Patent ID: 8852439

Claim:
A method for filtering liquid, the method comprises providing a filtration device with a liquid inlet and a liquid outlet and a conduit sealingly connected to the liquid outlet for transport of liquid to the liquid outlet; the conduit containing a bundle of hollow fibres; wherein a support member is sealingly connected to the conduit, thereby defining a compartment between the support member and the liquid outlet; wherein each hollow fibre has a microporous membrane surrounding an inner chamber for filtering microparticles from the liquid when the liquid flows through the membranes; each of the fibres either having one open end supported in the support member and one closed end in a strand extending away from the support member, or each of the fibres having both ends supported in the support member and having a looped part extending away from the support member; wherein the device contains only a single bundle of hollow fibres; the method comprising providing a flow of the liquid through the liquid inlet and through the open ends of the fibres into the inner chambers of the fibres, from the inner chambers through the membranes into the compartment and from the compartment out of the conduit through the liquid outlet, wherein the closed ends or the looped parts extend from the support member into the compartment towards the liquid outlet, wherein the method comprises orienting the filtration device with the liquid inlet downwards, providing the liquid outlet with a mouthpiece and providing a suction force at the mouthpiece with a mouth of a drinker for sucking liquid through the filtration device, and orienting the filtration device with the mouthpiece upwards and the support member downwards relatively to the mouthpiece such that the fibres extend upwards from the support member, wherein the liquid is water and the microparticles comprise microbes said process reduces air trapping in the filtration device and increases membrane water flow.