Poly Aluminium Chloride PAC Powder for Sewage Treatment Plants
Product Overview
Poly Aluminium Chloride PAC Powder is an inorganic polymer coagulant widely used in sewage treatment plants. It is also known as Polyaluminum Chloride powder, PAC powder or PAC coagulant.
Sewage treatment plants often deal with complex wastewater containing suspended solids, colloidal particles, organic matter, phosphorus, fine sludge particles and mixed industrial discharge. These impurities can affect clarification, biological treatment stability and final effluent quality.
PAC powder helps improve the coagulation process by destabilizing fine particles and colloids in sewage. After dosing and mixing, these small particles form larger flocs that can be removed by sedimentation, flotation or filtration.
Bluwat PAC powder is produced by spray drying technology and supplied in stable powder form. It is suitable for municipal sewage treatment plants, industrial wastewater pretreatment, mixed wastewater treatment and tertiary effluent polishing.
Why Sewage Treatment Plants Use PAC Powder
Sewage treatment plants need stable solid liquid separation to maintain effluent clarity and meet discharge requirements. However, wastewater quality may fluctuate due to rainfall, industrial discharge, seasonal temperature changes and changes in influent load.
When fine suspended solids and colloids do not settle well, the treated water may remain cloudy. PAC powder can help improve coagulation and floc formation, making particles easier to settle or separate.
PAC can be used in different stages of sewage treatment, including primary clarification, secondary clarifier support, tertiary treatment, phosphorus removal support and emergency treatment during water quality fluctuation.
Key Advantages
PAC powder neutralizes particle charge and helps destabilize suspended solids and colloids in sewage.
After proper mixing, PAC helps form visible and compact flocs that are easier to settle.
PAC can reduce turbidity in sewage treatment systems by removing fine particles and suspended solids.
PAC supports TSS reduction and improves solid liquid separation in clarifiers, sedimentation tanks and DAF systems.
PAC can support chemical phosphorus removal in municipal sewage treatment plants when phosphorus control is required.
PAC is commonly used before PAM flocculant. PAC starts coagulation, while PAM enlarges flocs and improves settling speed.
Spray dried PAC powder is easy to transport, store and prepare as a dosing solution for plant operation.
With proper dosage optimization, PAC powder can help improve treatment efficiency and support stable sewage plant operation.
Recommended Grades for Sewage Treatment
Bluwat provides different PAC powder grades for sewage treatment plants and wastewater treatment applications.
For most sewage treatment plants, PAC-02 and PAC-031 are commonly used depending on influent quality, treatment target and operating cost.
Application in Sewage Treatment Plants
PAC can be dosed before primary sedimentation to improve suspended solids removal and reduce the load on downstream biological treatment.
When sludge settling performance is unstable or effluent turbidity increases, PAC can help improve floc structure and clarification.
PAC is widely used in tertiary treatment for effluent polishing, turbidity reduction and phosphorus removal support before discharge or reuse.
In dissolved air flotation systems, PAC helps destabilize particles and supports better flotation separation when combined with suitable flocculant.
PAC can help improve sludge aggregation and separation in some sludge treatment processes when used with PAM.
For sewage plants receiving industrial wastewater, PAC can help reduce colloids, suspended solids and turbidity before or during main treatment.
During sudden influent changes or high turbidity events, PAC can be used to support temporary chemical clarification.
Suggested Dosing Process
A typical PAC dosing process in sewage treatment plants includes the following steps.
First, prepare PAC powder into a solution using clean water.
Second, dose PAC solution into the wastewater under rapid mixing.
Third, allow PAC to fully contact suspended solids and colloids.
Fourth, adjust pH if necessary based on jar test results and plant operation conditions.
Fifth, add PAM flocculant under slow mixing when larger flocs and faster sedimentation are required.
Finally, separate the flocs by sedimentation, flotation or filtration.
The actual dosage should be confirmed by jar testing. Dosage may vary according to influent turbidity, pH value, alkalinity, phosphorus concentration, suspended solids and treatment target.
PAC and PAM Combination
PAC and PAM are often used together in sewage treatment plants.
PAC works as the coagulant. It destabilizes fine particles and forms micro flocs.
PAM works as the flocculant. It bridges micro flocs into larger flocs and improves sedimentation speed.
The recommended sequence is PAC first and PAM second. This sequence is commonly used in municipal wastewater treatment, industrial wastewater treatment, DAF systems and sludge separation processes.
Using PAC and PAM correctly can help improve floc size, settling speed and final water clarity.
Packaging and Storage
Bluwat 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 product sealed before use.
- Avoid contact with incompatible materials.
- Use the product promptly after opening.
Proper storage helps maintain powder solubility and stable coagulation performance.
Why Choose Bluwat PAC Powder
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 chemicals for municipal and industrial wastewater treatment.
Bluwat PAC powder is produced under stable quality control and supplied in different grades for different water treatment applications.
For sewage treatment plants, Bluwat can support customers with PAC grade selection, jar test guidance, dosing sequence suggestions and export supply service.
Conclusion
Poly Aluminium Chloride PAC Powder is an effective coagulant for sewage treatment plants. It helps improve coagulation, floc formation, suspended solids removal, turbidity reduction and effluent clarification.
For municipal sewage treatment, industrial sewage pretreatment, tertiary treatment and emergency wastewater clarification, PAC powder offers stable and flexible performance.
Bluwat supplies PAC-02 and PAC-031 yellow powder grades for sewage and industrial wastewater treatment, as well as PAC-01 white powder for higher purity water treatment needs.