Zena sro, is a developer and producer of hollow fiber polymer membranes and modules. zena-membranes.cz systems are highly modular and well suited for custom solutions. Applications ranges from water filtration, industrial and communal waste water processing, degassing, contactor applications, medical and bio. In sizes suitable for mid communal MBR, small lab units, luer lock syringe modules to pieces of membrane for bio sensors. Plastic heat exchangers and Photocatalytic Degradation Units.