Enhanced anaerobic biodegradation efficiency and mechanism of quinoline, pyridine, and indole in coal gasification wastewater

Shi, Jingxin; Xu, Chunjian; Han, Yuxing; Han, Hongjun

doi:10.1016/j.cej.2018.12.162

Cited by 83 publications

(16 citation statements)

References 46 publications

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“…Based on this study and those by others, the previously neglected habitats with an astonishing diversity of myxobacteria appear to promising reservoirs for obtaining yet-to-be-cultured bacteria. On the other hand, our study clearly indicates that isolation efforts under anaerobic conditions may be a more effective alternative for obtaining myxobacteria [55]. The characterization and description of the species Anaeromyxobacter dehalogenans as the first facultative anaerobic myxobacteria has proven the feasibility of anaerobic cultivation approaches [13].…”

Section: Discussionmentioning

confidence: 96%

Meta-16S rRNA Gene Phylogenetic Reconstruction Reveals the Astonishing Diversity of Cosmopolitan Myxobacteria

2019

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Numerous ecological studies on myxobacteria have been conducted, but their true diversity remains largely unknown. To bridge this gap, we implemented a comprehensive survey of diversity and distribution of myxobacteria by using 4997 publicly available 16S rRNA gene sequences (≥1200 bp) collected from several hundred sites across multiple countries and regions. In this study, the meta-16S rRNA gene phylogenetic reconstruction clearly revealed that these sequences could be classified into 998 species, 445 genera, 58 families, and 20 suborders, the great majority of which belonged to new taxa. Most cultured myxobacteria were strongly inclined to locate on the shallow branches of the phylogenetic tree; on the contrary, the majority of uncultured myxobacteria located on the deep branches. The geographical analysis of sequences based on their environmental categories clearly demonstrated that myxobacteria show a nearly cosmopolitan distribution, despite the presence of some habitat-specific taxa, especially at the genus and species levels. Among the abundant suborders, Suborder_4, Suborder_15, and Suborder_17 were more widely distributed in marine environments, while the remaining suborders preferred to reside in terrestrial ecosystems. In conclusion, this study profiles a clear framework of diversity and distribution of cosmopolitan myxobacteria and sheds light on the isolation of uncultured myxobacteria.

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Section: Discussionmentioning

confidence: 96%

Meta-16S rRNA Gene Phylogenetic Reconstruction Reveals the Astonishing Diversity of Cosmopolitan Myxobacteria

2019

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“…Based on this study and those by others, the previously neglected habitats with an astonishing diversity of myxobacteria are promising reservoirs for getting yet-to-be-cultured bacteria. On the other hand, our study clearly indicates that isolation efforts under anaerobic conditions may be a more effective alternative for obtaining myxobacteria (43). The characterization and description of the species Anaeromyxobacter dehalogenans as the first facultative anaerobic myxobacteria have proven the feasibility of anaerobic cultivation approaches (13).…”

Section: Discussionmentioning

confidence: 69%

Meta-16S rRNA gene phylogenetic reconstruction reveals astonishing diversity of the cosmopolitan myxobacteria

