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Wu L, Wu Q, Xu J, Rong L, Yu X, Cai C, Huang X, Zou X. Responses of antibiotic resistance genes in the enhanced biological phosphorus removal system under various antibiotics: Mechanisms and implications. Sci Total Environ 2023; 905:167247. [PMID: 37739079 DOI: 10.1016/j.scitotenv.2023.167247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/18/2023] [Accepted: 09/19/2023] [Indexed: 09/24/2023]
Abstract
The effects of antibiotics on the proliferation of antibiotic resistant genes (ARGs) in WWTPs have drawn great attention in recent years. The effects of antibiotics on ARGs in the enhanced biological phosphorus removal (EBPR) system and its mechanisms, however, are still not well understood. In this study, EBPR systems were constructed using activated sludge to investigate the effects of ten commonly detected antibiotics in the environment on the proliferation of ARGs and the mechanisms involved. The results showed that the total abundance of ARGs increased to varying degrees with the addition of different antibiotics (0.05 mmol/L), and the top 30 ARGs increased by 271.1 % to 370.0 %. Mobile genetic elements (MGEs), functional modules, and the bacteria community were consistently related to the changes in ARGs. Refractory antibiotics, in particular, have a stronger promoting effect on transduction in the EBPR system. The insertion sequence common region (ISCR) and transposon (Tnp) were identified as crucial factors in the proliferation of ARGs. Moreover, the risk of polyphosphate accumulating organisms (PAOs) carrying ARGs in the presence of antibiotics should not be ignored. Our findings emphasize the potential efficacy of employing strategies that target the reduction of MGEs, regulation of cellular communication, and management of microbial communities to effectively mitigate the risks associated with ARGs.
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Affiliation(s)
- Ligui Wu
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Qiaofeng Wu
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Fuzhou Urban and Rural Construction Group Co. Ltd, Fuzhou 350007, China
| | - Jingcheng Xu
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Lingling Rong
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Xiaoli Yu
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Chen Cai
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Xiangfeng Huang
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
| | - Xiaoming Zou
- School of Life Science, Jinggangshan University, Ji'an 343009, China.
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2
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Li C, Du X, Huang C, Zhang Z. Effects of High Pharmaceutical Concentrations in Domestic Wastewater on Membrane Bioreactor Treatment Systems: Performance and Microbial Community. Membranes (Basel) 2023; 13:650. [PMID: 37505016 PMCID: PMC10383461 DOI: 10.3390/membranes13070650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/01/2023] [Accepted: 07/04/2023] [Indexed: 07/29/2023]
Abstract
Despite pharmaceuticals being widely detected in water-bodies worldwide, what remain unclear are the effects of high pharmaceutical concentrations on the treatment efficiency of biological wastewater treatment processes, such as membrane bioreactor (MBR) systems. This study investigated the efficiency of MBR technology in the treatment of synthetic wastewater containing a mixture of five typical pharmaceuticals (ofloxacin, sulfamethoxazole, sulfamethylthiadiazole, carbamazepine and naproxen) with a total concentration of 500 µg/L. Both the control MBR (MBRc) without pharmaceutical dosing and the MBR operated with high influent pharmaceutical concentrations (MBRe) were operated under room temperature with the same hydraulic retention time of 11 h and the same sludge retention time of 30 d. The removal efficiency rates of total nitrogen and total phosphorus were 83.2% vs. 90.1% and 72.6% vs. 57.8% in the MBRc vs. MBRe systems, and both MBRs achieved >98% removal of organics for a 180-day period. The floc size decreased, and membrane fouling became more severe in the MBRe system. Microbial diversity increased in the MBRe system and the relative abundances of functional microbe differed between the two MBRs. Furthermore, the total relative abundances of genes involved in glycolysis, assimilating nitrate reduction and nitrification processes increased in the MBRe system, which could account for the higher organics and nitrogen removal performance. This work provides insights for MBR operation in wastewater treatment with high pharmaceutical concentrations.
