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Poopedi E, Singh T, Gomba A. Potential Exposure to Respiratory and Enteric Bacterial Pathogens among Wastewater Treatment Plant Workers, South Africa. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4338. [PMID: 36901349 PMCID: PMC10002314 DOI: 10.3390/ijerph20054338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 02/23/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
Wastewater handling has been associated with an increased risk of developing adverse health effects, including respiratory and gastrointestinal illnesses. However, there is a paucity of information in the literature, and occupational health risks are not well quantified. Grab influent samples were analysed using Illumina Miseq 16S amplicon sequencing to assess potential worker exposure to bacterial pathogens occurring in five municipal wastewater treatment plants (WWTPs). The most predominant phyla were Bacteroidota, Campilobacterota, Proteobacteria, Firmicutes, and Desulfobacterota, accounting for 85.4% of the total bacterial community. Taxonomic analysis showed a relatively low diversity of bacterial composition of the predominant genera across all WWTPs, indicating a high degree of bacterial community stability in the influent source. Pathogenic bacterial genera of human health concern included Mycobacterium, Coxiella, Escherichia/Shigella, Arcobacter, Acinetobacter, Streptococcus, Treponema, and Aeromonas. Furthermore, WHO-listed inherently resistant opportunistic bacterial genera were identified. These results suggest that WWTP workers may be occupationally exposed to several bacterial genera classified as hazardous biological agents for humans. Therefore, there is a need for comprehensive risk assessments to ascertain the actual risks and health outcomes among WWTP workers and inform effective intervention strategies to reduce worker exposure.
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Affiliation(s)
- Evida Poopedi
- National Institute for Occupational Health, National Health Laboratory Service, Johannesburg 2000, South Africa
- Department of Clinical Microbiology and Infectious Diseases, University of the Witwatersrand, Johannesburg 2050, South Africa
| | - Tanusha Singh
- National Institute for Occupational Health, National Health Laboratory Service, Johannesburg 2000, South Africa
- Department of Clinical Microbiology and Infectious Diseases, University of the Witwatersrand, Johannesburg 2050, South Africa
- Department of Environmental Health, University of Johannesburg, Doornfontein 2028, South Africa
| | - Annancietar Gomba
- National Institute for Occupational Health, National Health Laboratory Service, Johannesburg 2000, South Africa
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Advancement of Metatranscriptomics towards Productive Agriculture and Sustainable Environment: A Review. Int J Mol Sci 2022; 23:ijms23073737. [PMID: 35409097 PMCID: PMC8998989 DOI: 10.3390/ijms23073737] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/19/2022] [Accepted: 03/26/2022] [Indexed: 01/19/2023] Open
Abstract
While chemical fertilisers and pesticides indeed enhance agricultural productivity, their excessive usage has been detrimental to environmental health. In addressing this matter, the use of environmental microbiomes has been greatly favoured as a ‘greener’ alternative to these inorganic chemicals’ application. Challenged by a significant proportion of unidentified microbiomes with unknown ecological functions, advanced high throughput metatranscriptomics is prudent to overcome the technological limitations in unfolding the previously undiscovered functional profiles of the beneficial microbiomes. Under this context, this review begins by summarising (1) the evolution of next-generation sequencing and metatranscriptomics in leveraging the microbiome transcriptome profiles through whole gene expression profiling. Next, the current environmental metatranscriptomics studies are reviewed, with the discussion centred on (2) the emerging application of the beneficial microbiomes in developing fertile soils and (3) the development of disease-suppressive soils as greener alternatives against biotic stress. As sustainable agriculture focuses not only on crop productivity but also long-term environmental sustainability, the second half of the review highlights the metatranscriptomics’ contribution in (4) revolutionising the pollution monitoring systems via specific bioindicators. Overall, growing knowledge on the complex microbiome functional profiles is imperative to unlock the unlimited potential of agricultural microbiome-based practices, which we believe hold the key to productive agriculture and sustainable environment.
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Song Y, Mhuantong W, Liu SY, Pisutpaisal N, Wongwilaiwalin S, Kanokratana P, Wang AJ, Jiang CY, Champreda V, Qiu DR, Liu SJ. Tropical and temperate wastewater treatment plants assemble different and diverse microbiomes. Appl Microbiol Biotechnol 2021; 105:853-867. [PMID: 33409607 DOI: 10.1007/s00253-020-11082-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 11/22/2020] [Accepted: 12/27/2020] [Indexed: 11/24/2022]
Abstract
The diversity and assembly of activated sludge microbiomes play a key role in the performances of municipal wastewater treatment plants (WWTPs), which are the most widely applied biotechnological process systems. In this study, we investigated the microbiomes of municipal WWTPs in Bangkok, Wuhan, and Beijing that respectively represent tropical, subtropical, and temperate climate regions, and also explored how microbiomes assembled in these municipal WWTPs. Our results showed that the microbiomes from these municipal WWTPs were significantly different. The assembly of microbiomes in municipal WWTPs followed deterministic and stochastic processes governed by geographical location, temperature, and nutrients. We found that both taxonomic and phylogenetic α-diversities of tropical Bangkok municipal WWTPs were the highest and were rich in yet-to-be-identified microbial taxa. Nitrospirae and β-Proteobacteria were more abundant in tropical municipal WWTPs, but did not result in better removal efficiencies of ammonium and total nitrogen. Overall, these results suggest that tropical and temperate municipal WWTPs harbored diverse and unique microbial resources, and the municipal WWTP microbiomes were assembled with different processes. Implications of these findings for designing and running tropical municipal WWTPs were discussed. KEY POINTS: • Six WWTPs of tropical Thailand and subtropical and temperate China were investigated. • Tropical Bangkok WWTPs had more diverse and yet-to-be-identified microbial taxa. • Microbiome assembly processes were associated with geographical location.
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Affiliation(s)
- Yang Song
- IMCAS-RCEES joint lab at CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,State Key Laboratory of Microbial Resources and Environmental Microbiology Research Center at Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.,China-Thailand Joint Laboratory on Microbial Biotechnology, Beijing, 100101, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wuttichai Mhuantong
- China-Thailand Joint Laboratory on Microbial Biotechnology, Beijing, 100101, China.,Biorefinery and Bioproduct Technology Research Group, National Center for Genetic Engineering and Biotechnology, Pathum Thani, 12120, Thailand
| | - Shuang-Yuan Liu
- China-Thailand Joint Laboratory on Microbial Biotechnology, Beijing, 100101, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Nipon Pisutpaisal
- China-Thailand Joint Laboratory on Microbial Biotechnology, Beijing, 100101, China.,Department of Agro-Industrial, Food and Environmental Technology, Faculty of Applied Science, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand
| | - Sarunyou Wongwilaiwalin
- China-Thailand Joint Laboratory on Microbial Biotechnology, Beijing, 100101, China.,Biorefinery and Bioproduct Technology Research Group, National Center for Genetic Engineering and Biotechnology, Pathum Thani, 12120, Thailand
| | - Pattanop Kanokratana
- China-Thailand Joint Laboratory on Microbial Biotechnology, Beijing, 100101, China.,Biorefinery and Bioproduct Technology Research Group, National Center for Genetic Engineering and Biotechnology, Pathum Thani, 12120, Thailand
| | - Ai-Jie Wang
- IMCAS-RCEES joint lab at CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Cheng-Ying Jiang
- IMCAS-RCEES joint lab at CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,State Key Laboratory of Microbial Resources and Environmental Microbiology Research Center at Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.,China-Thailand Joint Laboratory on Microbial Biotechnology, Beijing, 100101, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Verawat Champreda
- China-Thailand Joint Laboratory on Microbial Biotechnology, Beijing, 100101, China.,Biorefinery and Bioproduct Technology Research Group, National Center for Genetic Engineering and Biotechnology, Pathum Thani, 12120, Thailand
| | - Dong-Ru Qiu
- China-Thailand Joint Laboratory on Microbial Biotechnology, Beijing, 100101, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Shuang-Jiang Liu
- IMCAS-RCEES joint lab at CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. .,State Key Laboratory of Microbial Resources and Environmental Microbiology Research Center at Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China. .,China-Thailand Joint Laboratory on Microbial Biotechnology, Beijing, 100101, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China.
