Читать книгу Automation of Water Resource Recovery Facilities - Water Environment Federation - Страница 224

The main purpose of a flow pumping system is to control flow from the source to its destination. In these pumping systems, source water is independently controlled and is not dependent on the pumping system for its control. Flow pumping systems include return sludge pumping from clarifiers, mixed liquor internal recycle flows within activated sludge reactors, and polymer and other chemical additive flows.

The main purpose of flow pumping is to control the amount of material discharged from the pumps. Therefore, downstream flow, or pressure, is typically the process variable used to control these systems