The effectiveness of Polyaluminum Chloride (PAC) and aluminum sulfate (Alum) in water treatment depends on the specific application, water quality, and treatment objectives.

1. Aluminum Sulfate (Alum) It is a traditional coagulant that has been used for decades in water and wastewater treatment.

2.  Polyaluminum Chloride (PAC)  - PAC is a more modern coagulant with a higher molecular weight and a greater range of active species compared to alum.

In summary, while both chemicals serve as coagulants and have their respective advantages, PAC generally offers more versatility and may be more efficient in treating water with complex contaminants or varying water conditions. However, the choice between the two ultimately depends on the specific requirements of each treatment plant, including process design, raw water characteristics, and desired effluent quality. In many cases, PAC has demonstrated improved performance over alum but could also be more expensive upfront.

Polyaluminum chloride has a better effect than alum. The flocculent alum flowers form quickly, the particles are dense and heavy, and are easy to settle, which can shorten the settling time; The effluent has low turbidity, low chromaticity, good filtration performance, and can shorten the filtration cycle; High alumina content, low dosage, can reduce water treatment costs; Low corrosiveness, beneficial for pipeline protection; Easy to use and reduce labor intensity.

Keywords: PAC, Poly aluminum Chloride, poly aluminium chloride, Polyaluminum Chloride, PACL, Coagulant, Flocculant, Yellow PAC, Yellow polyaluminum chloride, White PAC, White polyaluminum chloride, PolyDADMAC, DADMAC, PDADMAC, Polydmdaac, polyelectrolyte

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