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Table 4 Life cycle inventory of Combination IV 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) UF membrane

 Back wash pump

kWh

0.21

 Process water

L

168.8

 NaOH

kg

0.08

(II) 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