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Liu W, Sun C, Ren Z, Hao S, Chen Z, Li T, Wen X. Long-term occurrence, resistance risk and chaotic characteristics of antibiotic resistance genes in sludge anaerobic digestion system. BIORESOURCE TECHNOLOGY 2024; 394:130267. [PMID: 38154733 DOI: 10.1016/j.biortech.2023.130267] [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: 11/07/2023] [Revised: 12/08/2023] [Accepted: 12/25/2023] [Indexed: 12/30/2023]
Abstract
The long-term occurrence, dynamics and risk of antibiotic resistance genes (ARGs) in anaerobic digestion (AD) of excess sludge (ES) are not fully understood. Therefore, 13-month metagenomic monitoring was carried out in a full-scale AD plant. The highest ARG abundance and risk scores were observed in spring. AD achieved a 35 % removal rate for the total ARG abundance, but the risk score of AD sludge was not always lower than ES samples, because of the higher proportion of Rank I ARGs in AD sludge. ARGs showed less obvious patterns under linear models compared with microbial community, implying their chaotic dynamics, which was further confirmed by nonlinearity tests. Empirical dynamic modeling performed better than the autoregressive integrated moving average model for ARG dynamics, especially for those with simple and nonlinear dynamics. This study highlighted spring for its higher ARG abundance and risk, and recommended nonlinear models for revealing the dynamics of ARGs.
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Affiliation(s)
- Wei Liu
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Chenxiang Sun
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Zhengran Ren
- Research and Development Center, Beijing Drainage Group Co. Ltd., Beijing 100080, China
| | - Shan Hao
- Research and Development Center, Beijing Drainage Group Co. Ltd., Beijing 100080, China
| | - Zhan Chen
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Tianle Li
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Xianghua Wen
- School of Environment, Tsinghua University, Beijing 100084, China.
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Fu J, Zhao Y, Yao Q, Addo-Bankas O, Ji B, Yuan Y, Wei T, Esteve-Núñez A. A review on antibiotics removal: Leveraging the combination of grey and green techniques. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156427. [PMID: 35660594 DOI: 10.1016/j.scitotenv.2022.156427] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 05/25/2022] [Accepted: 05/30/2022] [Indexed: 05/27/2023]
Abstract
Antibiotics are currently a major source of concern around the world due to the serious risks posed to human health and the environment. The performance of the secondary wastewater treatment processes/technologies (representing grey process) and constructed wetlands (CWs) (typical green process) in removing antibiotics and antibiotic resistance genes (ARG) was reviewed. The result showed that the grey process mainly removes antibiotics, but does not significantly remove ARG, and some processes may even cause ARG enrichment. The overall treatment in CWs is better than WWTPs, especially for ARG. Vertical subsurface flow CWs (VFCWs) are more conductive to antibiotics removal, while horizontal subsurface flow CWs (HFCWs) have a better ARG removal. More importantly, this review admits and suggests that the combination of grey process with green process is an effective strategy to remove antibiotics and ARG. The most advantage of the combination lies in realizing complementary advantages, i.e. the grey process as the primary treatment while CWs as the polishing stage. The efficiency of such the hybrid system is much higher than either single treatment process.
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Affiliation(s)
- Jingmiao Fu
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, PR China; Department of Municipal and Environmental Engineering, Faculty of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi'an 710048, PR China
| | - Yaqian Zhao
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, PR China; Department of Municipal and Environmental Engineering, Faculty of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi'an 710048, PR China.
| | - Qi Yao
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, PR China
| | - Olivia Addo-Bankas
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, PR China; Department of Municipal and Environmental Engineering, Faculty of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi'an 710048, PR China
| | - Bin Ji
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, PR China
| | - Yujie Yuan
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, PR China
| | - Ting Wei
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, PR China; Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcalá, Madrid, Spain
| | - Abraham Esteve-Núñez
- State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, PR China; Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcalá, Madrid, Spain; Bioelectrogenesis Group, IMDEA WATER, Madrid, Spain.
