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Hennigs J, Ravndal KT, Blose T, Toolaram A, Sindall RC, Barrington D, Collins M, Engineer B, Kolios AJ, McAdam E, Parker A, Williams L, Tyrrel S. Field testing of a prototype mechanical dry toilet flush. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 668:419-431. [PMID: 30852218 PMCID: PMC6450599 DOI: 10.1016/j.scitotenv.2019.02.220] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/13/2019] [Accepted: 02/14/2019] [Indexed: 05/05/2023]
Abstract
A prototype of a non-fluid based mechanical toilet flush was tested in a semi-public, institutional setting and in selected peri-urban households in eThekwini municipality, Republic of South Africa. The mechanism's functionality and users' perception of the flush were assessed. User perception varied depending on background: Users accustomed to porcelain water flush toilets were open to, yet reserved about the idea of using a waterless flush in their homes. Those who commonly use Urine Diversion Dehydration Toilets were far more receptive. The user-centred field trials were complemented by a controlled laboratory experiment, using synthetic urine, -faeces, and -menstrual blood, to systematically assess the efficiency of three swipe materials to clean the rotating bowl of the flush. A silicone rubber with oil-bleed-effect was found to be the best performing material for the swipe. Lubrication of the bowl prior to use further reduced fouling. A mechanical waterless flush that does not require consumables, like plastic wrappers, is a novelty and could - implemented in existing dry toilet systems - improve acceptance and thus the success of waterless sanitation.
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Affiliation(s)
- Jan Hennigs
- School of Water, Energy and Environment, Cranfield University, United Kingdom
| | - Kristin T Ravndal
- School of Water, Energy and Environment, Cranfield University, United Kingdom
| | - Thubelihle Blose
- Pollution Research Group, University of KwaZulu-Natal, South Africa
| | - Anju Toolaram
- School of Water, Energy and Environment, Cranfield University, United Kingdom
| | | | - Dani Barrington
- School of Water, Energy and Environment, Cranfield University, United Kingdom
| | - Matt Collins
- School of Water, Energy and Environment, Cranfield University, United Kingdom
| | - Bhavin Engineer
- School of Water, Energy and Environment, Cranfield University, United Kingdom
| | - Athanasios J Kolios
- School of Water, Energy and Environment, Cranfield University, United Kingdom
| | - Ewan McAdam
- School of Water, Energy and Environment, Cranfield University, United Kingdom
| | - Alison Parker
- School of Water, Energy and Environment, Cranfield University, United Kingdom
| | - Leon Williams
- School of Water, Energy and Environment, Cranfield University, United Kingdom
| | - Sean Tyrrel
- School of Water, Energy and Environment, Cranfield University, United Kingdom.
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Mondragon NI, Txertudi MB. Understanding menstruation: Influence of gender and ideological factors. A study of young people's social representations. FEMINISM & PSYCHOLOGY 2019. [DOI: 10.1177/0959353519836445] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This research investigates social representations of menstruation. It analyses firstly how young Spanish people understand menstruation in their everyday lives. And secondly, it explores how gender and ideological factors (liberal vs. conservative; feminist vs. non-feminist) impact on the meaning of menstruation and its implications for acceptance of this process. A free association exercise elicited by the word “menstruation” was answered by 250 people and the content was examined by lexical analysis. The results divided social representations of menstruation into two levels: firstly, a traditionalist level that is clearly linked to a negative stigmatized discourse about menstruation; and, secondly, a progressive level where two different discourses emerge, one representing liberal men and the other representing feminist women. The results show that only the feminist conception of menstruation provides an empowered and emotionally positive representation. The concept of menstruation is concluded to emerge from various sources of information, values and social conventions that are somewhat removed from its scientific meaning. The representation of menstruation is therefore understood to be situated within a social, ideological and emotional context. Accordingly, health education campaigns should frame their discourse about menstruation within a feminist perspective as their point of departure, thereby increasing their effectiveness.
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