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Tyumina E, Bazhutin G, Kostrikina N, Sorokin V, Mulyukin A, Ivshina I. Phenotypic and metabolic adaptations of Rhodococcus cerastii strain IEGM 1243 to separate and combined effects of diclofenac and ibuprofen. Front Microbiol 2023; 14:1275553. [PMID: 38125575 PMCID: PMC10730942 DOI: 10.3389/fmicb.2023.1275553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 11/21/2023] [Indexed: 12/23/2023] Open
Abstract
Introduction The increasing use of non-steroidal anti-inflammatory drugs (NSAIDs) has raised concerns regarding their environmental impact. To address this, understanding the effects of NSAIDs on bacteria is crucial for bioremediation efforts in pharmaceutical-contaminated environments. The primary challenge in breaking down persistent compounds lies not in the biochemical pathways but in capacity of bacteria to surmount stressors. Methods In this study, we examined the biodegradative activity, morphological and physiological changes, and ultrastructural adaptations of Rhodococcus cerastii strain IEGM 1243 when exposed to ibuprofen, diclofenac, and their mixture. Results and Discussion Our findings revealed that R. cerastii IEGM 1243 exhibited moderate biodegradative activity towards the tested NSAIDs. Cellular respiration assay showed higher metabolic activity in the presence of NSAIDs, indicating their influence on bacterial metabolism. Furthermore, catalase activity in R. cerastii IEGM 1243 exposed to NSAIDs showed an initial decrease followed by fluctuations, with the most significant changes observed in the presence of DCF and the NSAID mixture, likely influenced by bacterial growth phases, active NSAID degradation, and the formation of multicellular aggregates, suggesting potential intercellular synergy and task distribution within the bacterial community. Morphometric analysis demonstrated alterations in size, shape, and surface roughness of cells exposed to NSAIDs, with a decrease in surface area and volume, and an increase in surface area-to-volume ratio (SA/V). Moreover, for the first time, transmission electron microscopy confirmed the presence of lipid inclusions, polyphosphates, and intracellular membrane-like structures in the ibuprofen-treated cells. Conclusion These results provide valuable insights into the adaptive responses of R. cerastii IEGM 1243 to NSAIDs, shedding light on the possible interaction between bacteria and pharmaceutical compounds in the environment.
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Affiliation(s)
- Elena Tyumina
- Perm Federal Research Center, Ural Branch of the Russian Academy of Sciences, Institute of Ecology and Genetics of Microorganisms, Perm, Russia
- Department of Microbiology and Immunology, Perm State University, Perm, Russia
| | - Grigory Bazhutin
- Perm Federal Research Center, Ural Branch of the Russian Academy of Sciences, Institute of Ecology and Genetics of Microorganisms, Perm, Russia
- Department of Microbiology and Immunology, Perm State University, Perm, Russia
| | - Nadezhda Kostrikina
- Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Vladimir Sorokin
- Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Andrey Mulyukin
- Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - Irina Ivshina
- Perm Federal Research Center, Ural Branch of the Russian Academy of Sciences, Institute of Ecology and Genetics of Microorganisms, Perm, Russia
- Department of Microbiology and Immunology, Perm State University, Perm, Russia
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Chand N, Suthar S, Kumar K, Singh V. Removal of pharmaceuticals by vertical flow constructed wetland with different configurations: Effect of inlet load and biochar addition in the substrate. CHEMOSPHERE 2022; 307:135975. [PMID: 35944676 DOI: 10.1016/j.chemosphere.2022.135975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/02/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Pharmaceuticals (PCs) residues are considered an emerging threat to the environment due to their persistency, ecotoxicity and bioaccumulative nature. To study the PC (amoxicillin, AMX; caffeine, CF; ibuprofen, IBU) removal efficiency of vertical flow constructed wetland (VFCW), three setups of VFCWs were configured: SB (substrate matrix + biochar (BC)); SBP (substrate matrix + BC + plant); SP (substrate matrix + plant) and changes in effluent PC load was estimated at 24, 48, 72, 96, 120, 144 and 168 h intervals. SBP with an influent load of 1,000 μg L-1 showed the maximum removals of 75.51% (AMX), 87.53% (CF), and 79.93% (IBU) significantly higher than that of SB and SP (p < 0.00). Results showed an inverse relationship between removal efficacy and influent PCs loading. The average removal (%) by VFCWS (of all studied setups) was in the order: 66.20 > 47.88 > 39.0 (IBU), 56.56 > 42.12 > 34.36 (AMX), and 74.13 > 64.0 > 52.07 (CF) with 1,000, 5,000 > 10,000 μg L-1 influent load, respectively. The maximum removal of COD, NH4+-N, and NO3-N was recorded at 88.8%, 83.1%, and 64.9%, respectively in SBP, and their removal was hardly affected by influent PC concentration. In summary, planted VFCW spiked with BC could be a viable approach for the removal of PCs in wastewater. The impact of PC load on plant toxicity in VFCWs can be taken as a research problem for future work in this series.
