An Approach Incorporating User Preferences in the Design of Sanitation Systems and Its Application in the Rural Communities of Chiapas, Mexico

Selection of appropriate on-site household sanitation options for rural communities of Zimbabwe - case of Mbire district, Zimbabwe

Selecting an appropriate sanitation option involves multiple stakeholders with often conflicting objectives. A multiple criteria decision analysis (MCDA) framework was developed to inform decision makers on selecting appropriate sanitation options for rural communities. Criteria established from literature were evaluated and weighted on-line by stakeholders. A performance matrix was developed by assigning weights to criteria and scoring alternatives. Selection of alternatives was based on a composite appropriateness index from a rank using the simple multi-attribute ranking technique. The framework was evaluated by verification, validation and sensitivity analysis. Five alternatives were evaluated on 14 decision criteria. The first preferred alternative was the urine diverting dry toilet (72.54) then the Blair ventilated improved pit latrine (67.10). The framework was commented as reasonable and robust. A simple and transparent MCDA framework was developed considering local conditions in a participatory manner to select appropriate alternatives for rural sanitation where a single option is encouraged.

Factors influencing community-led total sanitation (CLTS) implementation abandonment before achieving open defecation-free (ODF) status: case study of the Central-Western region of Burkina Faso

Access to sanitation has become an important element for improving the health of populations in developing countries. In Burkina Faso, 12% of the population in rural areas has access to latrine and 65% practice open defecation (OD). In a bid to eliminate this unsanitary practice and enhance sanitation access in rural areas, the government embraced community-led total sanitation (CLTS) as a national strategy in 2014. However, more than 6 years later, a notable observation is the high abandonment rate, with only a small fraction of rural communities successfully eradicating OD. Out of the 8892 villages in the country, 3546 underwent a CLTS triggering from 2014 to 2020. Nevertheless, in 787 of these villages, the implementation of the CLTS approach was abandoned, indicating a substantial abandonment rate of 22.19%. Until now, most studies on CLTS have focused on the post-ODF phase, emphasizing the question of the sustainability of the results generated by the approach, as if the process from triggering to obtaining ODF certification was not subject to any problems. However, cases of abandonment of the CLTS process after triggering do exist, although poorly documented in the literature, and there are no studies that clearly assign responsibilities to the actors when CLTS implementation comes to be abandoned. This research aims to bridge these gaps by identifying the root causes of these abandonment cases while delineating the distinct responsibilities associated with these instances. To achieve this, the study was conducted in the Central-Western region of Burkina Faso, where all stakeholders involved in CLTS implementation, including target communities, were identified, their different roles in the process defined, and data collected through household surveys, interviews, and focus groups. The content analysis method was used to analyze the data. The research findings indicate that the abandonment of the CLTS implementation process is due to four categories of factors: sociocultural and economic aspects (39.78%), physical conditions (17.52%), governance aspects (26.28%), and the quality of approach implementation (16.42%). Moreover, these factors highlight a shared accountability for abandonment involving the government, implementing organizations, and target communities. These findings have significant implications for the future design of sanitation programs using the CLTS approach. To mitigate abandonment rates in the CLTS implementation process across rural communities, it is imperative for policymakers to attentively consider these factors and integrate the recommendations delineated in this study.

Trade-offs across values in cesspool management highlight challenges to policy making

On-site Sewage Disposal Systems (OSDS) are globally common, and in Hawai'i they present a risk of contamination to drinking water sources and nearshore waters. State legislation has commanded that all cesspools are to be banned by 2050, thus requiring tens of thousands of systems to be converted in the coming decades. This project followed a participatory structured decision-making (SDM) approach to collaboratively design cost-effective and equitable solutions for thousands of cesspools in the high elevation areas of north Maui, Hawai'i. Participatory workshops with a diverse group of stakeholders set ten objectives and brainstormed 33 alternatives, for which the technical team then modeled groundwater nutrients, costs, and equity. All alternatives posed trade-offs, though composting toilets performed best across most objectives, albeit with high maintenance burden. Discounting innovative toilets, the multi-objective analysis suggests that the state should invest in cluster sewering of high-density communities, followed by incentivizing septic tank solutions in properties with the highest effluent flow first, then expanding across the area. The total project cost (installation and operation/maintenance) would be $183-258 million, depending upon the sewer-septic combination. An efficiency frontier reveals sub-par combinations, including aerobic treatment units and passive absorption systems, which cost much more and deliver lower mass flux reduction than more cost-effective alternatives. This study contributes a novel case of rural sanitation to the literature in which decision support tools are used to facilitate evidence-based, collaborative decision-making for sanitation planning. The state could use a similar participatory SDM process when approaching other communities to discuss their cesspool upgrade strategies. Broadening the use of decision analytic techniques can have wider ecological, economic, and social benefits for the state and contexts beyond Hawai'i, as SDM provides a transparent and rigorous, evidence-based decision-theoretic framework to explore multiple values and strategies to address difficult resource management problems.

Biomass-Based Oxygen Reduction Reaction Catalysts from the Perspective of Ecological Aesthetics—Duckweed Has More Advantages than Soybean

Ecological aesthetics encourages the harmonization of humans and nature. In this paper, we integrate ecological aesthetics into the development of oxygen reduction reaction (ORR) catalysts of H2/O2 fuel cells. Moldy soybean and duckweed as raw materials are adopted to prepare biomass-based ORR catalysts, both of which have advantages in activity, stability, environmental protection and resource richness over the conventional expensive and scarce noble metal-based catalysts. Therefore, duckweed is more environmentally friendly, entails a simpler preparation process and has a better catalytic performance, ultimately being more in line with ecological aesthetics.

Rural Sanitation: Scenarios and Public Policies for the Brazilian Semi-Arid Region

Brazil’s primary sanitation sector has been neglected, especially concerning rural sanitation. Population dispersion and the difficulty of access in many rural communities bring more significant challenges to the universalization of the service and, consequently, vulnerabilities for the population. The present work builds a theoretical framework about the context of rural sanitation in Brazil, with history, weaknesses in the sector, the impact of COVID-19 and new technologies, and central public policies in the State of Pernambuco. It is known that COVID-19 has caused considerable challenges that, added to the obstacles to national sanitation, result in greater vulnerability to the population, especially for indigenous peoples, quilombolas, and diffuse rural communities. In the State of Pernambuco, certain policies, such as the One Million Rural Cisterns Program (P1MC), One Land and Two Waters Program (P1 + 2), Água Doce Program and Operação Pipa Program, significantly improved the quality of life of the rural population. However, these measures are not enough to remedy the sector’s shortcomings. Although alternative sanitation technologies bring hope to the sector, there is a long way to go towards the universalization of sanitation.