Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production
Two perturbations were investigated in acidogenic co-fermentation of waste activated sludge (WAS) and food waste in continuous mesophilic fermenters: increasing the organic loading rate (OLR) and changing the WAS. A control reactor maintained an OLR of 11 gVS/(L·d), while a test reactor had a prolon...
| Authors: | ; ; ; ; |
|---|---|
| Format: | Article |
| Status: | Accepted version |
| Publication date: | 2024 |
| Country: | España |
| Institution: | Universidad de Oviedo (UNIOVI) |
| Repository: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/225054 |
| Online Access: | https://hdl.handle.net/2445/225054 |
| Access Level: | Open access |
| Keyword: | Bioreactors Metabolisme microbià Microbial metabolism |
| _version_ | 1878731449799016448 |
|---|---|
| author | Perez-Esteban, N. |
| author2 | Vives-Egea, Júlia Dosta Parras, Joan Astals Garcia, Sergi Peces, Miriam |
| author2_role | author author author author |
| author_browse | Astals Garcia, Sergi Dosta Parras, Joan Peces, Miriam Perez-Esteban, N. Vives-Egea, Júlia |
| author_facet | Perez-Esteban, N. Vives-Egea, Júlia Dosta Parras, Joan Astals Garcia, Sergi Peces, Miriam |
| author_role | author |
| collection | Dipòsit Digital de la UB |
| description | Two perturbations were investigated in acidogenic co-fermentation of waste activated sludge (WAS) and food waste in continuous mesophilic fermenters: increasing the organic loading rate (OLR) and changing the WAS. A control reactor maintained an OLR of 11 gVS/(L·d), while a test reactor had a prolonged OLR change to 18 gVS/(L·d). For each OLR, two WAS were studied. The change in OLR led to differentiated fermentation product profile without compromising the fermentation yields (∼300 mgCOD/gVS). At 11 gVS/(L·d), the product profile was dominated by acetic, butyric, and propionic acids while at 18 gVS/(L·d) it shifted to acetic acid, ethanol, and caproic acid. Reverting the OLR also reverted the fermentation profile. The biomass immigration with the WAS changed the fermentation microbial structure and introduced acetic acid-consuming methanogens, which growth was only delayed by the OLR increase. Microbial monitoring and post-fermentation tests can be used for early detection of acetic acid-consuming events. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_2fd60fe3cd7e7cfc0b8d0b4ff05fc693 |
| institution | Universidad de Oviedo (UNIOVI) |
| instname_str | Universidad de Oviedo (UNIOVI) |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:diposit.ub.edu:2445/225054 |
| publishDate | 2024 |
| publishDateSort | 2024 |
| publisher | Elsevier B.V. |
| publisherStr | Elsevier B.V. |
| reponame_str | Dipòsit Digital de la UB |
| spelling | Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production Perez-Esteban, N. Vives-Egea, Júlia Dosta Parras, Joan Astals Garcia, Sergi Peces, Miriam Bioreactors Metabolisme microbià Microbial metabolism Two perturbations were investigated in acidogenic co-fermentation of waste activated sludge (WAS) and food waste in continuous mesophilic fermenters: increasing the organic loading rate (OLR) and changing the WAS. A control reactor maintained an OLR of 11 gVS/(L·d), while a test reactor had a prolonged OLR change to 18 gVS/(L·d). For each OLR, two WAS were studied. The change in OLR led to differentiated fermentation product profile without compromising the fermentation yields (∼300 mgCOD/gVS). At 11 gVS/(L·d), the product profile was dominated by acetic, butyric, and propionic acids while at 18 gVS/(L·d) it shifted to acetic acid, ethanol, and caproic acid. Reverting the OLR also reverted the fermentation profile. The biomass immigration with the WAS changed the fermentation microbial structure and introduced acetic acid-consuming methanogens, which growth was only delayed by the OLR increase. Microbial monitoring and post-fermentation tests can be used for early detection of acetic acid-consuming events. Elsevier B.V. https://hdl.handle.net/2445/225054 |
| spellingShingle | Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production Perez-Esteban, N. Bioreactors Metabolisme microbià Microbial metabolism |
| status_str | acceptedVersion |
| title | Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| title_full | Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| title_fullStr | Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| title_full_unstemmed | Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| title_short | Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| title_sort | Resilience towards organic load and activated sludge variations in co-fermentation for carboxylic acid production |
| topic | Bioreactors Metabolisme microbià Microbial metabolism |
| topic_facet | Bioreactors Metabolisme microbià Microbial metabolism |
| url | https://hdl.handle.net/2445/225054 |