Journal of Material Cycles and Waste Management

, Volume 6, Issue 1, pp 35–40

Degradation of chlorinated dioxin in denitrifying activated sludge from leachate treatment plant of a landfill

  • Kunichika Nakamiya
  • Tohru Furuichi
  • Kazuei Ishii
  • Ikuo Souda
ORIGINAL ARTICLE

DOI: 10.1007/s10163-003-0103-9

Cite this article as:
Nakamiya, K., Furuichi, T., Ishii, K. et al. J Mater Cycles Waste Manag (2004) 6: 35. doi:10.1007/s10163-003-0103-9

Abstract

The degradation rate of dioxins added to the activated sludge from a leachate treatment plant of a landfill under denitrification conditions was estimated using six bioreactors. Over 99% of the added dioxins (600 ng) were degraded within 7 days. Furthermore, continuous cultivation was carried out for 1 month. The activated sludge degraded 600 ng of dioxins (that is, all of the added dioxins) placed in each reactor every 7 days, and this activity was maintained for 35 days. Under aerobic conditions with this sludge, the dioxins were not degraded in 7 days, but 90% of the 600 ng of dioxins was degraded in 35 days. The high level of activity observed in the present study may only occur under anaerobic conditions, especially under denitrifying conditions.

Key words

DenitrifyingLeachateDioxinActivated sludgeTreatment

Copyright information

© Springer-Verlag Tokyo 2004

Authors and Affiliations

  • Kunichika Nakamiya
    • 1
  • Tohru Furuichi
    • 2
  • Kazuei Ishii
    • 2
  • Ikuo Souda
    • 3
  1. 1.Project Group of Risk Assessment and Management for Endocrine Disruptor and dioxin-like compoundsNational Institute for Environmental StudiesTsukubaJapan
  2. 2.Division of Environment Resource EngineeringHokkaido UniversitySapporoJapan
  3. 3.Environmental Engineering DivisionKanagawa Prefecture Environmental Research CenterKanagawaJapan