MembranLuftkontaktor

The Membranluftkontaktor, also known as a membrane air contactor, is a device used in water treatment and industrial processes to transfer gases between two immiscible phases, typically air and water. It operates on the principle of gas-liquid mass transfer, where contaminants such as carbon dioxide (CO₂), hydrogen sulfide (H₂S), or volatile organic compounds (VOCs) are removed from water by transferring them into an air stream.

The core component of a Membranluftkontaktor is a membrane module, which consists of a bundle of hollow fibers or porous membranes. Water flows through the fibers or channels on one side of the membrane, while air is introduced on the other side. The membrane acts as a barrier, allowing only gas molecules to diffuse across it, while retaining water and dissolved solids. This selective permeability ensures efficient gas transfer without mixing the two phases.

Membranluftkontaktoren are particularly effective for applications requiring precise control over gas removal, such as decarbonation in drinking water treatment, odor control in wastewater, or the removal of hydrogen sulfide from industrial effluents. They are also favored in systems where energy efficiency is critical, as they operate at low pressure drops and can be integrated into existing infrastructure.

Compared to traditional gas stripping methods, such as packed towers or spray aerators, Membranluftkontaktoren offer several advantages, including higher mass transfer efficiency, compact design, and reduced chemical consumption. However, their performance depends on factors such as membrane material, flow rates, and the specific contaminants present in the water. Regular maintenance, including membrane cleaning or replacement, is essential to sustain optimal operation.