Table 1.
Membrane bioreactor unit life cycle inventory (LCI).
| Element | Input | Output | Quantity/Day | Quantity /FU | Unit | Notes |
|---|---|---|---|---|---|---|
| Sewage Treatment Unit | Capacity 1.9 × 108 L/year (20 years lifetime) |
5.21 × 105 | 1.01 × 10−7 | items | Ecospold 2 1/5 of conventional unit size |
|
| Wastewater Qin | 528 m3/day | 528 | 1.03 | m3 | ||
| Influent Pump Electricity | 7.67 kW × 7.34 h/day | 56.3 | 1.10 × 10−1 | kWh | ||
| Denitrification Mixer Electricity | 1.2 kW × 24 h/day | 28.8 | 5.60 × 10−2 | kWh | ||
| Aeration Blower Electricity | 10 kW × 24 h/day | 240 | 4.67 × 10−1 | kWh | ||
| Membrane Blower Electricity | 12 kW × 24 h/day | 288 | 5.60 × 10−1 | kWh | ||
| Membranes [39] | 450 kg | 0.25 | 4.80 × 10−4 | Kg | Polyethylene instead of Polyethersulfone (PES), 5 years lifetime |
|
| Sludge Circulation Pump Electricity | 4 kW × 24 h/day | 96 | 1.87 × 10−1 | kWh | ||
| Sludge Removal Pump Electricity | 0.25 kW × 6 h/day | 1.5 | 2.92 × 10−3 | kWh | ||
| Diffuse Pump Electricity | 0.60 kW × 24 h/day | 14.4 | 2.80 × 10−2 | kWh | ||
| Q Sludge Out | 14 m3/day | 130 Kg/day | 130 | 2.53 × 10−1 | Kg | To landfill |
| Sludge Transportation | 35 Km × 14 m3/day | 4550 | 8.85 | Km Kg | Lorry EURO6 10 tons |
|
| Treated Wastewater Qout | 514 m3/day | 514 | 1.00 | m3 |