Application of Cationic Polymers in Municipal Sludge Dewatering - Thailand

A municipal wastewater treatment plant in Bangkok, Thailand, had been facing challenges in sludge dewatering. The plant's existing flocculants resulted in poor cake dryness and unstable dewatering performance, especially when the influent water quality fluctuated during the rainy season. This not only increased operating costs, but also brought difficulties to sludge treatment and disposal.

Solution:

Hengfeng Chemical provided cationic polyacrylamide, which has a high charge density and optimized molecular weight, tailored to the characteristics of Thai municipal sludge. Our technical support team conducted a comprehensive on-site evaluation, including beaker tests and pilot tests, to optimize dosing parameters and ensure seamless integration with the plant's existing filter press system.

Results:

Sludge dewatering efficiency increased by more than 35%

Significantly improved sludge cake dryness, reducing transportation and landfill costs

Reduce chemical consumption and improve cost-effectiveness

Maintain stable performance under different wastewater qualities

Make dewatering equipment run more smoothly, reduce blockage and maintenance requirements

The customer is very satisfied with the efficiency improvement and cost savings, and has adopted Hengfeng's cationic polyacrylamide as its long-term sludge treatment solution. This case shows that Hengfeng Chemical can provide targeted solutions for complex municipal challenges in Southeast Asia and other regions.