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Affiliation(s)
- Naveen Chand
- Laboratory of Environmental Sustainability & Energy Research, National Institute of Technology Delhi, Delhi 110036, India
| | - Surindra Suthar
- School of Environment & Natural Resources, Doon University, Dehradun 248001, Uttarakhand, India.
| | - Kapil Kumar
- Laboratory of Environmental Sustainability & Energy Research, National Institute of Technology Delhi, Delhi 110036, India
| | - Vineet Singh
- School of Environment & Natural Resources, Doon University, Dehradun 248001, Uttarakhand, India
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Ivshina I, Bazhutin G, Tyumina E. Rhodococcus strains as a good biotool for neutralizing pharmaceutical pollutants and obtaining therapeutically valuable products: Through the past into the future. Front Microbiol 2022; 13:967127. [PMID: 36246215 PMCID: PMC9557007 DOI: 10.3389/fmicb.2022.967127] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 09/12/2022] [Indexed: 11/18/2022] Open
Abstract
Active pharmaceutical ingredients present a substantial risk when they reach the environment and drinking water sources. As a new type of dangerous pollutants with high chemical resistance and pronounced biological effects, they accumulate everywhere, often in significant concentrations (μg/L) in ecological environments, food chains, organs of farm animals and humans, and cause an intense response from the aquatic and soil microbiota. Rhodococcus spp. (Actinomycetia class), which occupy a dominant position in polluted ecosystems, stand out among other microorganisms with the greatest variety of degradable pollutants and participate in natural attenuation, are considered as active agents with high transforming and degrading impacts on pharmaceutical compounds. Many representatives of rhodococci are promising as unique sources of specific transforming enzymes, quorum quenching tools, natural products and novel antimicrobials, biosurfactants and nanostructures. The review presents the latest knowledge and current trends regarding the use of Rhodococcus spp. in the processes of pharmaceutical pollutants’ biodegradation, as well as in the fields of biocatalysis and biotechnology for the production of targeted pharmaceutical products. The current literature sources presented in the review can be helpful in future research programs aimed at promoting Rhodococcus spp. as potential biodegraders and biotransformers to control pharmaceutical pollution in the environment.
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4
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Qin M, Jin K, Li X, Wang R, Li Y, Wang H. Novel highly-active Ag/Bi dual nanoparticles-decorated BiOBr photocatalyst for efficient degradation of ibuprofen. ENVIRONMENTAL RESEARCH 2022; 206:112628. [PMID: 34973193 DOI: 10.1016/j.envres.2021.112628] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 12/20/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
The surface plasmon resonance (SPR) effect of noble nanometals can be utilized to effectively improve the catalytic performance of semiconductor photocatalysts. In this work, a novel composite photocatalyst of BiOBr microspheres simultaneously decorated by Ag and Bi dual nanoparticles (NPs) has been successfully synthesized by the hydrothermal method plus one-step reduction method. And the morphology, structure, chemical composition and photoelectrical properties of this composite photocatalyst (Ag/Bi-BiOBr) were further characterized. Due to the SPR effect of Ag and Bi dual NPs, Ag/Bi-BiOBr showed the high light absorption with narrow band gap, as well as fast charge separation via metal-semiconductor heterojunction so as to realize an efficient degradation of ibuprofen (IBP) under simulated solar irradiation. Through the further optimization of the loading amounts of Ag and Bi dual NPs, the excellent photocatalytic activity in the Ag/Bi-BiOBr has been achieved that 92.3% of IBP was removed within 60 min, which is among the best results reported so far for IBP degradation via photocatalysis.
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Affiliation(s)
- Mian Qin
- College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318, China
| | - Kejie Jin
- College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318, China
| | - Xinyi Li
- College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318, China
| | - Rui Wang
- College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318, China
| | - Yongwei Li
- Heilongjiang Taina Technology Group Co., Ltd., Suihua, 152000, China.
| | - Huan Wang
- College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318, China.
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Díaz-Cubilla M, Letón P, Luna-Vázquez C, Marrón-Romera M, Boltes K. Effect of Carbamazepine, Ibuprofen, Triclosan and Sulfamethoxazole on Anaerobic Bioreactor Performance: Combining Cell Damage, Ecotoxicity and Chemical Information. TOXICS 2022; 10:toxics10010042. [PMID: 35051084 PMCID: PMC8779021 DOI: 10.3390/toxics10010042] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 12/16/2021] [Accepted: 12/29/2021] [Indexed: 02/04/2023]
Abstract
Pharmaceuticals and personal care products (PPCPs) are partially degraded in wastewater treatment plants (WWTPs), thereby leading to the formation of more toxic metabolites. Bacterial populations in bioreactors operated in WWTPs are sensitive to different toxics such as heavy metals and aromatic compounds, but there is still little information on the effect that pharmaceuticals exert on their metabolism, especially under anaerobic conditions. This work evaluated the effect of selected pharmaceuticals that remain in solution and attached to biosolids on the metabolism of anaerobic biomass. Batch reactors operated in parallel under the pressure of four individual and mixed PPCPs (carbamazepine, ibuprofen, triclosan and sulfametoxazole) allowed us to obtain relevant information on anaerobic digestion performance, toxicological effects and alterations to key enzymes involved in the biodegradation process. Cell viability was quantitatively evaluated using an automatic analysis of confocal microscopy images, and showed that triclosan and mixed pollutants caused higher toxicity and cell death than the other individual compounds. Both individual pollutants and their mixture had a considerable impact on the anaerobic digestion process, favoring carbon dioxide production, lowering organic matter removal and methane production, which also produced microbial stress and irreversible cell damage.
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Affiliation(s)
- Mabel Díaz-Cubilla
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33,600, 28871 Alcala de Henares, Spain; (M.D.-C.); (P.L.)
| | - Pedro Letón
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33,600, 28871 Alcala de Henares, Spain; (M.D.-C.); (P.L.)
- IMDEA Water Institute, Parque Científico Tecnológico, 28805 Alcala de Henares, Spain
| | - Carlos Luna-Vázquez
- Departamento de Electrónica, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33,600, 28871 Alcala de Henares, Spain; (C.L.-V.); (M.M.-R.)
| | - Marta Marrón-Romera
- Departamento de Electrónica, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33,600, 28871 Alcala de Henares, Spain; (C.L.-V.); (M.M.-R.)
| | - Karina Boltes
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33,600, 28871 Alcala de Henares, Spain; (M.D.-C.); (P.L.)
