Cited by 38Wastewater Treatment and ReuseGender Studies and Social IssuesInnovation and Socioeconomic Development

Early testing of new sanitation technology for urban slums: The case of the Blue Diversion Toilet

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Tobias, Robert, O'Keefe, Mark, Künzle, Rahel, Gebauer, Heiko, Gründl, Harald, Morgenroth, Eberhard, Pronk, Wouter, Larsen, Tove A.·2017·Science of The Total Environment

Abstract

The toilets used most in informal urban settlements have detrimental consequences for the environment and human health due to the lack of proper collection and treatment of toilet waste. Concepts for safe, sustainable and affordable sanitation systems exist, but their feasibility and acceptance have to be investigated at an early stage of development, which is difficult due to the high costs of building working models. In this paper, we present an approach to estimate acceptance in a valid and representative form with only one working model, and apply it to test an innovative zero-emission toilet with recycling of wash water. Four basic principles were specified for investigation and nine hypotheses formulated to test the feasibility and acceptance of these principles: source separation of urine and feces with subsequent collection for resource recovery; provision of wash water in a separate cycle with on-site recovery through a membrane bioreactor; a convenient and attractive overall design; and a financially sustainable business plan. In Kampala (Uganda), in 2013, data was collected from 22 regular users, 308 one-time users and a representative sample of 1538 participants. Qualitative data was collected from the users, who evaluated their likes, perceived benefits, social norms and expected ease of use based on verbal and visual information. Most of the hypotheses were confirmed, indicating the feasibility and acceptance of the basic principles. Source separation and on-site water recovery were found to be feasible and accepted, provided users can be convinced that the emptying service and water recovery process work reliably. In the survey, the toilet was evaluated favorably and 51% of the participants agreed to be placed on a bogus waiting list. However, some design challenges were revealed, such as the size of the toilet, hiding feces from view and improving the separation of urine and water.

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Registry

Crossref · 10.1016/j.scitotenv.2016.10.057

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49 of 49 references verified0 citation errors · 0 not checkable

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  • Offensive odour was cited by Matsebe & Osman [20] and Tsiagbey et al. [32] as a barrier to the acceptance of household latrine technologies in their assessment of the urine diversion dry toilet.

    “This singular reason (offensive odour) was further cited by Matsebe & Osman, [20] and Tsiagbey et al. [32] as a barrier to the acceptance of household latrine technologies in their assessment of the urine diversion dry toilet.”

    From Early live-prototype testing of a low-cost latrine technology for rural and peri-urban communities: The case of a modified pour-flush latrine (2020) · cites this paper as [32]

    In Design principles (Principle 1; page unavailable), the paper says UDDTs reduce odor and attributes their low acceptance partly to poor comfort and unhygienic appearance, not offensive odor. Its Results (Principle 3; page unavailable) report an odor problem with the Blue Diversion Toilet’s recovered water, but say users continued to use that water despite it. (LLM, conf=0.84)

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  • Latrines with intense odour are perceived as unhygienic and as an indication of the presence of insects on latrines.

    “Latrines with intense odour are therefore perceived as unhygienic [32] as it is also an indication of the presence of insects on latrines.”

    From Early live-prototype testing of a low-cost latrine technology for rural and peri-urban communities: The case of a modified pour-flush latrine (2020) · cites this paper as [32]

    The Results (Principle 2; page unavailable) say users had mixed feelings about the toilet’s recovered water primarily because of odor problems and also doubted its quality. The Discussion says the smell led to more negative evaluations, but does not establish that odorous latrines were perceived as unhygienic. The Results mention flies separately, without linking their presence to odor. (LLM, conf=0.78)

    Experimental — accuracy not yet measured
  • In Tsiagbey et al. [32], only 9% of respondents stated adequate privacy as a reason for their satisfaction with the urine diversion toilet.

    “The issue of privacy was given low priority in the studies by Tsiagbey et al. [32] where only 9% of the respondents stated adequate privacy as a reason for their satisfaction with the urine diversion toilet.”

    From Early live-prototype testing of a low-cost latrine technology for rural and peri-urban communities: The case of a modified pour-flush latrine (2020) · cites this paper as [32]

    The Methods and Results describe evaluations of the Blue Diversion Toilet, including percentages of comments on its features, but do not report adequate privacy as a reason for satisfaction. Searches of our copy for Tsiagbey, privacy, and 9% found no passage supporting the attributed figure. (LLM, conf=0.76)

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Research works printed but not linked: 1

  1. Jackson B. A Review of EcoSan Experience in Eastern and Southern Africa. Water & Sanitation Program Field Note 2005 Washington D.C USA 16 http://www.susana.org/docs_ccbk/susana_download/2-295-jackson-2005-ecosan-experience-in-eastern-southern-africa-wspes.pdf

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Authors
Tobias, R., O'Keefe, M., Künzle, R., Gebauer, H., Gründl, H., Morgenroth, E., Pronk, W., & Larsen, T. A.
Affiliations
  • Swiss Federal Institute of Aquatic Science and Technology (CH)
  • ETH Zurich (CH)
Corresponding author
Tobias, Robert
Venue
Science of The Total Environment
Publisher
Elsevier BV
Published
2017-01
Volume
576
Pages
264-272
ISSN
0048-9697 (ISSN-L)
OpenAlex
W2542473081
Cited by
38
References
49
Citations by year
2025: 1 · 2024: 2 · 2023: 2 · 2022: 4 · 2021: 8 · 2020: 10 · 2019: 6 · 2018: 4 · 2016: 1
FWCI
4.45
Type
journal article
Language
en
Open access
Locations
  • The Science of The Total Environment (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, other-oa)
  • DORA Eawag (Swiss Federal Institute of Aquatic Science and Technology (Eawag)) (submittedVersion, cc-by)
  • Publikationsdatenbank der Fraunhofer-Gesellschaft (Fraunhofer-Gesellschaft) (submittedVersion)
  • Fraunhofer-Publica (Fraunhofer-Gesellschaft) (submittedVersion)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, cc-by)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, other-oa)
  • ETH Zürich Research Collection (cc-by)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
  • Bill and Melinda Gates Foundation (OPP1037484)
  • Direktion für Entwicklung und Zusammenarbeit
Topics
  • Physical Sciences › Environmental Science › Waste Management and Disposal › Wastewater Treatment and Reuse
  • Social Sciences › Gender Studies › Gender Studies and Social Issues
  • Social Sciences › Business, Management and Accounting › Business and International Management › Innovation and Socioeconomic Development
Keywords
urban slums, informal settlements, membrane bioreactor, toilet design, user acceptance, resource recovery, social norms, Kampala
MeSH terms
Humans, Poverty Areas, Sanitation, Toilet Facilities, Uganda, Waste Disposal, Fluid, Water Purification, Recycling

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