<I>Thauera</I> spp., Another Prominent Denitrifying Bacteria in the Methanol-Fed Activated Sludge

Abstract

Using quantitative polymerase chain reaction techniques, we quantified three denitrifying genera Paracoccus, Thauera and Pseudomonas. Thauera spp. (3.

Ecological risks of personal care ingredients for subtropical benthic communities

“…The rarefaction analysis was conducted using Mothur v.1.21.1 to reveal the diversity indices including the Chao and Shannon diversity indices (Schloss PD et al, 2009). To detect the influence of wastewater discharge on benthic microbial community composition, the relative abundances of sewer infrastructure-associated bacterial genera (i.e., Acinetobacter, Arcobacter and Trichococcus) (VandeWalle et al, 2012;Newton et al, 2013), denitrifying genera (i.e., Comamonas, Hyphomicrobium, Paracocccus, Thauera and Zoogloea) that have been found in the activated sludge of WWTPs (Tsai et al, 2012;Wang et al, 2014), and potential bacterial pathogen sequences suggested by Ibekwe et al (2016) were analysed in the present study. To examine the dissimilarity of microbial community between sampling sites or seasons, a PCA was performed based on the OTU…”

“…Restoration activities, thus, are recommended to restore the ecosystem quality in these waterways. All these genera are have been reported in the active sludge (Juretschko et al, 2002;Tsai et al, 2012;Wang et al, 2014). Table S4.…”

“…This indicates that human activities (e.g., WWTP effluent discharges) strongly altered the microbial community composition directly or indirectly in the contaminated sites. For example, Paracocccus, Zoogloea and Thauera were prominent denitrifying genera in the activated sludge of WWTPs (Tsai et al, 2012;Wang et al, 2014), but they were observed at sites S6, S8 and S11 (Table S3). This is likely related to the WWTPs effluents and/or illegal wastewater discharging by the surrounding area.…”

“…In addition, there was an interactive effect of TCS and the presence of benthic macroinvertebrates on the microbial community composition in the sediment (Chapter 5 and 6). Denitrifiers have been found in the activated sludge of WWTPs (Tsai et al, 2012;Wang et al, 2014) and showed higher relative abundances in the samples from the central urban rivers than the Liuxi and the Zhujiang River (Chapter 3). This indicates that sites in the central urban rivers were affected by WWTPs effluence.…”