Abstract vacuum membrane distillation is a membrane based separation process considered here to remove volatile organic compounds from aqueous streams.
Vacuum membrane distillation equipment.
Different configurations for example gas gap membrane distillation or vacuum membrane distillation will be considered in the next sections.
Ii vacuumisappliedinthepermeatesideofthe membrane module by means of a vacuum pump theappliedvacuumpressureislower than the saturation pressure of volatile molecules to be separated from the feed solution.
Hollow fiber vmd systems however have not yet been optimized for energy recovery.
The driving force of the process is a partial vapour pressure difference commonly triggered by a temperature difference.
Vmd is an evaporative process that physically.
Exergy analysis of a vacuum membrane distillation system integrated with mechanical vapor recompression for sulfuric acid waste treatment 1.
The tank may include one or more membrane pouches that are submerged in the circulating brine or placed above the water level of.
Flat sheet vmd systems recover the brine energy by employing a cascade system to improve the shc.
Modelling of pore wetting in membrane distillation compared with pervaporation.
Membrane distillation md is widely employed in separation processes such as.
Vacuum membrane distillation vmd.
1 2 future development membrane distillation is an alternative to the traditional evaporative distillation systems used for desalination or water purification processes.
Although vacuum membrane distillation vmd has a high distillate flux its potential is limited by its high specific heat consumption shc.
In one example brine is circulated in a tank.
In this method the driving force is the vacuum applied at the permeate side of the membrane by a vacuum pump.
Sulfuric acid waste is one of the common industrial waste waters all over the world the direct.
Integrated systems involving.
Desalination concentration in food industries acid manufacturing removing organic and heavy metals treating radioactive waste.
Membrane distillation md is a thermally driven separation process in which separation is driven by phase change a hydrophobic membrane presents a barrier for the liquid phase allowing the vapour phase e g.
This md con uration is termed vacuum membrane distillation vmd.
Fundamentals membrane materials and key operations.
Vacuum membrane distillation membrane contactors.
In this case condensation takes place outside of the membrane module.
Microporous hydrophobic membranes are used to separate the aqueous stream from a gas phase kept under vacuum.
Embodiments provide methods and structures for purification or volume reduction of a brine by an advanced vacuum distillation process avmd to achieve higher flux by passage of vapors through an avmd distillation unit.
