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da Silva TCB, Chaúque BJM, Benitez GB, Rott MB. Global prevalence of potentially pathogenic free-living amoebae in sewage and sewage-related environments-systematic review with meta-analysis. Parasitol Res 2024; 123:148. [PMID: 38433138 DOI: 10.1007/s00436-024-08164-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 02/14/2024] [Indexed: 03/05/2024]
Abstract
Free-living amoebae (FLA) include amphizoic microorganisms important in public health, widely isolated from air, water, and soil. However, its occurrence in sewage-related environments still needs to be systematically documented. This study summarizes the occurrence of FLA in sewage-related environments through a systematic review with meta-analysis. A total of 1983 scientific article were retrieved from different databases, of which 35 were selected and analyzed using a random effects forest plot model with a 95% confidence interval (IC). The pooled overall prevalence of FLA in sewage across 12 countries was 68.96% (95% IC = 58.5-79.42). Subgroup analysis indicates high prevalence in all environments analyzed, including sewage water from the sewage treatment plant (81.19%), treated sewage water (75.57%), sewage-contaminated water (67.70%), sediment contaminated by sewage (48.91%), and sewage water (47.84%). Prevalence values of Acanthamoeba spp., Hartmanella/Vermamoeba spp., and Naegleria spp. are 47.48%, 28.24%, and 16.69%, respectively. Analyzing the species level, the distribution is as follows: Acanthamoeba palestinensis (88%), A. castellanii (23.74%), A. astronyxis (19.18%), A. polyphaga (13.59%), A. culbertsoni (12.5%), A. stevensoni (8.33%), A. tubiashi (4.35%) and A. hatchetti (1.1%), Naegleria fowleri (28.4%), N. gruberi (25%), N. clarki (8.33%), N. australiensis (4.89%) and N. italica (4.29%), Hartmannella/Vermamoeba exundans (40%) and H.V. vermiform (32.61%). Overall, our findings indicate a high risk associated with sewage-related environments, as the prevalence of FLA, including pathogenic strains, is high, even in treated sewage water. The findings of this study may be valuable both for risk remediation actions against amoebic infections and for future research endeavors.
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Affiliation(s)
- Thaisla Cristiane Borella da Silva
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Rio Grande Do Sul, Brazil
| | - Beni Jequicene Mussengue Chaúque
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Rio Grande Do Sul, Brazil
- Postgraduate Program in Biological Sciences: Pharmacology and Therapeutics, UFRGS, Porto Alegre, Rio Grande Do Sul, Brazil
- Center of Studies in Science and Technology (NECET), Biology Course, Universidade Rovuma, Niassa Branch, Lichinga, Mozambique
| | - Guilherme Brittes Benitez
- Industrial and Systems Engineering Graduate Program, Polytechnic School, Pontifical Catholic University of Parana (PUCPR), Curitiba, Paraná, Brazil
| | - Marilise Brittes Rott
- Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Universidade Federal Do Rio Grande Do Sul, Porto Alegre, Rio Grande Do Sul, Brazil.
- Laboratory 520, Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Department of Parasitology, Universidade Federal Do Rio Grande Do Sul, Ramiro Barcelos Street, Porto Alegre, Rio Grande Do Sul, N 2600, Brazil.
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Costa JAV, Zaparoli M, Cassuriaga APA, Cardias BB, Vaz BDS, Morais MGD, Moreira JB. Biochar production from microalgae: a new sustainable approach to wastewater treatment based on a circular economy. Enzyme Microb Technol 2023; 169:110281. [PMID: 37390584 DOI: 10.1016/j.enzmictec.2023.110281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 05/31/2023] [Accepted: 06/23/2023] [Indexed: 07/02/2023]
Abstract
The generation of wastewater due to human activities are the main responsible for environmental problems. These problems are caused by the large amount of organic and inorganic pollutants related to the presence of pesticides, metals, pathogens, drugs and dyes. The photosynthetic treatment of effluents emerges as a sustainable and low-cost alternative for developing wastewater treatment systems based on a circular economy. Chemical compounds present in wastewater can be recovered and reused as a source of nutrients in microalgae cultivation to produce value-added bioproducts. The microalgal biomass produced in the cultivation with effluents has the potential to produce biochar. Biochar is carbon-rich charcoal that can be obtained by converting microalgae biomass through thermal decomposition of organic raw material under limited oxygen supply conditions. Pyrolysis, torrefaction, and hydrothermal carbonization are processes used for biochar synthesis. The application of microalgal biochar as an adsorbent material to remove several compounds present in effluents is an effective and fast treatment. This effectiveness is usually related to the unique physicochemical characteristics of the biochar, such as the presence of functional groups, ion exchange capacity, thermal stability, and high surface area, volume, and pore area. In addition, biochar can be reused in the adsorption process or applied in agriculture for soil correction. In this context, this review article describes the production, characterization, and use of microalgae biochar through a sustainable approach to wastewater treatment, emphasizing its potential in the circular economy. In addition, the article approaches the potential of microalgal biochar as an adsorbent material and its reuse after the adsorption of contaminants, as well as highlights the challenges and future perspectives on this topic.
