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Kaur H, Kalia A, Sandhu JS, Dheri GS, Kaur G, Pathania S. Interaction of TiO 2 nanoparticles with soil: Effect on microbiological and chemical traits. CHEMOSPHERE 2022; 301:134629. [PMID: 35447207 DOI: 10.1016/j.chemosphere.2022.134629] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 04/08/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
Titanium dioxide (TiO2) nanoparticles (NPs) are the most widely used nanomaterials and their expanding use raises concerns about their impacts on soil ecosystems and functioning. The present study evaluates the potential impacts of TiO2 NPs applied at low doses (0, 1.0, 2.5, 5.0, 10.0 and 20.0 mg L-1) on soil chemical properties including the macro and micronutrient contents, microbial population and enzyme activities in rhizosphere soil of mung bean crop at different time intervals (7, 14, 28 and 56 days). A quantitative RT-PCR study was also performed to study the relative change in the gene expression of ammonia oxidizer and nitrogen fixers upon TiO2 NP supplementation. An increase in soil nutrient content viz., available N, P, Cu, Fe, Mn, nitrate-N and ammonical-N was observed with NP application except available K and Zn content. The TiO2 NPs stimulated the growth of soil microflora at low concentrations while an inhibitory effect was recorded at high concentrations. The soil fungi and actinobacteria emerged as the most sensitive groups of soil microbes towards TiO2 NP exposure exhibiting detrimental impacts on their growth at all concentrations. Similarly, the soil enzyme activities enhanced till TiO2 NPs (10.0 mg L-1) which was followed by decrease at higher concentrations. The qRT-PCR study showed that the ammonia oxidizers were more affected by TiO2 NPs application than nitrogen fixers. These findings suggest that TiO2 NPs can be used as stimulators of soil nutrients and soil microbial dynamics at low concentrations.
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Affiliation(s)
- Harleen Kaur
- Department of Microbiology, College of Basic Sciences and Humanities, Punjab Agricultural University, Ludhiana, 141004, India
| | - Anu Kalia
- Electron Microscopy and Nanoscience Laboratory, Department of Soil Science, College of Agriculture, Punjab Agricultural University, Ludhiana, 141004, India.
| | - Jagdeep Singh Sandhu
- School of Agricultural Biotechnology, College of Agriculture, Punjab Agricultural University, Ludhiana, 141004, India
| | - Gurmeet Singh Dheri
- Department of Soil Science, College of Agriculture, Punjab Agricultural University, Ludhiana, 141004, India
| | - Gurwinder Kaur
- School of Agricultural Biotechnology, College of Agriculture, Punjab Agricultural University, Ludhiana, 141004, India
| | - Shivali Pathania
- School of Agricultural Biotechnology, College of Agriculture, Punjab Agricultural University, Ludhiana, 141004, India
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Li K, Qian J, Wang P, Wang C, Lu B, Tian X, Jin W, He X, Chen H, Zhang Y, Liu Y. Differential responses of encoding-amoA nitrifiers and nir denitrifiers in activated sludge to anatase and rutile TiO 2 nanoparticles: What is active functional guild in rate limiting step of nitrogen cycle? JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121388. [PMID: 31668758 DOI: 10.1016/j.jhazmat.2019.121388] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/26/2019] [Accepted: 10/02/2019] [Indexed: 06/10/2023]
Abstract
The long-terms effects of different crystal-composition TiO2 nanoparticles (NPs) on nitrogen-cycle-related functional guilds in activated sludge remain unclear, especially under natural light irradiation. Accordingly, activated sludge was exposed to anatase TiO2-NPs (TiO2-A) and rutile TiO2-NPs (TiO2-R) for up to 45 days. With markedly (p < 0.05) reducing nitrification-/denitrification-enzymatic-activities and abundances of ammonia-oxidizing-microorganisms (AOMs) and nitrite-reducing-bacteria (NRB), TiO2-NPs triggered bacteria and archaea UPGMA clustering and a deep modification of N-cycling functional diversity guided by crystal structure. in situ13C-DNA-SIP confirmed ammonia-oxidizing-bacteria (AOB) (Nitrosomonas and Nitrosospira) in original sludge as main active AOMs with 75.4 times more abundance than ammonia-oxidizing-archaea (AOA), while AOA within Nitrosopumilus and Nitrososphaera genera were the main active AOMs and tended to aggregate inside sludge after 10-mg/L TiO2-NPs exposure. Encoding-nirK NRB were more sensitive, while encoding-nirS Zoogloea with a total share of 4.97% to 14.93%, etc. were the main active NRB. AOB was more sensitive to TiO2-A, while TiO2-R showed the stronger toxicity to AOA and NRB resulting from differences in water environmental behaviors and crystal characteristics of two TiO2-NPs. This work expands understanding of the ecological risks of titanium-dioxide-crystal-NPs in aquatic environment and may help devise better methods to alleviate environmental stress caused by NPs at wastewater treatment plants.
