TABLE 3.
Physicochemical characteristics of the water in the HRAP and in the cellulose semipermeable bags
| Characteristica | Value for water from:
|
|||
|---|---|---|---|---|
| Pond A (3 days)
|
Pond B (10 days)
|
|||
| HRAP | Liquid of semipermeable bag | HRAP | Liquid of semipermeable bag | |
| pH | 8.96 | 8.88 | 9.02 | 9.0 |
| Temp (°C) | 4.9 | 5.1 | 6.6 | 6.8 |
| DO (ppm) | 25.2 | 26 | 26.4 | 26.4 |
| Cond. (μS/cm) | 316 | 123b | 361 | 187b |
| CODd (mg of O/liter) | 31.57 | 31.41 | 30.76 | 30.24 |
| N-NH4+ (mg of N/liter) | 1.46 | 1.23 | 1.68 | 1.49 |
| P-PO43− (mg of P/liter) | 1.08 | 1.05 | 1.45 | 1.38 |
a
DO, dissolved oxygen; Cond., conductivity; CODd, dissolved organic matter.
b
P < 0.05 for HRAP value versus control liquid value, by Mann-Whitney U test.