Biodegradation of chloro- and bromobenzoic acids: Effect of milieu conditions and microbial community analysis

Gaza, Sarah; Felgner, Annika; Otto, Johannes; Kushmaro, Ariel; Ben‐Dov, Eitan; Tiehm, Andreas

doi:10.1016/j.jhazmat.2015.01.025

Cited by 8 publications

(1 citation statement)

References 36 publications

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“…Sequences within Clade III originate predominately from wastewater treatment systems (11/13), of which EBPR-type systems 23−25 with acetate, propionate, or municipal wastewater as a primary carbon source were the most abundant. Other habitats included anaerobic digesters with carbon sources of municipal wastewater 26 and benzene, 27 Anammox reactors (unpublished), a flow-through column reactor, 28 vermiculture system, 29 deep groundwater (unpublished), and rhizosphere. 30 In contrast to other studies, Chlorobiales;SJA-28 Clade III type sequences were identified with high relative abundance (>25%) in this investigation and in a nitrate-reducing, anaerobic benzenedegrading culture amended with H 2 .…”

Section: Environmental Science and Technologymentioning

confidence: 99%

Community Assembly and Ecology of Activated Sludge under Photosynthetic Feast–Famine Conditions

Oyserman

Martirano

Wipperfurth

et al. 2017

Environ. Sci. Technol.

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Here, we demonstrate that photosynthetic oxygen production under light-dark and feast-famine cycles with no mechanical aeration and negligible oxygen diffusion is able to maintain phosphorus cycling activity associated with the enrichment of polyphosphate accumulating organisms (PAOs). We investigate the ecology of this novel system by conducting a time series analysis of prokaryotic and eukaryotic biodiversity using the V3-V4 and V4 regions of the 16S and 18S rRNA gene sequences, respectively. In the Eukaryotic community, the initial dominant alga observed was Desmodesmus. During operation, the algal community became a more diverse consortium of Desmodesmus, Parachlorella, Characiopodium, and Bacillariophytina. In the Prokaryotic community, there was an initial enrichment of the PAO Candidatus Accumulibacter phosphatis (Accumulibacter) Acc-SG2, and the dominant ammonia-oxidizing organism was Nitrosomonas oligotropha; however, these populations decreased in relative abundance, becoming dominated by Accumulibacter Acc-SG3 and Nitrosomonas ureae. Furthermore, functional guilds that were not abundant initially became enriched including the putative Cyanobacterial PAOs Obscuribacterales and Leptolyngbya and the H-oxidizing denitrifying autotroph Sulfuritalea. After a month of operation, the most-abundant prokaryote belonged to an uncharacterized clade of Chlorobi classified as Chlorobiales;SJA-28 Clade III, the first reported enrichment of this lineage. This experiment represents the first investigation into the ecological interactions and community assembly during photosynthetic feast-famine conditions. Our findings suggest that photosynthesis may provide sufficient oxygen to drive polyphosphate cycling.

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