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Affiliation(s)
- Kun Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Jin Qian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China.
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China.
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Bianhe Lu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Xin Tian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Wen Jin
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Xixian He
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Hao Chen
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Yuhang Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Yin Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, People's Republic of China; College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
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Wang Z, Zhang L, Zhang F, Jiang H, Ren S, Wang W, Peng Y. Nitrite accumulation in comammox-dominated nitrification-denitrification reactors: Effects of DO concentration and hydroxylamine addition. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121375. [PMID: 31629588 DOI: 10.1016/j.jhazmat.2019.121375] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/29/2019] [Accepted: 09/30/2019] [Indexed: 06/10/2023]
Abstract
In this study, nitrite accumulation was investigated under different DO conditions and different hydroxylamine addition methods during the domestic wastewater treatment. Two sequencing batch reactors in parallel were operated under cyclic aerobic and anoxic conditions with the DO concentration of 2.0 and 4.0 mg/L in aerobic phase. The nitrite accumulation rate during high DO conditions increased to 44.8 and 66.7% in 20 days. During hydroxylamine addition, the NAR increased over 90% under the continuous and intermittent hydroxylamine addition. Continuous hydroxylamine addition could result in a more efficient and rapid nitrite accumulation. The findings suggested that comammox could be the main reason for the failure of partial nitrification in a low DO environment (< 0.5 mg/L). The nitrogen variation during typical cycles showed that the continuous hydroxylamine addition suppressed the activity of NOB and the ammonia oxidation rate. Further, the qPCR results indicated that the abundance of comammox amoA (ranged from 6.25 × 107 to 4.16 × 108 copies/g VSS) was higher than those of AOB amoA and Nitrobacter in sludge samples. The findings from the current study may enrich our understanding of partial nitrification and its control strategy.
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Affiliation(s)
- Zhong Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Liang Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
| | - Fangzhai Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
| | - Hao Jiang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
| | - Shang Ren
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China
| | - Wei Wang
- College of Civil and Architectural Engineering, Heilongjiang Institute of Technology, Harbin, 150050, China
| | - Yongzhen Peng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China; National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing, 100124, China.
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Deng Z, Wang Z, Zhang P, Xia P, Ma K, Zhang D, Wang L, Yang Y, Wang Y, Chen S, Deng S. Effects of divalent copper on microbial community, enzymatic activity and functional genes associated with nitrification and denitrification at tetracycline stress. Enzyme Microb Technol 2019; 126:62-68. [DOI: 10.1016/j.enzmictec.2019.03.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/17/2019] [Accepted: 03/23/2019] [Indexed: 02/06/2023]
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Li K, Qian J, Wang P, Wang C, Fan X, Lu B, Tian X, Jin W, He X, Guo W. Toxicity of Three Crystalline TiO 2 Nanoparticles in Activated Sludge: Bacterial Cell Death Modes Differentially Weaken Sludge Dewaterability. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:4542-4555. [PMID: 30888807 DOI: 10.1021/acs.est.8b04991] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The eco-toxicities of different crystalline phases of TiO2-NPs are controversial, and the effects and mechanisms on activated sludge are unclear. Therefore, we assessed the acute-toxicities (8-h exposure) of P25, anatase, and rutile TiO2-NPs in activated sludge using flow cytometry under simulated sunlight (hereafter-sun) and evaluated the relationship between sludge dewatering and bacterial cell death modes using Pearson's correlation coefficients ( r). Additionally, the response of the microbial community structure was examined by high throughput sequencing. Bacterial survival and death were observed by confocal laser scanning microscopy. Toxicity indicators (e.g., lactate dehydrogenase (LDH) and reactive oxygen species (ROS)) were determined. Overall, TiO2-NPs toxicity was concentration-dependent and crystalline-phase-dependent. The responses of bacterial communities to crystalline phases were more obvious than that of dosage. P25-sun and anatase-sun caused necrosis-like cell death via strong photo-oxidation confirmed by 131%/123% (1 mg/L) and 301%/254% (50 mg/L) LDH released by the control, while rutile-sun induced apoptosis-like death via intracellular ROS production increased to 165% (1 mg/L) and 420% (50 mg/L) of the control. P25 and anatase NPs had higher protein and polysaccharide affinities, while rutile NPs exhibited stronger attachment onto phospholipids. TiO2-NPs-sun reduced activated sludge dewaterability. Specific resistance to filtration (SRF) showed the strongest positive correlation with tightly bound extracellular polymeric substances (EPS) and total soluble microbial byproducts ( r = 0.974, p < 0.01) and was closely related to EPS content and composition, especially the increased bound water (BW) content and sludge protein concentrations. High Pearson correlation coefficients were observed between early apoptotic cells and BW content ( r = 0.952, p < 0.01) resulting from massive polysaccharides and between necrotic (including late apoptotic) cells and SRF ( r = 0.959, p < 0.01) resulting from high protein and EPS concentrations. Thus, in response to TiO2-NPs, bacterial cell death modes differentially weakened sludge dewatering.
