Q. What is salt rejection?

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Q. What is the concentration factor?

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Q. How is the salt flux expressed mathematically?

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Q. What is the average pressure at which the reverse osmosis operates for sea water desalination?

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Q. What is the average pressure at which the reverse osmosis operates for treating brackish water?

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Q. Calculate the feed flow for a two stage pass for the following data.

Recovery: 85℅
Permeate flow: 100 m³/hr

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Q. The ________ the salt rejection, the better the system is performing.

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Q. What is the osmotic pressure for sea water?

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Q. Membrane permeation rate increases proportionally to effective pressure.

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Q. RO membranes are made of _______

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Q. Concentrated seawater which is called _________

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Q. The osmotic pressure of the brine increases proportionally to the salt concentration.

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Q. The upper limit of brine concentration is ______ times the normal sea water.

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Q. The water flux of RO membranes ______ as water viscosity lowers.

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Q. What is the maximum acceptable limit of temperature for RO?

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Q. What is the design temperature of RO systems?

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Q. What is the operating pH for RO systems?

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Q. Calculate the number of membranes required for the following data:

Flow: 535 m³/h
Area: 400 m²
Flux considered: 12 lmh

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Q. Calculate the recovery for the following data:

Product Flow: 535 m³/h
Feed flow : 635 m³/h
Flux considered: 12 lmh

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Q. What is the thumb rule to consider for osmotic pressure?

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