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Affiliation(s)
- Chengyue Li
- Membrane & Nanotechnology-Enabled Water Treatment Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Guangdong Provincial Engineering Research Centre for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Xin Du
- Membrane & Nanotechnology-Enabled Water Treatment Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Guangdong Provincial Engineering Research Centre for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Chuyi Huang
- Membrane & Nanotechnology-Enabled Water Treatment Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Guangdong Provincial Engineering Research Centre for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Zhenghua Zhang
- Membrane & Nanotechnology-Enabled Water Treatment Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Guangdong Provincial Engineering Research Centre for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- School of Environment, Tsinghua University, Beijing 100084, China
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3
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Kong L, Shi X. Effect of antibiotic mixtures on the characteristics of soluble microbial products and microbial communities in upflow anaerobic sludge blanket. Chemosphere 2022; 292:133531. [PMID: 34995635 DOI: 10.1016/j.chemosphere.2022.133531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 12/13/2021] [Accepted: 01/02/2022] [Indexed: 06/14/2023]
Abstract
Two upflow anaerobic sludge blanket reactors (UASBs) were used to investigate the effects of three antibiotic mixtures (erythromycin, sulfamethoxazole, and tetracycline) on reactor performance, soluble microbial products (SMPs) composition and microbial community. One reactor (UASBantibiotics) was fed with antibiotic mixtures, whereas another reactor (UASBcontrol) was used as a control without the addition of antibiotic mixtures. Compared with those in UASBcontrol, UASBantibiotics show lower chemical oxygen demand removal efficiency and biogas content. A higher removal efficiency of antibiotic mixtures was obtained in first few stages in UASBantibiotics. The SMPs composition of effluent from the two reactors did not differ significantly, and the main components were protein-like substances, which produced higher fluorescence intensity in UASBantibiotics. Gas chromatography-mass spectrometry analysis revealed that the main compounds identified as SMPs (<580 Da) were alkanes, aromatics and esters, with only 20% similarity of SMPs between UASBantibiotics and UASBcontrol. Antibiotics had a significant effect on the microbial community structure. Notably, in UASBcontrol, hydrogenotrophic methanogens, key microorganisms in anaerobic digestion, had an obvious advantage at all stages compared with UASBantibiotics, whereas acetoclastic methanogen exhibited the opposite pattern. The above results demonstrated that antibiotic mixtures influenced the effluent quality during anaerobic treatment of synthetic wastewater, resulting in changes in the microbial community structure. This study clarified the effect of antibiotic mixtures on the operation of UASBs. It could contribute to identifying potential strategies for improving effluent quality in anaerobic treatment.
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Affiliation(s)
- Lingjiao Kong
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, School of Resource and Environmental Engineering, Anhui University, Hefei, 230601, China
| | - Xianyang Shi
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, School of Resource and Environmental Engineering, Anhui University, Hefei, 230601, China.
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4
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Yuan Q, Sui M, Qin C, Zhang H, Sun Y, Luo S, Zhao J. Migration, Transformation and Removal of Macrolide Antibiotics in The Environment: A Review. Environ Sci Pollut Res Int 2022; 29:26045-26062. [PMID: 35067882 DOI: 10.1007/s11356-021-18251-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Macrolide antibiotics (MAs), as a typical emerging pollutant, are widely detected in environmental media. When entering the environment, MAs can interfere with the growth, development and reproduction of organisms, which has attracted extensive attention. However, there are few reviews on the occurrence characteristics, migration and transformation law, ecotoxicity and related removal technologies of MAs in the environment. In this work, combined with the existing relevant research, the migration and transformation law and ecotoxicity characteristics of MAs in the environment are summarized, and the removal mechanism of MAs is clarified. Currently, most studies on MAs are based on laboratory simulation experiments, and there are few studies on the migration and transformation mechanism between multiphase states. In addition, the cost of MAs removal technology is not satisfactory. Therefore, the following suggestions are put forward for the future research direction. The migration and transformation process of MAs between multiphase states (such as soil-water-sediment) should be focused on. Apart from exploring the new treatment technology of MAs, the upgrading and coupling of existing MAs removal technologies to meet emission standards and reduce costs should also be concerned. This review provides some theoretical basis and data support for understanding the occurrence characteristics, ecotoxicity and removal mechanism of MAs.
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Affiliation(s)
- Qingjiang Yuan
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Meiping Sui
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Chengzhi Qin
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Hongying Zhang
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Yingjie Sun
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Siyi Luo
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Jianwei Zhao
- Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China.
