| 摘要 |
Microorganisms and animal cells are immobilised, especially for anaerobic processes, such as for the purification of waste waters or for the biotechnological production of nutritionally essential and pharmacological substances, using as inorganic carriers porous sintered articles, especially sintered glass in the form of Raschig rings, with a double pore structure, which are characterised by porosity-determining macropores which allow free exchange of liquid and gas from the interior of the carriers to the surroundings, and by open micropores which pass through the macropore walls and whose size is in the region of that of microorganisms or cells. These carriers have an open pore volume of 35 % to 85 %, with 20 % to 80 % deriving from macropores with a pore diameter of 20 to 500 mu m and 15 - 5 % deriving from micropores with a pore diameter of 1 - 10 mu m, and they are obtained by sintering a powdered mixture of fine-particle material and a coarse-particle substance which melts above the sintering temperature and can be dissolved out of the sintered product, allowing to cool and dissolving out the soluble component. |
