Table 1.
Biomass adhering to pumice granules after 6- and 12- month operation
| Operation time (months) | Total biomass (mg cells d.w. g-1 pumice) | |
| Burning | Protein assay | |
| 6 | 2.86 | 3.40 |
| 12 (top) | 9.52 | 3.25 |
| 12 (bottom) | 12.58 | 6.44 |
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