- IMDEA Water Institute, Parque Científico Tecnológico, 28805 Alcala de Henares, Spain
- Correspondence: Karina Boltes
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A review on environmental occurrence, toxicity and microbial degradation of Non-Steroidal Anti-Inflammatory Drugs (NSAIDs). JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 300:113694. [PMID: 34537557 DOI: 10.1016/j.jenvman.2021.113694] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/19/2021] [Accepted: 09/04/2021] [Indexed: 02/05/2023]
Abstract
In recent years, Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) have surfaced as a novel class of pollutants due to their incomplete degradation in wastewater treatment plants and their inherent ability to promote physiological predicaments in humans even at low doses. The occurrence of the most common NSAIDs (diclofenac, ibuprofen, naproxen, and ketoprofen) in river water, groundwater, finished water samples, WWTPs, and hospital wastewater effluents along with their toxicity effects were reviewed. The typical concentrations of NSAIDs in natural waters were mostly below 1 μg/L, the rivers receiving untreated wastewater discharge have often showed higher concentrations, highlighting the importance of effective wastewater treatment. The critical analysis of potential, pathways and mechanisms of microbial degradation of NSAIDs were also done. Although studies on algal and fungal strains were limited, several bacterial strains were known to degrade NSAIDs. This microbial ability is attributed to hydroxylation by cytochrome P450 because of the decrease in drug concentrations in fungal cultures of Phanerochaete sordida YK-624 on incubation with 1-aminobenzotriazole. Moreover, processes like decarboxylation, dehydrogenation, dechlorination, subsequent oxidation, demethylation, etc. also constitute the degradation pathways. A wide array of enzymes like dehydrogenase, oxidoreductase, dioxygenase, monooxygenase, decarboxylase, and many more are upregulated during the degradation process, which indicates the possibility of their involvement in microbial degradation. Specific hindrances in upscaling the process along with analytical research needs were also identified, and novel investigative approaches for future monitoring studies are proposed.
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Gemuh CV, Horstkotte B, Solich P. Lab-In-Syringe with Bead Injection Coupled Online to High-Performance Liquid Chromatography as Versatile Tool for Determination of Nonsteroidal Anti-Inflammatory Drugs in Surface Waters. Molecules 2021; 26:molecules26175358. [PMID: 34500791 PMCID: PMC8433787 DOI: 10.3390/molecules26175358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 08/30/2021] [Indexed: 11/16/2022] Open
Abstract
We report on the hyphenation of the modern flow techniques Lab-In-Syringe and Lab-On-Valve for automated sample preparation coupled online with high-performance liquid chromatography. Adopting the bead injection concept on the Lab-On-Valve platform, the on-demand, renewable, solid-phase extraction of five nonsteroidal anti-inflammatory drugs, namely ketoprofen, naproxen, flurbiprofen, diclofenac, and ibuprofen, was carried out as a proof-of-concept. In-syringe mixing of the sample with buffer and standards allowed straightforward pre-load sample modification for the preconcentration of large sample volumes. Packing of ca. 4.4 mg microSPE columns from Oasis HLB® sorbent slurry was performed for each sample analysis using a simple microcolumn adapted to the Lab-On-Valve manifold to achieve low backpressure during loading. Eluted analytes were injected into online coupled HPLC with subsequent separation on a Symmetry C18 column in isocratic mode. The optimized method was highly reproducible, with RSD values of 3.2% to 7.6% on 20 µg L-1 level. Linearity was confirmed up to 200 µg L-1 and LOD values were between 0.06 and 1.98 µg L-1. Recovery factors between 91 and 109% were obtained in the analysis of spiked surface water samples.
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Rios‐Miguel AB, Jetten MSM, Welte CU. Effect of concentration and hydraulic reaction time on the removal of pharmaceutical compounds in a membrane bioreactor inoculated with activated sludge. Microb Biotechnol 2021; 14:1707-1721. [PMID: 34132479 PMCID: PMC8313272 DOI: 10.1111/1751-7915.13837] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/16/2021] [Accepted: 05/10/2021] [Indexed: 01/04/2023] Open
Abstract
Pharmaceuticals are often not fully removed in wastewater treatment plants (WWTPs) and are thus being detected at trace levels in water bodies all over the world posing a risk to numerous organisms. These organic micropollutants (OMPs) reach WWTPs at concentrations sometimes too low to serve as growth substrate for microorganisms; thus, co-metabolism is thought to be the main conversion mechanism. In this study, the microbial removal of six pharmaceuticals was investigated in a membrane bioreactor at increasing concentrations (4-800 nM) of the compounds and using three different hydraulic retention times (HRT; 1, 3.5 and 5 days). The bioreactor was inoculated with activated sludge from a municipal WWTP and fed with ammonium, acetate and methanol as main growth substrates to mimic co-metabolism. Each pharmaceutical had a different average removal efficiency: acetaminophen (100%) > fluoxetine (50%) > metoprolol (25%) > diclofenac (20%) > metformin (15%) > carbamazepine (10%). Higher pharmaceutical influent concentrations proportionally increased the removal rate of each compound, but surprisingly not the removal percentage. Furthermore, only metformin removal improved to 80-100% when HRT or biomass concentration was increased. Microbial community changes were followed with 16S rRNA gene amplicon sequencing in response to the increment of pharmaceutical concentration: Nitrospirae and Planctomycetes 16S rRNA relative gene abundance decreased, whereas Acidobacteria and Bacteroidetes increased. Remarkably, the Dokdonella genus, previously implicated in acetaminophen metabolism, showed a 30-fold increase in abundance at the highest concentration of pharmaceuticals applied. Taken together, these results suggest that the incomplete removal of most pharmaceutical compounds in WWTPs is dependent on neither concentration nor reaction time. Accordingly, we propose a chemical equilibrium or a growth substrate limitation as the responsible mechanisms of the incomplete removal. Finally, Dokdonella could be the main acetaminophen degrader under activated sludge conditions, and non-antibiotic pharmaceuticals might still be toxic to relevant WWTP bacteria.
