Impeller meters in chemical injections for water treatment

Problem:
Continous monitoring of water quality is often impractical and prohibitively expensive. Treatment frequently consists ofthe injection of chemicals at a regulated rate. The most common method of treatment is to inject hypochlorite at fixedinterval times. This works reasonably well in closed loop systems or open loop systems where flow rates are held consistent. When flow rates are erratic, it can become inefficient and less cost effective. At times of low flow, a fixed injection rate can result in overtreatment. This results in wasted hypochlorite (or any other used chemicals). At times of peak flow, an insufficient amount of hypochlorite would be injected. This would not effectively treat the water.

Solution:
In open loop systems where the inlet water quality is relatively stable and flow rate is erratic, a method of treatment that injects chemicals proportional to flow rate can be more accurate. This can also be more reliable and cost effective than one based on fixed interval injections.
Model 2100 flow meter coupled with series 200 or series 4000 flow sensors provides accurate monitoring of flowrate, flow total and activation of chemical injection process. Total flow can be monitored and displayed.