Author(s):
Braga, Cátia Sofia Macedo ; Martins, Gilberto ; Soares, O. Salomé G. P. ; Pereira, M. Fernando R. ; Pereira, Inês A. C. ; Pereira, Luciana ; Alves, M. M. ; Salvador, Andreia Filipa Ferreira
Date: 2024
Persistent ID: https://hdl.handle.net/1822/93032
Origin: RepositóriUM - Universidade do Minho
Project/scholarship:
info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FBTA-BTA%2F2249%2F2021/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04469%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50020%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50020%2F2020/PT;
info:eu-repo/grantAgreement/FCT/POR_NORTE/SFRH%2FBD%2F132003%2F2017/PT;
info:eu-repo/grantAgreement/FCT/POR_NORTE/COVID%2FBD%2F152431%2F2022/PT;
Subject(s): Methanogens; Lag phase; Methane production rates; Conductive materials; Non-conductive materials
Description
Supplementary data to this article can be found online at https://doi.org/10.1016/j.biortech.2024.131144.
Conductive materials (CM) enhance methanogenesis, but there is no clear correlation between conductivity and faster methane production (MP) rates. We investigated if MP by pure cultures of methanogens (Methanobacterium formicicum, Methanospirillum hungatei, Methanothrix harundinacea and Methanosarcina barkeri) is affected by CM (activated carbon (AC), magnetite), and other sustainable alternatives (sand and glass beads, without conductivity, and zeolites (Zeo)). The significant impact of the materials was on M. formicicum as MP was significantly accelerated by non-CM (e.g., sand reduced the lag phase (LP) duration by 48 %), Zeo and AC (LP reduction in 71% and 75 %, respectively). Conductivity was not correlated with LP reduction. Instead, silicon content in the materials was inversely correlated with the time required for complete MP, and silicon per se stimulated M. formicicums activity. These findings highlight the potential of using non-CM silicon-containing materials in anaerobic digesters to accelerate methanogenesis.
This study was supported by the Portuguese Foundation for Science and Technology (FCT) under the scope of the CM4Methane project (Ref: PTDC/BTA-BTA/2249/2021, DOI https://doi.org/10.54499/PTDC/BTA-BTA/2249/2021), the strategic funding of UIDB/04469/2020 unit, with DOI ttps://doi.org/10.54499/UIDB/04469/2020, and by LSRE-LCM, UIDB/50020/2020 (https://doi.org/10.54499/UIDB/50020/2020) and UIDP/50020/2020 (https://doi.org/10.54499/ UIDP/50020/2020). This research was also supported by BioEcoNorte project (NORTE-01-0145-FEDER-000070) funded by the European Regional Development Fund under the scope of Norte2020 – Programa Operacional Regional do Norte. Catia S. N. Braga held SFRH/BD/132003/2017 and COVID/BD/152431/2022 grants funded by FCT and European Union, through the Portuguese State Budget and the European Social Fund under the scope of Norte2020 – Programa Operacional Regional do Norte.
info:eu-repo/semantics/publishedVersion