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Tao J, Liu X, Luo X, Teng T, Jiang C, Drewniak L, Yang Z, Yin H. An integrated insight into bioleaching performance of chalcopyrite mediated by microbial factors: Functional types and biodiversity. BIORESOURCE TECHNOLOGY 2021; 319:124219. [PMID: 33254450 DOI: 10.1016/j.biortech.2020.124219] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 09/30/2020] [Accepted: 10/01/2020] [Indexed: 06/12/2023]
Abstract
Six artificial communities with different function or biodiversity were reconstructed by six typical bioleaching species for chalcopyrite leaching. Absence of sulfur oxidizers in communities significantly reduced copper extraction rates, and low diversity communities also exhibited slightly poor bioleaching performances. The variations of pH, redox potential, ferrous and copper ions indicated that the community with both sulfur oxidizers and high diversity showed fast adaptation to the environment and rapid dissolution of chalcopyrite. Integrated analysis of mineralogical and microbial parameters demonstrated that functional types of microorganisms made more contributions in mediating chalcopyrite dissolution than microbial diversity. Further correlation analysis between microbial types and chalcopyrite dissolution performances showed that sulfur oxidizers, especially Acidithiobacillus caldus, could greatly accelerate chalcopyrite dissolution by regulating solution physicochemical factors, such as redox potential and pH. This study provided a theoretical basis for improving bioleaching efficiency by balancing microbial functional types and biodiversity.
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Affiliation(s)
- Jiemeng Tao
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Xueduan Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
| | - Xinyang Luo
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Tingkai Teng
- School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Chengying Jiang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Lukasz Drewniak
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
| | - Zhendong Yang
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
| | - Huaqun Yin
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China.
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5
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Assessment of Multiple Anaerobic Co-Digestions and Related Microbial Community of Molasses with Rice-Alcohol Wastewater. ENERGIES 2020. [DOI: 10.3390/en13184866] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Molasses is a highly dense and refined byproduct produced in the sugarcane industry, and it contains high amounts of degradable compounds. Through bioconversion, these compounds can be transformed into renewable products. However, the involved biological process is negatively influenced by the high chemical oxygen demand (COD) of molasses and ion concentration. The co-digestion of molasses with rice-alcohol wastewater (RAW) was compared with its mono-digestion at an increasing organic loading rate (OLR). Both processes were assessed by detecting the COD removal rate, the methane contents of biogas, and the structure and composition of microbial communities at different stages. Results showed that the co-digestion is stable up to a maximum OLR of 16 g COD L−1 d−1, whereas after the acclimatization phase, the mono-digestion process was disturbed two times, which occurred at a maximum OLR of 9 and 10 g COD L−1 d−1. The volatile fatty acids (VFAs) observed were 2059.66 mg/L and 1896.9 mg/L, which in mono-digestion causes the inhibition at maximum OLRs. In the co-digestion process, the concomitant COD removal rates and methane content recorded was 90.72 ± 0.63% 64.47% ± 0.59% correspondingly. While in the mono-digestion process, high COD removal rate and methane contents observed were 89.29 ± 0.094% and 61.37 ± 1.06% respectively. From the analysis of microbial communities, it has been observed that both the bacterial and archaeal communities respond differently at unlike stages. However, in both processes, Propionibacteriaceae was the most abundant family in the bacterial communities, whereas Methanosaetaceae was abundant in the archaeal communities. From the current study, it has been concluded that that rice-alcohol wastewater could be a good co-substrate for the anaerobic digestion of molasses in terms of COD removal rate and methane contents production, that could integrate molasses into progressive biogas production with high OLR.
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Sajjad W, Zheng G, Ma X, Xu W, Ali B, Rafiq M, Zada S, Irfan M, Zeman J. Dissolution of Cu and Zn-bearing ore by indigenous iron-oxidizing bacterial consortia supplemented with dried bamboo sawdust and variations in bacterial structural dynamics: A new concept in bioleaching. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 709:136136. [PMID: 31884267 DOI: 10.1016/j.scitotenv.2019.136136] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 11/19/2019] [Accepted: 12/14/2019] [Indexed: 06/10/2023]
Abstract
Disposing of low-grade ores involves numerous environmental issues. Bioleaching with acidophilic bacteria is the preferred solution to process these ores for metals recovery. In this study, indigenous iron-oxidizing bacteria Acidithiobacillus ferrooxidans, Leptospirillum ferriphilum, and Leptospirillum ferrooxidans were used in consortia supplemented with acid-treated bamboo sawdust (BSD) for copper and zinc recovery. Findings showed the extreme catalytic response of BSD with the best recovery of metals. Maximum of 92.2 ± 4.0% copper (0.35%) and 90.0 ± 5.4% zinc (0.33%) were recovered after 8 days of processing in the presence of 2 g/L BSD. Significant variations were reported in physicochemical parameters during bioleaching in the presence of a different concentration of BSD. Fourier Transform Infrared spectroscopy results of bioleached residues showed significant variations in spectral pattern and maximum variations were reported in 2.0 g/L BSD, which indicates maximum metals dissolutions. The impact of bacterial consortia and BSD on iron speciation of bioleached ores was analyzed by using Mössbauer spectroscopy and clear variations in iron speciation were reported. Furthermore, the bacterial community structure dynamics revealed significant variations in the individual bacterial proportion in each experiment. This finding shows that the dosage concentration of BSD influenced the microenvironment, which effect the bacterial abundance and these variations in the bacterial structural communities were not associated with the initial proportion of bacterial cells inoculated in the bioleaching process. Moreover, the mechanism of chemical reactions was proposed by explaining the possible role of BSD as a reductant under micro-aerophilic conditions that facilitates the bacterial reduction of ferric iron. This type of bioleaching process with indigenous iron-oxidizing bacteria and BSD has significant potential to further upscale the bioleaching process for recalcitrant ore bodies in an environment friendly and cost-effective way.
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Affiliation(s)
- Wasim Sajjad
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China; State Key Laboratory of Cryosphere Science, Northwest Institute of Eco-Environment and Resources, University of Chinese Academy of Sciences, Lanzhou, China
| | - Guodong Zheng
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China.
| | - Xiangxian Ma
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China
| | - Wang Xu
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China
| | - Barkat Ali
- State Key Laboratory of Cryosphere Science, Northwest Institute of Eco-Environment and Resources, University of Chinese Academy of Sciences, Lanzhou, China
| | - Muhammad Rafiq
- Department of Microbiology, Faculty of Life Sciences and Informatics, Balochistan University of IT, Engineering and Management Sciences, Quetta, Pakistan
| | - Sahib Zada
- Department of Biology, College of Science, Shantou University, Shantou, China
| | - Muhammad Irfan
- Department of Microbiology and Cell Science Genetics Institute and Institute of Food and Agricultural Science, University of Florida, Gainesville, FL, United States of America
| | - Josef Zeman
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China; Department of Geological Sciences, Faculty of Science, Masaryk University, Kotlářská 267/2, 611 37 Brno, Czech Republic
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7
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Advances in monitoring soil microbial community dynamic and function. J Appl Genet 2020; 61:249-263. [PMID: 32062778 DOI: 10.1007/s13353-020-00549-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 01/17/2020] [Accepted: 02/06/2020] [Indexed: 12/22/2022]
Abstract
Microorganisms are vital to the overall ecosystem functioning, stability, and sustainability. Soil fertility and health depend on chemical composition and also on the qualitative and quantitative nature of microorganisms inhabiting it. Historically, denaturing gradient gel electrophoresis (DGGE) and temperature gradient gel electrophoresis (TGGE), single-strand conformation polymorphism, DNA amplification fingerprinting, amplified ribosomal DNA restriction analysis, terminal restriction fragment length polymorphism, length heterogeneity PCR, and ribosomal intergenic spacer analysis were used to assess soil microbial community structure (SMCS), abundance, and diversity. However, these methods had significant shortcomings and limitations for application in land reclamation monitoring. SMCS has been primarily determined by phospholipid fatty acid (PLFA) analysis. This method provides a direct measure of viable biomass in addition to a biochemical profile of the microbial community. PLFA has limitations such as overlap in the composition of microorganisms and the specificity of PLFAs signature. In recent years, high-throughput next-generation sequencing has dramatically increased the resolution and detectable spectrum of diverse microbial phylotypes from environmental samples and it plays a significant role in microbial ecology studies. Next-generation sequencings using 454, Illumina, SOLiD, and Ion Torrent platforms are rapid and flexible. The two methods, PLFA and next-generation sequencing, are useful in detecting changes in microbial community diversity and structure in different ecosystems. Single-molecule real-time (SMRT) and nanopore sequencing technologies represent third-generation sequencing (TGS) platforms that have been developed to address the shortcomings of second-generation sequencing (SGS). Enzymatic and soil respiration analyses are performed to further determine soil quality and microbial activities. Other valuable methods that are being recently applied to microbial function and structures include NanoSIM, GeoChip, and DNA stable staple isotope probing (DNA-SIP) technologies. They are powerful metagenomics tool for analyzing microbial communities, including their structure, metabolic potential, diversity, and their impact on ecosystem functions. This review is a critical analysis of current methods used in monitoring soil microbial community dynamic and functions.
