Is it necessary to Perform Microbial Limit test for Feed Water during Water Validation system.
Yes. It is necessary to perform during validation a Microbial limit test and the absence of objectionable pathogens in the feed water (Raw water) to understand the initial microbial load and absence of pathogens in it.
Depending upon the microbial load of feed water, it would be helpful to decide the adequate measures to be taken to control the microbial load in final purified water. The measures could be a combination of installment of online Chlorine dosing (at initial stages of purification), Ozone treatment, Membrane filters, UV- Sanitizers, continuous circulatory closed loop system, etc.
Even, during routine monitoring of the purified water system, it is necessary to determine the microbial load in the feed water as the microbiological (and chemical) quality of feed water can change from time to time due to seasonal variations across the year.
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