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

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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
Issue number24
Early online date29 Jul 2010
Publication statusPublished - Dec 2010



  • Ammonia removal
  • Anaerobic digestion
  • Food waste
  • Stripping

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