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Wang W, Pang C, Sierra JM, Hu Z, Ren X. Performance and recovery of a completely separated partial nitritation and anammox process treating phenol-containing wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:33917-33926. [PMID: 29982943 DOI: 10.1007/s11356-018-2701-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 07/03/2018] [Indexed: 06/08/2023]
Abstract
Anammox process is considered as a promising technology for removing total nitrogen from low-strength ammonium and phenol-containing wastewater. However, it is still a challenge for the anammox process to treat high-strength ammonium and phenol-containing wastewater. A completely separated partial nitritation and anammox (CSPN/A) process was developed to remove total nitrogen from high-strength phenol-containing wastewater. About 92% of COD, 100% of phenol, and 82.4% of total nitrogen were successfully removed at a NH4+-N concentration of 200 mg L-1 with a phenol/NH4+-N mass ratio of 0.5 in the CSPN/A process. Furthermore, a shock loading of 300 mg phenol L-1 with a phenol/NH4+-N mass ratio of 1.5 led to a complete failure of partial nitritation, but the performance was rapidly recovered by the increase of NH4+-N concentration. Although the activities of ammonium-oxidizing bacteria and anammox bacteria were severely inhibited at a phenol/NH4+-N mass ratio of 1.5, the enrichment of efficient phenol degraders in the CSPN stage could strengthen the performance robustness of partial nitritation and anammox process. Therefore, this study presented a new insight on the feasibility of the anammox process for treating high-strength ammonium and phenol-containing wastewater.
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Affiliation(s)
- Wei Wang
- Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, 230009, China.
- Key Laboratory of Urban Pollutant Conversion, Chinese Academy of Sciences, University of Science and Technology of China, Hefei, 230009, China.
| | - Chao Pang
- Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Julian Muñoz Sierra
- Section Sanitary Engineering, Department of Water Management, Delft University of Technology, Stevinweg 1, 2628CN, Delft, The Netherlands
- KWR Watercycle Research Institute, Groningenhaven 7, 3430BB, Nieuwegein, The Netherlands
| | - Zhenhu Hu
- Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xuesong Ren
- Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, 230009, China
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Li D, Liang X, Li Z, Jin Y, Zhou R, Wu C. Effect of chemical oxygen demand load on the nitrification and microbial communities in activated sludge from an aerobic nitrifying reactor. Can J Microbiol 2019; 66:59-70. [PMID: 31644885 DOI: 10.1139/cjm-2018-0599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this study, we explored the effect of chemical oxygen demand (COD) load on the nitrification and microbial communities in activated sludge isolated from an aerobic nitrifying tank. The activated sludge was cultured in three different COD groups: L-COD, 200 mg/L; M-COD, 1200 mg/L; H-COD, 4200 mg/L. The results indicated that the COD exerts a negligible effect on the nitrogen removal ability within the first 24 h. However, the nitrification rate decreased with culture time; the ammonium degradation rates were found to be 80.26%, 57.56%, and 43.43% at 72 h in the three COD groups, respectively. These values correspond to decreases of 19.40%, 41.83%, and 51.48%, respectively, in relation to those observed at 24 h. The activated sludge in the different COD groups exhibited similar community compositions after 24 h, as assessed by Illumina high-throughput sequencing, while a significant difference in the relative abundances of some organisms occurred after 48 and 72 h. Proteobacteria was the main phylum, with a relative abundance of >51.45%. The genera Aridibacter, Paracoccus, Nitrospira, and Nitrosomonas were suppressed by COD load over time. This study may contribute to our knowledge about the nitrification ability and microbial communities in activated sludge at different COD load levels.
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Affiliation(s)
- Dan Li
- College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China.,College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China
| | - Xihong Liang
- College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China.,College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China
| | - Zhengwei Li
- College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China.,College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China
| | - Yao Jin
- College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China.,College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China
| | - Rongqing Zhou
- College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China.,College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China
| | - Chongde Wu
- College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China.,College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China; Key Laboratory of Leather Chemistry and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, P.R. China
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10
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Sant' Anna D, Sampaio JLM, Sommaggio LRD, Mazzeo DEC, Marin-Morales MA, Marson FAL, Levy CE. The applicability of gene sequencing and MALDI-TOF to identify less common gram-negative rods (Advenella, Castellaniella, Kaistia, Pusillimonas and Sphingobacterium) from environmental isolates. Antonie van Leeuwenhoek 2019; 113:233-252. [PMID: 31560092 DOI: 10.1007/s10482-019-01333-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 09/13/2019] [Indexed: 11/26/2022]
Abstract
Our aim was to identify less common non-fermenting gram-negative rods during the bioremediation process. Five genera were found: Advenella, Castellaniella, Kaistia, Pusillimonas and Sphingobacterium, for a total of 15 isolates. Therefore, we evaluated the applicability of four methods currently available for bacteria identification: (1) conventional biochemical methods, (2) the VITEK®-2 system, (3) MALDI-TOF mass spectrometry and (4) 16S rRNA gene sequencing. The biochemical methods and the VITEK®-2 system were reliable only for the Sphingobacterium isolate and solely at the genus level. Both MALDI-TOF mass spectrometry platforms (Bruker and VITEK® MS) did not achieve reliable identification results for any of these genera. 16S rRNA gene sequencing identified eight isolates to the species level but not to the subspecies level, when applicable. The remaining seven isolates were reliably identified through 16S rRNA gene sequencing to the genus level only. Our findings suggest that the detection and identification of less common genera (and species) that appeared at certain moments during the bioremediation process can be a challenge to microbiologists considering the most used techniques. In addition, more studies are required to confirm our results.
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Affiliation(s)
- Débora Sant' Anna
- Microbiology Laboratory, Department of Clinical Pathology, Faculty of Medical Sciences, University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária, Campinas, São Paulo, 13083-887, Brazil.
