Membrane filter

A membrane filter configured to filter a liquid, the membrane filter comprising:

• a base element including at least one membrane carrier that is externally flowable by the liquid and a gas;
• hollow fiber membranes respectively including lumen and attached at a top of the at least one membrane carrier wherein a liquid permeate is filterable from the liquid into the lumen;
• a one piece extruded circumferentially closed pipe that envelops the hollow fiber membranes;
• a gas inlet configured to let gas into a bottom of the membrane filter;
• at least one permeate collection cavity included in the base element and connected with the lumen and configured to collect the liquid permeate from the hollow fiber membranes;
• a permeate outlet included in the base element and configured to drain the liquid permeate from the at least one permeate collection cavity laterally from the base element,
• wherein a bottom edge of the pipe is arranged below the permeate outlet and the permeate outlet runs laterally through an opening in a wall of the pipe,
• wherein an annular gap between the at least one membrane carrier and the pipe is configured as an open flow cross section for a flow of the liquid and the gas, and
• wherein the base element and the pipe are connected with each other.