Journal ArticleDOI
Effect of hydraulic retention time (HRT) on the biodegradation of trichloroethylene wastewater and anaerobic bacterial community in the UASB reactor.
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TLDR
This study utilizes the unique merits of an 8-L laboratory upflow anaerobic sludge blanket (UASB) reactor for treating synthetic wastewater containing trichloroethylene (TCE) and found that a tremendous rise of TCE removal efficiency from HRT of 5 h to H RT of 10 h was found.Abstract:
This study utilizes the unique merits of an 8-L laboratory upflow anaerobic sludge blanket (UASB) reactor for treating synthetic wastewater containing trichloroethylene (TCE). The reactor was operated at different hydraulic retention times (HRT) of 25, 20, 15, 10, and 5 h. TCE removal efficiency decreased from 99 to 85 % when the HRT was lowered down from 25 to 5 h, as well as chemical oxygen demand (COD) removal efficiency (from 95 to 84.15 %). Using Illumina 16S rRNA gene MiSeq sequencing, we investigated the evolution of bacterial communities in the anaerobic sludge under five different conditions of HRT. In total, 106,387 effective sequences of the 16S rRNA gene were generated from 5 samples that widely represented the diversity of microbial community. Sequence analysis consisting of several novel taxonomic levels ranging from phyla to genera revealed the percentages of these bacterial groups in each sample under different HRTs. The differences found among the five samples indicated that HRT had effects on the structures of bacterial communities and the changes of bacterial communities associated with the effect of HRT on the performance of the reactor. Sequence analyses showed that Bacteroidetes and Firmicutes were the dominant phyla. It is notable that the class Dehalococcoidia was found in the samples at HRT of 5, 10, 20, and 25 h, respectively, in which there were some dechlorination strains. Moreover, a tremendous rise of TCE removal efficiency from HRT of 5 h to HRT of 10 h was found.read more
Citations
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Journal ArticleDOI
Dietary Sodium Butyrate Decreases Postweaning Diarrhea by Modulating Intestinal Permeability and Changing the Bacterial Communities in Weaned Piglets
TL;DR: An important role for SB is supported in improving performance and decreasing diarrhea incidence in weaned piglets by modulation of intestinal permeability and the bacterial communities in the ileum and colon.
Journal ArticleDOI
A review: Driving factors and regulation strategies of microbial community structure and dynamics in wastewater treatment systems
TL;DR: The effects and mechanisms of influent composition, process configuration, operating parameters and environmental condition to the change of microbial community structure and process performance (nitrification, denitrification, biological phosphorus removal, organics mineralization and utilization, etc.) are critically reviewed.
Journal ArticleDOI
The diversity, distribution and function of N-acyl-homoserine lactone (AHL) in industrial anaerobic granular sludge.
TL;DR: This study explored the AHL level in 10 full-scale industrial anaerobic granular bioreactors and detected a total of 4 kinds of AHLs, indicating C8-HSL and C10- HSL were indicated to be the potentially universal QS signal molecules in an aerobic granules and involved in extracellular polymeric substance (EPS) production and granulation process.
Journal ArticleDOI
Deep sequencing reveals microbiota dysbiosis of tongue coat in patients with liver carcinoma.
Haifeng Lu,Zhigang Ren,Ang Li,Hua Zhang,Jianwen Jiang,Shao-Yan Xu,Qixia Luo,Kai Zhou,Xiaoli Sun,Shusen Zheng,Lanjuan Li +10 more
TL;DR: The first time to investigate tongue coat microbiome of LC patients with cirrhosis based on 16S ribosomal RNA (rRNA) gene sequencing reveals significant microbial dysbiosis of tongue coats in LC patients.
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Bacteriophages as potential new mammalian pathogens
TL;DR: Novel insights are provided into the role of bacteriophages as potentially pathogenic for mammals and their possible implication in the development of diseases associated with increased intestinal permeability.
References
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Book
Standard methods for the examination of water and wastewater
TL;DR: The most widely read reference in the water industry, Water Industry Reference as discussed by the authors, is a comprehensive reference tool for water analysis methods that covers all aspects of USEPA-approved water analysis.
Journal ArticleDOI
Next-generation DNA sequencing.
Jay Shendure,Hanlee P. Ji +1 more
TL;DR: Next-generation DNA sequencing has the potential to dramatically accelerate biological and biomedical research, by enabling the comprehensive analysis of genomes, transcriptomes and interactomes to become inexpensive, routine and widespread, rather than requiring significant production-scale efforts.
Journal ArticleDOI
Pyrosequencing enumerates and contrasts soil microbial diversity
Luiz Fernando Wurdig Roesch,Roberta R. Fulthorpe,Alberto Riva,George Casella,Alison K M Hadwin,Angela D. Kent,Samira H. Daroub,Flávio Anastácio de Oliveira Camargo,William G. Farmerie,Eric W. Triplett +9 more
TL;DR: This work is the most comprehensive examination to date of bacterial diversity in soil and suggests that agricultural management of soil may significantly influence the diversity of bacteria and archaea.
Journal ArticleDOI
Isolation of a Bacterium That Reductively Dechlorinates Tetrachloroethene to Ethene
TL;DR: Growth of strain 195 was resistant to ampicillin and vancomycin; its cell wall did not react with a peptidoglycan-specific lectin and its ultrastructure resembled S-layers of Archaea.
Journal ArticleDOI
454 pyrosequencing reveals bacterial diversity of activated sludge from 14 sewage treatment plants.
Tong Zhang,Ming Fei Shao,Lin Ye +2 more
TL;DR: Pyrosequencing analyses of multiple AS samples in this study revealed the minority populations that are hard to be explored by traditional molecular methods and showed that a large proportion of sequences could not be assigned to taxonomic affiliations even at the phylum/class levels.
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