- Molecular Oncology Research Center, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, São Paulo, Brazil.
| | - Jorge Luiz Mello Sampaio
- Microbiology Section, Fleury-Centers for Diagnostic Medicine, Av. General Waldomiro de Lima 508, São Paulo, 04344-070, Brazil
- Clinical Analysis and Toxicology Department, School of Pharmacy, University of São Paulo, Av. Professor Lineu Prestes, 580, Butantã, São Paulo, 05508-000, Brazil
| | - Lais Roberta Deroldo Sommaggio
- Department of Biology, Institute of Biosciences, São Paulo State University - Rio Claro, Av. 24 A, 1515, Bela Vista, Rio Claro, São Paulo, 13506-900, Brazil
| | - Dânia Elisa Christofoletti Mazzeo
- Department of Analytical Chemistry, Institute of Chemistry, São Paulo State University - Araraquara, Rua Professor Francisco Degni, 55, Araraquara, São Paulo, 14800-060, Brazil
| | - Maria Aparecida Marin-Morales
- Department of Biology, Institute of Biosciences, São Paulo State University - Rio Claro, Av. 24 A, 1515, Bela Vista, Rio Claro, São Paulo, 13506-900, Brazil
| | - Fernando Augusto Lima Marson
- Department of Pediatrics, Faculty of Medical Sciences, University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária, Campinas, São Paulo, 13083-887, Brazil.
- Laboratory of Pulmonary Physiology, Center for Pediatrics Investigation, Faculty of Medical Sciences, University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária, Campinas, São Paulo, 13083-887, Brazil.
- Department of Medical Genetics and Genomic Medicine, Faculty of Medical Sciences, University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária, Campinas, São Paulo, 13083-887, Brazil.
- Post-Graduate Program in Health Science, São Francisco University, Avenida São Francisco de Assis, 218, Cidade Universitária, Bragança Paulista, São Paulo, 12916-400, Brazil.
| | - Carlos Emílio Levy
- Microbiology Laboratory, Department of Clinical Pathology, Faculty of Medical Sciences, University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária, Campinas, São Paulo, 13083-887, Brazil.
- Department of Pediatrics, Faculty of Medical Sciences, University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária, Campinas, São Paulo, 13083-887, Brazil.
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11
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Dai C, Ma Q, Li Y, Zhou D, Yang B, Qu Y. Application of an efficient indole oxygenase system from Cupriavidus sp. SHE for indigo production. Bioprocess Biosyst Eng 2019; 42:1963-1971. [PMID: 31482396 DOI: 10.1007/s00449-019-02189-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 08/03/2019] [Indexed: 10/26/2022]
Abstract
Indigo, one of the most widely used dyes, is mainly produced by chemical processes, which generate amounts of pollutants and need high energy consumption. Microbial production of indigo from indole has attracted much attention; however, the indole oxygenase has never been explored and applied for indigo production. In the present study, the indole oxygenase indAB genes were successfully cloned from Cupriavidus sp. SHE and heterologously expressed in Escherichia coli BL21(DE3) (designated as IND_AB). Strain IND_AB produced primarily indigo in tryptophan medium by high-performance liquid chromatography-mass spectroscopy (HPLC-MS) analysis. The preferable conditions for indigo production were pH 6.5 (normal pH), 30 °C, 150 rpm, strain inoculation concentration OD600 0.08, and induction with 1 mM IPTG at the time of inoculation. The optimal culture medium compositions were further determined as tryptophan 1.0 g/L, NaCl 3.55 g/L, and yeast extract 5.12 g/L based on single-factor experiment and response surface methodology. The highest indigo yield was 307 mg/L, which was 4.39-fold higher than the original value. This is the first study investigating indigo production using the indole oxygenase system and the results highlighted its potential in bio-indigo industrial application.
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Affiliation(s)
- Chunxiao Dai
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Qiao Ma
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China
| | - Yan Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Duandi Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Bingyu Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Yuanyuan Qu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
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12
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Correlation between Jejunal Microbial Diversity and Muscle Fatty Acids Deposition in Broilers Reared at Different Ambient Temperatures. Sci Rep 2019; 9:11022. [PMID: 31363155 PMCID: PMC6667446 DOI: 10.1038/s41598-019-47323-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 07/12/2019] [Indexed: 12/14/2022] Open
Abstract
Temperature, which is an important environmental factor in broiler farming, can significantly influence the deposition of fatty acids in muscle. 300 one-day-old broiler chicks were randomly divided into three groups and reared at high, medium and low temperatures (HJ, MJ and LJ), respectively. Breast muscle and jejunal chyme samples were collected and subjected to analyses of fatty acid composition and 16S rRNA gene sequencing. Through spearman’s rank correlation coefficient, the data were used to characterize the correlation between jejunal microbial diversity and muscle fatty acid deposition in the broilers. The results showed that Achromobacter, Stenotrophomonas, Pandoraea, Brevundimonas, Petrobacter and Variovorax were significantly enriched in the MJ group, and all of them were positively correlated with the fatty acid profiling of muscle and multiple lipid metabolism signaling pathways. Lactobacillus was significantly enriched in the HJ group and exhibited a positive correlation with fatty acid deposition. Pyramidobacter, Dialister, Bacteroides and Selenomonas were significantly enriched in the LJ group and displayed negative correlation with fatty acid deposition. Taken together, this study demonstrated that the jejunal microflora manifested considerable changes at high and low ambient temperatures and that jejunal microbiota changes were correlated with fatty acid deposition of muscle in broilers.
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13
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He B, Li H, Hu Z, Zhang Y, Sun M, Qiu S, Zeng B. Difference in microbial community and taste compounds between Mucor-type and Aspergillus-type Douchi during koji-making. Food Res Int 2019; 121:136-143. [PMID: 31108734 DOI: 10.1016/j.foodres.2019.03.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 03/12/2019] [Accepted: 03/14/2019] [Indexed: 02/05/2023]
Abstract
Douchi has attracted people's attention because of its unique taste and rich health function. The microbes participated in the koji-making process contribute to taste compounds of Douchi. However, the majority of studies on Douchi focused on their functional components and the microbial community in single type of Douchi during koji-making so far. In the present study, the taste components of Mucor-type and Aspergillus-type Douchi were measured initially and the results showed that the amino acid and organic acid levels as well as the percentage of unsaturated fatty acids in Mucor-type Douchi were significantly higher than those in Aspergillus-type. The investigation of the microbial composition in two types of Douchi showed that Aspergillus, Candida, Meyerozyma and Lecanicillium were shared by >50% of samples during koji-making. Comparison of the microbial community between the two types of Douchi revealed that Meyerozyma and Lecanicillium were the main microbial community with significant difference during the initial stage of koji-making, while Candida was significantly different during the later stage of koji-making. When supplemented with Meyerozyma and Candida in Aspergillus-type Douchi, the level of all amino acid and organic acids as well as the percentage of unsaturated fatty acid was significant improved, which further validated the importance roles of the two microorganisms in enhancing the taste components of Douchi during koji-making. The results provide useful information on optimizing the microbial community structure of Douchi during the process of koji-making and improving the product quality.
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Affiliation(s)
- Bin He
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Haoran Li
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Zhihong Hu
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Yihan Zhang
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Min Sun
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Shangkun Qiu
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Bin Zeng
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, College of Life Sciences, Jiangxi Science & Technology Normal University, Nanchang 330013, China.
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14
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Xie C, Zeng H, Qin L. Physicochemical, taste, and functional changes during the enhanced fermentation of low-salt Sufu paste, a Chinese fermented soybean food. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2019. [DOI: 10.1080/10942912.2018.1560313] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Chunzhi Xie
- School of Liquor and Food Engineering, Guizhou University, Guiyang, China
- College of Life Science, Guizhou University, Guiyang, China
| | - Haiying Zeng
- School of Liquor and Food Engineering, Guizhou University, Guiyang, China
| | - Likang Qin
- School of Liquor and Food Engineering, Guizhou University, Guiyang, China
- Key Laboratory of Agricultural and Animal Products Storage and Processing of Guizhou Province, Guizhou University, Guiyang, China
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15
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Ma Q, Zhang X, Qu Y. Biodegradation and Biotransformation of Indole: Advances and Perspectives. Front Microbiol 2018; 9:2625. [PMID: 30443243 PMCID: PMC6221969 DOI: 10.3389/fmicb.2018.02625] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 10/15/2018] [Indexed: 11/17/2022] Open
Abstract
Indole is long regarded as a typical N-heterocyclic aromatic pollutant in industrial and agricultural wastewater, and recently it has been identified as a versatile signaling molecule with wide environmental distributions. An exponentially growing number of researches have been reported on indole due to its significant roles in bacterial physiology, pathogenesis, animal behavior and human diseases. From the viewpoint of both environmental bioremediation and biological studies, the researches on metabolism and fates of indole are important to realize environmental treatment and illuminate its biological function. Indole can be produced from tryptophan by tryptophanase in many bacterial species. Meanwhile, various bacterial strains have obtained the ability to transform and degrade indole. The characteristics and pathways for indole degradation have been investigated for a century, and the functional genes for indole aerobic degradation have also been uncovered recently. Interestingly, many oxygenases have proven to be able to oxidize indole to indigo, and this historic and motivating case for biological applications has attracted intensive attention for decades. Herein, the bacteria, enzymes and pathways for indole production, biodegradation and biotransformation are systematically summarized, and the future researches on indole-microbe interactions are also prospected.
