The pathogenic bacteria do not last long at a pH
The filter run in the rapid sand filter should not be less than
What is the dose of lime required in the excess lime treatment?
The depth of water while using ultra violet ray treatment for disinfection should be
when compared to slow sand filter. The bacterial removal efficiency of the rapid sand filter is
The period of cleaning of a slow sand filter is ______ than a rapid sand filter.
Which type of trouble in filter is caused by the release of dissolved air and gases from water.
Which of the following is a chemical method of disinfection?
Which method of disinfection is mainly used in rural areas?
Which of the following is wrong regarding disinfection?