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

AuthorsRubia, M. Ángeles de la ; Borja Padilla, Rafael ; Walker, Mark; Heaven, Sonia; Banks, Charles J.
KeywordsAmmonia removal
Anaerobic digestion
Food waste
Issue DateDec-2010
CitationBioresource Technology 101(24): 9486-9492 (2010)
AbstractBatch 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 Lbiogas L-1 digestate min−1. At 55 °C, and flow rates of 0.250 and 0.375 Lbiogas L-1 digestate 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 Lbiogas L-1 digestate min−1 flow rates, respectively.
Description7 páginas, 4 figuras, 3 tablas.-- et al.
Publisher version (URL)http://dx.doi.org/10.1016/j.biortech.2010.07.096
Appears in Collections:(IG) Artículos
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