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Affiliation(s)
- Qiao Ma
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
| | - Xuwang Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Food and Environment, Dalian University of Technology, Panjin, China
| | - Yuanyuan Qu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
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16
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Stoeck T, Pan H, Dully V, Forster D, Jung T. Towards an eDNA metabarcode-based performance indicator for full-scale municipal wastewater treatment plants. WATER RESEARCH 2018; 144:322-331. [PMID: 30053623 DOI: 10.1016/j.watres.2018.07.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/15/2018] [Accepted: 07/19/2018] [Indexed: 06/08/2023]
Abstract
Knowledge-driven management for wastewater treatment plant (WWTP) performance becomes increasingly important considering the globally growing production of wastewater and the rising demand of clean water supply. Even though the potential of microbial organisms (bacteria and protists) as bioindicators for WWTP performance is well known, it is far from being fully exploited for routine monitoring programs. Therefore, we here used massive sequencing of environmental (e)DNA metabarcodes from bacterial (V3-V4 region of the SSU rRNA gene) and eukaryote (V9 region of the SSU rRNA gene) communities in 21 activated sludge samples obtained from full-scale municipal WWTPs in Germany. Microbial community patterns were compared to standard WWTP operating parameters and two traditionally used WWTP performance indicators (Sludge Biotic Index and Sludge Index). Both indices showed low concordance and hardly correlated with chemical WWTP performance parameters nor did they correlate with microbial community structures. In contrast, microbial community profiles significantly correlated with WWTP performance parameters and operating conditions of the plants under study. Therefore, eDNA metabarcode profiles of whole microbial communities indicate the performance of WWTP and can provide useful information for management strategies. We here suggest a strategy for the development of an eDNA metabarcode based bioindicator system, which can be implemented in future standard monitoring programs for WWTP performance and effluent quality.
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Affiliation(s)
- Thorsten Stoeck
- University of Kaiserslautern, Ecology Group, D-67663, Kaiserslautern, Germany.
| | - Hongbo Pan
- University of Kaiserslautern, Ecology Group, D-67663, Kaiserslautern, Germany; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Shanghai, 201306, PR China
| | - Verena Dully
- University of Kaiserslautern, Ecology Group, D-67663, Kaiserslautern, Germany
| | - Dominik Forster
- University of Kaiserslautern, Ecology Group, D-67663, Kaiserslautern, Germany
| | - Thorsten Jung
- Stadtentwässerung Kaiserslautern, D-67659, Kaiserslautern, Germany
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17
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Wang F, Zhao H, Xiang H, Wu L, Men X, Qi C, Chen G, Zhang H, Wang Y, Xian M. Species Diversity and Functional Prediction of Surface Bacterial Communities on Aging Flue-Cured Tobaccos. Curr Microbiol 2018; 75:1306-1315. [PMID: 29869679 DOI: 10.1007/s00284-018-1525-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 06/01/2018] [Indexed: 01/04/2023]
Abstract
Microbes on aging flue-cured tobaccos (ATFs) improve the aroma and other qualities desirable in products. Understanding the relevant organisms would picture microbial community diversity, metabolic potential, and their applications. However, limited efforts have been made on characterizing the microbial quality and functional profiling. Herein, we present our investigation of the bacterial diversity and predicted potential genetic capability of the bacteria from two AFTs using 16S rRNA gene sequences and phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt) software. The results show that dominant bacteria from AFT surfaces were classified into 48 genera, 36 families, and 7 phyla. In addition, Bacillus spp. was found prevalent on both ATFs. Furthermore, PICRUSt predictions of bacterial community functions revealed many attractive metabolic capacities in the AFT microbiota, including several involved in the biosynthesis of flavors and fragrances and the degradation of harmful compounds, such as nicotine and nitrite. These results provide insights into the importance of AFT bacteria in determining product qualities and indicate specific microbial species with predicted enzymatic capabilities for the production of high-efficiency flavors, the degradation of undesirable compounds, and the provision of nicotine and nitrite tolerance which suggest fruitful areas of investigation into the manipulation of AFT microbiota for AFT and other product improvements.
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Affiliation(s)
- Fan Wang
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Hongwei Zhao
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Haiying Xiang
- Yunnan Academy of Tobacco Sciences, Kunming, 650106, China
| | - Lijun Wu
- Yunnan Academy of Tobacco Sciences, Kunming, 650106, China
| | - Xiao Men
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Chang Qi
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Guoqiang Chen
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Haibo Zhang
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
| | - Yi Wang
- Yunnan Academy of Tobacco Sciences, Kunming, 650106, China.
| | - Mo Xian
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
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18
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Zhang X, Qu Y, Ma Q, Li S, Dai C, Lian S, Zhou J. Performance and Microbial Community Analysis of Bioaugmented Activated Sludge System for Indigo Production from Indole. Appl Biochem Biotechnol 2018; 187:1437-1447. [DOI: 10.1007/s12010-018-2879-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 09/09/2018] [Indexed: 11/29/2022]
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19
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Zhu J, Chen L, Zhang Y, Zhu X. Revealing the anaerobic acclimation of microbial community in a membrane bioreactor for coking wastewater treatment by Illumina Miseq sequencing. J Environ Sci (China) 2018; 64:139-148. [PMID: 29478633 DOI: 10.1016/j.jes.2017.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 03/29/2017] [Accepted: 06/01/2017] [Indexed: 06/08/2023]
Abstract
The dynamic change of microbial community during sludge acclimation from aerobic to anaerobic in a MBR for coking wastewater treatment was revealed by Illumina Miseq sequencing in this study. The diversity of both Bacteria and Archaea showed an increase-decrease trajectory during acclimation, and exhibited the highest at the domestication interim. Ignavibacteria changed from a tiny minority (less than 1%) to the dominant bacterial group (54.0%) along with acclimation. The relative abundance of Betaproteobacteria kept relatively steady, as in this class some species increased coupled with some other species decreased during acclimation. The dominant Archaea shifted from Halobacteria in initial aerobic sludge to Methanobacteria in the acclimated anaerobic sludge. The dominant bacterial and archaeal groups in different acclimation stages were indigenous microorganisms in the initial sludge, though some of them were very rare. This study supported that the species in "rare biosphere" might eventually become dominant in response to environmental change.
