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Table 1 Growth rates of duckweed, 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

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
  1. ADSW, anaerobically digested swine wastewater; N, nitrogen; P, phosphorus; NA (not analyzed).