Enhancing struvite precipitation potential for ammonia nitrogen removal in municipal landfill leachate

Daekeun Kim, Hong Duck Ryu, Man Soo Kim, Jinhyeong Kim, Sang Ill Lee

Research output: Contribution to journalArticlepeer-review

181 Scopus citations

Abstract

This study was conducted to improve struvite precipitation for NH4-N removal purpose in landfill leachate. For this purpose, we evaluated the effect of the feeding sequence of precipitating reagents (magnesium, orthophosphate, and buffering reagent) on NH4-N removal by forming struvite deposits. Struvite precipitation effectively proceeded by an addition of excess magnesium and phosphate sources followed by an addition of the buffering reagent, in which condition the local formation of inappropriate deposits or the contamination of the desired struvite was minimized. We also tested the effect of struvite addition as the seeding materials on NH4-N removal. Seed addition would increase the potential for the struvite crystal growth, which enhanced NH4-N removal performance in landfill leachate treatment.

Original languageEnglish
Pages (from-to)81-85
Number of pages5
JournalJournal of Hazardous Materials
Volume146
Issue number1-2
DOIs
StatePublished - 19 Jul 2007

Keywords

  • Ammonia nitrogen
  • Landfill leachate
  • Precipitation
  • Struvite

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