Q. Compute the required recycled rate for the flotation thickener with recycle for the following information:

A/S = 0.008 mL/mg
p = 275 atm
Temperature: 20 degree Celsius
Air solubility: 18.7 mL/L
Recycle steam pressure: 275 kPa
Fraction of saturation: 0.5
Surface Loading rate: 8 L/m²/min
Sludge flow rate: 400 m³/d

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Q. Determine the surface area with recycle for the following information.

A/S = 0.008 mL/mg
Temperature: 20 degree Celsius
Air solubility: 18.7 mL/L
Recycle steam pressure: 275 kPa
Fraction of saturation: 0.5
Surface Loading rate: 8 L/m²/min
Sludge flow rate: 400 m³/d

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Q. What is the velocity considered for a flotation thickener to remove oil?

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Q. Lamella clarifier is also called as a inclined plate settler.

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Q. Lamella clarifiers can also be used in mining industries.

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Q. __________ maintain the required water quality to the membrane without the use of chemicals.

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Q. Lamella clarifiers are used as pre-treatment ahead of _____

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Q. What is the length of the tube in lamella clarifiers?

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Q. How much spacing should be provided in between the tubes?

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Q. What is the maximum load of solids that lamella clarifiers can handle?

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Q. What is the retention time for rectangular clarifiers?

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Q. What is the range of overflow rate for circular clarification unit?

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Q. What is the retention time for lamella clarifiers?

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Q. What is the limit of plate load?

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Q. What is the angle of inclination for lamella plates?

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Q. Which of these pollutants does a lamella clarifier remove?

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Q. What is the maximum rise rate in m³/m²/h considered while designing a Lamella clarifier?

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Q. Calculate the flow per plate in a lamella clarifier for the following data?

Flow: 20 m³/h
Area of plate: 1.2 m²
Rise rate: 1.2 m³/m²/h

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Q. How many plates will be required in a lamella clarifier for the following data?

Flow: 40 m³/h
Area of plate: 1.2 m²
Rise rate: 1.2 m³/m²/h

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Q. What is the angle at which the plates should be inclined in a lamella clarifier?

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