TY - JOUR
T1 - Volatile fatty acids production from biowaste at mechanical-biological treatment plants
T2 - Focusing on fermentation temperature
AU - Fernández-Domínguez, David
AU - Astals, Sergi
AU - Peces, Miriam
AU - Frison, Nicola
AU - Bolzonella, David
AU - Mata-Alvarez, Joan
AU - Dosta, Joan
N1 - Funding Information:
This research was supported by the RES URBIS project from the European Union’s Horizon 2020 research and innovation program (Grant Agreement no. 730349 ) and by the Spanish Ministerio de Economia y Competitividad ( CTM2016-76275-R ). Sergi Astals is thankful to the Spanish Ministry of Science, Innovation and Universities for his Ramon y Cajal fellowship (RYC-2017-22372). The authors also wish to thank Manuel E. Fernández for supporting this research.
Funding Information:
This research was supported by the RES URBIS project from the European Union's Horizon 2020 research and innovation program (Grant Agreement no. 730349) and by the Spanish Ministerio de Economia y Competitividad (CTM2016-76275-R). Sergi Astals is thankful to the Spanish Ministry of Science, Innovation and Universities for his Ramon y Cajal fellowship (RYC-2017-22372). The authors also wish to thank Manuel E. Fern?ndez for supporting this research.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/10
Y1 - 2020/10
N2 - The impact of temperature (20, 35, 45, 55, 70 °C) on volatile fatty acid (VFA) production from biowaste collected at a mechanical–biological treatment plant was analysed. Additionally, relevant streams of the treatment plant were characterised to assess seasonality effects and conceive the integration of a fermentation unit. Batch fermentation tests at 35 °C showed the highest VFA yields (0.49–0.59 gCODVFA/gVS). The VFA yield at 35 °C was 2%, 6%, 10% and 14% higher than at 55, 45, 20 and 70 °C, respectively. The VFA profile was not affected by the fermentation temperature nor seasonality and was dominated by acetic, propionic and butyric acid (75–86% CODVFA). The concentration of non-VFA soluble COD and ammoniacal nitrogen in the fermentation liquor increased with temperature. The fermentation unit in the treatment plant was conceived after the pulper and hydrocyclones and before the anaerobic digester, while the fermenter temperature depends on the VFA application.
AB - The impact of temperature (20, 35, 45, 55, 70 °C) on volatile fatty acid (VFA) production from biowaste collected at a mechanical–biological treatment plant was analysed. Additionally, relevant streams of the treatment plant were characterised to assess seasonality effects and conceive the integration of a fermentation unit. Batch fermentation tests at 35 °C showed the highest VFA yields (0.49–0.59 gCODVFA/gVS). The VFA yield at 35 °C was 2%, 6%, 10% and 14% higher than at 55, 45, 20 and 70 °C, respectively. The VFA profile was not affected by the fermentation temperature nor seasonality and was dominated by acetic, propionic and butyric acid (75–86% CODVFA). The concentration of non-VFA soluble COD and ammoniacal nitrogen in the fermentation liquor increased with temperature. The fermentation unit in the treatment plant was conceived after the pulper and hydrocyclones and before the anaerobic digester, while the fermenter temperature depends on the VFA application.
KW - Food waste
KW - Mechanical-biological treatment (MBT) plant
KW - Mixed-culture fermentation
KW - Organic fraction of municipal solid waste (OFMSW)
KW - Short-chain fatty acids
UR - http://www.scopus.com/inward/record.url?scp=85087118457&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2020.123729
DO - 10.1016/j.biortech.2020.123729
M3 - Journal article
C2 - 32622279
AN - SCOPUS:85087118457
SN - 0960-8524
VL - 314
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 123729
ER -