Degree of purification

Degree of purification

Another important factor in re-use systems is the degree of cleaning CP of the water treatment system. This factor indicates how effectively the cleaning plant in the re-use circuit removes unwanted substances. It can be described as follows (Fig. 10.3):

CP=(Cin− Cout)/Cin×100

where:

CP    = degree of purification

Cin=concentration of actual substance entering the cleaning unit

Cout=concentration of actual substance leaving the cleaning unit.

Example

The concentration of suspended solids entering the particle filter is 25 mg/l; after the filter the concentration is measured as 10 mg/l. Find the effectiveness of the filter.

CP=(Cin− Cout)/Cin×100

=(25 mg/l – 10 mg/l)/25 mg/l × 100

=60%