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Affiliation(s)
- Jiadi Zhu
- School of Environment, Tsinghua University, Beijing 100084, China.
| | - Lujun Chen
- School of Environment, Tsinghua University, Beijing 100084, China; Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Environmental Technology and Ecology, Yangtze Delta Region Institute of Tsinghua University, Zhejiang, Jiaxing 314050, China
| | - Yan Zhang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China.
| | - Xiaobiao Zhu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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20
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Joshi DR, Zhang Y, Zhang H, Gao Y, Yang M. Characteristics of microbial community functional structure of a biological coking wastewater treatment system. J Environ Sci (China) 2018; 63:105-115. [PMID: 29406094 DOI: 10.1016/j.jes.2017.07.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 07/18/2017] [Accepted: 07/19/2017] [Indexed: 06/07/2023]
Abstract
Nitrogenous heterocyclic compounds are key pollutants in coking wastewater; however, the functional potential of microbial communities for biodegradation of such contaminants during biological treatment is still elusive. Herein, a high throughput functional gene array (GeoChip 5.0) in combination with Illumina HiSeq2500 sequencing was used to compare and characterize the microbial community functional structure in a long run (500days) bench scale bioreactor treating coking wastewater, with a control system treating synthetic wastewater. Despite the inhibitory toxic pollutants, GeoChip 5.0 detected almost all key functional gene (average 61,940 genes) categories in the coking wastewater sludge. With higher abundance, aromatic ring cleavage dioxygenase genes including multi ring1,2diox; one ring2,3diox; catechol represented significant functional potential for degradation of aromatic pollutants which was further confirmed by Illumina HiSeq2500 analysis results. Response ratio analysis revealed that three nitrogenous compound degrading genes- nbzA (nitro-aromatics), tdnB (aniline), and scnABC (thiocyanate) were unique for coking wastewater treatment, which might be strong cause to increase ammonia level during the aerobic process. Additionally, HiSeq2500 elucidated carbozole and isoquinoline degradation genes in the system. These findings expanded our understanding on functional potential of microbial communities to remove organic nitrogenous pollutants; hence it will be useful in optimization strategies for biological treatment of coking wastewater.
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Affiliation(s)
- Dev Raj Joshi
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu Zhang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Hong Zhang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yingxin Gao
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
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21
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Zhang Y, Ping Y, Zhou R, Wang J, Zhang G. High throughput sequencing-based analysis of microbial diversity in dental unit waterlines supports the importance of providing safe water for clinical use. J Infect Public Health 2017; 11:357-363. [PMID: 28988812 DOI: 10.1016/j.jiph.2017.09.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 09/02/2017] [Accepted: 09/09/2017] [Indexed: 01/27/2023] Open
Abstract
This study aims to explore the water quality of dental unit waterlines (DUWLs) and the diversity of microbial communities in DUWLs. Water samples from 33 dental chair units (DCUs) were collected, diluted and then spread on sterilized R2A plate for incubation. Subsequently, the microbial colony-forming units per milliliter (CFU/ml) were recorded by an automatic colony analyzer. Total DNA extracted from the rest of the samples was tested on the Illumina MiSeq PE300 platform. T-test and Kruskal-Wallis rank test were adopted for statistical analysis. Significance was assumed at a P<0.05. After incubation, the average total microbial count was 21,413.13±17,861.00CFU/ml. High-throughput sequencing revealed 10 bacterial phyla, including 9 identified and 1 unclassified phyla. Totally 63 sequences were identified at the genus level, including 42 genera, 3 tentative species and 18 unclassified genera. In addition, 7 potential human pathogenic bacteria were detected. In summary, department, brand and service life of DCUs do not influence the water quality of DUWLs significantly. The diversity of microbial communities in DUWLs is abundant and includes both pathogenic and some unknown bacteria.
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Affiliation(s)
- Yuan Zhang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yifan Ping
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ruyu Zhou
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Juan Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Department of Endodontics and Operative Dentistry, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China.
| | - Guangdong Zhang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Department of Endodontics and Operative Dentistry, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China.
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22
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Adipokine Contribution to the Pathogenesis of Osteoarthritis. Mediators Inflamm 2017; 2017:5468023. [PMID: 28490838 PMCID: PMC5401756 DOI: 10.1155/2017/5468023] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 02/25/2017] [Accepted: 03/07/2017] [Indexed: 12/13/2022] Open
Abstract
Recent studies have shown that overweight and obesity play an important role in the development of osteoarthritis (OA). However, joint overload is not the only risk factor in this disease. For instance, the presence of OA in non-weight-bearing joints such as the hand suggests that metabolic factors may also contribute to its pathogenesis. Recently, white adipose tissue (WAT) has been recognized not only as an energy reservoir but also as an important secretory organ of adipokines. In this regard, adipokines have been closely associated with obesity and also play an important role in bone and cartilage homeostasis. Furthermore, drugs such as rosuvastatin or rosiglitazone have demonstrated chondroprotective and anti-inflammatory effects in cartilage explants from patients with OA. Thus, it seems that adipokines are important factors linking obesity, adiposity, and inflammation in OA. In this review, we are focused on establishing the physiological mechanisms of adipokines on cartilage homeostasis and evaluating their role in the pathophysiology of OA based on evidence derived from experimental research as well as from clinical-epidemiological studies.
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Remmas N, Roukouni C, Ntougias S. Bacterial community structure and prevalence of Pusillimonas-like bacteria in aged landfill leachate. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:6757-6769. [PMID: 28091993 DOI: 10.1007/s11356-017-8416-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 01/05/2017] [Indexed: 06/06/2023]
Abstract
Although several works have been performed from an engineering point of view, a limited number of studies have focused on microbial communities involved in the humification of aged landfill leachates. In this work, cultivation techniques, next-generation sequencing, and phospholipid fatty acid analysis were adopted to decrypt the diversity and the ecophysiological properties of the dominant microbiota in aged landfill leachate. Based on Illumina sequencing, Betaproteobacteria, Bacteroidetes, Actinobacteria, and Alphaproteobacteria dominated the aged landfill leachate. The main taxa identified at genus level were Pusillimonas-like bacteria and Leucobacter (41.46% of total reads), with all of them being also isolated through cultivation. The presence of Pusillimonas-like bacteria was also verified by the detection of cyclo17:0 and iso-19:0 fatty acids in aged landfill leachate microbiota. Despite that almost all bacterial isolates exhibited extracellular lipolytic ability, no particular specificity was observed in the type of substrate utilized. The prevalence of effective degraders, such as Pusillimonas-like bacteria, makes the aged landfill leachate an ideal source for isolation of novel microorganisms with potential in situ bioremediation uses.
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Affiliation(s)
- Nikolaos Remmas
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67100, Xanthi, Greece
| | - Charikleia Roukouni
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67100, Xanthi, Greece
| | - Spyridon Ntougias
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67100, Xanthi, Greece.
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Ma L, Wang X, Feng X, Liang Y, Xiao Y, Hao X, Yin H, Liu H, Liu X. Co-culture microorganisms with different initial proportions reveal the mechanism of chalcopyrite bioleaching coupling with microbial community succession. BIORESOURCE TECHNOLOGY 2017; 223:121-130. [PMID: 27788425 DOI: 10.1016/j.biortech.2016.10.056] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 10/12/2016] [Accepted: 10/19/2016] [Indexed: 06/06/2023]
Abstract
The effect of co-culture microorganisms with different initial proportions on chalcopyrite bioleaching was investigated. Communities were rebuilt by six typical strains isolated from the same habitat. The results indicated, by community with more sulfur oxidizers at both 30 and 40°C, the final copper extraction rate was 19.8% and 6.5% higher, respectively, than that with more ferrous oxidizers. The variations of pH, redox potential, ferrous and copper ions in leachate also provided evidences that community with more sulfur oxidizers was more efficient. Community succession of free and attached cells revealed that initial proportions played decisive roles on community dynamics at 30°C, while communities shared similar structures, not relevant to initial proportions at 40°C. X-ray diffraction analysis confirmed different microbial functions on mineral surface. A mechanism model for chalcopyrite bioleaching was established coupling with community succession. This will provide theoretical basis for reconstructing an efficient community in industrial application.
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Affiliation(s)
- Liyuan Ma
- School of Minerals Processing and Bioengineering, Central South University, 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, 410083, China
| | - Xingjie Wang
- School of Minerals Processing and Bioengineering, Central South University, 410083, China
| | - Xue Feng
- School of Minerals Processing and Bioengineering, Central South University, 410083, China
| | - Yili Liang
- School of Minerals Processing and Bioengineering, Central South University, 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, 410083, China
| | - Yunhua Xiao
- School of Minerals Processing and Bioengineering, Central South University, 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, 410083, China
| | - Xiaodong Hao
- School of Minerals Processing and Bioengineering, Central South University, 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, 410083, China
| | - Huaqun Yin
- School of Minerals Processing and Bioengineering, Central South University, 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, 410083, China
| | - Hongwei Liu
- School of Minerals Processing and Bioengineering, Central South University, 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, 410083, China
| | - Xueduan Liu
- School of Minerals Processing and Bioengineering, Central South University, 410083, China; Key Laboratory of Biometallurgy of Ministry of Education, 410083, China.