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3
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Grehs BWN, Linton MAO, Clasen B, de Oliveira Silveira A, Carissimi E. Antibiotic resistance in wastewater treatment plants: understanding the problem and future perspectives. Arch Microbiol 2020; 203:1009-1020. [PMID: 33112995 DOI: 10.1007/s00203-020-02093-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 10/02/2020] [Accepted: 10/13/2020] [Indexed: 11/26/2022]
Abstract
Antibiotics residues (AR), antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARG) are a new class of water contaminants, due to their adverse effects on aquatic ecosystems and human health. Contamination of water bodies occurs mainly by the excretion of antibiotics incompletely metabolized by humans and animals and is considered the main source of contamination of antibiotics in the environment. Given the imminent threat, the World Health Organization (WHO) has categorized the spread of antibiotics as one of the top three threats to public health in the twenty-first century. The Urban Wastewater Treatment Plants (UWWTP) bring together AR, ARB, ARG, making the understanding of this peculiar environment fundamental for the investigation of technologies aimed at combating the spread of bacterial resistance. Several methodologies have been employed focusing on reducing the ARB and ARG loads of the effluents, however the reactivation of these microorganisms after the treatment is widely reported. This work aims to elucidate the role of UWWTPs in the spread of bacterial resistance, as well as to report the efforts that have been made so far and future perspectives to combat this important global problem.
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Affiliation(s)
- Bárbara W N Grehs
- Department of Sanitary and Environmental Engineering, Federal University of Santa Maria (UFSM), Av. Roraima 1000, CT Lab, Santa Maria, RS, 97105-900, Brazil
| | - Maria A O Linton
- Department of Biology, Federal University of Santa Maria (UFSM), Av. Roraima 1000, CE, Santa Maria, RS, 97105-900, Brazil
| | - Barbara Clasen
- Department of Sanitary and Environmental Engineering, Federal University of Santa Maria (UFSM), Av. Roraima 1000, CT Lab, Santa Maria, RS, 97105-900, Brazil.
- Department of Environmental Science, State University of Rio Grande Do Sul (UERGS), R. Cipriano Barata, 211, Três Passos, RS, 98600-000, Brazil.
| | - Andressa de Oliveira Silveira
- Department of Sanitary and Environmental Engineering, Federal University of Santa Maria (UFSM), Av. Roraima 1000, CT Lab, Santa Maria, RS, 97105-900, Brazil
| | - Elvis Carissimi
- Department of Sanitary and Environmental Engineering, Federal University of Santa Maria (UFSM), Av. Roraima 1000, CT Lab, Santa Maria, RS, 97105-900, Brazil
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Sanderson H, Ortega-Polo R, McDermott K, Hall G, Zaheer R, Brown RS, Majury A, McAllister TA, Liss SN. Quantification and Multidrug Resistance Profiles of Vancomycin-Resistant Enterococci Isolated from Two Wastewater Treatment Plants in the Same Municipality. Microorganisms 2019; 7:microorganisms7120626. [PMID: 31795349 PMCID: PMC6956375 DOI: 10.3390/microorganisms7120626] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 11/23/2019] [Accepted: 11/25/2019] [Indexed: 11/16/2022] Open
Abstract
Wastewater treatment plants (WWTPs) are points of control for the environmental dissemination of antimicrobial resistant bacteria. Vancomycin-resistant enterococci (VRE) were used as indicators of antimicrobial resistance (AMR) in two WWTPs (biologically aerated filter (BAF) and conventional activated sludge (CAS)) in the same municipality. The removal and abundance of enterococci and VRE as well as the species and antimicrobial resistance profiles of VRE were assessed. Enterococci and VRE from the primary and final effluents were enumerated. Results were assessed from an ecological context. VRE was not selected for by either WWTP but the BAF system outperformed the CAS system for the removal of enterococci/VRE. Enterococcus faecalis (n = 151), E. faecium (n = 94) and E. casseliflavus/E. gallinarum (n = 59) were the dominant VRE species isolated. A decrease in levofloxacin resistance in enterococci was observed in the BAF WWTP. An increase in nitrofurantoin resistant (p < 0.001) and a decrease in quinupristin/dalfopristin (p = 0.003) and streptomycin (p = 0.022) resistant enterococci were observed in the CAS WWTP, corresponding to a shift of VRE from E. faecalis to E. faecium. Wastewater treatment processes can be managed to limit the dissemination of antimicrobial resistance determinants into the surrounding environment.
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Affiliation(s)
- Haley Sanderson
- School of Environmental Studies, Queen’s University, Kingston, ON K7L 3N6, Canada; (H.S.); (G.H.); (R.S.B.); (A.M.)
