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Hållbar hantering av uttjänt filtermaterial från fosforfällor - Gödseleffekt och miljöpåverkan

Thynell, Anna LU (2011) MVEM12 20111
Studies in Environmental Science
Abstract
Phosphorus-filter with reactive filter material has shown good potential to reduce P in wastewater from single households. In 2006 the Swedish EPA updated the restrictions for wastewater treatment for single households(NFS 2006:7) according to the environmental code. Apart from minimizing nutrient loss the new restrictions also suggests that phosphorus(P) in the filter should be recycled back to arable land, if there are practical solutions that allow this. The potential to re-use P in the filter material, once the filter has been saturated is investigated in this project. Two materials (Filtra P and Polonite) both with a high content of calcium are considered. The aim is to find a sustainable method to recycle filter material in three... (More)
Phosphorus-filter with reactive filter material has shown good potential to reduce P in wastewater from single households. In 2006 the Swedish EPA updated the restrictions for wastewater treatment for single households(NFS 2006:7) according to the environmental code. Apart from minimizing nutrient loss the new restrictions also suggests that phosphorus(P) in the filter should be recycled back to arable land, if there are practical solutions that allow this. The potential to re-use P in the filter material, once the filter has been saturated is investigated in this project. Two materials (Filtra P and Polonite) both with a high content of calcium are considered. The aim is to find a sustainable method to recycle filter material in three municipalities (Eslöv, Hörby and Höör) that could be easily applied in the existing wastemanagement. Blending the filter material with garden compost from the three municipalities is tested in a pot experiment during six weeks. P-fertilizer potential, effect on soil pH and the effect on heavy metal levels in the leachate is measured.
Commercial fertilizer as well as municipal sewage and wood ash were tested parallel to the filter material for comparison. The results show that Filtra P and Polonite had no significant effect on the pH of the compost. Both material increases the amount of P in the compost but the method of analysis of plant-available phosphorus was misleading since it showed calciumbound fractions that most likely were not readily available for the plant. While treatment of the easily available calciumphosphate showed a significant increase in growth of wheat grown in the compost, there was no increase in growth in the treatments with Filtra P or Polonite. No effect on levels of heavy metals in the leachate could be seen for any of the treatments (Filtra P, Polonite, municipal sewage or woodash. (Less)
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author
Thynell, Anna LU
supervisor
organization
course
MVEM12 20111
year
type
H2 - Master's Degree (Two Years)
subject
language
Swedish
id
3053376
date added to LUP
2012-09-14 16:52:34
date last changed
2012-09-14 16:52:34
@misc{3053376,
  abstract     = {Phosphorus-filter with reactive filter material has shown good potential to reduce P in wastewater from single households. In 2006 the Swedish EPA updated the restrictions for wastewater treatment for single households(NFS 2006:7) according to the environmental code. Apart from minimizing nutrient loss the new restrictions also suggests that phosphorus(P) in the filter should be recycled back to arable land, if there are practical solutions that allow this. The potential to re-use P in the filter material, once the filter has been saturated is investigated in this project. Two materials (Filtra P and Polonite) both with a high content of calcium are considered. The aim is to find a sustainable method to recycle filter material in three municipalities (Eslöv, Hörby and Höör) that could be easily applied in the existing wastemanagement. Blending the filter material with garden compost from the three municipalities is tested in a pot experiment during six weeks. P-fertilizer potential, effect on soil pH and the effect on heavy metal levels in the leachate is measured.
Commercial fertilizer as well as municipal sewage and wood ash were tested parallel to the filter material for comparison. The results show that Filtra P and Polonite had no significant effect on the pH of the compost. Both material increases the amount of P in the compost but the method of analysis of plant-available phosphorus was misleading since it showed calciumbound fractions that most likely were not readily available for the plant. While treatment of the easily available calciumphosphate showed a significant increase in growth of wheat grown in the compost, there was no increase in growth in the treatments with Filtra P or Polonite. No effect on levels of heavy metals in the leachate could be seen for any of the treatments (Filtra P, Polonite, municipal sewage or woodash.},
  author       = {Thynell, Anna},
  language     = {swe},
  note         = {Student Paper},
  title        = {Hållbar hantering av uttjänt filtermaterial från fosforfällor - Gödseleffekt och miljöpåverkan},
  year         = {2011},
}