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Huang R, Lan J, Zhan C, Ge Y, Zhao L. Interaction between β-lactam antibiotic and phosphorus-accumulating organisms. Environ Sci Pollut Res Int 2021; 28:42071-42081. [PMID: 33792847 DOI: 10.1007/s11356-021-13631-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 03/22/2021] [Indexed: 06/12/2023]
Abstract
β-Lactam antibiotics have been widely used in clinic due to strong antibacterial activity with mild adverse side effects and have been detected in the environment. In the enhanced biological phosphorus removal (EBPR) process, phosphorus-accumulating organisms (PAOs) play a major role. In this study, amoxicillin, aztreonam, and cefoperazone are the selected antibiotics that applied in investigating the interaction mechanism of β-lactam antibiotics and PAO. The effects of β-lactam antibiotics on PAOs were analyzed comprehensively from the aspects of antibiotic impacts on phosphorus removal rate, intracellular polymer, their toxicity to PAOs, and PAO impacts on the fate of β-lactam antibiotics. It was found that the phosphorus removal rate of PAO increased by 19.21% and 15.75%, respectively at 10 mg/L amoxicillin and aztreonam, while cefoperazone had certain inhibition effect on phosphorus removal efficiency. Quantitative analysis shows that in the aerobic stage, three kinds of β-lactam antibiotics could promote the synthesis of polyphosphates (poly-P). The degradation rates of three antibiotics were as follows: amoxicillin > aztreonam > cefoperazone. The fate characteristics of antibiotics provide a theoretical basis for environmental risk assessment. The toxic effects of three antibiotics were as follows: cefoperazone > aztreonam > amoxicillin according to the bacteriostatic test. It provided a scientific theoretical basis for systematically evaluating the biological toxicity of antibiotic pollutants.
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Affiliation(s)
- Rong Huang
- School of Environmental Science and Safety Engineering, Tianjin Key Laboratory of Hazardous Waste Safety Disposal and Recycling Technology, Tianjin University of Technology, Tianjin, 300384, China
| | - Jing Lan
- School of Environmental Science and Safety Engineering, Tianjin Key Laboratory of Hazardous Waste Safety Disposal and Recycling Technology, Tianjin University of Technology, Tianjin, 300384, China
| | - Chaoguo Zhan
- School of Environmental Science and Safety Engineering, Tianjin Key Laboratory of Hazardous Waste Safety Disposal and Recycling Technology, Tianjin University of Technology, Tianjin, 300384, China
- Guangzhou Harmony Environmental Engineering Co., Ltd, Guangzhou, 510700, China
| | - Yanhui Ge
- School of Environmental Science and Safety Engineering, Tianjin Key Laboratory of Hazardous Waste Safety Disposal and Recycling Technology, Tianjin University of Technology, Tianjin, 300384, China.
| | - Lin Zhao
- College of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China.
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6
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Wu L, Wei Q, Zhang Y, Fan Y, Li M, Rong L, Xiao X, Huang X, Zou X. Effects of antibiotics on enhanced biological phosphorus removal and its mechanisms. Sci Total Environ 2021; 774:145571. [PMID: 33611003 DOI: 10.1016/j.scitotenv.2021.145571] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 01/28/2021] [Accepted: 01/29/2021] [Indexed: 06/12/2023]
Abstract
Many kinds of antibiotics are continuously discharged into wastewater and typically cause a great decrease in sewage treatment performance, whereas mechanisms of differences in the impacts of commonly used antibiotics on phosphate removal are still elusive. Thus, an enhanced biological phosphorus removal (EBPR) system, as an effective method of phosphate removal, was developed, and its performance in the treatment of artificial wastewater containing antibiotics at short- (8 h) and long-term (15 days) exposure was investigated. The results show that phosphorus removal was consistently inhibited by the addition of antibiotics with a significant difference (P < 0.05). To interpret the phenomena, mechanistic equations were developed, and the results indicate that for short-term tests, the difference was mainly caused by the suppression of polyhydroxyalkanoate (PHA) degradation and the activity of polyphosphate kinase (PPK), resulting in the different inhibition of the soluble orthophosphorus (SOP) uptake process. For long-term tests, the difference in SOP uptake was principally caused by the inhibition of PHA degradation and the activity of PPK, whereas the difference in SOP release resulted from the inhibition of activities of exopolyphosphatase (PPX) and adenylate kinase (ADK). Moreover, micro-mechanisms of such inhibition were identified from molecular docking and electrostatic potential.
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Affiliation(s)
- Ligui Wu
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Quantao Wei
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Yingying Zhang
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Yuxing Fan
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Mi Li
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Lingling Rong
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Xiaoyu Xiao
- School of Life Science, Jinggangshan University, Ji'an 343009, China
| | - Xiangfeng Huang
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
| | - Xiaoming Zou
- School of Life Science, Jinggangshan University, Ji'an 343009, China; Ji'an Key Laboratory of Red Soil Improvement and Sustainable Utilization, Ji'an 343009, China.
