer treated water.
- Better adaptability to a wide range of pH levels compared to other metal-based coagulants.
- Reduced sludge production compared to traditional alum treatments.
- Improved effectiveness against natural organic matter and color removal.
It is commonly applied in drinking water purification plants, wastewater treatment facilities, and also in industrial effluent treatment systems. Additionally, PAC can be used in pre-treatment stages before advanced treatment technologies like reverse osmosis or ultrafiltration to protect these expensive membranes from fouling.
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