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, AB T1J 4B1, Canada; (R.O.-P.); (R.Z.)
| | - Rodrigo Ortega-Polo
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, AB T1J 4B1, Canada; (R.O.-P.); (R.Z.)
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 6T5, Canada
| | | | - Geoffrey Hall
- School of Environmental Studies, Queen’s University, Kingston, ON K7L 3N6, Canada; (H.S.); (G.H.); (R.S.B.); (A.M.)
- Department of Civil Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada
| | - Rahat Zaheer
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, AB T1J 4B1, Canada; (R.O.-P.); (R.Z.)
| | - R. Stephen Brown
- School of Environmental Studies, Queen’s University, Kingston, ON K7L 3N6, Canada; (H.S.); (G.H.); (R.S.B.); (A.M.)
- Department of Chemistry, Queen’s University, Kingston, ON K7L 3N6, Canada
| | - Anna Majury
- School of Environmental Studies, Queen’s University, Kingston, ON K7L 3N6, Canada; (H.S.); (G.H.); (R.S.B.); (A.M.)
- Public Health Ontario, Kingston, ON K7L 3K3, Canada;
| | - Tim A. McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, AB T1J 4B1, Canada; (R.O.-P.); (R.Z.)
- Correspondence: (T.A.M.); (S.N.L.)
| | - Steven N. Liss
- School of Environmental Studies, Queen’s University, Kingston, ON K7L 3N6, Canada; (H.S.); (G.H.); (R.S.B.); (A.M.)
- Department of Biology, Ryerson University, Toronto, ON M5B 2K3, Canada
- Correspondence: (T.A.M.); (S.N.L.)
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Immobilised Cerium-Doped Zinc Oxide as a Photocatalyst for the Degradation of Antibiotics and the Inactivation of Antibiotic-Resistant Bacteria. Catalysts 2019. [DOI: 10.3390/catal9030222] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The threat of antibiotic resistance to the wellbeing of societies is well established. Urban wastewater treatment plants (UWTPs) are recognised sources for antibiotic resistance dissemination in the environment. Herein a novel cerium-doped zinc oxide (Ce-ZnO) photocatalyst is compared to ZnO and the benchmark TiO2-P25 in the immobilised form on a metallic support, to evaluate a photocatalytic process as a possible tertiary treatment in UWTPs. The catalysts were compared for the removal of two antibiotics, trimethoprim (TMP) and sulfamethoxazole (SMX), and for the inactivation of Escherichia coli (E. coli) strain DH5-Alpha in isotonic sodium chloride solution and of autochthonous bacteria in real secondary wastewater. In real wastewater, E. coli and other coliforms were monitored, as well as the respective fractions resistant to ofloxacin and azithromycin. In parallel, Pseudomonas aeruginosa and the respective sub-population resistant to ofloxacin or ciprofloxacin were also monitored. Photocatalysis with both ZnO and Ce-ZnO was faster than using TiO2-P25 at degrading the antibiotics, with Ce-ZnO the fastest against SMX but slower than undoped ZnO in the removal of TMP. Ce-ZnO catalyst reuse in the immobilised form produced somewhat slower kinetics maintained >50% of the initial activity, even after five cycles of use. Approximately 3 log10 inactivation of E. coli in isotonic sodium chloride water was recorded with reproducible results. In the removal of autochthonous bacteria in real wastewater, Ce-ZnO performed better (more than 2 log values higher) than TiO2-P25. In all cases, E. coli and other coliforms, including their resistant subpopulations, were inactivated at a higher rate than P. aeruginosa. With short reaction times no evidence for enrichment of resistance was observed, yet with extended reaction times low levels of bacterial loads were not further inactivated. Overall, Ce-ZnO is an easy and cheap photocatalyst to produce and immobilise and the one that showed higher activity than the industry standard TiO2-P25 against the tested antibiotics and bacteria, including antibiotic-resistant bacteria.
