Table 1.
Parameters | Units | Period |
|||
---|---|---|---|---|---|
II | III | IV | V | ||
As(III) volumetric load | mg As/Lr·d | 178.9±34.8 | 259.2±52.8 | — | 242.9±14.8 |
As(III) removal efficiency | % | 88.38±7.2 | 92.71±10.6 | — | 98.58±1.8 |
As(III) removed | mM | 2.52±0.38 | 3.56±0.57 | — | 3.55±0.22 |
As(V) formed | mM | 2.39±0.31 | 3.32±0.48 | — | 3.33±0.27 |
As(V) formed /As(III) removed | mol/mol | 0.90±0.15 | 0.95±0.15 | — | 0.94±0.06 |
NO3− removed | mM | 2.36±0.53 | 2.63±0.57 | 1.18±0.31 | 2.56±0.41 |
Corrected NO3− removed | mM | 1.24±0.49 | 1.45±0.57 | — | 1.38±0.41 |
As(III) removed/corrected* NO3− removed | mol/mol | 2.49±0.98 | 2.75±0.90 | — | 2.83±0.74 |
As(V) formed/corrected* NO3− removed | mol/mol | 2.32±0.95 | 2.50±0.15 | — | 2.65±0.71 |
Corrected for endogenous nitrate consumption measured in period IV