BUOYANT, SWIRLABLE SUBSTRATE MATERIAL FOR BIOTECHNOLOGICAL PROCESSES

摘要

The invention pertains to a buoyant, swirlable substrate material for surface growth of microorganisms which can be used in processes and installations for extensive water, waste water and sludge treatment and in fermentation. The aim of the invention is to create a substrate material for microbiological processes with which water can be subjected to aerobic and anaerobic-anoxic treatments simultaneously. Even in an aerobic fluidized bed, part of the surface should be colonized by anaerobic-anoxically living microorganisms. The material should be producible within a narrow range of defined density and bulk and should have a large adsorptively active growing surface. The basic material consists of polymer substances, it contains organic and/or inorganic additives, it has a closed-cell foam core and fine-pored cell structures and it is shaped in cylindrical hollow bodies, having a length of 3 to 25 mm, an outside diameter of 3 to 25 mm, an inside diameter of 2 to 24 mm and a density between 0.4 and 0.98 g/cm3.