Membrane distillation

Membrane distillation (MD) is a perspective method of separation and concentration of inorganic aqueous solutions. The driving force of MD is temperature difference on both sides of a hydrophobic porous membrane, which separates two aqueous solutions with different temperatures and concentrations. T

Membrane Distillation (MD) is a process being investigated the world over as a low cost energy saving alternative to conventional separation processes such as distillation and reverse osmosis. MD has a wide range of benefits such as a 100% (theoretical) rejection of ionic species, macromolecules, co

Membrane distillation may represent an innovative tool to ameliorate treatment of uraemia by allowing the purification of the blood ultrafiltrate and the re-injection of the purified water to the patients. The optimisation of the overall process in terms of energetic requirements, membrane area, and

For the predictive modelling of a membrane distillation process, the gas transport properties, defined by the dusty-gas model, of three highly permeable polyethylene and polypropylene fibre membranes have been determined. Single gas permeation experiments were carried out to determine the Knudsen di

Pure water direct contact membrane distillation experiments were carried out. A model based on a dusty-gas model of gas transport through porous media showed good agreement with the experimental results over the entire range of feed temperatures and recirculation rates studied. The model was also us

Membrane distillation (MD) has been used for water production from brines at temperatures below 50°C. The effect of recirculation rate, mean temperature and salt concentration on the water fluxes has been measured. The experiments have been carried out with a commercial composite membrane formed by

Transmembrane evaporation (often called membrane distillation) carried out in a countercurrent flow module, in which incoming cold seawater is heated by the condensing product water flow, is a promising technology for low-cost seawater desalination. This paper presents a model for preliminary design

• Direct contact membrane distillation (DCMD) was trialled for three months. • Trial pilot plant supplied with waste heat b 40 °C from power station • Water recovery 92.8% reached treating ion exchange regeneration effluent • Trial fluxes between 2 to 5 L/(m2·h), sensitive to heating or cooling temper