TY - JOUR
T1 - Potential of food waste-derived volatile fatty acids as alternative carbon source for denitrifying moving bed biofilm reactors
AU - Sapmaz, Tugba
AU - Manafi, Reza
AU - Mahboubi, Amir
AU - Lorick, Dag
AU - Koseoglu-Imer, Derya Y.
AU - Taherzadeh, Mohammad J.
N1 - Publisher Copyright:
© 2022 The Author(s)
PY - 2022/11
Y1 - 2022/11
N2 - Fossil-based materials such as methanol are frequently used in the denitrification process of advanced biological wastewater treatment as external carbon source. Volatile fatty acids (VFAs) produced by anaerobic digestion of food waste, are sustainable compounds with the potential to act as carbon sources for denitrification, reducing carbon footprint and material costs. In this study, the effectiveness of food waste-derived VFAs (AD-VFA) was investigated in the post-denitrification process in comparison with synthetic VFA and methanol as carbon sources. Acetic acid had the highest rate of disappearance among single tested VFAs with a denitrification rate of 0.44 g NOx-N removed/m2/day, indicating a preferential utilization pattern. While AD-VFA had a denitrification rate of 0.61 mg NOx-N removed/m2/day, sVFA had a rate of 0.57 mg NOx-N removed/m2/day, indicating that impurities in AD-VFA did not play substantial role in denitrification. AD-VFA proved to be promising carbon source alternative for denitrification in wastewater treatment plants.
AB - Fossil-based materials such as methanol are frequently used in the denitrification process of advanced biological wastewater treatment as external carbon source. Volatile fatty acids (VFAs) produced by anaerobic digestion of food waste, are sustainable compounds with the potential to act as carbon sources for denitrification, reducing carbon footprint and material costs. In this study, the effectiveness of food waste-derived VFAs (AD-VFA) was investigated in the post-denitrification process in comparison with synthetic VFA and methanol as carbon sources. Acetic acid had the highest rate of disappearance among single tested VFAs with a denitrification rate of 0.44 g NOx-N removed/m2/day, indicating a preferential utilization pattern. While AD-VFA had a denitrification rate of 0.61 mg NOx-N removed/m2/day, sVFA had a rate of 0.57 mg NOx-N removed/m2/day, indicating that impurities in AD-VFA did not play substantial role in denitrification. AD-VFA proved to be promising carbon source alternative for denitrification in wastewater treatment plants.
KW - Denitrification
KW - External carbon source
KW - Food waste
KW - Moving bed biofilm reactor
KW - Volatile fatty acids
UR - http://www.scopus.com/inward/record.url?scp=85139188709&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2022.128046
DO - 10.1016/j.biortech.2022.128046
M3 - Article
C2 - 36182012
AN - SCOPUS:85139188709
SN - 0960-8524
VL - 364
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 128046
ER -
