Chemistry, 21.08.2019 17:10 kk042563

Sea water can be desalinated using a reverse osmosis cell. there are two output streams from the cell i. e. the product (desalinated sea water) and a brine containing an increased amount of sea salt. part of the brine is recycled and mixed with the fresh sea water and the other part is removed as waste. sea water can be considered consisting of water and three weight percent salt. the requirement for the salinity of the product (desalinated water) is 400 parts per million (ppm) salt maximum. the brine waste should not contain more than 5.8% w/w salt. the operating conditions for the reverse osmosis cell include maximum of 4% w/w salt. (a) draw a flow diagram of the desalination process with all material streams and their components. [3 marks] for 1000 l sea water h, calculate the: (1) flow rate of the waste brine. (i) flow rate of the desalinated water. (iii) ratio brine-recycle. [4 marks] [4 marks] [7 marks] assume the density of both the salt water and desalinated water is equal to the density of water i. e. 1 l = 1 kg. (c) what flow rate of sea water is required to produce a total of 30 bottles of 1 l and 48 bottles of 0.33 l of desalinated water per minute?

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Sea water can be desalinated using a reverse osmosis cell. there are two output streams from the cel...

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