Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • A reverse osmosis plant is designed to produce

A reverse osmosis plant is designed to produce 10 \ \text{m}^3/\text{day} of drinking water from seawater containing 35,000 ppm of dissolved salts. The membrane has a rejection coefficient of 0.98 for salt, and the applied pressure is 20 bar. What is the concentration of dissolved salts in the permeate?

Option: 1

 700 ppm 


Option: 2

1,400 ppm


Option: 3

 2,100 ppm

 


Option: 4

 2,800 ppm


Answers (1)

best_answer

The permeate flow rate can be calculated using the water recovery rate, which is defined as the ratio of the permeate flow rate to the feed flow rate: \text{Water recovery rate }= \frac{\text{Permeate flow rate}}{\text{Feed flow rate}} \times 100%

Given, 

\\\text{feed flow rate} = 10 \ \text{m}^3/\text{day}, \\ \text{salt concentration in feed }= 35,000 \text{ ppm}, \\ \text{rejection coefficient }= 0.98, \\ \text{and applied pressure = 20 bar.}

We can calculate the permeate flow rate as:

\text{Permeate flow rate} = \text{Feed flow rate} \times \text{Water recovery rate}

= 10 \times \frac{1 - \text{Rejection coefficient}}{\text{Applied pressure}}

= 0.1 \ \text{m}^3/\text{h}

Using the rejection coefficient, we can calculate the concentration of salts in the permeate as:

\\\mathrm{C_\text{permeate} = C_\text{feed} \times (1 - \text{Rejection coefficient})}\\\\ \mathrm{C_\text{permeate} = 35,000 \times (1 - 0.98) = 700 \ \text{ppm}}

Posted by

manish

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

17 left in NEET toppers list 2024 as physics question strips 44 of top ranks
anam-khan

NEET Revised Result 2024: Joy and disappointment as all-India ranks change by thousands of places
anam-khan

NEET UG 2024 cut-offs drop for all categories; final scorecard out at neet.ntaonline.in

Latest Question