Lab Scale Membrane Distillation Unit Description: Membrane distillation (MD) is a desalination technique that uses a membrane to separate water from saline solutions. It is a thermally driven separation process, meaning that it uses heat to create a vapor pressure difference across the membrane. This vapor pressure difference is what drives the transport of water vapor through the membrane. Overall, membrane distillation is a promising desalination technology that is becoming increasingly competitive with RO. As the technology continues to develop, MD is expected to play a more significant role in providing clean water for a growing population