| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve an efficiency in deodorization treatment of an odorant gas containing a sulfur series odorant with a microorganism to improve the miniaturization and treating performance of a biological deodorizer. <P>SOLUTION: An upstream packed bed 21 and a downstream packed bed 31 are formed by each filling deodorization treating chambers 20, 30 of the biological deodorizer 1 with a porous ceramic-made carrier where the microorganism that decomposes the sulfur series odorant is immobilized, after an easily decomposable sulfur series odorant is mainly decomposed by allowing the odorant gas to pass through the bed 21 and a hardly decomposable sulfur series odorant is mainly decomposed by allowing the remaining gas to pass through the bed 31. The size of the carrier in the bed 31 is made smaller that of the carrier in the bed 21 and a carrier surface area and a total carrier surface area per unit volume in the bed 31 are made bigger than those of both the areas in the bed 21. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
