From sewage sludge and agri-food waste to VFA Individual acid production potential and up-scaling

From sewage sludge and agri-food waste to VFA : Individual acid production potential and up-scaling

Copyright © 2018 Elsevier Ltd. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Waste management (New York, N.Y.). - 1999. - 77(2018) vom: 21. Juli, Seite 203-212
1. Verfasser: Esteban-Gutiérrez, M (VerfasserIn)
Weitere Verfasser: Garcia-Aguirre, J, Irizar, I, Aymerich, E
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2018
Zugriff auf das übergeordnete Werk:Waste management (New York, N.Y.)
Schlagworte:Journal Article Acidogenic Agri-food waste Co-treatment Fermentation Pilot-scale VFA Fatty Acids, Volatile Sewage Waste Water
Beschreibung
Zusammenfassung:Copyright © 2018 Elsevier Ltd. All rights reserved.
Volatile fatty acid (VFA) production through anaerobic fermentation may constitute an innovative solution for organic waste management within the context of circular economy. In the present study, the evolution of individual VFA during laboratory-scale fermentation of sewage sludge (SS), winery wastewater (Www) and meat and bone meal (MBM) was assessed, focusing on the effect of pH (5.5 and 10) and temperature (35 and 55 °C). Up-scaling of the fermentation process was evaluated in batch operation. The latter showed that specific VFA could be produced, giving similar individual evolution to lab-scale testing. To be precise, acetic acid percentage ranged within 30-65% and increased up to 5900 mg O2 L-1 during SS fermentation at 55 °C and pH 9. In addition, 60% butyric acid was reached during Www acid fermentation at 55 °C, which corresponded to 6670 mg O2 L-1 concentration in the fermentation broth. Regarding valeric acid, over 20% proportion and 2700 mg O2 L-1 were reached in MBM acid fermentation at 35 °C. Finally, iso-valeric maximum level ranged within 15-17% in SS alkaline fermentation at 55 °C, which represented a concentration close to 2000 mg O2 L-1. Interestingly, co-fermentation of agri-food waste and SS at thermophilic temperature and alkaline pH, boosted the VFA concentration 1.7-2 fold, which suggests that anaerobic co-fermentation of substrates from different nature could give promising outcomes in full-scale operation
Beschreibung:Date Completed 13.08.2018
Date Revised 07.12.2022
published: Print-Electronic
Citation Status MEDLINE
ISSN:1879-2456
DOI:10.1016/j.wasman.2018.05.027