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Zhu W, Bu F, Xu J, Wang Y, Xie L. Influence of lincomycin on anaerobic digestion: Sludge type, biogas generation, methanogenic pathway and resistance mechanism. Bioresour Technol 2021; 329:124913. [PMID: 33711716 DOI: 10.1016/j.biortech.2021.124913] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/21/2021] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
This study investigated the tolerance, defensive response and methanogenic pathways of anaerobic granular slugde and anaerobic suspended sludge (AGS and ASS) exposed to different LCM concentrations. AGS presented a higher tolerance to LCM stress, accompanied with 20.8 ± 2.6% enhancement in methane production at 1000 mg/L LCM, which was likely attributed to the less cell deaths and extracellular polymeric substances (EPSs) protection. In the acidification stage, acetate accumulation was stimulated and the activity of acetate kinase was promoted by LCM. In the methanogenesis stage, propionate and butyrate utilization for methane production were impaired after LCM addition. LCM also improved the activity of pyruvate-ferredoxin oxidoreductase and strengthened the process of hydrogenotrophic methanogenesis, likely by accelerating interspecies electron transfer mediated by hydrogen. ErmB and ermF were the dominate LCM resistance genes in AGS under LCM pressure conferring the resistance mechanism of ribosomal protection.
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Affiliation(s)
- Wenzhe Zhu
- Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
| | - Fan Bu
- Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
| | - Jun Xu
- Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
| | - Yipeng Wang
- Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
| | - Li Xie
- Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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Xing Y, Chen XD, Wang SP, Zhang ZQ, Liu X, Lu JS. Effect of minocycline on the changes in the sewage chemical index and microbial communities in sewage pipes. J Hazard Mater 2021; 402:123792. [PMID: 33254801 DOI: 10.1016/j.jhazmat.2020.123792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 08/11/2020] [Accepted: 08/18/2020] [Indexed: 06/12/2023]
Abstract
With the increasing use of drugs in cities, the sewer is becoming the most suitable place for antibiotic accumulation and transfer. In order to reveal the occurrence and fate of antibiotic sewage during pipeline migration, we used an anaerobic reactor device to simulate the concentration change of minocycline in the sewer and its impact on the sewage quality. The results showed that 90.8 % of minocycline was removed during sewer transportation. In the presence of minocycline, although the consumption of Chemical Oxygen Demand and total nitrogen in the sewage did not change significantly, the consumption rate of total phosphorus, nitrate nitrogen and the growth rate of ammonia nitrogen at the front end of the pipeline were decreased from 29.4 %, 86.3 %, 60.3 % to 3.7 %, 81.5 %, 18.3 % respectively. Minocycline inhibited the reduction of SO42-, while also reducing the production of H2S gas and increasing the release of CH4 gas. Moreover, the decline in the abundance of functional bacteria such as phosphorus accumulating organisms was consistent with the consumption of sewage nutrients. This experiment provides data support for the risk of wastewater leakage of medical and pharmaceutical wastewater into domestic sewage, and will helps to maintain the safe operation of actual sewage pipes.
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Affiliation(s)
- Yi Xing
- Environmental and Municipal Engineering Department, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, PR China
| | - Xing-du Chen
- Environmental and Municipal Engineering Department, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, PR China; Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, PR China; Key Laboratory of Environmental Engineering, Shaanxi Province, PR China
| | - She-Ping Wang
- Environmental and Municipal Engineering Department, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, PR China
| | - Zhi-Qiang Zhang
- Environmental and Municipal Engineering Department, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, PR China
| | - Xin Liu
- Environmental and Municipal Engineering Department, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, PR China
| | - Jin-Suo Lu
- Environmental and Municipal Engineering Department, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, PR China; Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, PR China; Key Laboratory of Environmental Engineering, Shaanxi Province, PR China.
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Dong X, He Y, Peng X, Jia X. Triclosan in contact with activated sludge and its impact on phosphate removal and microbial community. Bioresour Technol 2021; 319:124134. [PMID: 32966969 DOI: 10.1016/j.biortech.2020.124134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/09/2020] [Accepted: 09/12/2020] [Indexed: 06/11/2023]
Abstract
Triclosan (TCS) is applied in a wide range of pharmaceutical and personal care products to prevent or reduce bacterial growth. In this study, the effects of TCS on phosphate removal and bacterial community shifts of activated sludge, especially on functional bacteria variation, were investigated. Compared with the control group (R-control), the treatment group (R-TCS) with 100 μg/L TCS inhibited the microbial growth. In addition, the phosphorus removal efficiency of PO43--P and total phosphorus removal rates declined by 15.99% and 7.81%, respectively. Proteobacteria gradually dominated the microorganisms. The growths of Proteobacteria and Bacteroidetes were inhibited when 150 μg/L of TCS was added. Moreover, the differences in the microbial community structures of the R-control and R-TCS groups gradually expanded, no obvious difference was observed in the final stage, and the interrelationships of microbes in the latter weakened. The long-term addition of TCS impairs the growth of polyphosphate-accumulating organisms (PAOs).
