The following characteristics pertain to the sand filters used in water industry. Filtration rate is 1 to 4 m3 (m2 day).Typical duration of operation in one run is 24 to 72 hours.Operating cost is low. Which of the above characteristics pertain to slow sand filters

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Priya

Priya

does anyone know the correct answer

Rashmi

Rashmi

how did the answer came

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