What is a common application of ferrous chloride in wastewater treatment facilities?

Ferrous chloride is commonly used as a coagulant in wastewater treatment facilities due to its effectiveness in aggregating suspended particles, which helps in the clarification process. When added to wastewater, ferrous chloride reacts with the impurities and particles present in the water, promoting their aggregation into larger floc particles. This process enhances sedimentation, making it easier to remove solids from the water during subsequent treatment stages.

The use of ferrous chloride in coagulation is particularly advantageous because it can aid in the removal of phosphorus and other harmful substances, thereby improving water quality prior to discharge or further treatment. Its role as a coagulant is a critical part of ensuring the efficiency of the wastewater treatment process, contributing to the overall reduction of pollutants and the protection of environmental water sources.

While ferrous chloride could have some ancillary effects related to odor or sludge volume reduction, its primary and established use within the context of wastewater treatment is indeed as a coagulant.