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Affiliation(s)
- Ana B. Rios‐Miguel
- Department of MicrobiologyInstitute for Water and Wetland ResearchRadboud UniversityHeyendaalseweg 135Nijmegen6525 AJThe Netherlands
| | - Mike S. M. Jetten
- Department of MicrobiologyInstitute for Water and Wetland ResearchRadboud UniversityHeyendaalseweg 135Nijmegen6525 AJThe Netherlands
- Soehngen Institute of Anaerobic MicrobiologyRadboud UniversityHeyendaalseweg 135Nijmegen6525 AJThe Netherlands
| | - Cornelia U. Welte
- Department of MicrobiologyInstitute for Water and Wetland ResearchRadboud UniversityHeyendaalseweg 135Nijmegen6525 AJThe Netherlands
- Soehngen Institute of Anaerobic MicrobiologyRadboud UniversityHeyendaalseweg 135Nijmegen6525 AJThe Netherlands
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Wu G, Geng J, Shi Y, Wang L, Xu K, Ren H. Comparison of diclofenac transformation in enriched nitrifying sludge and heterotrophic sludge: Transformation rate, pathway, and role exploration. WATER RESEARCH 2020; 184:116158. [PMID: 32755734 DOI: 10.1016/j.watres.2020.116158] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 06/09/2020] [Accepted: 07/04/2020] [Indexed: 06/11/2023]
Abstract
The adverse effects of diclofenac (DCF) on ecosystems and human health have induced increasing interest in its elimination in environment. DCF can be removed to some extent by nitrifying and heterotrophic microbes during wastewater treatment process. However, the actual roles of nitrifying and heterotrophic microbes in the transformation of DCF remain unclear. In this study, batch experiments were conducted to explore the biological transformation of DCF in enriched nitrifying sludge (NS), heterotrophic sludge (HS) and activated sludge (AS) systems. DCF was removed three times faster in enriched NS than in HS. Three transformation pathways of DCF in enriched NS, HS, and AS were proposed and compared. Hydroxylation was the crucial transformation step in the three transformation pathways. A faster hydroxylation reaction contributed to the faster removal of DCF in enriched NS. More transformation products (TPs) and reaction types (i.e. reductive dechlorination, sulphidation and methylation reactions) were observed in HS. Furthermore, some TPs that were resistant to degrade in enriched NS, such as DCF-benzoic acid, could be further transformed in HS. Accordingly, enriched NS could remove DCF more rapidly while HS could further transform some TPs resistant to degrade in enriched NS. Nitrifying and heterotrophic microbes may cooperatively and rapidly eliminate not only DCF, but also its TPs.
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Affiliation(s)
- Gang Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu, 210023, PR China
| | - Jinju Geng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu, 210023, PR China.
| | - Yufei Shi
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu, 210023, PR China
| | - Liye Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu, 210023, PR China
| | - Ke Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu, 210023, PR China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Jiangsu, 210023, PR China
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Kim D, Nguyen LN, Oh S. Ecological impact of the antibiotic ciprofloxacin on microbial community of aerobic activated sludge. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2020; 42:1531-1541. [PMID: 31420762 DOI: 10.1007/s10653-019-00392-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 08/08/2019] [Indexed: 06/10/2023]
Abstract
This study investigated the effects and fate of the antibiotic ciprofloxacin (CIP) at environmentally relevant levels (50-500 µg/L) in activated sludge (AS) microbial communities under aerobic conditions. Exposure to 500 µg/L of CIP decreased species diversity by about 20% and significantly altered the phylogenetic structure of AS communities compared to those of control communities (no CIP exposure), while there were no significant changes upon exposure to 50 µg/L of CIP. Analysis of community composition revealed that exposure to 500 µg/L of CIP significantly reduced the relative abundance of Rhodobacteraceae and Nakamurellaceae by more than tenfold. These species frequently occur in AS communities across many full-scale wastewater treatment plants and are involved in key ecosystem functions (i.e., organic matter and nitrogen removal). Our analyses showed that 50-500 µg/L CIP was poorly removed in AS (about 20% removal), implying that the majority of CIP from AS processes may be released with either their effluents or waste sludge. We therefore strongly recommend further research on CIP residuals and/or post-treatment processes (e.g., anaerobic digestion) for waste streams that may cause ecological risks in receiving water bodies.
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Affiliation(s)
- Dogun Kim
- Department of Civil Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-Gu, Yongin-Si, Gyeonggi-do, 17104, Republic of Korea
| | - Luong N Nguyen
- Center for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Seungdae Oh
- Department of Civil Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-Gu, Yongin-Si, Gyeonggi-do, 17104, Republic of Korea.
