Question

Design a single stage RO desalination system by calculating the permeate salinity, the brine salinity, the brine flow rate, and the membrane area. Analyze the following cases:

Data

Water permeability is \(2.05 \times 10-6 \mathrm{~m} 3 / \mathrm{m} 2 \mathrm{~s} \mathrm{kPa}\)

Salt permeability is \(2.03 \times 10-5 \mathrm{~m} 3 / \mathrm{m} 2 \mathrm{~s}\)

Feed salinity is 34,000 ppm Feed flow rate: \(2.5 \mathrm{~kg} / \mathrm{s}\) 

Permeate flow rate: \(1 \mathrm{~kg} / \mathrm{s}\) 

Feed pressure: \(6000 \mathrm{kPa}\) 

Reject pressure: \(5800 \mathrm{kPa}\) 

Permeate pressure: \(101 \mathrm{kPa}\)

Answer 1

Given the data Cooder permeability = 2.05x10 ms Selt permeability = 2.03 x16M12 Feed Salforsity = 3400 fps S3491 Feed forte 9, 5 legs Permente florate = fugle Feed pressure (S) 6000 kPa Reflect pressure (S5800 kPa Perweate Precure = litra (9) 1.01 boor Permcat e S = 349) 5, = 6000k pa 120 to Reject lolats Sz = 5800 RPG = 580 Fred for walls below: 6 = Ft Fg = F-F2 = 2.5-2 Sa SAR Here, Rt constant by cesteg Per S., fr. lg vales to freding for, $28: (1.01) x 34 = 3a34 ..$ = 0.57 912 58 34