scholarly journals Effect of different types of industrial wastewater on the bacterial community of urban rivers

2021 ◽  
pp. 31-48
Author(s):  
Lei Zhang ◽  
Yi Zhou ◽  
Yu Cheng ◽  
Wenxuan Lu ◽  
Yangyang Liang
Keyword(s):  
Bacterial Community ◽  
Industrial Wastewater ◽  
Urban Rivers ◽  
Different Types

Assessment of viral assemblages in different types of wetland water in northeast China using RAPD-PCR

2020 ◽  
Vol 85 ◽  
pp. 183-196
Author(s):  
Y Sun ◽  
J Liu ◽  
Q Yao ◽  
J Jin ◽  
X Liu ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Water Samples ◽  
Northeast China ◽  
Bacterial Community Composition ◽  
Freshwater Wetlands ◽  
Viral Community ◽  
Rapd Pcr ◽  
Wetland Water ◽  
Different Types ◽  
Viral Communities

Viruses are the most abundant and ubiquitous biological entities in various ecosystems, yet few investigations of viral communities in wetlands have been performed. To address this data gap, water samples from 6 wetlands were randomly collected across northeast China; viruses in the water were concentrated by sequential tangential flow filtration, and viral communities were assessed through randomly amplified polymorphic DNA-PCR (RAPD-PCR) with 4 decamer oligonucleotide primers. Principal coordinate analysis and hierarchical clustering analysis of the DNA fingerprints showed that viral community compositions differed among the water samples: communities in the 2 coastal wetlands were more similar to each other than to those in the 4 freshwater wetlands. The Shannon-Weaver index (H) and evenness index (E) of the RAPD-PCR fingerprint also differed among the 6 wetlands. Mantel test revealed that the changes in viral communities in wetland water were most closely related to the water NH4+-N and inorganic C content, followed by total K, P, C and NO3--N. DNA sequence analysis of the excised bands revealed that viruses accounted for ~40% of all sequences. Among the hit viral homologs, the majority belonged to the Microviridae. Moreover, variance partitioning analysis showed that the viral community contributed 24.58% while environmental factors explained 30.56% of the bacterial community variation, indicating that the bacterial community composition was strongly affected by both viral community and water variables. This work provides an initial outline of the viral communities from different types of wetlands in northeast China and improves our understanding of the viral diversity in these ecosystems.

scholarly journals Comparison of viromes in vaginal secretion from pregnant women with and without vaginitis

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
He-Teng Zhang ◽  
Hao Wang ◽  
Hai-Sheng Wu ◽  
Jian Zeng ◽  
Yan Yang
Keyword(s):  
Human Papillomavirus ◽  
Bacterial Community ◽  
Pregnant Women ◽  
Sequence Comparison ◽  
Pairwise Sequence Comparison ◽  
Vaginal Secretion ◽  
The Family ◽  
Complete Genomes ◽  
Different Types ◽  
Vaginal Tract

Abstract Background Although some studies have investigated the bacterial community in vaginal tract of pregnant women, there are few reports about the viral community (virome) in this type of microenvironment. Methods To investigate the composition of virome in vaginal secretion samples, 40 vaginal secretion samples from pregnant women with vaginitis and 20 vaginal secretion samples from pregnant women without vaginitis, pooled into 4 and 2 sample pools, respectively, were subjected to viral metagenomic analysis. Results Results indicated virus sequences showing similarity to human papillomavirus (HPV), anellovirus, and norovirus were recovered from this cohort of pregnant women. Further analysis indicated that 15 different defined types and one unclassified type of HPV were detected from pregnant women with vaginitis while only 3 defined types of HPV were detected in pregnant women without vaginitis. Five different groups of viruses from the family Anelloviridae were present in pregnant women with but none of them were detected in pregnant women without vaginitis. Norovirus was detected in 3 out of the 4 sample pools from pregnant women with vaginitis but none in the pregnant women without vaginitis. Twelve complete genomes belonging to 10 different types of HPV, and 5 novel anllovirus genomes belonging 2 different genera in Anelloviridae were acquired from these libraries, based on which phylogenetical analysis and pairwise sequence comparison were performed. Phageome in these samples was also briefly characterized and compared between two groups. Conclusion Our data suggested that virome might play an important role in the progression of vaginitis in pregnant women.

scholarly journals Characterization of bacterial community and flavor differences of different types of Douchi

2021 ◽  
Author(s):  
Yurong Wang ◽  
Fanshu Xiang ◽  
Zhendong Zhang ◽  
Qiangchuan Hou ◽  
Zhuang Guo
Keyword(s):  
Bacterial Community ◽  
Different Types

Molecular analysis of halophilic bacterial community for high-rate denitrification of saline industrial wastewater

