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 = degree of purification
Cin=concentration of actual substance entering the cleaning unit
Cout=concentration of actual substance leaving the cleaning unit.
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.
=(25 mg/l – 10 mg/l)/25 mg/l × 100
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