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Li R, Jay JA, Stenstrom MK. Fate of antibiotic resistance genes and antibiotic-resistant bacteria in water resource recovery facilities. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:5-20. [PMID: 30682226 DOI: 10.1002/wer.1008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 09/19/2018] [Accepted: 09/24/2018] [Indexed: 06/09/2023]
Abstract
Many important diseases are showing resistance to commonly used antibiotics, and the resistance is potentially caused by widespread use of antibiotics for maintaining human health and improving food production. Antibiotic resistance genes (ARGs) and antibiotic-resistant bacteria (ARB) are associated with this increase, and their fate in water resource recovery facilities is an important, emerging area of research. This literature review summarizes current findings of worldwide research on the fate of ARB and ARGs in various types of treatment plants. Twenty-five published studies were reviewed which contained 215 observations in activated sludge, membrane bioreactors, anaerobic digestion, constructed wetlands, coagulation-filtration, and three types of disinfection. We found 70% decreased observations, 18% increased observations, and 12% unchanged observations of all observations in all treatment processes. Resistance genes to tetracycline were most often observed, but more studies are needed in other antibiotic resistance genes. The causes for increased abundance of ARGs and ARB are not well understood, and further studies are warranted. PRACTITIONER POINTS: Antibiotic resistance is increasing with concern that treatment plants may acclimate bacteria to antibiotics. A literature survey found 215 resistance observations with 70% decreased, 18% increased, 12% unchanged after treatment. The type of treatment process is important with activated sludge showing the greatest reductions.
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Affiliation(s)
- Renjie Li
- University of California Los Angeles, Los Angeles, California
| | - Jennifer A Jay
- University of California Los Angeles, Los Angeles, California
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7
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Li H, Song HL, Yang XL, Zhang S, Yang YL, Zhang LM, Xu H, Wang YW. A continuous flow MFC-CW coupled with a biofilm electrode reactor to simultaneously attenuate sulfamethoxazole and its corresponding resistance genes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 637-638:295-305. [PMID: 29751310 DOI: 10.1016/j.scitotenv.2018.04.359] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2017] [Revised: 04/12/2018] [Accepted: 04/26/2018] [Indexed: 05/12/2023]
Abstract
A continuous flow microbial fuel cell constructed wetland (MFC-CW) coupled with a biofilm electrode reactor (BER) system was constructed to remove sulfamethoxazole (SMX). The BER unit powered by the stacked MFC-CWs was used as a pretreatment unit, and effluent flowed into the MFC-CW for further degradation. The experimental results indicated that the removal rate of 2 or 4 mg/L SMX in a BER unit was nearly 90%, and the total removal rate in the coupled system was over 99%. As the hydraulic retention time (HRT) was reduced from 16 h to 4 h, the SMX removal rate in the BER decreased from 75% to 48%. However, the total removal rate in the coupled system was still over 97%. The maximum SMX removal rate in the MFC-CW, which accounted for 42%-55% of the total removal, was obtained in the anode layer. In addition, the relative abundances of sul genes detected in the systems were in the order of sulI > sulII > sulIII, and significant positive correlations of sul gene copy numbers versus SMX concentration and 16S rRNA gene copy numbers were observed. Furthermore, significant negative correlations were identified between sul genes, 16S rRNA gene copy numbers, and HRT. The abundances of the sul genes in the effluent of the MFC-CW were lower than the abundances observed in the BER effluent. High-throughput sequencing revealed that the microbial community diversity of the BER was affected by running time, power supply forms and HRT. Bio-electricity from the MFC-CW may reduce microbial community diversity and contribute to reduction of the antibiotic resistance gene (ARG) abundance in the BER. Taken together, the BER-MFC-CW coupled system is a potential tool to treat wastewater containing SMX and attenuate corresponding ARG abundance.
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Affiliation(s)
- Hua Li
- School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Hai-Liang Song
- School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Engineering Lab of Water and Soil Eco-remediation, Wenyuan Road 1, Nanjing 210023, China.
| | - Xiao-Li Yang
- School of Civil Engineering, Southeast University, Nanjing 210096, China.
| | - Shuai Zhang
- School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Yu-Li Yang
- School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Engineering Lab of Water and Soil Eco-remediation, Wenyuan Road 1, Nanjing 210023, China; School of Civil Engineering, Southeast University, Nanjing 210096, China; Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA
| | - Li-Min Zhang
- School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Engineering Lab of Water and Soil Eco-remediation, Wenyuan Road 1, Nanjing 210023, China.
