Comparison of Untreated, Lime-Stabilised and Composted Wastewater Sludges from a Pulp, Board and Paper Mill Integrate as a Fertiliser Product

Juha Oksanen*, Risto Pöykiö, Olli Dahl

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

9 Downloads (Pure)

Abstract

In this study, the physical and chemical properties of untreated, lime-stabilised and composted wastewater sludges from a Finnish pulp, board and paper mill integrate were compared in order to assess their fertiliser properties based on the requirement of the Finnish Fertilizer Product Decree. Furthermore, the extraction properties of heavy metals in the sludges were assessed by the three-stage sequential extraction procedure of the Community Bureau of Reference (BCR) and the solubility indices for heavy metals were calculated in order to evaluate the release potential of elements from the sample (sludge) matrix. The results of this study indicated that the total heavy metal (As, Cd, Cr, Cu, Hg, Ni, Pb and Zn) concentrations in all sludges were lower than the statutory Finnish limit values for fertiliser products. However, the untreated sludge required either lime-stabilisation or composting in order to fulfil the Finnish maximum concentrations of pathogens (coliforms and Escherichia coli) for fertiliser products.

Original languageEnglish
Pages (from-to)47-58
Number of pages12
JournalJournal of Ecological Engineering
Volume22
Issue number5
DOIs
Publication statusPublished - 1 May 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • BCR sequential extraction
  • fertiliser
  • forest industry
  • pulp and paper mill sludge

Fingerprint

Dive into the research topics of 'Comparison of Untreated, Lime-Stabilised and Composted Wastewater Sludges from a Pulp, Board and Paper Mill Integrate as a Fertiliser Product'. Together they form a unique fingerprint.

Cite this