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|Title:||Microbial conversion of oily wastes to methane: effect of ferric nanomaterials|
|Author(s):||Martins, V. A.|
Carvalho, Ana Rita Castro
Alves, M. M.
Cavaleiro, A. J.
Soares, O. S. G. P.
Pereira, M. F. R.
|Publisher:||Taylor & Francis|
|Citation:||Martins, V. A.; Martins, Gilberto; Castro, Rita; Pereira, Luciana; Alves, M. Madalena; Cavaleiro, Ana Júlia; Soares, O. S. G. P.; Pereira, M. F. R., Microbial conversion of oily wastes to methane: effect of ferric nanomaterials. In Vilarinho, C.; Castro, F.; Gonçalves, M.; Fernando, A.L., Wastes: Solutions, Treatments and Opportunities III (Selected Papers from the 5th International Conference Wastes 2019, September 4-6, 2019, Lisbon, Portugal), Leiden: Taylor & Francis Group, 2020. ISBN: 978-0367-25777-4, 339-345|
|Abstract(s):||Petroleum-based oily wastes are generated by the oil industry and can be treated/valorized by anaerobic microbial conversion to methane. However, this process is generallyslow.Conductivenanomaterialswerereportedtoacceleratetheinterspecieselectrontransfer in anaerobic communities and therefore their addition to anaerobic processes treating hydrocarbons may also be advantageous. In this work, two ferric nanomaterials (magnetite and carbon nanotubes impregnated with 2% iron) were tested in microcosms amended with hexadecane and 1-hexadecene. Assays were also made with palmitate, acetate and H2/CO2, which are intermediates of hydrocarbons biodegradation.With the exception of hexadecane, methane was produced at close-to-stoichiometric amounts for each of the substrates tested. Methane production rates were similar with and without the nanomaterials, possibly due to the inability of the microorganisms to receive/transfer electrons to the materials in this microbial community, suggesting that electron transfer occurred indirectly via soluble electron shuttles (e.g. hydrogen or formate).|
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