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Negativa miljöeffekter av mättade fosforfilter som gödningsmedel: En studie om utsläpp och miljöpåverkan vid gödsling med Polonite och Filtralite på olika jordar i Umeå
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2012 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Environmental effects from saturated filter materials when used as fertilizers

A study of emissions and environmental impacts from Polonite and Filtralite added to different soils in Umeå

The purpose of this study was to elucidate environmental impacts from saturated filter materials for phosphorus removal in sewage systems when later used as fertilizers. The objectives were answered through a fertilizer experiment where different soils from Umeå were manured with the saturated filter materials Polonite and Filtralite and the traditional fertilizer NPK. The leakage waters from the different soil additives were analyzed and measurements were made for phosphorus, nitrogen, calcium, pH and heavy metals. The result showed no obvious difference in leakage potential for ecologically harmful substances from the different fertilizers. The differences in leakage potential for the different soils from the fertilizer experiment are a result of original nutrient- and heavy metal contents in the soils rather than soil properties like porosity, organic content and grain size. Environmental disadvantages with using filter materials as fertilizers can be (i) difficulties with dosing the filter materials as the content of different substances depend on contents in the sewages, (ii) presence of heavy metals, (iii) sometimes unwanted increase in pH due to high calcium content in the filters and (iv) that relatively big amounts of filter material often is needed compared to traditional fertilizers. As this study was very small and many aspects were not included, more research is needed to determine the total environmental impact of filter materials used as fertilizers.

Place, publisher, year, edition, pages
2012. , 36 p.
Keyword [en]
Polonite, Filtralite, fertilizer, phosphorus, soil
National Category
Other Natural Sciences
URN: urn:nbn:se:umu:diva-58726OAI: diva2:549912
Subject / course
Examensarbete i miljö och hälsoskydd
Educational program
Bachelor of Science in Environmental Health
Life Earth Science
Available from: 2012-09-05 Created: 2012-09-05 Last updated: 2012-09-06Bibliographically approved

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