Disinfection of swimming pool water is usually done by:
AChlorine
BAlum
CUltraviolet rays
DOzone
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Related Questions:
High bacterial removal by slows and filter is accomplished by:
Sewer pipes are made of:
Which of the following has minimum detention period
Which of these provide the working space for maintenance and inspection of sewer?
The process of passing the water through beds of fine granular materials like sand is known as: