Potential of food waste-derived volatile fatty acids as alternative carbon source for denitrifying moving bed biofilm reactors

Tugba Sapmaz*, Reza Manafi, Amir Mahboubi, Dag Lorick, Derya Y. Koseoglu-Imer, Mohammad J. Taherzadeh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number128046
JournalBioresource Technology
Volume364
DOIs
Publication statusPublished - Nov 2022

Bibliographical note

Publisher Copyright:
© 2022 The Author(s)

Funding

The authors would like to thank the Sweden's Innovation Agency, Swedish Research Council, and the University of Borås for their technical and financial support of this work. We also thank Lucica Enache and Ann Mattsson from Gryaab-Ryaverket WWTP, Gothenburg, for their kind technical and scientific support. The first author (T.S) is sponsored via PhD grant from Turkish Scientific and the Technical Research Council TUBITAK (2211-A Internal Graduate Scholarship Programme). The authors would like to thank the Sweden’s Innovation Agency, Swedish Research Council, and the University of Borås for their technical and financial support of this work. We also thank Lucica Enache and Ann Mattsson from Gryaab-Ryaverket WWTP, Gothenburg, for their kind technical and scientific support. The first author (T.S) is sponsored via PhD grant from Turkish Scientific and the Technical Research Council TUBITAK (2211-A Internal Graduate Scholarship Programme).

FundersFunder number
Gryaab-Ryaverket WWTP
Sweden's Innovation Agency
Technical Research Council TUBITAK
VINNOVA
Vetenskapsrådet
Högskolan i Borås

    Keywords

    • Denitrification
    • External carbon source
    • Food waste
    • Moving bed biofilm reactor
    • Volatile fatty acids

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