| | - Han Xu
- School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Ya-Wen Wang
- School of Environment, Nanjing Normal University, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Engineering Lab of Water and Soil Eco-remediation, Wenyuan Road 1, Nanjing 210023, China
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8
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The Effect of Primary, Secondary, and Tertiary Wastewater Treatment Processes on Antibiotic Resistance Gene (ARG) Concentrations in Solid and Dissolved Wastewater Fractions. WATER 2018. [DOI: 10.3390/w10010037] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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9
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Lamba M, Ahammad SZ. Performance comparison of secondary and tertiary treatment systems for treating antibiotic resistance. WATER RESEARCH 2017; 127:172-182. [PMID: 29049966 DOI: 10.1016/j.watres.2017.10.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 10/10/2017] [Accepted: 10/11/2017] [Indexed: 05/21/2023]
Abstract
Rapid emergence of antibiotic resistance (AR) in developing countries is posing a greater health risk and increasing the global disease burden. AR proliferation mediated by treated/untreated discharges from sewage treatment plants (STPs) is a prime public health concern. Efficient sewage treatment is among our key defenses against the dissemination of infectious diseases. The present study aims to estimate the efficiency of aerobic [activated sludge process (ASP) and modified trickling filter (MTF)] and anaerobic reactors (anaerobic flow-through reactor) along with the three disinfection techniques (UV, ozone and chlorination) in reducing ARB and ARGs present in the domestic sewage. The three treatment systems were operated at different HRTs for 1 year and their performances in terms of treatment of conventional and emerging pollutants (ARB and ARGs) were assessed. The results indicated higher removal of ARB and ARGs in aerobic reactors compared to anaerobic reactor. Treatment studies in various bioreactors showed that the use of MTF along with UV/Ozone was superior to ASP and anaerobic flow-through reactor in reducing both the conventional and emerging pollutants. However, higher reduction of the pollutants was observed at higher HRTs. Though complete removal of coliforms and ARB was observed by treating the wastewater using MTF followed by UV or ozone but substantial levels of ARGs were observed in the effluent. Therefore, different advanced and effective treatment technologies such as filtration (RO), use of zero valent iron, TiO2 photocatalysis and other strong oxidizing agents which can ensure complete removal of ARGs along with ARB need to be evaluated. Though addition of these units will increase the treatment cost, but the increased cost would be negligible compared to the present disease burden of AR.
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Affiliation(s)
- Manisha Lamba
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
| | - Shaikh Ziauddin Ahammad
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India.
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10
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Tripathi V, Tripathi P. Antibiotic Resistance Genes: An Emerging Environmental Pollutant. PERSPECTIVES IN ENVIRONMENTAL TOXICOLOGY 2017. [DOI: 10.1007/978-3-319-46248-6_9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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11
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Purohit HJ, Kapley A, Khardenavis A, Qureshi A, Dafale NA. Insights in Waste Management Bioprocesses Using Genomic Tools. ADVANCES IN APPLIED MICROBIOLOGY 2016; 97:121-170. [PMID: 27926430 DOI: 10.1016/bs.aambs.2016.09.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Microbial capacities drive waste stabilization and resource recovery in environmental friendly processes. Depending on the composition of waste, a stress-mediated selection process ensures a scenario that generates a specific enrichment of microbial community. These communities dynamically change over a period of time while keeping the performance through the required utilization capacities. Depending on the environmental conditions, these communities select the appropriate partners so as to maintain the desired functional capacities. However, the complexities of these organizations are difficult to study. Individual member ratios and sharing of genetic intelligence collectively decide the enrichment and survival of these communities. The next-generation sequencing options with the depth of structure and function analysis have emerged as a tool that could provide the finer details of the underlying bioprocesses associated and shared in environmental niches. These tools can help in identification of the key biochemical events and monitoring of expression of associated phenotypes that will support the operation and maintenance of waste management systems. In this chapter, we link genomic tools with process optimization and/or management, which could be applied for decision making and/or upscaling. This review describes both, the aerobic and anaerobic, options of waste utilization process with the microbial community functioning as flocs, granules, or biofilms. There are a number of challenges involved in harnessing the microbial community intelligence with associated functional plasticity for efficient extension of microbial capacities for resource recycling and waste management. Mismanaged wastes could lead to undesired genotypes such as antibiotic/multidrug-resistant microbes.
