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Phosphate release by Renpho sludge, determined after an incubation period of 1 h in the presence of several nitrogen oxidesa
| Addition | Concn (mM) | Mean ± SD of phosphate release (mg of P/g of [dry] weight−1) |
|---|---|---|
| None (control) | 7.7 ± 0.0 | |
| Nitrate | 3.6 | 4.8 ± 0.8 |
| Nitrite | 3.6 | 4.1 ± 0.2 |
| NO | 3.6b | 3.4 ± 1.3 |
| Nitrous oxide | 3.6b | 7.7 ± 0.1 |
| Hydroxylamine | 3.6 | 6.5 ± 0.2 |
Data are the averages of two independent incubations.
Concentration in the liquid phase.