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Affiliation(s)
- Xiaoqi Dong
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Yuzhe He
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Xingxing Peng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Xiaoshan Jia
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
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10
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Long S, Yang Y, Pavlostathis SG, Zhao L. Effect of sulfamethoxazole and oxytetracycline on enhanced biological phosphorus removal and bacterial community structure. Bioresour Technol 2021; 319:124067. [PMID: 33035865 DOI: 10.1016/j.biortech.2020.124067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/23/2020] [Accepted: 08/27/2020] [Indexed: 06/11/2023]
Abstract
The individual and combined effects of sulfamethoxazole (SMX) and oxytetracycline (OTC) on an enhanced biological phosphorus removal (EBPR) system was investigated. OTC at 5 mg/L resulted in filamentous bulking with a collapse of EBPR system. P removal decreased to 44.8% and COD was mostly removed during the aerobic phase. SMX and OTC had antagonistic effects in EBPR system. The inhibitory effect of SMX and SMX + OTC on P removal, COD removal, glycogen transformation and extracellular polymeric substances content was reversible with prolonged operation, accompanied with increase of polyphosphate accumulating organisms. The presence of nitrification inhibitor allylthiourea, high pH and low tetX abundance limited the removal of SMX and OTC. The bacterial community structure, antibiotic resistance genes abundances and genes functions were also investigated by metagenomic analysis. The results of this study offer insights into the individual and combined environmental risks of SMX and OTC, and their impact on EBPR.
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Affiliation(s)
- Sha Long
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0512, USA
| | - Yongkui Yang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Spyros G Pavlostathis
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0512, USA
| | - Lin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
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Chen H, Du M, Wang D, Zhou Y, Zeng L, Yang X. Influence of chlortetracycline as an antibiotic residue on nitrous oxide emissions from wastewater treatment. Bioresour Technol 2020; 313:123696. [PMID: 32570074 DOI: 10.1016/j.biortech.2020.123696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/10/2020] [Accepted: 06/13/2020] [Indexed: 06/11/2023]
Abstract
Strengthening the removal of antibiotics in wastewater treatment plants is a research focus, but whether antibiotics affect nitrous oxide (N2O) emissions from wastewater treatment remains to be determined. In this study, the effect of chlortetracycline (CTC) on N2O emissions in anaerobic/oxic/anoxic sequential batch reactors was investigated. Experimental results show that CTC promotes N2O emissions during biological nutrient removal. The addition of 0.1 mg/L CTC increased the N2O emission factor by 41.4% compared to the control. Mechanism exploration shows that CTC stimulates the release of extracellular polymeric substance (EPS) and binds to it, the generated EPS-CTC conjugates hinder or expand the mass transfer channel, which intensifies the electronic competition between oxidoreductases and the substrate competition between microorganisms, resulting in incomplete denitrification and nitrite accumulation, thereby increasing N2O emissions.
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Affiliation(s)
- Hongbo Chen
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China.
| | - Mingyang Du
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
| | - Yaoyu Zhou
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Long Zeng
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Xiao Yang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
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Gao R, Wu Z, Wang L, Liu J, Deng Y, Xiao Z, Fang J, Liang Y. Green Preparation of Fluorescent Nitrogen-Doped Carbon Quantum Dots for Sensitive Detection of Oxytetracycline in Environmental Samples. Nanomaterials (Basel) 2020; 10:E1561. [PMID: 32784490 DOI: 10.3390/nano10081561] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 07/31/2020] [Accepted: 08/02/2020] [Indexed: 11/17/2022]
Abstract
Nitrogen-doped carbon quantum dots (N-CQDs) with strong fluorescence were prepared by a one-step hydrothermal method using natural biomass waste. Two efficient fluorescent probes were constructed for selective and sensitive detection of oxytetracycline (OTC). The synthesized N-CQDs were characterized by UV-visible absorption spectra, fluorescence spectra, Fourier transform infrared spectroscopy (FT-IR), X-ray photon spectroscopy (XPS), atomic force microscopy (AFM), and high-resolution transmission electron microscopy (HRTEM), which proved that the synthesized N-CQDs surface were functionalized and had stable fluorescence performance. The basis of N-CQDs detection of OTC was discussed, and various reaction conditions were studied. Under optimized conditions, orange peel carbon quantum dots (ON-CQDs) and watermelon peel carbon quantum dots (WN-CQDs) have a good linear relationship with OTC concentrations in the range of 2-100 µmol L-1 and 0.25-100 µmol L-1, respectively. ON-CQDs and WN-CQDs were both successfully applied in detecting the OTC in pretreated tap water, lake water, and soil, with the recovery rate at 91.724-103.206%, and the relative standard deviation was less than 5.35%. The results showed that the proposed N-CQDs proved to be green and simple, greatly reducing the detection time for OTC in the determination environment.