2005 ◽  
Vol 72 (1) ◽  
pp. 182-189 ◽  
Author(s):  
Sachiko Yoshie ◽  
Hiroshi Makino ◽  
Hidenobu Hirosawa ◽  
Kosuke Shirotani ◽  
Satoshi Tsuneda ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Molecular Analysis ◽  
Industrial Wastewater ◽  
High Rate

scholarly journals Bacterial Community Shifts Driven by Nitrogen Pollution in River Sediments of a Highly Urbanized City

2019 ◽  
Vol 16 (20) ◽  
pp. 3794 ◽  
Author(s):  
Xianbiao Lin ◽  
Dengzhou Gao ◽  
Kaijun Lu ◽  
Xiaofei Li
Keyword(s):  
Bacterial Community ◽  
River Sediments ◽  
Nitrogen Pollution ◽  
Urban River ◽  
Urban Rivers ◽  
Negative Effects ◽  
Rapid Urbanization ◽  
Community Shifts ◽  
Bacterial Richness ◽  
Relative Abundances

Effects of nitrogen pollution on bacterial community shifts in river sediments remain barely understood. Here, we investigated the bacterial communities in sediments of urban and suburban rivers in a highly urbanized city, Shanghai. Sediment nitrate (NO3−) and ammonia (NH4+) were highly accumulated in urban river. Operation Taxonomic Units (OTUs), Abundance-based Coverage Estimators (ACEs) and Chao 1 estimator in urban rivers were slightly lower than those in suburban rivers, while Shannon and Simpson indices were higher in urban rivers than those in suburban rivers. Proteobacteria, Firmicutes, and Bacteroidetes were the dominant bacterial phylum communities, accounting for 68.5–84.9% of all communities. In particular, the relative abundances of Firmicutes and Nitrospirae were significantly higher in suburban rivers than in urban rivers, while relative abundances of Bacteroidetes, Verrucomicrobia, and Spirochaetes were significantly lower in suburban rivers than in urban rivers. NH4+ was significantly and negatively correlated with abundances of Firmicutes, Nitrospirae, and Actinobacteria. Importantly, the significant and negative effects of sediment NH4+ on bacterial richness and diversity suggested that nitrogen pollution likely contribute to the decrease in the bacterial richness and diversity. The results highlight that nitrogen enrichment could drive the shifts of bacterial abundance and diversity in the urban river sediments where are strongly influenced by human activities under the rapid urbanization stress.

scholarly journals A Review on Color Removal from Industrial Wastewater using Different Types of Coagulants

2019 ◽  
Vol 14 (4) ◽  
pp. 7329-7339
Author(s):  
Geraldine Chan Sue Ching ◽  
Daphne Lemoi Ak Tawan ◽  
Viviana Elliem Ak Harry ◽  
Kwok Feng Chong
Keyword(s):  
Industrial Wastewater ◽  
Color Removal ◽  
Different Types

scholarly journals Evaluation of Baffle Fixes Film up Flow Sludge Blanket Filtration (BFUSBF) System in Treatment of Wastewaters from Phenol and 2,4-Dinitrophenol Using Daphnia Magna Bioassay

2016 ◽  
Vol 10 (2) ◽  
pp. 7-11
Author(s):  
Mohammad Javad Ghannadzadeh ◽  
◽  
Ahmad Jonidi Jafari ◽  
Abbas Rezaee ◽  
Fatemeh Eftekharian ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Acute Toxicity ◽  
Daphnia Magna ◽  
Toxicity Test ◽  
Industrial Wastewater ◽  
Acute Toxicity Test ◽  
Toxic Unit ◽  
Appropriate Treatment ◽  
Different Types ◽  
As Toxicity

Background: Phenol and nitrophenol are common compounds found in different types of industrial wastewater known as serious threats to human health and natural environment. In this study, Daphnia magna was used to evaluate the effectiveness of "baffle fixes film up flow sludge blanket filtration" (BFUSBF) system in elimination of phenolic compounds from water. Methods: D. magna cultures were used as toxicity index of phenol and 2,4-DNP mixtures after treatment by a pilot BFUSBF system which consisted of baffle in anoxic section and biofilm in aerobic sections. Initial concentrations were 312 mg/L phenol and 288 mg/L 2,4-dinitrophenol (2,4-DNP). Results: Bioassay tests showed that D. magna was influenced by the toxicity of phenol and 2,4 DNP mixtures. The comparison between the toxicity of initial phenol and 2,4-DNP mixtures and the output toxic unit (TU) derived from BFUSBF treatment system showed that the TU of the effluent from BFUSBF reactor was much lower than that of the solution that entered the reactor. Conclusion: Based on the acute toxicity test, BFUSBF process could reduce phenol and 2,4-DNP in aqueous solutions. Therefore, it is possible to use BFUSBF process as an appropriate treatment option for wastewaters containing phenolic compounds.

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