NOVELTY - The filling- and/or vegetating bodies (1) for microorganism for biological treatment of water and sewage water, comprises rows of tube- or tunnel shaped passages (2) comprising outer walls (3) that have a side wall (5) forming U shaped longitudinal channels that pass through the outer surface. The filling- and/or vegetating bodies are a flat three-dimensional body, in which the passages are positioned in longitudinal direction. The outer wall is longitudinally slit on the outer surface or is perforated by means of breakthroughs (4) that are spaced to each other.    USE - Useful as vegetating body for microorganisms for biological cleaning of water and sewage water in a reactor and as a filter for air cleaning (claimed).    ADVANTAGE - The filling- and/or vegetating bodies are economically produceable and have zones, in which gases or liquids due to the structure of the vegetation body linger longer in spite of moving air or moving water, so that ensuring a more optimal and efficient filtration and/or biological conversion of materials in the frame of a biological cleaning.    DETAILED DESCRIPTION - The filling- and/or vegetating bodies (1) for microorganism for biological treatment of water and sewage water, comprises rows of tube- or tunnel shaped passages (2) comprising outer walls (3) that have a side wall (5) forming U shaped longitudinal channels that pass through the outer surface. The filling- and/or vegetating bodies are a flat three-dimensional body, in which the passages are positioned in longitudinal direction. The outer wall is longitudinally slit on the outer surface or is perforated by means of breakthroughs (4) that are spaced to each other and that are arranged in rows. The two rows of the passages or the U-shaped longitudinal channels are separated from each other by a central support wall. The longitudinally slit passages or the U-shaped longitudinal channels in each case have a closed connecting wall on the upper or on the lower outer surface. Webs or web sections that are protruding or extending from the upper surface with the side walls of the longitudinal channels are provided, which irregularly or regularly are distributed over the length and/or the breadth of the outer surface and which form a protection against the damage of the fouling of the hollow space outer surface. The webs or the web sections perpendicularly projecting out of the outer surfaces are arranged in a diagonally running angle to the outer surfaces and/or the front surface. The sidewalls of the outer passages are slit on the front surface or are provided with the U-shaped longitudinal channels. The filling- and/or vegetating bodies have a shape of disk, square, rectangular or a wave like contour when viewed from top. The longitudinal slits or the longitudinal channels have same length or the length of the filling- and/or vegetating bodies are greater than or equal to 6 mm and the passage height is greater than or equal to 2 mm. The height of the protruding webs or web sections are greater than or equal to 1 mm. The pair wise arranged webs or web sections together with the closed connection wall build a hollow area of a U-shaped groove on the outer surfaces. The protected area is larger than 1000 m2/m3 or 1500 m2/m3. The breakthrough running perpendicular to the longitudinal axis of the passages is less than or equal to the distance of the sidewalls that border on the sides of the passages. The clearance width of the longitudinal slits is greater than or equal to 1 mm. The U-shaped longitudinal channels have an opening width of greater than or equal to 2 mm. The microorganism settles itself in the protected inner side of the longitudinal slits or channels. Catalytic material is embedded or applied on the protected outer surfaces of the longitudinal channels or the longitudinal passages.    DESCRIPTION OF DRAWING(S) - The figure shows filling- and/or vegetating bodies for microorganism for biological treatment of water and sewage water.    Filling- and/or vegetating bodies (1)    Passages (2)    Outer walls (3)    Breakthroughs (4)    Side wall. (5)