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Table 1

TN, NH4+-N and biomass concentrations during the experiment (4)

Culture mediumDuration (days)NH4+-N concentration (mg NH4-N·L−1)
TN concentration (mg·L−1)
Biomass concentration (g·L−1)
InitialFinalInitialFinalInitialFinal
Permeate 62.1 ± 7.6 30.5 ± 1.6 104.3 ± 1.7 41.3 ± 1.9 0.20 ± 0.03 1.51 ± 0.07 
Addition of Fe, Mg, Mn, S and EDTA after 5 days 23.5 ± 1.4 0.073 ± 0.001 – 14.8 ± 1.6 1.58 ± 0.08 4.77 ± 0.49 
Addition of Fe, S and EDTA after 5 days 24.2 ± 3.2 0.067 ± 0.017 – 12.1 ± 0.8 1.73 ± 0.12 3.90 ± 0.37 
Culture mediumDuration (days)NH4+-N concentration (mg NH4-N·L−1)
TN concentration (mg·L−1)
Biomass concentration (g·L−1)
InitialFinalInitialFinalInitialFinal
Permeate 62.1 ± 7.6 30.5 ± 1.6 104.3 ± 1.7 41.3 ± 1.9 0.20 ± 0.03 1.51 ± 0.07 
Addition of Fe, Mg, Mn, S and EDTA after 5 days 23.5 ± 1.4 0.073 ± 0.001 – 14.8 ± 1.6 1.58 ± 0.08 4.77 ± 0.49 
Addition of Fe, S and EDTA after 5 days 24.2 ± 3.2 0.067 ± 0.017 – 12.1 ± 0.8 1.73 ± 0.12 3.90 ± 0.37 

The errors represent the standard deviations of the triplicates.

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