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Anthropogenic phosphorus flows under different scenarios for the city of Stockholm, Sweden
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.ORCID iD: 0000-0002-2829-2928
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.ORCID iD: 0000-0001-6430-8993
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.ORCID iD: 0000-0002-4530-3414
2016 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 542, 1094-1105 p.Article in journal (Refereed) Published
Abstract [en]

Today, concerns prevail about the unsustainable use of phosphorus and worldwide eutrophication, thus requiring efficient management of phosphorus flows. With increasing population and associated urban growth, urban management of phosphorus flows in the perspectives of recycling, eutrophication and total budget becomes increasingly important. This study mapped phosphorus flows for a reference year (2013) and a future year (2030) using different scenarios for the city of Stockholm, Sweden. The results indicated that the Swedish goal of recycling phosphorus from wastewater would cover the majority of the total phosphorus budget for Stockholm. However, in 2013, only 10% of phosphorus was recycled for agricultural use, around half of which was from sewage sludge and the other half from food waste. Almost 50% of total phosphorus was sent to landfill/mining waste capping with sewage sludge, for economic reasons and lack of market. Among the scenarios of upstream and downstream urban management options studied in combination with population growth, recovery of phosphorus from sewage sludge had the greatest potential to increase the fraction recycled to agriculture. However, only upstream measures, e.g. changed diet, were able to reduce the total phosphorus budget. Urban management of phosphorus flows based on the different perspectives of recycling, eutrophication or total budget was shown to potentially result in different preferred management actions and both upstream and downstream measures need to be considered. Moreover, management needs to pay attention to small but environmentally sensitive flows, particularly when setting city goals on phosphorus recycling by percentage in a large budget.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 542, 1094-1105 p.
Keyword [en]
Phosphorus flow analysis, Scenarios, Phosphorus recycling, Total budget, Eutrophication
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-179256DOI: 10.1016/j.scitotenv.2015.09.024ISI: 000365602300010Scopus ID: 2-s2.0-84949320333OAI: oai:DiVA.org:kth-179256DiVA: diva2:882390
Note

QC 20160105

Available from: 2015-12-14 Created: 2015-12-14 Last updated: 2017-12-01Bibliographically approved
In thesis
1. Systems Perspectives on Modelling and Managing Future Anthropogenic Emissions in Urban Areas: Nitrogen, Phosphorus and Carbon Studies in Stockholm, Sweden
Open this publication in new window or tab >>Systems Perspectives on Modelling and Managing Future Anthropogenic Emissions in Urban Areas: Nitrogen, Phosphorus and Carbon Studies in Stockholm, Sweden
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Managing anthropogenic emissions in urban areas is a major challenge in sustainable environmental development for cities, and future changes and increasing urbanisation may increase this challenge. Systems perspectives have become increasingly important in helping urban managers understand how different changes may alter future emissions and whether current management strategies can efficiently manage these emissions. This thesis provides some systems perspectives that have been lacking in previous studies on modelling and managing future anthropogenic emissions in urban areas. The city of Stockholm, Sweden, was selected as the study site and studies about nitrogen, phosphorus and carbon were chosen, given world-wide urban eutrophication and global concerns about climate change. A substance flow analysis (SFA) structured model, comprising a source model coupled with a watershed model in an SFA structure, was developed to investigate future nutrient loading scenarios under various urban changes in small urban lake catchments. The results demonstrated that climate change potentially posed a greater threat to future nutrient loads to a selected lake catchment in Stockholm than the other scenarios examined. Another SFA-based study on future phosphorus flows through the city of Stockholm indicated that the best management option may depend on the perspective applied when comparing future scenarios of phosphorus flows and that both upstream and downstream measures need to be considered in managing urban phosphorus flows. An evaluation approach for examining current management plans and low-carbon city initiatives using the Driving forces-Pressure-States-Impact-Response (DPSIR) framework, was formulated. With such an evaluation approach, investigation of how well selected plans cover different aspects of the DPSIR framework and whether root causes and systematic measures are highlighted is possible. The results revealed that the current low-carbon city initiative in Stockholm falls within pressure-based, driver-orientated plans and that technical, institutional and cognitional measures are generally well covered. 

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2016. x, 60 p.
Series
TRITA-IM-PHD, 2016:02
Keyword
Anthropogenic emissions, Urban development, Future, Substance flow analysis (SFA), DPSIR.
National Category
Environmental Sciences
Identifiers
urn:nbn:se:kth:diva-186245 (URN)978-91-7595-961-0 (ISBN)
Public defence
2016-06-02, V2, Teknikringen 76, KTH-Campus, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20160510

Available from: 2016-05-10 Created: 2016-05-07 Last updated: 2016-12-15Bibliographically approved

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