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25
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Fu J, Lv H, Chen F. Diversity and Variation of Bacterial Community Revealed by MiSeq Sequencing in Chinese Dark Teas. PLoS One 2016; 11:e0162719. [PMID: 27690376 PMCID: PMC5045175 DOI: 10.1371/journal.pone.0162719] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 08/26/2016] [Indexed: 01/02/2023] Open
Abstract
Chinese dark teas (CDTs) are now among the popular tea beverages worldwide due to their unique health benefits. Because the production of CDTs involves fermentation that is characterized by the effect of microbes, microorganisms are believed to play critical roles in the determination of the chemical characteristics of CDTs. Some dominant fungi have been identified from CDTs. In contrast, little, if anything, is known about the composition of bacterial community in CDTs. This study was set to investigate the diversity and variation of bacterial community in four major types of CDTs from China. First, the composition of the bacterial community of CDTs was determined using MiSeq sequencing. From the four typical CDTs, a total of 238 genera that belong to 128 families of bacteria were detected, including most of the families of beneficial bacteria known to be associated with fermented food. While different types of CDTs had generally distinct bacterial structures, the two types of brick teas produced from adjacent regions displayed strong similarity in bacterial composition, suggesting that the producing environment and processing condition perhaps together influence bacterial succession in CDTs. The global characterization of bacterial communities in CDTs is an essential first step for us to understand their function in fermentation and their potential impact on human health. Such knowledge will be important guidance for improving the production of CDTs with higher quality and elevated health benefits.
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Affiliation(s)
- Jianyu Fu
- Key Laboratory of Tea Plants Biology and Resources Utilization of Agriculture Ministry, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, PR China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, PR China
- * E-mail:
| | - Haipeng Lv
- Key Laboratory of Tea Plants Biology and Resources Utilization of Agriculture Ministry, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, PR China
| | - Feng Chen
- Department of Plant Sciences, University of Tennessee, Knoxville, TN, 37996–4561, United States of America
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26
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Summer holidays as break-point in shaping a tannery sludge microbial community around a stable core microbiota. Sci Rep 2016; 6:30376. [PMID: 27461169 PMCID: PMC4961970 DOI: 10.1038/srep30376] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Accepted: 07/04/2016] [Indexed: 11/08/2022] Open
Abstract
Recently, several investigations focused on the discovery of a bacterial consortium shared among different wastewater treatment plants (WWTPs). Nevertheless, the definition of a core microbiota over time represents the necessary counterpart in order to unravel the dynamics of bacterial communities in these environments. Here we performed a monthly survey on the bacterial community of a consortial industrial plant. Objectives of this study were: (1) to identify a core microbiota constant over time; (2) to evaluate the temporal dynamics of the community during one year. A conspicuous and diversified core microbiota is constituted by operational taxonomic units which are present throughout the year in the plant. Community composition data confirm that the presence and abundance of bacteria in WWTPs is highly consistent at high taxonomic level. Our results indicate however a difference in microbial community structure between two groups of samples, identifying the summer holiday period as the break-point. Changes in the structure of the microbial community occur otherwise gradually, one month after another. Further studies will clarify how the size and diversity of the core microbiota could affect the observed dynamics.
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Qu Y, Zhang X, Shen W, Ma Q, You S, Pei X, Li S, Ma F, Zhou J. Illumina MiSeq sequencing reveals long-term impacts of single-walled carbon nanotubes on microbial communities of wastewater treatment systems. BIORESOURCE TECHNOLOGY 2016; 211:209-215. [PMID: 27017131 DOI: 10.1016/j.biortech.2016.03.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 03/04/2016] [Accepted: 03/08/2016] [Indexed: 06/05/2023]
Abstract
In this study, phenol wastewater treatment systems treated with different concentrations of single-walled carbon nanotubes (SWCNTs) (0-3.5g/L) were exposed to phenol and carbon nanotubes (CNTs) shock loadings to investigate the long-term impacts of SWCNTs on microbial communities. Phenol removal remained high efficiency (>98%) in SWCNTs-treated groups but decreased in non-treated group (85.1±1.9%) when exposed to high concentration of phenol (500mg/L). However, secondary dosing of SWCNTs in SWCNTs-treated groups would decrease the phenol removal efficiency. Illumina MiSeq sequencing revealed that the diversity, richness and structure of microbial communities were shifted under phenol shock loading, especially under high phenol concentration, but not under CNTs shock loading. In response to phenol and CNTs shock loadings, Rudaea, Burkholderia, Sphingomonas, Acinetobacter, Methylocystis and Thauera became dominant genera, which should be involved in phenol removal. These results suggested that a proper amount of SWCNTs might have positive effects on phenol wastewater treatment systems.
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Affiliation(s)
- Yuanyuan Qu
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xuwang Zhang
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Wenli Shen
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Qiao Ma
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Shengnan You
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xiaofang Pei
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Shuzhen Li
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Fang Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Jiti Zhou
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
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28
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Analysis of bacterial diversity of Chinese Luzhou-flavor liquor brewed in different seasons by Illumina Miseq sequencing. ANN MICROBIOL 2016. [DOI: 10.1007/s13213-016-1223-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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29
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Performance and microbial community composition in a long-term sequential anaerobic-aerobic bioreactor operation treating coking wastewater. Appl Microbiol Biotechnol 2016; 100:8191-202. [PMID: 27221291 DOI: 10.1007/s00253-016-7591-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 04/25/2016] [Accepted: 04/28/2016] [Indexed: 10/21/2022]
Abstract
The combined anaerobic-aerobic biosystem is assumed to consume less energy for the treatment of high strength industrial wastewater. In this study, pollutant removal performance and microbial diversity were assessed in a long-term (over 300 days) bench-scale sequential anaerobic-aerobic bioreactor treating coking wastewater. Anaerobic treatment removed one third of the chemical oxygen demand (COD) and more than half of the phenols with hydraulic retention time (HRT) of 42 h, while the combined system with total HRT of 114 h removed 81.8, 85.6, 99.9, 98.2, and 85.4 % of COD, total organic carbon (TOC), total phenols, thiocyanate, and cyanide, respectively. Two-dimensional gas chromatography with time-of-flight mass spectrometry showed complete removal of phenol derivatives and nitrogenous heterocyclic compounds (NHCs) via the combined system, with the anaerobic process alone contributing 58.4 and 58.6 % removal on average, respectively. Microbial activity in the bioreactors was examined by 454 pyrosequencing of the bacterial, archaeal, and fungal communities. Proteobacteria (61.2-93.4 %), particularly Betaproteobacteria (34.4-70.1 %), was the dominant bacterial group. Ottowia (14.1-46.7 %), Soehngenia (3.0-8.2 %), and Corynebacterium (0.9-12.0 %), which are comprised of phenol-degrading and hydrolytic bacteria, were the most abundant genera in the anaerobic sludge, whereas Thiobacillus (6.6-43.6 %), Diaphorobacter (5.1-13.0 %), and Comamonas (0.2-11.1 %) were the major degraders of phenol, thiocyanate, and NHCs in the aerobic sludge. Despite the low density of fungi, phenol degrading oleaginous yeast Trichosporon was abundant in the aerobic sludge. This study demonstrated the feasibility and optimization of less energy intensive treatment and the potential association between abundant bacterial groups and biodegradation of key pollutants in coking wastewater.
