Preliminary trials of in situ ammonia stripping from source segregated domestic food waste digestate using biogas: Effect of temperature and flow rate

M Ángeles De la Rubia, Mark Walker, Sonia Heaven, Charles J Banks, Rafael Borja

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Batch experiments to remove ammonia from food waste digestate were set up, and preliminary runs undertaken. These experiments were based on gas stripping in a heated column reactor; the effects of different temperatures (35, 55 and 70 °C) and gas flow rates (0.125, 0.250 and 0.375 min−1) were considered using biogas as the stripping gas. At 35 °C, an increase in the ammonia removal rate by approximately 4.5 times was observed when the flow rate increased from 0.125 to 0.375 min−1. At 55 °C, and flow rates of 0.250 and 0.375 min−1, ammonia removal of 3.46 and 9.38% day−1, respectively, were achieved. The highest values of removal of ammonia were reached at 70 °C: 18.4 and 10.4% day−1, for 0.250 and 0.375 min−1 flow rates, respectively.
Original languageEnglish
Pages (from-to)9486-9492
Number of pages7
JournalBioresource Technology
Volume101
Issue number24
Early online date29 Jul 2010
DOIs
Publication statusPublished - Dec 2010

Keywords

  • Ammonia removal
  • Anaerobic digestion
  • Food waste
  • Stripping

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