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Tyumina EA, Bazhutin GA, Cartagena Gómez ADP, Ivshina IB. Nonsteroidal Anti-inflammatory Drugs as Emerging Contaminants. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261720020125] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Sauvêtre A, Węgrzyn A, Yang L, Vestergaard G, Miksch K, Schröder P, Radl V. Enrichment of endophytic Actinobacteria in roots and rhizomes of Miscanthus × giganteus plants exposed to diclofenac and sulfamethoxazole. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:11892-11904. [PMID: 31981026 DOI: 10.1007/s11356-020-07609-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 01/01/2020] [Indexed: 06/10/2023]
Abstract
This study investigates how wastewater containing 2 mg l-1 of sulfamethoxazole (SMX) and 2 mg l-1 of diclofenac (DCF) affects the composition of bacterial communities present in the roots and rhizomes of Miscanthus × giganteus plants grown in laboratory-scale constructed wetlands. Bacterial communities in plant roots and rhizomes were identified in treated and control samples by 16S rRNA amplicon sequencing. Moreover, bacterial endophytes were isolated in R2A and 1/10 869 media and screened for their ability to metabolize SMX and DCF in liquid medium by HPLC. Our results show significant changes in the abundance of main genera, namely Sphingobium and Streptomyces between control and treated plants. Around 70% of the strains isolated from exposed plants belonged to the phylum Actinobacteria and were classified as Streptomyces, Microbacterium, and Glycomyces. In non-exposed plants, Proteobacteria represented 43.5% to 63.6% of the total. We identified 17 strains able to remove SMX and DCF in vitro. From those, 76% were isolated from exposed plants. Classified mainly as Streptomyces, they showed the highest SMX (33%) and DCF (41%) removal efficiency. These isolates, alone or in combination, might be used as bio-inoculants in constructed wetlands to enhance the phytoremediation of SMX and DCF during wastewater treatment.
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Affiliation(s)
- Andrés Sauvêtre
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany.
- HydroSciences Montpellier, UMR 5569, Faculté de Pharmacie, University of Montpellier, Avenue Charles Flahault 15, 34000, Montpellier, France.
| | - Anna Węgrzyn
- Environmental Biotechnology Department, Faculty of Energy and Environmental Engineering, Silesian University of Technology, Gliwice, Poland., Konarskiego 18, 44-100, Gliwice, Poland
| | - Luhua Yang
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Gisle Vestergaard
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
- Institute for Microbiology, University of Copenhagen; Microbiology, Universitetsparken 15, 2100, Copenhagen, Denmark
| | - Korneliusz Miksch
- Environmental Biotechnology Department, Faculty of Energy and Environmental Engineering, Silesian University of Technology, Gliwice, Poland., Konarskiego 18, 44-100, Gliwice, Poland
| | - Peter Schröder
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Viviane Radl
- Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
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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] [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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Wojcieszyńska D, Guzik U. Naproxen in the environment: its occurrence, toxicity to nontarget organisms and biodegradation. Appl Microbiol Biotechnol 2020; 104:1849-1857. [PMID: 31925484 PMCID: PMC7007908 DOI: 10.1007/s00253-019-10343-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 12/20/2019] [Accepted: 12/28/2019] [Indexed: 12/11/2022]
Abstract
This article summarizes the current knowledge about the presence of naproxen in the environment, its toxicity to nontarget organisms and the microbial degradation of this drug. Currently, naproxen has been detected in all types of water, including drinking water and groundwater. The concentrations that have been observed ranged from ng/L to μg/L. These concentrations, although low, may have a negative effect of long-term exposure on nontarget organisms, especially when naproxen is mixed with other drugs. The biological decomposition of naproxen is performed by fungi, algae and bacteria, but the only well-described pathway for its complete degradation is the degradation of naproxen by Bacillus thuringiensis B1(2015b). The key intermediates that appear during the degradation of naproxen by this strain are O-desmethylnaproxen and salicylate. This latter is then cleaved by 1,2-salicylate dioxygenase or is hydroxylated to gentisate or catechol. These intermediates can be cleaved by the appropriate dioxygenases, and the resulting products are incorporated into the central metabolism. KEY POINTS: •High consumption of naproxen is reflected in its presence in the environment. •Prolonged exposure of nontargeted organisms to naproxen can cause adverse effects. •Naproxen biodegradation occurs mainly through desmethylnaproxen as a key intermediate.
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Affiliation(s)
- Danuta Wojcieszyńska
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Science, University of Silesia in Katowice, Jagiellońska 28, 40-032, Katowice, Poland.
| | - Urszula Guzik
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Science, University of Silesia in Katowice, Jagiellońska 28, 40-032, Katowice, Poland
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15
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Amariei G, Boltes K, Rosal R, Leton P. Enzyme response of activated sludge to a mixture of emerging contaminants in continuous exposure. PLoS One 2020; 15:e0227267. [PMID: 31931513 PMCID: PMC6957336 DOI: 10.1371/journal.pone.0227267] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 12/15/2019] [Indexed: 01/07/2023] Open
Abstract
The relevant information about the impacts caused by presence of emerging pollutants in mixtures on the ecological environment, especially on the more vulnerable compartments such as activated sludge (AS) is relatively limited. This study investigated the effect of ibuprofen (IBU) and triclosan (TCS), alone and in combination to the performance and enzymatic activity of AS bacterial community. The assays were carried out in a pilot AS reactor operating for two-weeks under continuous dosage of pollutants. The microbial activity was tracked by measuring oxygen uptake rate, esterase activity, oxidative stress and antioxidant enzyme activities. It was found that IBU and TCS had no acute toxic effects on reactor biomass concentration. TCS led to significant decrease of COD removal efficiency, which dropped from 90% to 35%. Continuous exposure to IBU, TCS and their mixtures increased the activities of glutathione s-transferase (GST) and esterase as a response to oxidative damage. A high increase in GST activity was associated with non-reversible toxic damage while peaks of esterase activity combined with moderate GST increase were attributed to an adaptive response.