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30
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Metabarcoding of Bacteria Associated with the Acute Oak Decline Syndrome in England. FORESTS 2016. [DOI: 10.3390/f7050095] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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31
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Li P, Zuo J, Wang Y, Zhao J, Tang L, Li Z. Tertiary nitrogen removal for municipal wastewater using a solid-phase denitrifying biofilter with polycaprolactone as the carbon source and filtration medium. WATER RESEARCH 2016; 93:74-83. [PMID: 26897042 DOI: 10.1016/j.watres.2016.02.009] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 01/31/2016] [Accepted: 02/06/2016] [Indexed: 06/05/2023]
Abstract
Tertiary nitrogen removal technologies are needed to reduce the excess nitrogen that is discharged into sensitive aquatic ecosystems. An integrated solid-phase denitrification biofilter (SDNF) was developed with dual media to remove nitrate and suspended solids (SS) from the secondary effluent of municipal wastewater treatment plants. Biodegradable polymer pellets of polycaprolactone (PCL) served as the biofiltration medium and carbon source for denitrification. Long-term continuous operation of the SDNF was conducted with real secondary effluent to evaluate the denitrification performance and effects of influent nitrate loading rates (NLR) and operating temperatures. The results indicated that both nitrate and SS were effectively removed. The SDNF had a strong tolerance for fluctuations in influent NLR, and a maximum denitrification rate of 3.80 g N/(L·d) was achieved. The low temperature had a significant impact on nitrogen removal, yet the denitrification rate was still maintained at a relative high level to as much as 1.23 g N/(L·d) even at approximately 8.0 °C in winter. Nitrite accumulation and excessive organics residue in the effluent were avoided throughout the whole experiment, except on occasional days in the lag phase. The observed biomass yield was calculated to be 0.44 kgVSS/kgPCL. The microbial diversity and community structure of the biofilm in the SDNF were revealed by Illumina high-throughput sequencing. The special carbon source led to an obvious succession of microbial community from the initial inoculum (activated sludge from aerobic tanks), and included a decrease in microbial diversity and a shift in the dominant groups, which were identified to be members of the family Comamonadaceae in the SDNF. The SDNF developed in this study was verified to be an efficient technology for tertiary nitrogen removal from secondary effluent.
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Affiliation(s)
- Peng Li
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Jiane Zuo
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Yajiao Wang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Jian Zhao
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Lei Tang
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China
| | - Zaixing Li
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China
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32
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Lee SH, Choe H, Kim SG, Park DS, Nasir A, Kim BK, Kim KM. Complete genome of brown algal polysaccharides-degrading Pseudoalteromonas issachenkonii KCTC 12958(T) (=KMM 3549(T)). J Biotechnol 2016; 219:86-7. [PMID: 26732413 DOI: 10.1016/j.jbiotec.2015.12.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 12/17/2015] [Indexed: 10/22/2022]
Abstract
Pseudoalteromonas issachenkonii is a Gram-negative, rod-shaped, flagellated, aerobic, chemoorganotrophic marine bacterium that was isolated from the thallus of Fucus evanescens (marine brown macroalgae) sampled from the Kraternaya Bight of the Kurile Islands in the Pacific Ocean. Here, we report the complete genome of P. issachenkonii KCTC 12958(T) (=KMM 3549(T)=LMG 19697(T)=CIP 106858(T)), which consists of 4,131,541 bp (G+C content of 40.3%) with two chromosomes, 3538 protein-coding genes, 102 tRNAs and 8 rRNA operons. Several genes related to glycoside hydrolases, proteases, and bacteriolytic- and hemolytic activities were detected in the genome that help explain how the strain mediates degradation of algal cell wall and decomposes algal polysaccharides into industrially applicable products.
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Affiliation(s)
- Sang-Heon Lee
- Microbial Resource Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea; Department of Bioinformatics, University of Science and Technology, Daejeon, Republic of Korea
| | - Hanna Choe
- Microbial Resource Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Song-Gun Kim
- Microbial Resource Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Doo-Sang Park
- Microbial Resource Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
| | - Arshan Nasir
- Department of Biosciences, COMSATS Institute of Information Technology, Islamabad, Pakistan
| | | | - Kyung Mo Kim
- Microbial Resource Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea; Department of Bioinformatics, University of Science and Technology, Daejeon, Republic of Korea.
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Ma Q, Qu Y, Zhang X, Liu Z, Li H, Zhang Z, Wang J, Shen W, Zhou J. Systematic investigation and microbial community profile of indole degradation processes in two aerobic activated sludge systems. Sci Rep 2015; 5:17674. [PMID: 26657581 PMCID: PMC4675989 DOI: 10.1038/srep17674] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 11/03/2015] [Indexed: 01/26/2023] Open
Abstract
Indole is widely spread in various environmental matrices. Indole degradation by bacteria has been reported previously, whereas its degradation processes driven by aerobic microbial community were as-yet unexplored. Herein, eight sequencing batch bioreactors fed with municipal and coking activated sludges were constructed for aerobic treatment of indole. The whole operation processes contained three stages, i.e. stage I, glucose and indole as carbon sources; stage II, indole as carbon source; and stage III, indole as carbon and nitrogen source. Indole could be completely removed in both systems. Illumina sequencing revealed that alpha diversity was reduced after indole treatment and microbial communities were significantly distinct among the three stages. At genus level, Azorcus and Thauera were dominant species in stage I in both systems, while Alcaligenes, Comamonas and Pseudomonas were the core genera in stage II and III in municipal sludge system, Alcaligenes and Burkholderia in coking sludge system. In addition, four strains belonged to genera Comamonas, Burkholderia and Xenophilus were isolated using indole as sole carbon source. Burkholderia sp. IDO3 could remove 100 mg/L indole completely within 14 h, the highest degradation rate to date. These findings provide novel information and enrich our understanding of indole aerobic degradation processes.
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Affiliation(s)
- Qiao Ma
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Yuanyuan Qu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Xuwang Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Ziyan Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Huijie Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Zhaojing Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Jingwei Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Wenli Shen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, People's Republic of China
| | - Jiti Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, People's Republic of China
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Microbial Community Dynamics and Activity Link to Indigo Production from Indole in Bioaugmented Activated Sludge Systems. PLoS One 2015; 10:e0138455. [PMID: 26372223 PMCID: PMC4570806 DOI: 10.1371/journal.pone.0138455] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 08/31/2015] [Indexed: 12/02/2022] Open
Abstract
Biosynthesis of the popular dyestuff indigo from indole has been comprehensively studied using pure cultures, but less has been done to characterize the indigo production by microbial communities. In our previous studies, a wild strain Comamonas sp. MQ was isolated from activated sludge and the recombinant Escherichia colinagAc carrying the naphthalene dioxygenase gene (nag) from strain MQ was constructed, both of which were capable of producing indigo from indole. Herein, three activated sludge systems, G1 (non-augmented control), G2 (augmented with Comamonas sp. MQ), and G3 (augmented with recombinant E. colinagAc), were constructed to investigate indigo production. After 132-day operation, G3 produced the highest yields of indigo (99.5 ± 3.0 mg/l), followed by G2 (27.3 ± 1.3 mg/l) and G1 (19.2 ± 1.2 mg/l). The microbial community dynamics and activities associated with indigo production were analyzed by Illumina Miseq sequencing of 16S rRNA gene amplicons. The inoculated strain MQ survived for at least 30 days, whereas E. colinagAc was undetectable shortly after inoculation. Quantitative real-time PCR analysis suggested the abundance of naphthalene dioxygenase gene (nagAc) from both inoculated strains was strongly correlated with indigo yields in early stages (0–30 days) (P < 0.001) but not in later stages (30–132 days) (P > 0.10) of operation. Based on detrended correspondence analysis (DCA) and dissimilarity test results, the communities underwent a noticeable shift during the operation. Among the four major genera (> 1% on average), the commonly reported indigo-producing populations Comamonas and Pseudomonas showed no positive relationship with indigo yields (P > 0.05) based on Pearson correlation test, while Alcaligenes and Aquamicrobium, rarely reported for indigo production, were positively correlated with indigo yields (P < 0.05). This study should provide new insights into our understanding of indigo bio-production by microbial communities.
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