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Affiliation(s)
- Jorge Alberto Vieira Costa
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil; Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Curitiba, PR, Brazil
| | - Munise Zaparoli
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Curitiba, PR, Brazil
| | - Ana Paula Aguiar Cassuriaga
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil
| | - Bruna Barcelos Cardias
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Curitiba, PR, Brazil
| | - Bruna da Silva Vaz
- Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal Uni-versity of Rio Grande, Rio Grande, RS, Brazil.
| | - Michele Greque de Morais
- Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal Uni-versity of Rio Grande, Rio Grande, RS, Brazil.
| | - Juliana Botelho Moreira
- Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal Uni-versity of Rio Grande, Rio Grande, RS, Brazil.
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Jeyakumar SS, Ponniah JM, Vasudevan J, Muñoz-Sevilla NP, Urrutia-Goyes R, Escobedo-Urias DC, Rodriguez-Espinosa PF. Public views on tourist beach environment from multinational countries and ensuing changes during global epidemic. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-26277-x. [PMID: 36917386 PMCID: PMC10013292 DOI: 10.1007/s11356-023-26277-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 02/28/2023] [Indexed: 05/25/2023]
Abstract
The continuous endemic of the new SARS-CoV-2 virus brought a halt to the world's activities from February 2020. Our study intends to gauge public perceptions on the consequences of post-pandemic changes on the marine environment, particularly as they are related to tourist beach amenities. Totally, 16 nations' knowledge and views on various environmental viewpoints over the effects of epidemic were gathered through public polls live on social media during social confinement in 2020. The results indicate that around 85% of respondents were most concerned about the alarming sights of widespread plastic trash and the increase of dangerous biomedical wastes through wastewater in the marine ecosystem. The outcomes of this study will undoubtedly aid in the establishment of a management strategy and for future studies on the consequences of any epidemic on the beaches.
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Affiliation(s)
- Sakthi Selvalakshmi Jeyakumar
- Centro Interdisciplinario de Investigaciones y Estudios Sobre Medio Ambiente y Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio La Laguna Ticomán, Del. Gustavo A. Madero, C.P.07340, Ciudad de Mexico, Mexico
| | - Jonathan Muthuswamy Ponniah
- Centro Interdisciplinario de Investigaciones y Estudios Sobre Medio Ambiente y Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio La Laguna Ticomán, Del. Gustavo A. Madero, C.P.07340, Ciudad de Mexico, Mexico.
| | - Joshua Vasudevan
- School of Architecture Building and Civil Engineering, Loughborough University, Mumfordway, Loughborough, LE11 3TU, UK
| | - Norma Patricia Muñoz-Sevilla
- Centro Interdisciplinario de Investigaciones y Estudios Sobre Medio Ambiente y Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio La Laguna Ticomán, Del. Gustavo A. Madero, C.P.07340, Ciudad de Mexico, Mexico
| | - Ricardo Urrutia-Goyes
- Departamento de Ciencias de La Energía y Mecánica, Av. Gral. Rumiñahui S/N, Universidad de Las Fuerzas Armadas ESPE, P.O. Box 171-5-231B, Sangolqui, 171103, Ecuador
| | - Diana Cecilia Escobedo-Urias
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional (CIIDIR), Instituto Politécnico Nacional (IPN), Bulevar Juan de Dios Bátiz Paredes #250, Colonia San Joachin, C.P.81101, Guasave, Sinaloa, Mexico
| | - Pedro Francisco Rodriguez-Espinosa
- Centro Interdisciplinario de Investigaciones y Estudios Sobre Medio Ambiente y Desarrollo (CIIEMAD), Instituto Politécnico Nacional (IPN), Calle 30 de Junio de 1520, Barrio La Laguna Ticomán, Del. Gustavo A. Madero, C.P.07340, Ciudad de Mexico, Mexico
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Shivaram KB, Bhatt P, Applegate B, Simsek H. Bacteriophage-based biocontrol technology to enhance the efficiency of wastewater treatment and reduce targeted bacterial biofilms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 862:160723. [PMID: 36496019 DOI: 10.1016/j.scitotenv.2022.160723] [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: 10/04/2022] [Revised: 11/13/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Wastewater treatment is an essential process for public health and a sustainable ecosystem. Inadequate wastewater treatment can lead to the release of organic and inorganic pollutants and pathogenic bacteria into the receiving waters which could be further utilized for recreation purposes. The interaction between bacteriophage and bacteria in a wastewater treatment plant plays a major role in maintaining the treatment process. Phage