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Table 3

Metals concentrations of anaerobic digestate before and after desulfurization-nitrification treatment

Essential metals for microalgae
Inhibitory metals for microalgae
MetalConcentration (mg L−1)
Change (%)MetalConcentration (mg L−1)
Change (%)
InfluentEffluentInfluentEffluent
Mg 3.2 2.9 −10.5 Al 0.35 0.18 −50.1 
31.2 39.5 26.6 Co 0.16 0.04 −73.8 
Ca 19.4 5.3 −72.5 Ni 0.29 0.19 −34.4 
Fe 0.34 0.10 −70.6 Cu 0.44 0.13 −70.7 
Mna 0.08 0.02 −71.4 Cd 0.19 0.07 −66.3 
Zna 0.19 0.06 −65.4 Pb 0.75 0.15 −80.5 
Essential metals for microalgae
Inhibitory metals for microalgae
MetalConcentration (mg L−1)
Change (%)MetalConcentration (mg L−1)
Change (%)
InfluentEffluentInfluentEffluent
Mg 3.2 2.9 −10.5 Al 0.35 0.18 −50.1 
31.2 39.5 26.6 Co 0.16 0.04 −73.8 
Ca 19.4 5.3 −72.5 Ni 0.29 0.19 −34.4 
Fe 0.34 0.10 −70.6 Cu 0.44 0.13 −70.7 
Mna 0.08 0.02 −71.4 Cd 0.19 0.07 −66.3 
Zna 0.19 0.06 −65.4 Pb 0.75 0.15 −80.5 

aMetals which inhibit microalgae under high concentration.

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