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Table 2 Growth rates of azolla, associated nutrients removals and chlorophyll concentrations in different dilutions of ADSW

From: Dual application of duckweed and azolla plants for wastewater treatment and renewable fuels and petrochemicals production

Azolla (A. filiculoides)
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% NA NA NA NA NA NA NA NA NA
ADSW, 15% -1.5 58 ± 5.7 43.0 ± 3.3 4.38 ± 1.9 23.5 ± 3.9 4.8 ± 1.1 0.12 ± 0.07 NA 6.1 ± 1.1
ADSW, 10% -1.3 28.8 ± 3.3 56.4 ± 3.8 3.73 ± 0.7 10.2 ± 2.2 36.6 ± 3.9 0.59 ± 0.3 6.32 4.1 ± 1.0
ADSW, 5% 1.1 ± 0.1 22.1 ± 2.5 31.2 ± 4.8 1.2 ± 0.3 6.4 ± 1.0 21.4 ± 4.7 0.17 ± 0.03 5.88 2.8 ± 0.8
ADSW, 2.5% 5.6 ± 1.8 0.0 100.0 1.61 ± 0.9 0.8 ± 0.07 82.6 ± 7.6 0.38 ± 0.07 4.30 1.9 ± 0.9
ADSW, 1.2% 4.6 ± 1.1 0.0 100.0 0.88 ± 0.1 0.0 100.0 0.25 ± 0.05 3.51 0.1 ± 0.08
  1. ADSW, anaerobically digested swine wastewater; N, nitrogen; P, phosphorus; NA (not analyzed).