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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/13076

Title: Redesigning the ventilated improved pit latrine for use in built-up low-income settings
Authors: Obeng, Peter A.
Oduro-Kwarteng, Sampson
Keraita, Bernard
Bregnhøj, Henrik
Abaidoo, Robert C.
Awuah, Esi
Konradsen, Flemming
Keywords: dry sanitation technology
multidirectional VIP
ventilation rate
VIP latrine
Issue Date: Feb-2019
Publisher: Journal of Water, Sanitation and Hygiene for Development
Citation: Journal of Water, Sanitation and Hygiene for Development, 9(2)
Abstract: The ventilated improved pit (VIP) latrine has the potential to address the challenge of access to improved sanitation in built-up low-income settings. However, its conventional technical design fails to address the needs and preferences of some users. The objective of this paper was to test the technical performance of modified engineering designs of the technology to respond to some preferences of toilet users. The entry of air from multiple windows in the superstructure and installation of insect screens in windows were tested in an experimental VIP latrine. The modified design achieved the recommended ventilation rate of 20 m3/h when a vent pipe diameter of 150 mm was used. The study concludes that adopting a multidirectional airflow design leads to a lower ventilation rate as compared to the conventional design. However, when fitted with the recommended size of vent pipe, this modified design achieves more than twice the recommended ventilation rate with or without an insect screen installed in the windows. Nevertheless, the practice in which 100 mm diameter vent pipes are used with insect screens installed in windows is likely to lead to odour problems due to inadequate ventilation through the vent pipe.
Description: This article has been published in Journal of Water, Sanitation and Hygiene for Development and is available at DOI: 10.2166/washdev.2019.098
URI: 10.2166/washdev.2019.098
Appears in Collections:College of Science

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