Correct option is B
Rapid sand filters are an essential component in water treatment plants. They are used to remove suspended solids from water by passing it through a bed of sand and other granular materials. The rate of filtration is a key parameter in the design and operation of these filters.
Standard Rate of Filtration:
The standard rate of filtration for a rapid sand filter typically ranges between 80-100 liters per minute per square meter (lpm/m²). This rate is chosen to ensure that the filter operates efficiently without causing excessive pressure drop or rapid clogging of the filter media.
