Table 2.
Comparison of nitrogen-elimination rates of shrimp shells by enrichment cultures M1 and M2
| Time period (h) | Wet shell assay M1 (mg N/h) 5.1 g dry weight | Wet shell assay M2 (mg N/h) 5.1 g dry weight | Dry shell assay M1 (mg N/h) 14.1 g dry weight | Dry shell assay M2 (mg N/h) 14.1 g dry weight |
|---|---|---|---|---|
| 0-20 |
0.35 |
0.36 |
0.80 |
1.08 |
| 20-48 |
0.15 |
0.18 |
0.33 |
0.38 |
| 48-72 |
0.13 |
0.16 |
0.29 |
0.24 |
| 72-96 |
n.d. |
n.d. |
0.23 |
0.18 |
| 96-120 | n.d. | n.d. | 0.09 | 0.12 |
The total mass addition to assays with wet and dried shrimp shells was 15 g, resulting in different dry weight amounts.