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Affiliation(s)
- H J Purohit
- National Environmental Engineering Research Institute, CSIR, Nagpur, India
| | - A Kapley
- National Environmental Engineering Research Institute, CSIR, Nagpur, India
| | - A Khardenavis
- National Environmental Engineering Research Institute, CSIR, Nagpur, India
| | - A Qureshi
- National Environmental Engineering Research Institute, CSIR, Nagpur, India
| | - N A Dafale
- National Environmental Engineering Research Institute, CSIR, Nagpur, India
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12
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De Sotto RB, Medriano CAD, Salcedo DE, Lee H, Cho Y, Kim S. Effects of solids retention time on the fate of tetracycline resistance in SBRs for the treatment of carcass leachate. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 181:298-303. [PMID: 27372252 DOI: 10.1016/j.jenvman.2016.06.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Revised: 06/14/2016] [Accepted: 06/24/2016] [Indexed: 05/21/2023]
Abstract
In the event of a foot and mouth disease outbreak, further spread of the virus is generally prevented by culling of infected animals in burial pits. This practice may eventually lead to groundwater contamination through leaching of wastewater from the animal carcasses. Wastewater from carcass leachate often contains antibiotic resistant bacteria and genes as well as traces of pharmaceuticals, and a high nutrient content. The role of operational parameters used in activated sludge treatment of this wastewater in the spread of antibiotic resistance has not been fully understood. This study investigated the fate of tetracycline-resistant bacteria and genes in sequencing batch reactors with synthetic carcass leachate at different solid retention times. Escherichia coli DH5α was used as the representative tetracycline-resistant bacteria with multiple antibiotic-resistant genes encoded in plasmid pB10. Solids retention time contributed to an increase in antibiotic resistance in SBRC (SRT = 25 days) with TRB values up to 1.25 × 10(7) CFU/mL which is one log higher than the influent. Microbial community analysis of the DNA samples from effluent of SBRC showed four major phyla: Proteobacteria, Bacteroidetes, Firmicutes, and Actinobacteria under which are ecologically-important microbial species. It was shown that antibiotic resistance genes cannot be eliminated during treatment of synthetic carcass leachate in a lab-scale sequencing batch reactor.
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Affiliation(s)
- R B De Sotto
- Bio Monitoring Laboratory, Program for Environmental Technology and Policy, Korea University Sejong Campus, 2511 Sejong-ro, Sejong City, Chungnam 339-700, South Korea
| | - C A D Medriano
- Bio Monitoring Laboratory, Program for Environmental Technology and Policy, Korea University Sejong Campus, 2511 Sejong-ro, Sejong City, Chungnam 339-700, South Korea
| | - D E Salcedo
- Bio Monitoring Laboratory, Program for Environmental Technology and Policy, Korea University Sejong Campus, 2511 Sejong-ro, Sejong City, Chungnam 339-700, South Korea
| | - H Lee
- Bio Monitoring Laboratory, Program for Environmental Technology and Policy, Korea University Sejong Campus, 2511 Sejong-ro, Sejong City, Chungnam 339-700, South Korea
| | - Y Cho
- Department of Environmental Engineering, Daejeon University, 62 Daehak-ro, Dong-gu, Daejeon 300-716, South Korea.
| | - S Kim
- Bio Monitoring Laboratory, Program for Environmental Technology and Policy, Korea University Sejong Campus, 2511 Sejong-ro, Sejong City, Chungnam 339-700, South Korea.
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13
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Kor-Bicakci G, Ubay-Cokgor E, Orhon D. Acute impact of tetracycline on the utilization of acetate by activated sludge sustained under different growth conditions. BIORESOURCE TECHNOLOGY 2015; 198:157-164. [PMID: 26386418 DOI: 10.1016/j.biortech.2015.08.134] [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: 07/30/2015] [Revised: 08/28/2015] [Accepted: 08/29/2015] [Indexed: 06/05/2023]
Abstract
The study evaluated acute impact of tetracycline on the biodegradation of acetate by microbial cultures acclimated to different growth conditions. Two fill/draw reactors were operated to obtain acclimated cultures at sludge ages of 2 and 10 days. Acclimated biomass seeding was used in two series of batch experiments. The first run served as control and others were started with tetracycline doses of 100mg/L and 400mg/L. Parallel batch reactors were also operated for oxygen uptake rate (OUR) measurements. Acute impact was evaluated by model calibration of OUR, chemical oxygen demand (COD) and intracellular storage profiles. Exposure to tetracycline did not impair COD removal but induced a shift in acetate utilization toward polyhydroxybutyrate (PHB) storage. This shift was more pronounced for fast growing biomass; it identified itself both in related process kinetics and the modified stoichiometry between the magnitude of acetate directly used for microbial growth and converted to PHB.
