Table 1 Growth rates of duckweed, nutrients removals and chlorophyll concentrations in different dilutions of ADSW
Duckweed (L. punctata) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
ADSW dilutions | Growth rate, g dw/m2-day | NH4-N, mg/L, Final | NH4-N uptake, % | NH4-N uptake rate, mg/l-day | PO4-P, mg/L, Final | PO4-P uptake, % | PO4-P uptake rate, mg/L-day | N/P uptake | Chl A + B μg/ml |
ADSW, 100% | NA | NA | NA | NA | NA | NA | NA | NA | NA |
ADSW, 50% | NA | NA | NA | NA | NA | NA | NA | NA | NA |
ADSW, 25% | -1.6 | 105.1 ± 11.4 | 36.0 ± 3.9 | 5.92 ± 1.7 | 37.1 ± 3.3 | 4.1 ± 1.8 | 0.16 ± 0.07 | NA | 5.9 ± 1.8 |
ADSW, 15% | -1.2 | 45.9 ± 3.3 | 54.9 ± 5.5 | 5.5 ± 1.2 | 21.9 ± 3.0 | 11.3 ± 2.8 | 0.28 ± 0.08 | NA | 6.1 ± 1.1 |
ADSW, 10% | 5.4 ± 2.3 | 8.4 ± 1.7 | 87.3 ± 6.5 | 5.8 ± 1.9 | 8.8 ± 3.7 | 45.3 ± 3.0 | 0.73 ± 0.2 | 7.90 | 5.1 ± 2.4 |
ADSW, 5% | 4.9 ± 2.2 | 2.11 ± 1.1 | 93.5 ± 9.3 | 3.0 ± 1.1 | 4.3 ± 3.0 | 46.9 ± 4.9 | 0.38 ± 0.07 | 7.69 | 4.6 ± 2.2 |
ADSW, 2.5% | 4.3 ± 1.7 | 0.0 | 100.0 | 1.6 ± 0.7 | 2.1 ± 1.7 | 54.3 ± 3.7 | 0.25 ± 0.09 | 6.44 | 3.1 ± 1.0 |
ADSW, 1.2% | 3.0 ± 1.6 | 0.0 | 100.0 | 0.88 ± 0.3 | 1.0 ± 0.8 | 60.1 ± 4.8 | 0.15 ± 0.04 | 5.83 | 2.1 ± 0.1 |