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Zhao J, Xin M, Zhang J, Sun Y, Luo S, Wang H, Wang Y, Bi X. Diclofenac inhibited the biological phosphorus removal: Performance and mechanism. Chemosphere 2020; 243:125380. [PMID: 31760293 DOI: 10.1016/j.chemosphere.2019.125380] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/11/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
This work aims to evaluate the effect of new contaminant diclofenac (DCF) in sewage on the performance of Enhanced Biological Phosphorus Removal (EBPR) and its mechanism. The results showed that low-level DCF had no significant effect on EBPR. However, when the concentration of DCF was 2.0 mg/L, the removal efficiencies of chemical oxygen demand (COD), NH4+-N and soluble orthophosphate (SOP) decreased significantly to 71.2 ± 4.2%, 78.6 ± 2.9%, and 64.3 ± 4.2%, respectively. Mechanisms revealed that DCF promoted the ratio of protein to polysaccharide in activated sludge extracellular polymers and inhibited anaerobic phosphorus release and oxic phosphorus uptake. Intracellular polymer analysis showed that when the DCF content was 2.0 mg/L, the maximum content of polyhydroxyalkanoates (PHA) was only 2.5 ± 0.4 mmol-C/g VSS, which was significantly lower than that in the blank. Analysis of key enzyme activities indicated that the presence of DCF reduced the activities of exopolyphosphatase and polyphosphate kinase.
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Affiliation(s)
- Jianwei Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, PR China.
| | - Mingxue Xin
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, PR China
| | - Jing Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, PR China
| | - Yingjie Sun
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, PR China
| | - Siyi Luo
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China
| | - Huawei Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, PR China
| | - Yanan Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China; Qingdao Solid Waste Pollution Control and Resource Engineering Research Center, Qingdao, 266033, PR China
| | - Xuejun Bi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China
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Yu X, Meng Y, Yan Y, Jin X, Ni G, Peng J. Ethylenediamine functionalized MoS2 quantum dots for terramycin sensing in environmental water and fish samples. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104406] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Yang L, Wen Q, Zhao Y, Chen Z, Wang Q, Bürgmann H. New insight into effect of antibiotics concentration and process configuration on the removal of antibiotics and relevant antibiotic resistance genes. J Hazard Mater 2019; 373:60-66. [PMID: 30903957 DOI: 10.1016/j.jhazmat.2019.03.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 03/14/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
To compare the performance and antibiotic-resistance character in different process configurations under different levels of antibiotics, anoxic/oxic-membrane bioreactors (MBR) 1#, MBR2# and a sequencing batch reactor (SBR) were operated with identical operating parameters. MBR1# and SBR were operated under high and increasing levels of antibiotics, MBR2# received constant and low concentration of antibiotics. Microbiological community and antibiotic resistance genes (ARGs) were investigated using 16S rDNA gene high-throughput sequencing and qPCR. More than 90% of penicillin and chlortetracycline were removed due to strong hydrolysis, followed by sulfamethoxazole (69.27%-86.25%) through biodegradation and norfloxacin (28.66%-53.86%) through adsorption. Process configuration affected total nitrogen removal more, while antibiotics concentration affected total phosphorus removal more. MBR1# outperformed SBR in reducing sulfamethoxazole, norfloxacin and ARGs due to the retention effect of the membrane module. Retention efficiency of ARGs in MBRs increased along the operation. Compared to the operational taxonomic unit (OTU) number before antibiotics addition, the OTU number in MBR1# and SBR decreased by 23.7% and 28.7%, while that in MBR2# kept relatively stable. Process configuration contributed to higher dissimilarity of microbial community than antibiotics concentration. The research provides an insight into the influence factors of antibiotics-containing wastewater treatment.
