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Development and testing of a water-efficient laundry system in informal settlements of eThekwini municipality, South Africa

Mathenjwa, S, Bond, T, Ndwandwe, B, Xulu, S, Kiambi, SL, Buckley, C and Roma, E (2012) Development and testing of a water-efficient laundry system in informal settlements of eThekwini municipality, South Africa Journal of Water, Sanitation and Hygiene for Development, 2 (1). pp. 31-39.

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Abstract

In the informal settlements of eThekwini municipality, South Africa, laundry activities are typically undertaken at local standpipes and washbasins of community ablution blocks (CABs), and are characterised by high levels of water consumption and greywater production. Since greywater contains a high pollution load, including sodium tripolyphosphate, it poses a significant environmental and public health risk. The overall objective of this study was to develop and test a water-efficient laundry system designed for informal settlements. Initial fieldwork at a standpipe and CAB in eThekwini municipality showed respectively 56 and 58% of users were in favour of a water-efficient laundry system based upon sharing washing water. Subsequent laboratory work assessed crosscurrent and countercurrent cascades for washing clothes. Under optimised washing conditions at a detergent dose of 5 g/kg water, specific water consumption of 5 kg water/kg clothes and three rinsing phases it was determined that the countercurrent method wasted 33% less water. Thus the countercurrent cascade has great potential for minimising greywater production in South African informal settlements. Future work should concentrate on evaluating greywater production, detergent usage and social acceptability in the field.

Item Type: Article
Subjects : Civil Engineering
Authors :
NameEmailORCID
Mathenjwa, SUNSPECIFIEDUNSPECIFIED
Bond, Tt.bond@surrey.ac.ukUNSPECIFIED
Ndwandwe, BUNSPECIFIEDUNSPECIFIED
Xulu, SUNSPECIFIEDUNSPECIFIED
Kiambi, SLUNSPECIFIEDUNSPECIFIED
Buckley, CUNSPECIFIEDUNSPECIFIED
Roma, EUNSPECIFIEDUNSPECIFIED
Date : March 2012
Identification Number : 10.2166/washdev.2012.068
Copyright Disclaimer : © IWA Publishing 2012
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:57
Last Modified : 18 May 2017 12:53
URI: http://epubs.surrey.ac.uk/id/eprint/840976

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