Nutrients and heavy metals distribution in thermally treated pig manure

Ksawery Kuligowski*, Tjalfe G. Poulsen, Peder Stoholm, Niels Pind, Jens Laursen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Ash from pig manure treated by combustion and thermal gasification was characterized and compared in terms of nutrient, i.e., potassium (K), phosphorus (P) and heavy metal, i.e., cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni) and zinc (Zn) contents. Total nutrient and metal concentrations were measured using energy dispersive X-ray fluorescence analysis. Acid (HNO3, H2SO4 ) and water-extractable concentrations were also measured both in non-classified ash and in selected ash particle size fractions using flame atomic absorption spectrometry and colorimetric spectrometry. Results indicate that ash from gasified manure contained more water-extractable K in comparison with combusted manure whereas the opposite was the case with respect to P. Heavy metals Ni, Cr and Cd were present in higher concentrations in the fine particle size fractions (<30 μm of particle diameter), whereas K, P, Zn and Cu exhibited higher concentrations in the coarser particle size fractions (>30 μm).

Original languageEnglish
Pages (from-to)347-354
Number of pages8
JournalWaste Management and Research
Volume26
Issue number4
DOIs
StatePublished - Aug 2008
Externally publishedYes

Keywords

  • Animal manure ash
  • Heavy metals
  • Incineration
  • Nutrients
  • Particle size distribution
  • Thermal gasification
  • wmr 1309-5

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