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Table 1 Life cycle inventory of Combination I for integrated membrane-filtration system

From: Comparative environmental impact evaluation using life cycle assessment approach: a case study of integrated membrane-filtration system for the treatment of aerobically-digested palm oil mill effluent

Unit operation/component Unit Amount
(I) MBBR
 Clarify water pump (P6102) kWh 2.24
 Air compressor (IA6101) kWh 0.66
 Air m3 8.01
(II) Pre-treatment through sand filters and activated carbon filters
 Biofilm transfer pump (P6103) kWh 1.12
 Back wash pump (P6301) kWh 0.42
 Process water m3 337.5
(III) UF membrane
 Back wash pump (P6301) kWh 0.21
 Process water L 168.75
 NaOH kg 0.08
(IV) RO membrane
 Intermediate transfer pump (P6303) kWh 1.12
 High pressure pump (P6304) kWh 6.6
 Intermediate transfer pump (P6303) -Chemical cleaning kWh 0.37
 High pressure pump (P6304) - Chemical cleaning kWh 2.24
 Process water L 168.8
 NaOH kg 0.08
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