Thermal drying of the solid fraction from biogas digestate: effects of acidification, temperature and ventilation on nitrogen content
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Thermal drying of the solid fraction from biogas digestate : effects of acidification, temperature and ventilation on nitrogen content. / Pantelopoulos, Athanasios; Magid, Jakob; Jensen, Lars Stoumann.
In: Waste Management, Vol. 48, 2016, p. 218-226.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Thermal drying of the solid fraction from biogas digestate
T2 - effects of acidification, temperature and ventilation on nitrogen content
AU - Pantelopoulos, Athanasios
AU - Magid, Jakob
AU - Jensen, Lars Stoumann
N1 - Copyright © 2015 Elsevier Ltd. All rights reserved.
PY - 2016
Y1 - 2016
N2 - Drying of solids produced from digestate is prone to N losses through NH3 volatilisation. The applicability of acidification as an NH3 emission mitigation technique during the drying of solids from digestate was assessed in a drying experiment. Operating conditions comprised four drying temperatures (70-160°C), two air ventilation rates (natural, 420ml/min) and three pH levels (9.2, 6.5 and 5.5) of the solids, modified by the addition of concentrated sulphuric acid. Acidification of the solids from digestate significantly decreased the NH3 emission during drying, irrespective of the drying conditions. A parallel decrease in the organic nitrogen content and an increase in the ammonium content of the solids was observed after acidification of the solids. It was confirmed that acidification before thermal concentration of solids from digestate, minimised NH3 losses under a wide range of drying conditions.
AB - Drying of solids produced from digestate is prone to N losses through NH3 volatilisation. The applicability of acidification as an NH3 emission mitigation technique during the drying of solids from digestate was assessed in a drying experiment. Operating conditions comprised four drying temperatures (70-160°C), two air ventilation rates (natural, 420ml/min) and three pH levels (9.2, 6.5 and 5.5) of the solids, modified by the addition of concentrated sulphuric acid. Acidification of the solids from digestate significantly decreased the NH3 emission during drying, irrespective of the drying conditions. A parallel decrease in the organic nitrogen content and an increase in the ammonium content of the solids was observed after acidification of the solids. It was confirmed that acidification before thermal concentration of solids from digestate, minimised NH3 losses under a wide range of drying conditions.
KW - Ammonia
KW - Biofuels
KW - Hydrogen-Ion Concentration
KW - Hydrolysis
KW - Nitrogen
KW - Refuse Disposal
KW - Solid Waste
KW - Temperature
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
U2 - 10.1016/j.wasman.2015.10.008
DO - 10.1016/j.wasman.2015.10.008
M3 - Journal article
C2 - 26481635
VL - 48
SP - 218
EP - 226
JO - Waste Management
JF - Waste Management
SN - 0956-053X
ER -
ID: 169105028