| 摘要 |
<p>A biological filter element includes a support element (10) of generally ellipsoidal configuration. The support element (10) has two opposite polar regions and includes a medial ring (12) intermediate the two opposite polar regions and a plurality of arcuate ribs extending from the medial ring to each polar region. Adjacent arcuate ribs (16) are angulary spaced to provide access to an interior space of the support element (10). A cohesive body of biologically active material (20) surrounds the support element (10) and penetrates the interior space of the support element (10).</p> |
