TABLE 1.
Reactor operating conditions and sludge characteristics
| Operating parametera | Measurement for sludge:
|
|
|---|---|---|
| HP1 | HP2 | |
| Influent PO4-P (mg-P liter−1) | 12.6 | 7.0 |
| Influent COD:Pi (mg mg-P−1) | 16 | 14 |
| TSS (mg liter−1) | 961 | 938 |
| VSS (mg liter−1) | 606 | 576 |
| Phosphorus content of biomass [(mg-P) (mg VSS)−1] | 0.16 | 0.18 |
| Anaerobic Pi releasedb (mol C-mol−1) | 0.67 | 0.66 |
| Anaerobic PHA synthesized (C-mol C-mol−1) | 1.17 | NDc |
| Pi in effluent (mg-P liter−1) | 0.10 | 0.12 |
a
TSS, total suspended solids; VSS, volatile suspended solids; PHA, polyhydroxyalkanoate. All phosphate measurements are reported as P.
b
Normalized to the amount of acetate taken up during the anaerobic phase. Values are reported in terms of carbon-moles (C-mol), with acetate containing 2 C-mol per mol.
c
ND, not determined.