In chemical feed back systems, how is the necessary chemical added?

In chemical feed back systems, the necessary chemical is added upstream of the point of sensing to ensure that the treatment process can effectively respond to changes in water quality or chemical levels. By adding the chemicals at this location, operators can anticipate and correct any imbalances before the water reaches the sensing point, which allows for timely adjustments to maintain the desired treatment parameters.

This approach is crucial for managing the chemical addition process efficiently, as it allows for a proactive rather than reactive response. It ensures that the treatment system continuously operates within optimal ranges, reducing the risk of excessive chemical use and enhancing overall efficiency.

In contrast, adding the chemical directly at the point of use would not provide sufficient time for the chemical to disperse and react before the water is sampled for sensing, leading to less effective treatment. Adding it downstream of the treatment area would mean that any necessary changes would only be addressed after the water has already been processed, which is not ideal for maintaining consistent water quality. Adding chemicals at the storage facility lacks immediacy and the ability to respond promptly to fluctuations detected at the treatment facilities.