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Affiliation(s)
- Georgiana Amariei
- Department of Chemical Engineering, University of Alcalá, Alcalá de Henares, Madrid, Spain
- * E-mail:
| | - Karina Boltes
- Department of Chemical Engineering, University of Alcalá, Alcalá de Henares, Madrid, Spain
| | - Roberto Rosal
- Department of Chemical Engineering, University of Alcalá, Alcalá de Henares, Madrid, Spain
| | - Pedro Leton
- Department of Chemical Engineering, University of Alcalá, Alcalá de Henares, Madrid, Spain
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16
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17
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Wang D, He D, Liu X, Xu Q, Yang Q, Li X, Liu Y, Wang Q, Ni BJ, Li H. The underlying mechanism of calcium peroxide pretreatment enhancing methane production from anaerobic digestion of waste activated sludge. WATER RESEARCH 2019; 164:114934. [PMID: 31394464 DOI: 10.1016/j.watres.2019.114934] [Citation(s) in RCA: 116] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 07/23/2019] [Accepted: 07/29/2019] [Indexed: 05/21/2023]
Abstract
Recent investigations verified that calcium peroxide (CaO2) could be used to pretreat waste activated sludge to promote methane yield from anaerobic digestion. However, the underlying mechanism of how CaO2 pretreatment promotes methane production is unclear. This work therefore aims to provide insights into such systems. Experimental results showed that with an increase of CaO2 dosage from 0 to 0.14 g/g VSS (volatile suspended solids) the methane yield increased linearly from 146.3 to 215.9 mL/g VSS. Further increases of CaO2 resulted in decreases in methane yield. CaO2 pretreatment promoted the disintegration of sludge and the degradation of sludge recalcitrant organics (especially humus and lignocellulose), thereby providing more substrates for subsequent methane production. Ultraviolet absorption spectroscopy indicated that CaO2 enhanced the cleavage of unsaturated conjugated bonds and reduced the aromaticity of humus and lignocellulose. Fourier transform infrared spectroscopy showed that CaO2 changed the structures and functional groups of humus and lignocellulose, making them transform to be biodegradable. GC/MS analyses exhibited that the degradation products of humus and lignocellulose included several types of small molecular organics such as ester-like, acid-like, and alcohol-like substances. Further investigation demonstrated that substantial methane could be produced from these degradation products. It was also found that the presence of recalcitrant organics was detrimental to anaerobes relevant to anaerobic digestion, and the degradation of such recalcitrant organics mitigated their inhibitions to the anaerobes. Model-based analysis suggested that CaO2 pretreatment increased the maximum methane yield and methane production rate, which were consistent with the analysis above.
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Affiliation(s)
- Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
| | - Dandan He
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Xuran Liu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Qiuxiang Xu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Qi Yang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Xiaoming Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Yiwen Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Qilin Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Hailong Li
- School of Energy Science and Engineering, Central South University, Changsha, 410083, PR China
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18
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Hu H, Shi Y, Liao K, Ma H, Xu K, Ren H. Effect of temperature on the characterization of soluble microbial products in activated sludge system with special emphasis on dissolved organic nitrogen. WATER RESEARCH 2019; 162:87-94. [PMID: 31255784 DOI: 10.1016/j.watres.2019.06.034] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 05/18/2019] [Accepted: 06/13/2019] [Indexed: 06/09/2023]
Abstract
Previous research has focused on dissolved organic carbon (DOC) as a surrogate for soluble microbial products (SMPs) and found that temperature has a significant influence on the production of SMP-based DOC (SDOC) during biological processes. Little is known about the SMP-based dissolved organic nitrogen (SDON), although some nitrogenous organic matter has been identified as an important part of SMPs. This study investigated the effect of temperature (8 °C, 15 °C and 25 °C) on the characterization of SMPs in an activated sludge system with special emphasis on SDON. Results showed the positive effect of reduced temperature on SDON production. Fluorescence spectroscopy and ultrahigh-resolution mass spectrometry showed the produced SDON at 8 °C and 15 °C exhibits more lability than at 25 °C. This was also supported by the algal bioassay, indicating the SDON produced at low temperature is highly bioavailable and prone to stimulate algae and microorganisms. In addition, principal component analysis demonstrated that the effect of temperature on the chemical characterization of SDON is different from that of SDOC. Overall, this study highlights the importance of SDON control during biological processes at a low temperature to reduce the potential impact of effluent SMPs on receiving waters or wastewater reuse.
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Affiliation(s)
- Haidong Hu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Yuanji Shi
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Kewei Liao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Haijun Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Ke Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China.
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Wu G, Geng J, Li S, Li J, Fu Y, Xu K, Ren H, Zhang X. Abiotic and biotic processes of diclofenac in enriched nitrifying sludge: Kinetics, transformation products and reactions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 683:80-88. [PMID: 31136967 DOI: 10.1016/j.scitotenv.2019.05.216] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 05/14/2019] [Accepted: 05/14/2019] [Indexed: 06/09/2023]
Abstract
Diclofenac (DCF), as an emerging contaminant in aquatic environments, has sparked increasing concerns about its impact on the environment. Nitrification in wastewater treatment processing has removed DCF to a large extent. However, the removal characteristics and mechanisms of DCF in the nitrification process are still poorly understood. In this study, enriched nitrifying sludge was used to investigate the transformation of DCF during the nitrification process. Elimination of DCF caused by volatilization, hydrolyzation and adsorption was limited. Abiotic nitration removal was confirmed as significant in enriched nitrifying sludge at a low pH and high nitrite concentration. Free nitrite acid was proposed as the reaction species participating in the DCF transformation process, and a regression equation was developed to predict the contribution of abiotic nitration on DCF removal in enriched nitrifying sludge. By slowly and continuously adding an ammonia stock solution and controlling the pH, we avoided the effect of abiotic nitration removal, and DCF biodegradation was positively correlated to specific ammonium oxidation rates (SAORs). The removal of DCF fit the first order kinetic model (R2 = 0.8285, p < 0.05) with an SAOR of 0.25 mg NH4+-N/(gMLSS·min). The high removal rate constant of k (0.1286 L/(gMLSS·h)) and short half-life (2.48 h) revealed the strong capability of nitrifying bacteria to transform DCF. Nine DCF transformation products were identified and three of them were quantified in the transformation process. The formation of kinetic profile 4-OH-DCF, 5-OH-DCF and DCF-Benzoic acid (DCF-BA) implied that hydroxylation may be the first reaction of DCF and DCF-BA may be a terminal product that resists further degradation. The postulated reactions concerning the transformation of DCF were hydroxylation, lactam formation and oxidation. Accordingly, a detailed degradation pathway was presented.
