Bothmann+Vogler Solutions provide a unique membrane based filtration process in the range of micro- and ultrafiltration. It can be used for treating drinking water, secondary treated wastewater as well as wastewater. Membrane filtration systems can be classified depending on material of filter membranes (organic, inorganic), on whether they are out of water or submerged and on operation mode such as “inside- out”, “outside-in”, “dead-end”, “cross-flow” and so on. This nanofibre filtration unit shall be classified as an organic hollow fibre submerged system with “outside – in” operation.