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Affiliation(s)
- Kun Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Jin Qian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Xiulei Fan
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Bianhe Lu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Xin Tian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Wen Jin
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Xixian He
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Wenzhou Guo
- College of Science , Hohai University , Nanjing , People's Republic of China , 210098
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Li N, Zeng W, Wang B, Li S, Guo Y, Peng Y. Nitritation, nitrous oxide emission pathways and in situ microbial community in a modified University of Cape Town process. BIORESOURCE TECHNOLOGY 2019; 271:289-297. [PMID: 30290321 DOI: 10.1016/j.biortech.2018.09.107] [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: 08/11/2018] [Revised: 09/19/2018] [Accepted: 09/20/2018] [Indexed: 06/08/2023]
Abstract
Achieving nitritation is a prerequisite to promote nutrients removal and save energy, but emission of nitrous oxide as a greenhouse gas cannot be ignored. This study established the nitritation in a continuous-flow MUCT process and investigated the mechanism of N2O generation. The nitrite accumulation ratio (NAR) reached 95% by controlling the low DO of 0.3-0.5 mg/L and short HRT of 8 h. The 15N-isotope tracer experiment indicated that the percentage of nitrifier-denitrification (ND) pathway increased by 12.7% under the limited-aeration mode, improving the stable operating of nitritation. Meanwhile, the autotrophic anammox pathway increased with the contribution ratio of 14.7% to N2 emission under the nitritation mode. The 15N-DNA-SIP revealed that the Nitrosomonas executed the ND pathway and the Planctomycetes conducted the anammox process, respectively. The integration of autotrophic and heterotrophic process based on nitritation technique has potential to solve the carbon-limited issue for total nitrogen removal in mainstream WWTPs.
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Affiliation(s)
- Ning Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China
| | - Wei Zeng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China.
| | - Baogui Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China
| | - Shuaishuai Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China
| | - Yu Guo
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China
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Pan KL, Gao JF, Fan XY, Li DC, Dai HH. The more important role of archaea than bacteria in nitrification of wastewater treatment plants in cold season despite their numerical relationships. WATER RESEARCH 2018; 145:552-561. [PMID: 30199800 DOI: 10.1016/j.watres.2018.08.066] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 08/24/2018] [Accepted: 08/30/2018] [Indexed: 05/04/2023]
Abstract
Nitrification failure of wastewater treatment plants (WWTPs) in cold season calls into investigations of the functional ammonia-oxidizing microorganisms (AOMs). In this study, we report the abundance of ammonia-oxidizing archaea (AOA), bacteria (AOB) and complete ammonia-oxidizing (comammox) Nitrospira in 23 municipal WWTPs in cold season, and explore the correlations between AOMs abundance and their relative contribution to nitrification. The copy numbers of AOA and AOB amoA gene ranged from 2.42 × 107 to 2.47 × 109 and 5.54 × 106 to 3.31 × 109 copies/g sludge, respectively. The abundance of amoA gene of Candidatus Nitrospira inopinata, an important strain of comammox Nitrospira, was stable with averaged abundance of 8.47 × 106 copies/g sludge. DNA-based stable isotope probing (DNA-SIP) assays were conducted with three typical WWTPs in which the abundance of AOA was lower than, similar to and higher than that of AOB, respectively. The results showed that considerable 13C-assimilation by AOA was detected during active nitrification in all WWTPs, whereas just a much lesser extent of 13C-incorporation by AOB and comammox Nitrospira was found in one WWTP. High-throughput sequencing with 13C-labeled DNA also showed the higher reads abundance of AOA than AOB and comammox Nitrospira. Nitrososphaera viennensis was the dominant active AOA, while Nitrosomonas oligotropha and Nitrosomonas europaea were identified as active AOB. The results obtained suggest that AOA, rather than AOB and comammox Nitrospira, dominate ammonia oxidation in WWTPs in cold season despite the numerical relationships of AOMs.
