Estimate the osmotic pressure, Chemistry

Assignment Help:

A reverse osmosis membrane is used to desalinate high salinity groundwater. It is proposed to build an RO plant that will process about 500,000 liters/day of saline feed water containing sodium chloride at a concentration of about 5,000 mg/L having osmotic pressure of 3.57 atm. The permeability of the membrane selected for desalting the above water source is 3.2x10-8 m3 water/(m2 •s•atm)..

1. If 50% of the feed is recovered as desalted water at observed salt rejection of ~99%.

a. What is the required minimum feed pressure assuming that the entire membrane surface is to produce water permeate.

b. Estimate the expected salt concentration of the concentrate stream?

c. Estimate the osmotic pressure of the exit concentrate stream?

d. What is the required membrane surface area?

 2. If the concentration of the salt at the membrane surface, just at the exit end of the membrane channel, is a factor of 1.2 higher than the bulk concentration (assumed to be equal to the feed concentration), estimate the value of the mass transfer coefficient (in the appropriate units), assuming the same permeate flux as in part 91).


Related Discussions:- Estimate the osmotic pressure

Percent composition, the dug known as LSD has the formula C20H25N3O.one sus...

the dug known as LSD has the formula C20H25N3O.one suspected sample contained 74.7%C,7.95%H,9.99%N.calculate the theoretical percentages to four significant figures

Semiconductor, variation of cnductivigy with temperature

variation of cnductivigy with temperature

Energy of the electron in hydrogen atom is given, Energy of the electron in...

Energy of the electron in Hydrogen atom is given by: (1) E n = 131.38/ n 2 x kj mol -1         (2)  E n = 131.33/n xkj mol -1           (3) E n = 1313.3/ n 2 x kj mol

Electronic configuration having atomic number 106, Elements upto atomic num...

Elements upto atomic number 103 have been synthesized and studied. If a newly discovered element is found to have an atomic number 106, its electronic configuration will be: (1

#title.p block elements., which element has the highest oxidation state and...

which element has the highest oxidation state and why?

Ion exchange property of soils, Ion Exchange Property of Soils Ion exch...

Ion Exchange Property of Soils Ion exchange is a reversible process. Soil has capacity to exchange its ions due to its colloidal property. The water existing in the immediate v

Simple distillation, n-propyl acetate evaporates rapidly when exposed to ai...

n-propyl acetate evaporates rapidly when exposed to air,but water does not.Explain

Structure of Atom, How much time a hydrogen electron will take when it goes...

How much time a hydrogen electron will take when it goes from first orbit to second orbit?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd