Parameter (per 1 m3 of treated water) | WWTP1 Na | WWTP2 La | WWTP3 Ph | WWTP4 Iz |
Inputs | ||||
Total electricity (kWh)1 | 2.13 | 0.4454 | 0.811 | 0.615 |
Chlorine (kg)1 | 0.1263 | 2.15E−02 | .0060 | 0.0869 |
Polymer (kg)1 | −−− | 0.02204 | 0.3590 | −−− |
Truck use (tkm) | 0.00068 | 0.0245 | 1.057 | 0.0035 |
Outputs | ||||
Energy recovery (kWh) | −−− | 0.42 | −−− | −−− |
Avoided impacts | ||||
P as fertilizer avoided (kg) | −−− | 0.06459 | 0.0305 | −−− |
Emissions to water (kg) | ||||
Biochemical oxygen demand | 0.048 | 0.0153 | 0.002 | 0.00465 |
Chemical oxygen demand | 0.025 | 0.02 | 0.02 | 0.04034 |
Total suspend solids | 0.014 | 0.018 | 0.003 | 0.00811 |
Total nitrogen | 0.028 | 0.01 | 0.00235 | 0.00546 |
Total phosphorus | 0.0067 | 0.001 | 0.0026 | 0.004955 |
Mn | 0.00019 | 0.00035 | 0.00035 | 0.0000427 |
Cu | 0.000488 | 0.000043 | 0.000043 | 0.00026 |
Fe | 0.00076 | 0.00013 | 0.00013 | 0.0001455 |
Pb | 0.00082 | 0.00073 | 0.00073 | 0.0000689 |
Zn | 0.0000557 | 0.000081 | 0.000081 | 0.0000325 |
Emissions to soil (kg) | ||||
Sludge (dry matter) | 0.068 | 0.1293 | 5.28 | 0.0043 |
Cd | 5.80E−06 | 0.000085 | 0.000085 |
|
As | 5.12E−06 | 0.000075 | 0.000075 | 3.27E−07 |
Cu | 0.000293 | 0.00043 | 0.00043 | 3.71E−07 |
Hg | 3.89E−06 | 0.000057 | 0.000057 | 2.94E−07 |
Ni | 2.86E−05 | 0.00042 | 0.00042 | 1.83E−06 |
Pb | 5.73E−05 | 0.00084 | 0.00084 | 3.67E−06 |
Zn | 0.0005123 | 0.0075 | 0.0075 | 3.27E−05 |
Emissions to air | ||||
Biogas produced in anaerobic digestion (m3) | −−− | 2.054E−06 | 0.1251 | −−− |