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Affiliation(s)
- Lian Yang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, PR China
| | - Qinxue Wen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, PR China
| | - Yaqi Zhao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, PR China
| | - Zhiqiang Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, PR China; School of Civil Engineering, Lanzhou University of Technology, Lanzhou, 730070, PR China.
| | - Qiong Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, PR China
| | - Helmut Bürgmann
- Eawag Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Eawag, CH-6047, Switzerland
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Zhang X, Chen Z, Ma Y, Zhang N, Pang Q, Xie X, Li Y, Jia J. Response of Anammox biofilm to antibiotics in trace concentration: Microbial activity, diversity and antibiotic resistance genes. J Hazard Mater 2019; 367:182-187. [PMID: 30594718 DOI: 10.1016/j.jhazmat.2018.12.082] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 12/12/2018] [Accepted: 12/21/2018] [Indexed: 06/09/2023]
Abstract
Long-term impacts of two antibiotics-norfloxacin (NOR) and erythromycin (ERY) in trace concentration (1ug L-1) on Anammox biofilm were investigated. The specific Anammox activity (SAA) and dehydrogenase activity (DHA) of Anammox biofilm were detected by batch experiments, the microbial diversity was analyzed using high-throughput sequencing technology and the antibiotic resistance genes (ARGs) were measured by qPCR. Results showed that long-term NOR feeding decreased 30% SAA and 39.6% DHA, and also decreased the abundance of the OTUs related to autotrophic nitrogen removal, while ERY had slight impact on Anammox. Only two ARGs targeted to ERY (ermB, mphA) were detected in the two Anammox systems while those targeted to NOR (qnrA, qnrB, qnrD, and qnrS) were not detected. The relative expression of ermB to 16S rRNA increased from 2.08±0.32×10-4 to 3.53±1.18×10-4, and that of mphA increased to 5.00±0.48×10-4 from 4.48±1.32×10-5. The induced ARGs in the Anammox system help it resist the ERY shock.
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Affiliation(s)
- Xiaojing Zhang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
| | - Zhao Chen
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Yongpeng Ma
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Nan Zhang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Qi Pang
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Xuyang Xie
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Yingzhe Li
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Jinping Jia
- Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Zhang X, Chen Z, Ma Y, Chen T, Zhang J, Zhang H, Zheng S, Jia J. Impacts of erythromycin antibiotic on Anammox process: Performance and microbial community structure. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2018.12.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Liu H, Yang Y, Sun H, Zhao L, Liu Y. Effect of tetracycline on microbial community structure associated with enhanced biological N&P removal in sequencing batch reactor. Bioresour Technol 2018; 256:414-420. [PMID: 29477079 DOI: 10.1016/j.biortech.2018.02.051] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 02/09/2018] [Accepted: 02/10/2018] [Indexed: 06/08/2023]
Abstract
The presence of antibiotics in wastewater has raised serious concerns about its potential impacts on biological nitrogen and phosphorus (N&P) removal. This study investigated the long-term process performance and microbial structures in response to tetracycline in the enhanced N&P removal process. Results showed that trace tetracycline (20 and 50 μg/L) had no obvious effect on the N&P removal, while the relative abundances of Nitrospira and poly-phosphate accumulating organisms (PAOs) were found to increase. Moreover, the decreased abundance of ammonia oxidizing bacteria (AOB) was observed. When the tetracycline concentrations were further increased to 2 and 5 mg/L, initially the N&P removal was seriously inhibited, but gradually recovered with the restored abundances of Nitrospira and PAOs. However, AOB, Nitrobacter and denitrifiers were found to be more vulnerable to high-concentration tetracycline with slow activity recovery. Consequently, this study offered useful information about long-term microbial responses to tetracycline in enhanced biological nutrient removal process.
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Affiliation(s)
- Hang Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore; School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Yongkui Yang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Huifang Sun
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Lin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Yu Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
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Wen Q, Yang L, Zhao Y, Huang L, Chen Z. Insight into effects of antibiotics on reactor performance and evolutions of antibiotic resistance genes and microbial community in a membrane reactor. Chemosphere 2018; 197:420-429. [PMID: 29366956 DOI: 10.1016/j.chemosphere.2018.01.067] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 01/03/2018] [Accepted: 01/14/2018] [Indexed: 06/07/2023]
Abstract
A lab-scale anoxic/oxic-membrane bioreactor was designed to treat antibiotics containing wastewater at different antibiotics concentrations (0.5 mg/L, 1 mg/L and 3 mg/L of each antibiotic). Overall COD and NH4+N removal (more than 90%) were not affected during the exposure to antibiotics and good TN removal was also achieved, while TP removal was significantly affected. The maximum removal efficiency of penicillin and chlorotetracycline reached 97.15% and 96.10% respectively due to strong hydrolysis, and sulfamethoxazole reached 90.07% by biodegradation. However, 63.87% of norfloxacin maximum removal efficiency was achieved mainly by sorption. The system had good ability to reduce ARGs, peaking to more than 4 orders of magnitude, which mainly depended on the biomass retaining of the membrane module. Antibiotics concentration influenced the evolution of ARGs and bacterial communities in the reactor. This research provides great implication to reduce ARGs and antibiotics in antibiotics containing wastewater using A/O-MBR.
