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- Bauer, Torben
(författare)
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Sustainable Sewage Sludge Management : Addressing Multidisciplinary Challenges
- 2023
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This PhD thesis focuses on multidisciplinary challenges in sewage sludge management and how they can be addressed to increase sustainability. Sewage sludge is the residual from wastewater treatment. It contains both resources and contaminants making its management challenging. In the past sewage sludge was often used as a fertilizer in agriculture, a practice that is still used in several countries. Today, this practice gets questioned in Europe and especially in Sweden due to the presence of contaminants in the sludge. At the same time, the resources in the sludge get into a stronger focus as society moves towards a circular economy and food production should get more resilient in a world with geopolitical challenges. In sustainable sewage sludge management, the two goals of immobilising/destroying the contaminants and utilizing the resources in the sludge are combined. This thesis identifies challenges in various disciplines and provides potential solutions to make sewage sludge management more sustainable. The discussed challenges cover the following areas: legislation (EU and Sweden), perception of sewage sludge (Sweden), research on sewage sludge management (international), and combinations of treatment methods. Results show that outdated legislation in Sweden creates insecurities, while the negative perception of sewage sludge in Swedish society further aggravates these insecurities. Although technical solutions are available or under development, e.g., treatment combinations that can separate resources and contaminants, actors in Sweden remain hesitant due to the aforementioned insecurities. This thesis emphasizes that interdisciplinary approaches, and dialogues between different actor groups and society are essential. The multitude of challenges requires solutions that combine technical and non-technical approaches. Therefore, this thesis provides recommendations for more sustainable sewage sludge management practices, including updating legislation.
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| 2. |
- Bergman, Anders, et al.
(författare)
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Carbonate precipitation in alkaline wastes
- 1996
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Ingår i: 12th International conference on solid waste technology and management.
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Konferensbidrag (refereegranskat)abstract
- Carbonate precipitation is known to occur in landfilled ashes and is often reported as a problem because of the precipitates tendency to clog drains and other leachate transport facilities. The Up-take of carbon dioxide by alkaline wastes and leachates will influence their properties e.g.; The hydraulic and gas conductivity of solid wastes will decrease as carbonates precipitate in the pores of the waste. The pH will change towards neutral values as carbonates form changing the mobility of metals and other elements A neutral pH will also allow biological reactions to act on the waste, especially if the waste contain organic material as e.g. ashes often do. Adding carbon dioxide to wastes can thus be a cheap and powerful treatment, yielding a less hazardous waste.
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| 3. |
- Brundin, Herman, et al.
(författare)
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Långtidsegenskaper hos tätskikt innehållande bentonit
- 2001
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Bentonit är en starkt vattenupptagande och svällande naturlig lera med låg vattengenomsläpplighet. Huvudkomponenten är mineralet montmorillonit, som tillhör gruppen smektiter och som ger bentoniten dess unika egenskaper. Syftet med uppdraget är att söka identifiera vilka mekanismer och faktorer som kan vara begränsande för funktionen på kort och lång sikt hos tätskikt innehållande bentonitmattor samt blandningar av bentonit och andra material. I rapporten ges underlag för projektering, utformning och drift av deponier med tätskikt innehållande bentonit. Där redovisas också tre fallstudier från Högbytorp, Löt och Tveta.
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| 6. |
- Ecke, Holger, et al.
(författare)
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Multivariate data analysis (MVDA) in landfill research
- 1998
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Ingår i: The Journal of Solid Waste Technology and Management. - 1088-1697. ; 25:1, s. 33-39
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Tidskriftsartikel (refereegranskat)abstract
- Multivariate data analysis (MVDA), a new statistical approach in terms of landfill research, was performed at the evaluation of data sets from three investigations. The interrelationships among variables as well as variation between observations could be examined. Causal relations between experimental factors and response variables have been identified using scatterpott interpretation. The ease of using MVDA at data evaluation is proved. MVDA techniques as follows were applied: principal component analysis (PCA), partial least squares modelling (PLS) and partial least squares discriminant analysis (PLS-DA).
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| 7. |
- Ecke, Holger, et al.
(författare)
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Multivariate data analysis (MVDA) in landfill research
- 1996
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Ingår i: Proceedings of the 12th International Conference on Solid Waste Technology and Management. - : Indiana University of Pennsylvania.
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Konferensbidrag (refereegranskat)abstract
- Multivariate data analysis (MVDA), a new statistical approach in terms of landfill research, was performed on the evaluation of three investigations. It gains advantage over classical statistical methods when multiple variables and their interactions have to be considered. In addition, it is tolerant for incomplete datasets. MVDA techniques as follows were applied: principal component analysis (PCA), partial least squares modelling (PLS) and partial least squares discriminant analysis (PLS-DA). The interrelationships among variables as well as variation between observations could be examined and illustrated by a few plots.
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| 10. |
- Lagerkvist, Claes-Ingvar, et al.
(författare)
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A study of Cybele asteroids
- 2005
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Ingår i: Astron.&Astrophys 432. ; , s. 349-354
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Tidskriftsartikel (populärvet., debatt m.m.)
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