An apparatus for enrichment and depletion of substances in a liquid

An apparatus for enrichment and depletion of substances in a liquid, comprising - includes a membrane module which concentric cylinders and hollow fibers (33, 34) of semipermeable material for enrichment and depletion of a liquid wherein the liquid is conducted into the fibers of the waste and to be enriched material and outside the fibers, - which has a drive module, a drive unit (9) for driving a conveyor that conveys the liquid element (1), - a delivery module for delivering the fluid through the device, with a conveyor element (1) which is placed in the axial extension of the drive module, the drive module in a liquid-tight closure of the membrane module in this is insertable and removable, characterized, that a spring (14) is arranged in the interior of the drive module, which pushes out at a dissolving a bayonet connection a plug including the holder from the inner cylinder (25), while remaining parts of the drive module initially unchanged by an attractive force of a magnetic coupling in the device ...