Liu

Yao

Zhu

2019

Preprint

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23Numerous ecological studies for myxobacteria have been conducted well, but their 24 true diversity hidden in plain sight remains to be explored. To bridge this gap, we here 25 implemented a comprehensive survey of diversity and distribution of myxobacteria by 26 using 4997 publicly available 16S rRNA gene sequences (≥1200 bp) collected from 27 several hundreds of sites across multiple countries and regions. In the study, the 28 meta-16S rRNA gene phylogenetic reconstruction clearly revealed that these 29 sequences were classified to 998 species, 445 genera, 58 families, and 20 suborders, 30 highlighting a considerable taxonomic diversity of myxobacteria, the great majority of 31 which belonged to new taxa. Most cultured myxobacteria including the 32 well-described type strains were strongly inclined to locate on the shallow branches of 33 the phylogenetic tree; on the contrary, the majority of uncultured myxobacteria the 34 deep branches. The geographical analysis of sequences based on their environmental 35 categories clearly demonstrated that myxobacteria showed a nearly cosmopolitan 36 distribution, despite the presence of some habitat-specific taxa, especially at genus 37 and species levels. Among all abundant suborders, members of Suborder_4, 38 Suborder_15, and Suborder_17 were more widely distributed in marine environments, 39 the remaining suborders preferred to reside in terrestrial ecosystems, particularly in 40 soils, indicating a potential selectivity of geographical distribution. In conclusion, this 41 study profiles a clear framework of diversity and distribution of the cosmopolitan 42 myxobacteria and sheds light on the isolation of the uncultured myxobacteria. 43 44 48thousands of publicly available and high-quality 16S rRNA gene sequences of 49 myxobacteria by using the phylogenetic reconstruction. The study presented an 50 astonishing diversity than that expected from the previous studies. This study further 51 demonstrated that the culturability of myxobacteria was perfectly comparable to its 52 phylogeny in the phylogenetic tree. The geographical analysis clearly indicated that 53 myxobacteria showed a nearly cosmopolitan distribution, while some taxa exhibited 54 obvious preferences for specific environmental conditions. Together, our study 55 provides novel insights into the diversity, distributions, and ecological preferences of 56 of myxobacteria from diverse environments and lays the foundation for innovation of 57 isolation techniques and the discovery of new secondary metabolites. 58 59 KRYWORDS: myxobacteria; phylogenetic diversity; geographical distribution; 60 environments 61 62 63 64 65 66 67 Myxobacteria are a large group of organisms, which taxonomically belong to the 68 order Myxococcales within the class Deltaproteobacteria (1). They are one of nature's 69 "endowed" and extensively dispersed in natural environments, preferentially in places 70 that are rich in microbes and organic matter. Myxobacteria are one of the fascinating 71 and unique bacteria by virtue of thei...

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“…During phase I, the other three abundant genera in E0, Gemmobacter , Flavobacterium, and Terrimonas , decreased from 7.68%, 5.94%, and 5.78%, respectively, to less than 1% in R1 to R4. Among these genera, Gemmobacter assists with denitrification, Flavobacterium with the removal of organic matter and ammonia nitrogen (Zhao et al, 2018) and Terrimonas with the removal of polycyclic aromatic hydrocarbons (PAHs) (Shi et al, 2019). This decrease may be related to the IC system.…”

Section: Resultsmentioning

confidence: 99%

Effect of carrier particle size on enrichment and shift in nitrifier community behaviors for treating increased strength wastewater

Liu

Zhao

et al. 2021

Water Environment Research

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In activated sludge systems, adding carriers can improve nitrifier enrichment. Different attachment area induced by different particle sizes of carriers may result in different nitrifier community. This research investigated the effect of different particle sizes of coal ash on nitrifier enrichment treating increased strength wastewater. Results indicated efficient nitrifying coal ash was obtained with smaller coal ash. The ammonia removal rates reached over 98%, which outclassed that in negative control (63.28%), and no nitrite accumulated in these systems under high nitrogen concentration of 1123.35 mg N/L. The high‐throughput sequencing assays indicated carriers changed the microbial community structure significantly, thus facilitated the nitrification capacity. Increase abundance of nitrifier has a negative correlation with particle size of carriers. Nitrosomonas became the biggest beneficiary, which maximum composed 50.29% in fillers system and only 13.69% in negative control, whereas the number of Nitrobacter (less than 3.04%) became much lower than ammonia‐oxidizing bacteria (AOB). However, the shift of microbial structures, large number of Dokdonella for instance, may guarantee the complete nitrification in systems with smaller carriers. Batch experiments showed a high dissolved oxygen (DO) concentration (4 mg/L) and slightly alkaline condition (pH 8.0) had a positive effect on nitrifying coal ash. Practitioner points The increase size of nitrifier has a negative correlation with particle size of coal ash. The smaller coal ash reduces the adverse effect of high nitrogen on nitrification. The ammonia removal rate reached 99.82% with influent of 1123.35 mg NH4+0.333333em- N/L in the smallest carriers system.

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Enhanced anaerobic biodegradation efficiency and mechanism of quinoline, pyridine, and indole in coal gasification wastewater

Cited by 83 publications

References 46 publications

Meta-16S rRNA Gene Phylogenetic Reconstruction Reveals the Astonishing Diversity of Cosmopolitan Myxobacteria

Meta-16S rRNA Gene Phylogenetic Reconstruction Reveals the Astonishing Diversity of Cosmopolitan Myxobacteria

Meta-16S rRNA gene phylogenetic reconstruction reveals astonishing diversity of the cosmopolitan myxobacteria

Effect of carrier particle size on enrichment and shift in nitrifier community behaviors for treating increased strength wastewater

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