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Bramryd

Torleif Bramryd

Seniorprofessor

Bramryd

Irrigation of landfill leachates in energy forests - A technique to recover nutrients from municipal solid wastes

Författare

  • Lars Brander
  • Martin Dahl
  • Torleif Bramryd

Summary, in English

From an ecological point of view it is important to close nutrient cycles by recirculating mineral nutrients from the urban society back to agriculture and forestry, and thereby obtaining a sustainable resource utilisation. A part of this cycle is illustrated by irrigation of bioreactor landfill leachates on short rotation forests. This paper presents a budget for nutrients and heavy metals, beginning with the leachates and ending with the harvested tree fraction. The hypotheses were: The applied minerals deliver nutrients to the trees. The nutrient content in the accumulating biomass corresponds to the amount of mineral nutrients applied. The concentrations of heavy metals in the trees will remain low. The uptake of elements in birch was for P 35%, Ca 1.2%, Cd 64%, Cu 10%, Mn 19%, Ni 0.11%, and for Zn 26% of the supplied amounts. It was concluded that nutrients, with some exceptions, are supplied in sufficient amounts from the irrigated leachates to achieve optimal biomass growth, that the amounts of ions immobilised by the plants were significantly lower compared to the applied amounts, and that the concentrations of heavy metals are not increasing in the trees after irrigation. The overall conclusion is that a leachate irrigation system is efficient if the available vegetated land area is large enough for effective nutrient uptake, but the nutrient ratio may need to be balanced to meet the needs of the plants.

Avdelning/ar

  • Institutionen för service management och tjänstevetenskap

Publiceringsår

2004

Språk

Engelska

Sidor

213-224

Publikation/Tidskrift/Serie

Water, Air and Soil Pollution

Volym

154

Issue

1-4

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Social Sciences Interdisciplinary

Nyckelord

  • leachate
  • nutrient
  • landfill
  • irrigation
  • heavy metal
  • Betula
  • birch

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1573-2932