Q. What is the depth of washing during high-rate water backwash?

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Q. What does sand filter remove?

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Q. What is the TSS at the outlet of the Pressure Sand Filter (PSF)?

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Q. While designing a sand filter what is the velocity that is assumed?

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Q. While designing a dual media filter what is the velocity that is assumed?

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Q. While designing a multimedia filter what is the velocity that is assumed?

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Q. Calculate the diameter of a sand filter with the following data.

Flow: 2200 m³/hr
Velocity: 12 m/hr

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Q. Calculate the diameter of a dual media filter with the following data.

Flow: 2200 m³/hr
Velocity: 15 m/hr

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Q. Calculate the diameter of a multimedia filter with the following data.

Flow: 2200 m³/hr
Velocity: 18 m/hr

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Q. While designing a blower for backwash for sand filters without air scouring what is the velocity considered?

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Q. While designing a blower for backwash for sand filters with air scouring what is the velocity considered?

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Q. While designing a blower for backwash for dual media filters without air scouring what is the velocity considered?

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Q. While designing a blower for backwash for multimedia filters without air scouring what is the velocity considered?

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Q. While designing a blower for backwash for multimedia filters with air scouring what is the velocity considered?

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Q. While designing a pump for backwash for a filter what will be the velocity assumed?

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Q. Calculate the flow rate of the backwash pump to be used for a dual media filter with the following data.

Flowrate: 2200 m³/h
Rise velocity of DMF: 15 m/h

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Q. Calculate the flow rate of the backwash pump to be used for a pressure sand filter with the following data.

Flowrate: 2200 m³/h
Rise velocity of PSF (Pressure Sand filter): 10 m/h

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Q. Calculate the flow rate of the backwash pump to be used for a multimedia filter with the following data.

Flowrate: 2200 m³/h
Rise velocity of multimedia filter: 18 m/h

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Q. What is the bulk density of pebbles assumed while designing a Pressure sand filter?

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Q. What is the bulk density of sand assumed while designing the amount required for a sand filter?

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