ZLD- Membrane Distillation

Membrane distillation (MD) is a separation process where a micro-porous hydrophobic membrane separates two queous solutions at different temperatures. The hydrophobicity of the membrane prevents mass transfer of the liquid, whereby a gas-liquid interface is created. It requires feed temperature up to 80 degree C and vacuum as driving force. Membrane distillation is useful for salt concentration or recovery from water stream. It is the best option for the replacement of multiple effect evaporator (MEE).

Benefits :

• Less requirement of heating,
• vacuum
• saves energy with less space requirement

Application :

• Concentration of Juice, alcohol
• Brine Concentration
• Cooling Towers Blow down Treatment
• Removal of volatile components
• Water purification in the pharmaceutical, chemical and textile industries
• Food & Beverages
• Resource concentration

Benefits of CDMS Membrane VS Conventional in case of MEE:

Conventional MEE	CDMS Membrane Plant
Footprint required - huge	Footprint required - small
Steam requirement is huge	No or minimal requirement of steam
Scaling is high	Scaling is less as non-fouling MOC of membrane
Huge operating cost	Very less operating cost