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Affiliation(s)
- Qinxue Wen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, PR China
| | - Lian Yang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, PR China
| | - Yaqi Zhao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, PR China
| | - Long Huang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, PR China
| | - Zhiqiang Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, 150090, PR China; School of Civil Engineering, Lanzhou University of Technology, Lanzhou, 730070, PR China.
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Hu Z, Sun P, Han J, Wang R, Jiao L, Yang P, Cai J. The acute effects of erythromycin and oxytetracycline on enhanced biological phosphorus removal system: shift in bacterial community structure. Environ Sci Pollut Res Int 2018; 25:9342-9350. [PMID: 29344916 DOI: 10.1007/s11356-018-1221-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 01/03/2018] [Indexed: 06/07/2023]
Abstract
Since extensive application, an increasing amount of antibiotics has been released into wastewater treatment plants. In this study, the enhanced biological phosphorus removal (EBPR) system was fed with synthetic wastewater containing erythromycin (ERY) and oxytetracycline (OTC) for 7 days to evaluate the variations of solution ortho-P (SOP), volatile fatty acid (VFA), poly-bhydroxyalkanoates (PHAs), specific oxygen uptake rater (SOUR), and microbial community in the EBPR system. The obtained results showed that the P-removal efficiency decreased to 0.0%, and at the end of the experiment, only less than 20% of the VFA could be consumed. Besides, the variable processes of P and PHAs were destroyed. Moreover, to better grasp the inhibitory mechanism of antibiotics, microbial community compositions of activated sludge sampled in all reactors were investigated by high-throughput sequencing techniques. Results of comparative and evolutionary analysis revealed that high concentrations (5 and 10 mg/L) of ERY and OTC could seriously shift microbial communities, while combined antibiotics could induce more. Additionally, Accumulibacter and Competibacter were two primary microorganisms at the genus level in the EBPR system. Accumulibacter decreased seriously for exposure to antibiotics, while Competibacter increased in all experimental reactors especially in combined antibiotics reactor.
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Affiliation(s)
- Zhetai Hu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Peide Sun
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
| | - Jingyi Han
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Ruyi Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Liang Jiao
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Pengfei Yang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Jing Cai
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
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Hu Z, Lu X, Sun P, Hu Z, Wang R, Lou C, Han J. Understanding the performance of microbial community induced by ZnO nanoparticles in enhanced biological phosphorus removal system and its recoverability. Bioresour Technol 2017; 225:279-285. [PMID: 27898318 DOI: 10.1016/j.biortech.2016.11.080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 11/18/2016] [Accepted: 11/19/2016] [Indexed: 06/06/2023]
Abstract
In this study, the impacts of ZnO Nanoparticles (NPs) on the microbial community in enhanced biological phosphorus removal (EBPR) system and its recoverability were investigated. High-throughput sequencing was applied to study the microbial community shift. Results show that the species richness in the EBPR system was reduced under the condition of ZnO NPs with high concentration (above 6mg/L). Evolution analysis suggests that higher concentration ZnO NPs induced more microbial community shift. According to the analysis on genus level, Competibacter was more impressionable than Accumulibacter after exposure to 2mg/L ZnO NPs. Nonetheless, this phenomenon could not be found as the concentration of ZnO NPs got higher (above 6mg/L). Accumulibacter could reach to the initial level after recover for 20days, whereas Competibacter could not recover even when the concentration of ZnO NPs was only 2mg/L. Interestingly, although the phosphorus removal (P-removal) process was re-achieved, the microbial community in reactors was irreversible.
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Affiliation(s)
- Zhetai Hu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Xuanyu Lu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Peide Sun
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China.
| | - Zhirong Hu
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China; GL Environment Inc, Hamilton, Canada
| | - Ruyi Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Chengke Lou
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Jingyi Han
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
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