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dc.contributor.authorBaek, Gahyun
dc.contributor.authorRossi, Ruggero
dc.contributor.authorSaikaly, Pascal
dc.contributor.authorLogan, Bruce E
dc.date.accessioned2021-05-27T12:24:36Z
dc.date.available2021-05-27T12:24:36Z
dc.date.issued2021-05-18
dc.date.submitted2021-04-13
dc.identifier.citationBaek, G., Rossi, R., Saikaly, P. E., & Logan, B. E. (2021). The impact of different types of high surface area brush fibers with different electrical conductivity and biocompatibility on the rates of methane generation in anaerobic digestion. Science of The Total Environment, 787, 147683. doi:10.1016/j.scitotenv.2021.147683
dc.identifier.issn0048-9697
dc.identifier.pmid34004541
dc.identifier.doi10.1016/j.scitotenv.2021.147683
dc.identifier.urihttp://hdl.handle.net/10754/669281
dc.description.abstractThe addition of electrically conductive materials may enhance anaerobic digestion (AD) efficiency by promoting direct interspecies electron transfer (DIET) between electroactive microorganisms, but an equivalent enhancement can also be achieved using non-conductive materials. Four high surface area brush materials were added to AD reactors: non-conductive horsehair (HB) and polyester (PB), and conductive carbon fiber (CB) and stainless steel (SB) brushes. Reactors with the polyester material showed lower methane production (68 ± 5 mL/g CODfed) than the other non-conductive material (horsehair) and the conductive (graphite or stainless steel) materials (83 ± 3 mL/g CODfed) (p < 0.05). This difference was due in part to the higher biomass concentrations using horsehair or carbon (135 ± 43 mg) than polyester or stainless steel or materials (26 ± 1 mg). A microbial community analysis indicated that the relative abundance of electroactive microorganisms was not directly related to enhanced AD performance. These results show that non-conductive materials such as horsehair can produce the same AD enhancement as conductive materials (carbon or stainless steel). However, if the material, such as polyester, does not have good biomass retention, it will not enhance methane production. Thus, electrical conductivity alone was not responsible for enhancing AD performance. Polyester, which has been frequently used as a non-conductive control material in DIET studies, should not be used for this purpose due to its poor biocompatibility as shown by low biomass retention in AD tests.
dc.description.sponsorshipThis research was funded by the Stan and Flora Kappe endowment and other funds through The Pennsylvania State University.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0048969721027546
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in The Science of the total environment. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in The Science of the total environment, [787, , (2021-05-18)] DOI: 10.1016/j.scitotenv.2021.147683 . © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleThe impact of different types of high surface area brush fibers with different electrical conductivity and biocompatibility on the rates of methane generation in anaerobic digestion.
dc.typeArticle
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.identifier.journalThe Science of the total environment
dc.rights.embargodate2023-05-15
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Civil and Environmental Engineering, The Pennsylvania State University, 231Q Sackett Building, University Park, PA 16802, USA
dc.identifier.volume787
dc.identifier.pages147683
kaust.personSaikaly, Pascal
dc.date.accepted2021-05-06
dc.identifier.eid2-s2.0-85105809678
refterms.dateFOA2021-05-31T05:28:18Z


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