• The Linear Flow Orifice Meter riser pipe, LFOM, is located in the entrance tank. It is used in the plant when chemical dose flows are laminar. The LFOM tank creates a linear relationship between the flow rate through the plant and the height of water in the entrance tank so that a float system can be used control the chemical dose.

• The Chemical Doser creates a directly proportional relationship between the plant inflow tank water level and the flow controller outflow tubing level.

• The Flow Controller maintains a constant head level in a small bottle so that hydraulics can be used to dose a specific chemical flow rate solely by controlling the outflow tubing level.

Nonlinear Chemical Dose Controller

• A linear dose controller has been designed to control chemical doses when flow in the dosing tube is laminar based on a linear relationship between headloss in the dosing tube and entrance tank level. This relationship does not hold when flow in the dosing tube is turbulent. Therefore, a chemical doser with a constant chemical dose response to nonlinear changes in plant flow is being designed.