Medad's Multiple-Effect Distillation Adsorption Desalination (“MED-AD”) technology uses multiple beds of powerful adsorbents to achieve a continuous evaporative desalination process. There are no moving parts in the AD beds. Very low-grade heat drives the adsorption process. AD is able to robustly operate at feed inputs with solids levels up to crystallization. AD alone can provide high recovery of RO reject, fracking or other problem waste water.


Our Technologies

When hybridized with MED, AD improves the Gained Output Ratio (“GOR”) of the desalination system up to 50% by leveraging low-grade heat from such sources as boiler exhaust/blowdown or solar thermal. AD also enables MED to operate below cooling water temperatures as AD adsorbs vapor at saturation pressures below 10°C while using 30 - 35°C cooling water.



When hybridized with a crystallizer, AD enables operations at ultra low temperatures to aid cold crystallization at a fifth of the OPEX of competing technologies. Since no external refrigeration is required, electrical consumption can be lowered by more than 70%. This is especially useful for FGD (Flue Gas Desulfurization) waste water streams where low-temperature crystallization is critical.

Ultra Low Temp 
Adsorption Crystallization


Ultra low temp MED driven by Adsorption Technology


Medad's ULT-MED AD readily complements existing and planned Multi-Effect Distillation plants of any scale at a minimal capital expenditure and lowers operating cost. 

Medad's ULTAC can reduce crystallization OPEX for FGD market from 70 kWh/cubic to below 7 kWh/cubic. 

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National University of Singapore

21 Heng Mui Keng Terrace, 

Level 1, The Hangar.

Singapore 119613

Medad Technologies Pte Ltd
(Reg: 201111303W)