Comparative effect of conductive and dielectric materials on methanogenesis from highly concentrated volatile fatty acids

Shekhurdina, S.V.; Zhuravleva, E.A.; Kovalev, A.A.; Andreev, E.A.; Kryukov, E.; Loiko, N.G.; Laikova, A.; Popova, N.M.; Kovalev, D.A.; Vivekanand, V.; Litti, Y.V.

Авторы: Shekhurdina Svetlana V., Zhuravleva Elena A., Kovalev Andrey A., Andreev Egor A., Kryukov Emil, Loiko Natalia G., Laikova Aleksandra, Popova Nadezhda M., Kovalev Dmitriy A., Vivekanand Vivekanand, Litti Yuriy V.
Журнал: Bioresource Technology
Том: 377
Год издания: 2023
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 128966
DOI: 10.1016/j.biortech.2023.128966
Аннотация: Various conductive materials and their dielectric counterparts were used to get deeper insights into contribution of direct interspecies electron transfer (DIET) in improving methanogenesis from highly concentrated volatile fatty acids (12.5 g/L). Potential CH4 yield, maximum CH4 production rate and lag phase were significantly (up to 1.4, 3.9 and 2.0 times, respectively) improved with addition of stainless-steel mesh (SM) and carbon felt (CF) compared to both control and dielectric counterparts (p < 0.05). kapp increased by 82% for SM and 63% for CF compared to control (p < 0.05). Short thick pili-like structures up to 150 nm in width were formed only in CF and SM biofilms, however, were more abundant for SM. Ureibacillus and Limnochordia specific for SM biofilms, and Coprothermobacter and Ca. Caldatribacterium for CF biofilms, were considered electrogenic. Promotion of DIET by conductive materials is governed by many factors, including specificity of electrogenic groups to material surface.
Добавил в систему: Андреев Егор Андреевич

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