Aluminum Polychloride PAC Powder for Wastewater Coagulation

Product Overview

Aluminum Polychloride PAC Powder, also known as Polyaluminum Chloride powder or Poly Aluminium Chloride powder, is an inorganic polymer coagulant widely used for wastewater coagulation.

Wastewater often contains suspended solids, colloidal particles, organic matter, color bodies, fine sludge particles and other impurities. Many of these particles are very small and remain stable in water, which makes them difficult to remove by natural settling.

PAC powder helps break this stability through chemical coagulation. After dosing and mixing, PAC neutralizes the charge of fine particles and colloids. These particles then gather into larger flocs, which can be removed by sedimentation, flotation or filtration.

Bluwat supplies spray dried PAC powder in different grades for municipal wastewater, industrial wastewater and high turbidity water treatment systems.

Why PAC Powder Is Used for Wastewater Coagulation

Wastewater treatment plants need stable solid liquid separation to reduce turbidity, suspended solids and visible impurities. If the coagulation step is weak, the wastewater may remain cloudy and downstream treatment may become less efficient.

Aluminum Polychloride PAC Powder provides fast coagulation and supports strong floc formation. It can be used as the main coagulant before PAM flocculant in many wastewater treatment systems.

PAC is especially useful when wastewater contains fine suspended solids, colloids, unstable particles, color and organic impurities. With proper dosage and mixing, it can improve sedimentation speed, reduce effluent turbidity and support more stable plant operation.

Key Advantages

Recommended PAC Grades for Wastewater

Bluwat provides different PAC powder grades for wastewater coagulation.

For most wastewater coagulation applications, PAC-02 and PAC-031 are commonly selected based on wastewater quality, treatment target and operating cost.

Typical Wastewater Applications

How PAC Works in Wastewater Coagulation

PAC powder is usually dissolved in water before dosing.

After PAC solution is added into wastewater, it quickly disperses under rapid mixing. During this stage, PAC contacts suspended particles and colloids and neutralizes their surface charge.

Once the particles become unstable, they begin to collide and form micro flocs. During slow mixing, these micro flocs grow larger. If PAM flocculant is added, the flocs become stronger and settle faster.

Finally, the flocs are separated from water through sedimentation, flotation or filtration. This process helps produce clearer treated water and more concentrated sludge.

Suggested Dosing Process

A typical wastewater coagulation process includes the following steps.

• 1
  First, prepare PAC powder into a solution with clean water.
• 2
  Second, dose PAC solution into wastewater under rapid mixing.
• 3
  Third, allow PAC to fully contact suspended solids and colloids.
• 4
  Fourth, adjust pH if necessary according to jar test results.
• 5
  Fifth, add PAM flocculant under slow mixing if larger flocs and faster sedimentation are required.
• 6
  Finally, separate the flocs by sedimentation, DAF or filtration.

The actual dosage should be confirmed by jar testing. Different wastewater sources may require different PAC dosage, PAM type, pH condition and mixing time.

PAC and PAM Combination

PAC and PAM are widely used together in wastewater treatment.

PAC is the coagulant. It destabilizes fine particles and forms micro flocs.

PAM is the flocculant. It bridges micro flocs into larger flocs and improves settling speed.

The usual dosing sequence is PAC first and PAM second. This sequence is important because PAC prepares the particles for flocculation, while PAM strengthens the final floc structure.

For wastewater with high color or stable dissolved pollutants, a water decoloring agent may be added before PAC based on the wastewater condition.

Packaging and Storage

Bluwat Aluminum Polychloride PAC Powder is packed in 25 kg bags with inner plastic bag and outer woven bag.

Storage recommendations:

• Store in a cool, dry and well ventilated warehouse.
• Keep away from moisture and direct sunlight.
• Keep the bags sealed before use.
• Avoid exposure to high temperature and incompatible materials.
• Use the product promptly after opening.

Proper storage helps maintain product solubility and coagulation performance.

Why Choose Bluwat Chemicals

Bluwat Chemicals is a professional manufacturer and exporter of water treatment chemicals. We supply PAC powder, PAM flocculant, water decoloring agent, PolyDADMAC, Polyamine and other wastewater treatment chemicals.

Bluwat PAC powder is produced under stable quality control and supplied in different grades for drinking water, municipal wastewater and industrial wastewater applications.

With factory direct supply, technical support and export experience, Bluwat can help customers select suitable PAC grades based on actual wastewater samples and treatment targets.

Conclusion

Aluminum Polychloride PAC Powder is an effective coagulant for wastewater coagulation. It helps remove turbidity, suspended solids, colloids and fine particles through chemical coagulation and floc formation.

For municipal sewage, industrial wastewater, textile wastewater, paper mill wastewater, mining wastewater and coal washing wastewater, PAC powder can support clearer effluent and more stable solid liquid separation.

Bluwat supplies PAC-02 and PAC-031 yellow powder grades for wastewater treatment, as well as PAC-01 white powder for higher purity water treatment requirements.