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Affiliation(s)
- Gang Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023, Jiangsu, PR China
| | - Jinju Geng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023, Jiangsu, PR China.
| | - Shengnan Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023, Jiangsu, PR China
| | - Juechun Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023, Jiangsu, PR China
| | - Yingying Fu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023, Jiangsu, PR China
| | - Ke Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023, Jiangsu, PR China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023, Jiangsu, PR China
| | - Xuxiang Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023, Jiangsu, PR China
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20
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Liao K, Hu H, Ma S, Ren H. Effect of microbial activity and microbial community structure on the formation of dissolved organic nitrogen (DON) and bioavailable DON driven by low temperatures. WATER RESEARCH 2019; 159:397-405. [PMID: 31121407 DOI: 10.1016/j.watres.2019.04.049] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 04/12/2019] [Accepted: 04/27/2019] [Indexed: 06/09/2023]
Abstract
Dissolved organic nitrogen (DON) formed by microbial metabolism in wastewater treatment processes adversely impacts wastewater reuse and receiving waters quality, and microbial metabolism is greatly influenced by temperatures. However, little is known about the effect of microorganisms on DON and bioavailable DON (ABDON) formation under low temperatures. In this study, six reactors were operated at low (8 °C and 15 °C) and room (25 °C) temperatures to evaluate the relationship between microbial activity, microbial communities, and DON and ABDON. Results showed that DON and ABDON concentrations significantly increased at low temperatures (p < 0.05, t-test). DON formation was significantly correlated to microbial activity only, with adenosine triphosphate (negative, r = -0.64) and polysaccharide (positive, r = 0.61) as key indicators; however, ABDON formation was influenced by both microbial activity (polysaccharide > triphenyltetrazolium chloride-dehydrogenases > adenosine triphosphate) and microbial community structure. Short-term tests using the biomass from six reactors were performed at room temperature to further validate the relationship. The distinct differences between these results provide a basis for different strategies on reducing effluent DON and ABDON under low temperatures.
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Affiliation(s)
- Kewei Liao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Haidong Hu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Sijia Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China.
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21
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Navrozidou E, Melidis P, Ntougias S. Biodegradation aspects of ibuprofen and identification of ibuprofen-degrading microbiota in an immobilized cell bioreactor. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:14238-14249. [PMID: 30859445 DOI: 10.1007/s11356-019-04771-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 03/04/2019] [Indexed: 06/09/2023]
Abstract
An enrichment process was employed by applying high ibuprofen concentration in an immobilized cell bioreactor in order to favor the ibuprofen-degrading community present in activated sludge. Experimental data showed the ability of the immobilized cell bioreactor to achieve high ibuprofen removal efficiencies (98.4 ± 0.3%), the tendency of the enriched biomass to acidify the treated liquor, and the inhibition of the nitrification process. Illumina sequencing revealed a massive increase in the relative abundance of Alphaproteobacteria and Gammaproteobacteria (from 29.1 to 80.8%) and a dramatic decrease in the proportion of Bacteroidetes, Planctomycetes, and Verrucomicrobia (from 42.7 to 2.1%) when pure ibuprofen served as the sole carbonaceous feeding substrate. This shift in the feeding conditions resulted in the predominance of Novosphingobium and Rhodanobacter (25.5 ± 10.8% and 25.2 ± 3.0%, respectively) and demonstrated a specialized ibuprofen-degrading bacterial community in activated sludge, which possessed the selective advantage to cope with its degradation. To the best of our knowledge, this bioreactor system was capable of effectively treating the highest ibuprofen concentration applied in wastewater treatment plants.
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Affiliation(s)
- Efstathia Navrozidou
- Spyridon Ntougias, Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67100, Xanthi, Greece
| | - Paraschos Melidis
- Spyridon Ntougias, Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67100, Xanthi, Greece
| | - Spyridon Ntougias
- Spyridon Ntougias, Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67100, Xanthi, Greece.
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22
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Kumar R, Sarmah AK, Padhye LP. Fate of pharmaceuticals and personal care products in a wastewater treatment plant with parallel secondary wastewater treatment train. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 233:649-659. [PMID: 30605791 DOI: 10.1016/j.jenvman.2018.12.062] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 12/08/2018] [Accepted: 12/19/2018] [Indexed: 05/08/2023]
Abstract
Seasonal variations in the concentrations and fate of 20 selected pharmaceuticals and personal care products (PPCPs) were investigated over one year in a wastewater treatment plant in New Zealand, which relies on a membrane bioreactor (MBR) and Bardenpho as parallel processes for its secondary treatment. Results showed that all of the monitored PPCPs were detected in the wastewater influent. Nonsteroidal anti-inflammatory drugs (NSAIDS) and caffeine were predominant in the influent, whereas in the effluent, β-blockers and benzotriazole were present at significant concentrations. Total PPCPs' concentration in the influent was found to be 130 μg/L. Average removal efficiency was found to be ≥ 99% for acetaminophen, caffeine, TCEP, naproxen, and ibuprofen, whereas <50% of trimethoprim, metoprolol, and benzotriazole were removed. Contrary to the existing literature, no significant differences were found in the removal of PPCPs through MBR and Bardenpho processes, hinting that optimally operated Bardenpho can be equally effective in the removal of emerging contaminants as MBR. The occurrence and removal efficiencies of PPCPs were found to exhibit significant seasonal variations, with the highest influent concentrations of PPCPs reported in autumn and winter. Heavy rainfall had an insignificant impact on PPCPs' removal efficiencies although it resulted in much-diluted concentrations of PPCPs in the influent. Spearman's correlation analysis showed significant correlations between PPCPs' mass loads in the influent, wastewater quality parameters, and environmental factors. It was also found that, except sulfamethoxazole, ecotoxicity risks were minimal for the rest of the monitored PPCPs in wastewater effluent.
