Abstract: The invention relates to a filter unit (1, 19), having: at least one warp-knitted spacer (3) which comprises a first and a second cover layer (4; 5) having in each case a multiplicity of openings (6) which are delimited by peripheral regions (7), wherein threads (8) extend from the peripheral regions (7) of the first cover layer (4) to peripheral regions (7) of the second cover layer (5), and wherein the at least one warp-knitted spacer is rolled, twisted, and/or at least in one portion is compressed.
Abstract: The present invention is directed to a composition for triggering microbiological processes in water, to a kit of parts comprising the components of said composition in distinct form, a method of producing such a composition and the use thereof for microbiologically decomposing water-immiscible substances, in particular crude oil and crude oil-derived substances.