Table 3 Life cycle inventory of Combination III for integrated membrane-filtration system
Unit operation/component | Unit | Amount |
|---|---|---|
(I) MBBR | ||
 Clarify water pump | kWh | 2.24 |
 Air compressor | kWh | 0.66 |
 Air | m3 | 8.0 |
(II) Pre-treatment through sand filters and activated carbon filters | ||
 Biofilm transfer pump | kWh | 2.24 |
 Back wash pump | kWh | 0.56 |
 Process water | m3 | 337.5 |
(III) RO membrane | ||
 Intermediate transfer pump | kWh | 1.12 |
 High pressure pump | kWh | 6.6 |
 Intermediate transfer pump - Chemical cleaning | kWh | 0.75 |
 High pressure pump - Chemical cleaning | kWh | 4.42 |
 Process water | L | 168.8 |
 NaOH | kg | 0.16 |