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Affiliation(s)
- Rahul Kumar
- Department of Civil and Environmental Engineering, The University of Auckland, Auckland, New Zealand
| | - Ajit K Sarmah
- Department of Civil and Environmental Engineering, The University of Auckland, Auckland, New Zealand
| | - Lokesh P Padhye
- Department of Civil and Environmental Engineering, The University of Auckland, Auckland, New Zealand.
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23
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Górny D, Guzik U, Hupert-Kocurek K, Wojcieszyńska D. Naproxen ecotoxicity and biodegradation by Bacillus thuringiensis B1(2015b) strain. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 167:505-512. [PMID: 30368144 DOI: 10.1016/j.ecoenv.2018.10.067] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 10/15/2018] [Accepted: 10/17/2018] [Indexed: 05/09/2023]
Abstract
High level of naproxen consumption leads to the appearance of this drug in the environment but its possible effects on non-target organisms together with its biodegradation are not well studied. The aim of this work was to evaluate naproxen ecotoxicity by using the Microbial Assay for Risk Assessment. Moreover, Bacillus thuringiensis B1(2015b) was tested for both ecotoxicity and the ability of this strain to degrade naproxen in cometabolic conditions. The results indicate that the mean value of microbial toxic concentration estimated by MARA test amounts to 1.66 g/L whereas EC50 of naproxen for B1(2015b) strain was 4.69 g/L. At toxic concentration, Bacillus thuringiensis B1(2015b) showed 16:0 iso 3OH fatty acid presence and an increase in the ratio of total saturated to unsaturated fatty acids. High resistance of the examined strain to naproxen correlated with its ability to degrade this drug in cometabolic conditions. The results of bacterial reverse mutation assay (Ames test) revealed that naproxen at concentrations above 1 g/L showed genotoxic effect but the response was not dose-dependent. Maximal specific naproxen removal rate was observed at pH 6.5 and 30 °C, and in the presence of 0.5 g/L glucose as a growth substrate. Kinetic analysis allowed estimation of the half saturation constant (Ks) and the maximum specific naproxen removal rate (qmax) as 6.86 mg/L and 1.26 mg/L day, respectively. These results indicate that Bacillus thuringiensis B1(2015b) has a high ability to degrade naproxen and is a potential tool for bioremediation.
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Affiliation(s)
- Dorota Górny
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
| | - Urszula Guzik
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
| | - Katarzyna Hupert-Kocurek
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
| | - Danuta Wojcieszyńska
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland.
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Draft Genome Sequences of Isolates from Sediments of the River Elbe That Are Highly Tolerant to Diclofenac. Microbiol Resour Announc 2018; 7:MRA00849-18. [PMID: 30533899 PMCID: PMC6256467 DOI: 10.1128/mra.00849-18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 07/10/2018] [Indexed: 12/02/2022] Open
Abstract
Here, we report the genome sequences of one Achromobacter and four Pseudomonas strains isolated from sediments of the River Elbe which are highly tolerant toward the xenobiotic target compound diclofenac, a nonsteroidal anti-inflammatory drug (NSAID) and emerging contaminant. Here, we report the genome sequences of one Achromobacter and four Pseudomonas strains isolated from sediments of the River Elbe which are highly tolerant toward the xenobiotic target compound diclofenac, a nonsteroidal anti-inflammatory drug (NSAID) and emerging contaminant.
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25
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Hu J, Zhao J, Wang D, Li X, Zhang D, Xu Q, Peng L, Yang Q, Zeng G. Effect of diclofenac on the production of volatile fatty acids from anaerobic fermentation of waste activated sludge. BIORESOURCE TECHNOLOGY 2018; 254:7-15. [PMID: 29413941 DOI: 10.1016/j.biortech.2018.01.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/10/2018] [Accepted: 01/11/2018] [Indexed: 06/08/2023]
Abstract
In this study, the impact of diclofenac (DCF), an antiinflammatory drug being extensively used in human health care and veterinary treatment, on the production of volatile fatty acids (VFAs) from anaerobic fermentation of waste activated sludge (WAS) was investigated for the first time. Experimental results showed that when DCF concentration increased from 2.5 to 25 mg/kg total suspended solid (TSS), the maximum production of VFAs increased from 599 to 1113 mg COD/L, but further increase of DCF to 47.5 mg/kg TSS decreased VFAs yield to 896 mg COD/L. The mechanism investigation revealed that DCF had no effect on the hydrolysis process, promoted the process of acidogenesis, acetogenesis, and homoacetogenesis, but severely inhibited methanogenesis, leading to the accumulation of VFAs. Microbial community analysis showed that the addition of DCF could promote the relative abundance of VFAs (especially acetic acid) producers, which was well consistent with the results obtained above.
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Affiliation(s)
- Jiawei Hu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Jianwei Zhao
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Xiaoming Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Dan Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Qiuxiang Xu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Lai Peng
- Research Group of Sustainable Energy, Air and Water Technology, Department of Bioscience Engineering, University of Antwerp, Antwerp 2020, Belgium
| | - Qi Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
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