Which chemicals are most commonly used to condition sludge at the Attleboro WWTP?

The most commonly used chemicals for conditioning sludge at wastewater treatment facilities, including the Attleboro Wastewater Treatment Plant (WWTP), are lime and ferric chloride. Lime serves multiple purposes, including increasing the pH of the sludge, which helps to stabilize and reduce odors while promoting dewatering. It also aids in pathogen reduction and can improve the quality of the final biosolids product.

Ferric chloride is primarily used as a coagulant. In the sludge conditioning process, it helps to bind with water and facilitate the removal of solids. By flocculating particles together, ferric chloride enhances the settling characteristics of sludge, which is essential for effective separation in further treatment processes.

Overall, the combination of lime and ferric chloride provides an effective treatment approach to optimize sludge conditioning, enhancing both the mechanical dewatering capabilities and the overall management of the sludge produced in the wastewater treatment process.