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Affiliation(s)
- G Kor-Bicakci
- Istanbul Technical University, Civil Engineering Faculty, Department of Environmental Engineering, 34469 Maslak, Istanbul, Turkey.
| | - E Ubay-Cokgor
- Istanbul Technical University, Civil Engineering Faculty, Department of Environmental Engineering, 34469 Maslak, Istanbul, Turkey
| | - D Orhon
- Istanbul Technical University, Civil Engineering Faculty, Department of Environmental Engineering, 34469 Maslak, Istanbul, Turkey; ENVIS Energy and Environmental Systems Ltd., ITU Arı Teknokent, Arı 1 Building, 16, 34469 Maslak, Istanbul, Turkey
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14
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Pang YC, Xi JY, Li GQ, Shi XJ, Hu HY. Prevalence of antibiotic-resistant bacteria in a lake for the storage of reclaimed water before and after usage as cooling water. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2015; 17:1182-1189. [PMID: 25997982 DOI: 10.1039/c5em00177c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Wastewater reclamation and reuse is a promising way to relieve water scarcity by substituting for natural water consumption by industrial cooling. However, health concerns regarding cooling water originating from reclaimed water are increasing because an abundance of antibiotic-resistant bacteria (ARB) has been detected in reclaimed water. To assess the potential increase of ARB risks in reclaimed water after reuse for industrial cooling, the prevalence of six types of ARB was investigated in water and sediment samples from Lake Gaobeidian, which serves as an artificial circular storage reservoir for reclaimed water for cooling reuse. The effect of treated wastewater and cooling water drainage on the ARB distribution in water and sediment samples was also studied. The results showed that the concentration levels of six types of ARB in lake water samples were as high as those in treated wastewater. The annual median concentrations of total heterotrophic bacteria (HPC) and ARB in discharged cooling water after usage were 0.6-log and 0.4-log higher than those in treated wastewater and the cooling water intake site, respectively, indicating that the process of cooling water usage enhanced the proliferation of HPC and consequently increased the concentrations of ARB. Furthermore, the percentages of penicillin-, ampicillin-, and cephalothin-resistant bacteria in water were 30-57%, 36-48%, and 23-40% higher than those in sediment, respectively. However, the proportions of chloramphenicol-resistant bacteria in water were 35-85% lower than those in sediment. Quantitative evaluation of antibiotic resistance showed that HPC in water had a significant tolerance to penicillin and chloramphenicol, with 50% inhibitory concentrations reaching 22.90 mg L(-1) and 29.11 mg L(-1), respectively.
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Affiliation(s)
- Yu-Chen Pang
- Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084, P. R. China.
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15
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Yuan QB, Guo MT, Yang J. The sludge loading rate regulates the growth and release of heterotrophic bacteria resistant to six types of antibiotics in wastewater activated sludge. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2015; 17:206-212. [PMID: 25502931 DOI: 10.1039/c4em00197d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Wastewater treatment plants are considered as hot reservoirs of antimicrobial resistance. However, the fates of antibiotic-resistant bacteria during biological treatment processes and relevant influencing factors have not been fully understood. This study evaluated the effects of the sludge loading rate on the growth and release of six kinds of antibiotic-resistant bacteria in an activated sludge system. The results indicated that higher sludge loading rates amplified the growth of all six types of antibiotic resistant bacteria. The release of most antibiotic-resistant bacteria through both the effluent and biosolids was amplified with increased sludge loading rate. Biosolids were the main pattern for all antibiotic-resistant bacteria release in an activated sludge system, which was determined primarily by their growth in the activated sludge. A higher sludge loading rate reactor tended to retain more antibiotic resistance. An activated sludge system with lower sludge loading rates was considered more conducive to the control of antibiotic resistance.
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Affiliation(s)
- Qing-Bin Yuan
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092, Shanghai, China.
