“Mass transfer is the net movement of mass from one location, usually meaning a stream, phase, fraction or component, to another. Mass transfer occurs in many processes, such as absorption, evaporation, adsorption, drying, precipitation, membrane filtration, and distillation. Mass transfer is used by different scientific disciplines for different processes and mechanisms. The phrase is commonly used in engineering for physical processes that involve diffusive and convective transport of chemical species within physical systems.
Some common examples of mass transfer processes are the evaporation of water from a pond to the atmosphere, the purification of blood in the kidneys and liver, and the distillation of alcohol. In industrial processes, mass transfer operations include separation of chemical components in distillation columns, absorbers such as scrubbers, adsorbers such as activated carbon beds, and liquid-liquid extraction.”
cited from: Mass transfer. (2014, September 11). In Wikipedia, The Free Encyclopedia. Retrieved 15:38, September 11, 2014, from http://en.wikipedia.org/w/index.php?title=Mass_transfer&oldid=625081350
EnviCare® Engineering GmbH is working on the development of mass-transfer processes that are based on membrane technology.
Membrane technology recovers both energy and substance
For example, the direct recovery of nitrogen and phosphorus fertilizer from biogas slurry or the highly loaded effluent of digesters. So far membrane technology is often used in the environmental equipment for waste water treatment and thus for the separation of clean water from contaminated wastewater. The driving force here always is the energy-intensive applied pressure, while we strive to use diffusion as a driving force and thus reduce the energy needs substantially and at the same time to enrich recyclables.