Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.jece.2023.111074
Title (Primary) Labor division of electroactive and carbon degrading microorganisms in bioelectrochemical laminar flow reactors
Author Guo, Y.; Rosa, L.F.M.; Shan, Y.; Harnisch, F. ORCID logo ; Müller, S.
Source Titel Journal of Environmental Chemical Engineering
Year 2023
Department UMB
Volume 11
Issue 5
Page From art. 111074
Language englisch
Topic T7 Bioeconomy
Keywords Flow cytometry; Labor division; Laminar flow; Bioelectrochemical system; Cytometric diversity
Abstract The composition and functions of an anodic microbiome are key to both, successful wastewater treatment on the one and efficient current production on the other hand. How the microorganisms can effectively contribute to these different functions may depend on the type of substrate and the mode of cultivation. In laminar flow bioelectrochemical systems (BES) three different carbon sources with different degrees of complexity were studied, including acetate as benchmark substrate as well as defined wastewater (DW) and undefined wastewater (unDW) as further substrates. Off-line flow cytometry was used to perform a spatially-resolved analysis of the biofilms in the individual channels of the laminar flow BES. Along the nutrient gradients in the channels, biomass formation was heterogeneous with less biomass in downstream channels which was unfavorable for both, current production and carbon removal efficiency. The microbial compositions of reactors fed with unDW showed more similarities with reactors fed with acetate than with DW. Both, the cytometric α-diversity and intra-ß community diversity values followed a decreasing (in initial seven channels) and then increasing (downstream channels) overall trend, indicating a reduction in community complexity for all substrates and subsequently the restructuration of biofilm community. The division of labor between current production and substrate degradation was found to be independent of provided substrates, with some subcommunities performing dual functions as both electroactive microorganisms and carbon degraders. Yet, the degree and efficiency of division of labor, in terms of biomass formation as well as types of subcommunities, was depending on the substrates.
Persistent UFZ Identifier
Guo, Y., Rosa, L.F.M., Shan, Y., Harnisch, F., Müller, S. (2023):
Labor division of electroactive and carbon degrading microorganisms in bioelectrochemical laminar flow reactors
J. Environ. Chem. Eng. 11 (5), art. 111074 10.1016/j.jece.2023.111074