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Socio-environmental consideration of phosphorus flows in the urban sanitation chain of contrasting cities
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Biology. Linköping University, Faculty of Science & Engineering. Natl Acad Sci, DC 20418 USA; Washington State Univ, WA 99164 USA.
Washington State Univ, WA 99164 USA.
Idaho State Univ, ID 83209 USA.
McGill Univ, Canada.
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2018 (English)In: Regional Environmental Change, ISSN 1436-3798, E-ISSN 1436-378X, Vol. 18, no 5, p. 1387-1401Article in journal (Refereed) Published
Abstract [en]

Understanding how cities can transform organic waste into a valuable resource is critical to urban sustainability. The capture and recycling of phosphorus (P), and other essential nutrients, from human excreta is particularly important as an alternative organic fertilizer source for agriculture. However, the complex set of socio-environmental factors influencing urban human excreta management is not yet sufficiently integrated into sustainable P research. Here, we synthesize information about the pathways P can take through urban sanitation systems along with barriers and facilitators to P recycling across cities. We examine five case study cities by using a sanitation chains approach: Accra, Ghana; Buenos Aires, Argentina; Beijing, China; Baltimore, USA; and London, England. Our cross-city comparison shows that London and Baltimore recycle a larger percentage of P from human excreta back to agricultural lands than other cities, and that there is a large diversity in socio-environmental factors that affect the patterns of recycling observed across cities. Our research highlights conditions that may be "necessary but not sufficient" for P recycling, including access to capital resources. Path dependencies of large sanitation infrastructure investments in the Global North contrast with rapidly urbanizing cities in the Global South, which present opportunities for alternative sanitation development pathways. Understanding such city-specific social and environmental barriers to P recycling options could help address multiple interacting societal objectives related to sanitation and provide options for satisfying global agricultural nutrient demand.

Place, publisher, year, edition, pages
SPRINGER HEIDELBERG , 2018. Vol. 18, no 5, p. 1387-1401
Keywords [en]
Phosphorus; Sanitation; Sustainability; Socio-environmental factors; Urban
National Category
Human Geography
Identifiers
URN: urn:nbn:se:liu:diva-148377DOI: 10.1007/s10113-017-1257-7ISI: 000432987600013OAI: oai:DiVA.org:liu-148377DiVA, id: diva2:1219033
Note

Funding Agencies|National Socio-Environmental Synthesis Center (SESYNC) from the National Science Foundation [DBI-1052875]

Available from: 2018-06-15 Created: 2018-06-15 Last updated: 2018-07-03

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