Feijoa juice is being concentrated using an ultrafiltration membrane to remove excess water. The dilute feed...

Feijoa juice is being concentrated using an ultrafiltration membrane to remove excess water. The dilute feed flows in at 600 m/hr with 5 % solids (wt/wt) and density 1015 kg/m3. The desired concentration of the juice is 16 % total solids. A tubular membrane system is chosen, with membrane tubes of 3 cm internal diameter. The system operates with a pressure differential of 3000 kPa applied across the membrane.
a) What is the main advantage of using membrane separation to concentrate feijoa juice instead of evaporation?
b) Determine the mass flow rates of the feed, permeate and retentate streams in kg/s.
c) If the permeability constant of the membrane is 5 × 10-5 kg/[m2 kPa s], what is the total length of membrane tube required?
d) Explain how concentration polarisation will affect transmembrane flux in this process. You may include relevant equations in your explanation.

Solutions

Expert Solution

Amanda K answered 3 months ago

Next > < Previous

Related Solutions

An asymmetric ultrafiltration membrane is used with the aim of separating dyes from a liquid stream and to achieve a more concentrated dye-water mixture.

An asymmetric ultrafiltration membrane is used with the aim of separating dyes from a liquid stream and to achieve a more concentrated dye-water mixture. The feed waste stream arrives at a flow rate of 2.2m3.hour-1 with concentration of 1.2 kg.m-3. The membrane’s operating characteristic was calculated from various experiments: where the bulk concentration C has units of kg.m-3 and flux is measured in m3.hour-1.m-2. If two membrane modules, each of area 25 m2, are simply placed in series, give reasonable...

An asymmetric ultrafiltration membrane is used with the aim of separating dyes from a liquid stream and to achieve a more concentrated dye-water mixture.

An asymmetric ultrafiltration membrane is used with the aim of separating dyes from a liquid stream and to achieve a more concentrated dye-water mixture. The feed waste stream arrives at a flow rate of 3.0m3.hour-1 with concentration of 0.5 kg.m-3. The aim is to achieve a dye-water concentration leaving the membrane of 20 kg.m-3, so that it can be reused to dye fabric. The membrane’s operating characteristic was calculated from various experiments: where the bulk concentration C has units of ...

If excess water passes out from the tissue without being restored by the kidneys, the cells...

If excess water passes out from the tissue without being restored by the kidneys, the cells would (a) burst open and die (b) take water from the plasma (c) not be affected at all (d) shrivel and die.

Consider a regenerative Rankine cycle with one steam extraction point using an open feed-water heater (OFWH)....

Consider a regenerative Rankine cycle with one steam extraction point using an open feed-water heater (OFWH). P at boiler = 5 MPa T at turbine inlet = 600 0C P at OFWH = 1 MPa P at condenser = 10 kPa All device efficiencies = 1 Solve the problem analytically step by step; find all work interactions, heat transfers, and the thermal efficiency.

Water at 50 °F is being transported from one open reservoir to another open reservoir using...

Water at 50 °F is being transported from one open reservoir to another open reservoir using a concrete pipe. The two reservoirs are 1.5 miles apart with a difference in surface elevations of 25 ft. Determine the minimum pipe diameter needed to carry 10 ft3 /s of water.

A microfiltration membrane operating with pure feed of water produces a flux of 0.06 k g ⋅ s − 1 ⋅ m − 2 0.06 kg⋅s−1⋅m−2 when operated with a TMP of 30 k P a 30kPa.

A microfiltration membrane operating with pure feed of water produces a flux of 0.06 kg⋅s−1⋅m−20.06 kg⋅s−1⋅m−2 when operated with a TMP of 30kPa30kPa. 1. What is the resistance due to the membrane? Specify the units. 2. If operated with a protein-water mixture at a 20kPa20kPa pressure difference, a flux of 216×216× 10−6 kg⋅s−1⋅m−210−6 kg⋅s−1⋅m−2 is measured at steady state. What is the resistance due to cake build-up? Specify the units.

Subjects