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Table 3 Life cycle inventory of Combination III 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 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
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