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16
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Bouki C, Venieri D, Diamadopoulos E. Detection and fate of antibiotic resistant bacteria in wastewater treatment plants: a review. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2013; 91:1-9. [PMID: 23414720 DOI: 10.1016/j.ecoenv.2013.01.016] [Citation(s) in RCA: 332] [Impact Index Per Article: 30.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Revised: 01/18/2013] [Accepted: 01/19/2013] [Indexed: 05/06/2023]
Abstract
Antibiotics are among the most successful group of pharmaceuticals used for human and veterinary therapy. However, large amounts of antibiotics are released into municipal wastewater due to incomplete metabolism in humans or due to disposal of unused antibiotics, which finally find their ways into different natural environmental compartments. The emergence and rapid spread of antibiotic resistant bacteria (ARB) has led to an increasing concern about the potential environmental and public health risks. ARB and antibiotic resistant genes (ARGs) have been detected extensively in wastewater samples. Available data show significantly higher proportion of antibiotic resistant bacteria contained in raw and treated wastewater relative to surface water. According to these studies, the conditions in wastewater treatment plants (WWTPs) are favourable for the proliferation of ARB. Moreover, another concern with regards to the presence of ARB and ARGs is their effective removal from sewage. This review gives an overview of the available data on the occurrence of ARB and ARGs and their fate in WWTPs, on the biological methods dealing with the detection of bacterial populations and their resistance genes, and highlights areas in need for further research studies.
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Affiliation(s)
- Chryssa Bouki
- Department of Environmental Engineering, Technical University of Crete, GR-73100 Chania, Greece
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17
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Rizzo L, Manaia C, Merlin C, Schwartz T, Dagot C, Ploy MC, Michael I, Fatta-Kassinos D. Urban wastewater treatment plants as hotspots for antibiotic resistant bacteria and genes spread into the environment: a review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 447:345-60. [PMID: 23396083 DOI: 10.1016/j.scitotenv.2013.01.032] [Citation(s) in RCA: 1233] [Impact Index Per Article: 112.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 01/08/2013] [Accepted: 01/08/2013] [Indexed: 05/20/2023]
Abstract
Urban wastewater treatment plants (UWTPs) are among the main sources of antibiotics' release into the environment. The occurrence of antibiotics may promote the selection of antibiotic resistance genes (ARGs) and antibiotic resistant bacteria (ARB), which shade health risks to humans and animals. In this paper the fate of ARB and ARGs in UWTPs, focusing on different processes/technologies (i.e., biological processes, advanced treatment technologies and disinfection), was critically reviewed. The mechanisms by which biological processes influence the development/selection of ARB and ARGs transfer are still poorly understood. Advanced treatment technologies and disinfection process are regarded as a major tool to control the spread of ARB into the environment. In spite of intense efforts made over the last years to bring solutions to control antibiotic resistance spread in the environment, there are still important gaps to fill in. In particular, it is important to: (i) improve risk assessment studies in order to allow accurate estimates about the maximal abundance of ARB in UWTPs effluents that would not pose risks for human and environmental health; (ii) understand the factors and mechanisms that drive antibiotic resistance maintenance and selection in wastewater habitats. The final objective is to implement wastewater treatment technologies capable of assuring the production of UWTPs effluents with an acceptable level of ARB.
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Affiliation(s)
- L Rizzo
- Department of Civil Engineering, University of Salerno, 84084, Fisciano (SA), Italy.
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18
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Kim S, Aga DS. Potential ecological and human health impacts of antibiotics and antibiotic-resistant bacteria from wastewater treatment plants. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2007; 10:559-73. [PMID: 18049923 DOI: 10.1080/15287390600975137] [Citation(s) in RCA: 221] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The occurrence of antibiotics and other pharmaceuticals in the environment has become an increasing public concern as recent environmental monitoring activities reveal the presence of a broad range of persistent pharmaceuticals in soil and water. Studies show that municipal wastewater treatment plants (WWTPs) are important point sources of antibiotics and antibiotic-resistant bacteria in the environment. The fate of antibiotics and other pharmaceuticals in WWTPs is greatly influenced by the design and operation of treatment systems. Because knowledge on the fate of antibiotics and resistant bacteria in WWTPs is important in estimating their potential impacts on ecology and human health, investigations on occurrence, treatment, and observed effects are reviewed in this article. In addition, human health risk assessment protocols for antibiotic and resistant bacteria are described. Although data on other pharmaceutical compounds are also presented, discussion is focused on antibiotics in the environment because of the potential link to increased emergence of resistance among pathogenic bacteria. The applications of modern analytical methods that facilitate the identification of novel transformation products of pharmaceuticals in environmental matrices are also included to illustrate that the disappearance of the parent pharmaceuticals in WWTPs does not necessarily equate to their complete removal.
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Affiliation(s)
- Sungpyo Kim
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260, USA
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