Читать книгу Automation of Water Resource Recovery Facilities - Water Environment Federation - Страница 246

The following are typical process variables needed for control:

• Sludge blanket level within the clarifier,

• Sludge removal time,

• Scum accumulation on surface,

• Scum rake or flight position,

• Scum pit level, and

• Scum pit water/scum interface.