Massachusetts Wastewater Practice Exam

In wastewater terminology, drag-out refers to the plating solution that is unintentionally carried over into the rinse tank from the plating operation. This phenomenon occurs during processes such as electroplating, where the solution containing metals and other chemicals is applied to items being treated. When those items are removed, some of the solution clings to their surfaces and drags out into the rinse water. This is significant because it can lead to contamination of the rinse water, which then requires proper treatment before discharge or recycling to ensure compliance with environmental regulations. Understanding drag-out is critical for those managing wastewater treatment systems as it impacts both treatment processes and the overall efficiency of operations.