FIELD : technological processes.SUBSTANCE : invention relates to separation and concentration of various solutions by micro- and ultrafiltration methods and can be used in food, pharmaceutical, microbiological industries. Membrane apparatus with inflatable sleeves includes a housing, tubular ceramic membrane modules, nozzles for introducing the initial solution, withdrawing a filtrate and concentrate, two-way air valves, sleeves, while the sleeves are connected through a two-way air valves to the compressed air system and are designed with the possibility of increasing the size by inflating them, at the same time, the sleeves are connected equidistantly to each other by means of seals through rigid impermeable partitions, which divide the space between the tubular ceramic membrane modules into sections.EFFECT : technical result of the invention is better performance of the membrane apparatus.1 cl, 4 dwg