While Polyaluminium Chloride (PAC) is a highly effective coagulant, like any chemical treatment, users may occasionally encounter challenges. Understanding these common issues and their solutions is key to maintaining efficient water treatment operations. As a dedicated Polyaluminium Chloride manufacturer and supplier in China, we offer practical troubleshooting advice to help you achieve the best results from our products.

One frequent issue is inconsistent floc formation or slow settling. This can stem from several factors. Firstly, incorrect PAC dosage is a common culprit. If the dosage is too low, insufficient flocs will form; if it's too high, the water can become oversaturated, leading to smaller, less settleable flocs or even restabilization. Always refer back to your jar test results and adjust based on real-time water conditions. Secondly, improper mixing can hinder flocculation. Ensure adequate rapid mixing immediately after PAC addition to disperse the chemical, followed by controlled slow mixing to encourage floc growth. Water temperature also plays a role; colder water may require slightly higher dosages or longer mixing times. If you are purchasing PAC and encountering this, consult our technical team for specific guidance.

Another problem can be residual turbidity after filtration, even with apparent floc formation. This might indicate that the flocs formed are too small or too weak to be effectively captured by the filter media. This could be due to insufficient aging time for floc growth, inadequate filtration design, or even the presence of very fine colloidal particles that PAC struggles to aggregate on its own. In such cases, considering the use of a coagulant aid, such as a polymer, can significantly improve floc strength and settling. We supply a range of related water treatment chemicals and can advise on synergistic applications.

Unexpected pH fluctuations can also impact PAC performance. While PAC is known for its broad pH tolerance, extreme variations in raw water pH can still affect its efficiency. If your water source is consistently outside the optimal pH range for PAC (typically 5-9), minor pH adjustments using acidic or alkaline chemicals might be necessary. However, remember that PAC itself has an acidic nature, and its use can lower the water's pH. Monitoring and controlling the pH throughout the treatment process is crucial. Our technical support can help you understand how our specific PAC grades interact with your water chemistry.

Finally, ensuring the quality of the PAC itself is paramount. Using outdated or improperly stored Polyaluminium Chloride can lead to reduced efficacy. Always check the product’s shelf life and storage conditions. As a reliable PAC manufacturer, we emphasize proper handling and storage to maintain product integrity. If you are experiencing persistent issues, don't hesitate to reach out to us. We provide high-quality PAC and expert support to help you overcome any water treatment challenges and ensure optimal performance.