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Affiliation(s)
- Kai-Ling Pan
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
| | - Jing-Feng Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China.
| | - Xiao-Yan Fan
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
| | - Ding-Chang Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
| | - Hui-Hui Dai
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China
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Pan KL, Gao JF, Li HY, Fan XY, Li DC, Jiang H. Ammonia-oxidizing bacteria dominate ammonia oxidation in a full-scale wastewater treatment plant revealed by DNA-based stable isotope probing. BIORESOURCE TECHNOLOGY 2018; 256:152-159. [PMID: 29438915 DOI: 10.1016/j.biortech.2018.02.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 01/31/2018] [Accepted: 02/02/2018] [Indexed: 05/04/2023]
Abstract
A full-scale wastewater treatment plant (WWTP) with three separate treatment processes was selected to investigate the effects of seasonality and treatment process on the community structures of ammonia-oxidizing archaea (AOA) and bacteria (AOB). And then DNA-based stable isotope probing (DNA-SIP) was applied to explore the active ammonia oxidizers. The results of high-throughput sequencing indicated that treatment processes varied AOB communities rather than AOA communities. AOA slightly outnumbered AOB in most of the samples, whose abundance was significantly correlated with temperature. DNA-SIP results showed that the majority of AOB amoA gene was labeled by 13C-substrate, while just a small amount of AOA amoA gene was labeled. As revealed by high-throughput sequencing of heavy DNA, Nitrosomonadaceae-like AOB, Nitrosomonas sp. NP1, Nitrosomonas oligotropha and Nitrosomonas marina were the active AOB, and Nitrososphaera viennensis dominated the active AOA. The results indicated that AOB, not AOA, dominated active ammonia oxidation in the test WWTP.
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Affiliation(s)
- Kai-Ling Pan
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Jing-Feng Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China.
| | - Hong-Yu Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Xiao-Yan Fan
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Ding-Chang Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Hao Jiang
- Research Department of Microbiology, Allwegene Technology Co., Ltd, Beijing 102209, China
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Wang Z, Xia P, Gao M, Ma K, Deng Z, Wei J, Zhang J, Wang L, Zheng G, Yang Y, Chen J, Wang Y. Long-term effects of combined divalent copper and tetracycline on the performance, microbial activity and community in a sequencing batch reactor. BIORESOURCE TECHNOLOGY 2018; 249:916-923. [PMID: 29145118 DOI: 10.1016/j.biortech.2017.11.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 11/01/2017] [Accepted: 11/04/2017] [Indexed: 06/07/2023]
Abstract
The long-term effects of combined divalent copper (Cu(II)) and tetracycline (TC) on the performance, microbial activity and community in a sequencing batch reactor (SBR) were investigated. The addition of Cu(II), TC or mixed Cu(II)/TC caused the decrease of the organics and nitrogen removal efficiencies, and their decreased degrees were the lowest at the addition of mixed Cu(II)/TC. The increase of mixed Cu(II)/TC concentrations in the influent did not change the antagonistic effects between Cu(II) and TC on nitrifying and denitrifying activities. Nitrifiers had higher tolerances to Cu(II), TC and mixed Cu(II)/TC than denitrifiers. Compared to the addition of Cu(II) or TC alone, the microbial community richness was higher at the addition of mixed Cu(II)/TC, while the microbial community diversity was lower. The increased protein (PN) in extracellular polymeric substances (EPS) was a protective response of bacteria to Cu(II), TC and mixed Cu(II)/TC.
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Affiliation(s)
- Zichao Wang
- College of Environment and Chemical Engineering, Dalian University, Dalian, China.
| | - Pinghui Xia
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Mengchun Gao
- Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, China
| | - Kedong Ma
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Zhiwei Deng
- College of Environment and Chemical Engineering, Dalian University, Dalian, China; Liaoning Engineering Laboratory of Special Optical Functional Crystals, Dalian University, Dalian, China
| | - Junfeng Wei
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Jing Zhang
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Lin Wang
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Guoxia Zheng
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Yusuo Yang
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Jinbo Chen
- College of Environment and Chemical Engineering, Dalian University, Dalian, China
| | - Yuejing Wang
- Environmental Monitoring Center of Yantai, Yantai, China
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