therapy has been proposed as an alternative to conventional treatment methods as bacteriophages can be used on specific targets and leave useful bacteria unharmed. The bacterial species, which are responsible for bulking, foaming, and biofilm formation in a wastewater treatment plant (WWTP) have been identified and their respective phages are isolated to control their growth. Phages with lytic life cycles are preferred to lysogenic. Lytic phages can kill the specific target as they lyse the cell, infect most of the hosts, and have an immediate effect on controlling problems caused by bacteria in a WWTP. The bacteriophages such as T7, SPI1, GTE7, PhaxI, MAG1, MAG2, ϕPh_Se01, ϕPh_Se02, and Bxb1 have been investigated for the removal of bacterial biofilms from wastewater. Novel experimental setups have improved the efficiency of phage therapy in small-scale and pilot-scale experiments. Much more in-depth knowledge of the microbial community and their interaction would help promote the usage of phage therapy in large-scale wastewater treatments. This paper has covered the recent advancements in phage therapy as an effective biocontrol of pathogenic bacteria in the wastewater treatment process and has looked at certain shortcomings that have to be improved.
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Affiliation(s)
- Karthik Basthi Shivaram
- Department of Agricultural & Biological Engineering, Purdue University, West Lafayette, IN 47906, USA
| | - Pankaj Bhatt
- Department of Agricultural & Biological Engineering, Purdue University, West Lafayette, IN 47906, USA
| | - Bruce Applegate
- Department of Food Science, Purdue University, West Lafayette, IN 47906, USA
| | - Halis Simsek
- Department of Agricultural & Biological Engineering, Purdue University, West Lafayette, IN 47906, USA.
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Towards the Implementation of Circular Economy in the Wastewater Sector: Challenges and Opportunities. WATER 2020. [DOI: 10.3390/w12051431] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The advancement of science has facilitated increase in the human lifespan, reflected in economic and population growth, which unfortunately leads to increased exploitation of resources. This situation entails not only depletion of resources, but also increases environmental pollution, mainly due to atmospheric emissions, wastewater effluents, and solid wastes. In this scenario, it is compulsory to adopt a paradigm change, as far as the consumption of resources by the population is concerned, to achieve a circular economy. The recovery and reuse of resources are key points, leading to a decrease in the consumption of raw materials, waste reduction, and improvement of energy efficiency. This is the reason why the concept of the circular economy can be applied in any industrial activity, including the wastewater treatment sector. With this in view, this review manuscript focuses on demonstrating the challenges and opportunities in applying a circular economy in the water sector. For example, reclamation and reuse of wastewater to increase water resources, by paying particular attention to the risks for human health, recovery of nutrients, or highly added-value products (e.g., metals and biomolecules among others), valorisation of sewage sludge, and/or recovery of energy. Being aware of this situation, in the European, Union 18 out of 27 countries are already reusing reclaimed wastewater at some level. Moreover, many wastewater treatment plants have reached energy self-sufficiency, producing up to 150% of their energy requirements. Unfortunately, many of the opportunities presented in this work are far from becoming a reality. Still, the first step is always to become aware of the problem and work on optimizing the solution to make it possible.
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Benito M, Menacho C, Chueca P, Ormad MP, Goñi P. Seeking the reuse of effluents and sludge from conventional wastewater treatment plants: Analysis of the presence of intestinal protozoa and nematode eggs. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 261:110268. [PMID: 32148324 DOI: 10.1016/j.jenvman.2020.110268] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 01/25/2020] [Accepted: 02/10/2020] [Indexed: 05/15/2023]
Abstract
Some of the microorganisms present in urban wastewater, which include intestinal protozoa and nematodes, can be pathogenic. Their (oo)cyst and egg transmissible stages are very resistant to environmental stresses and disinfectants and they are therefore difficult to remove. Thus, they can constitute a health risk if water or sludge obtained in the purification of wastewater is reused for agricultural purposes. In this context, the presence of intestinal protozoa and nematodes were studied in influents, effluents and sludge from five wastewater treatment plants (WWTPs) in the north of Spain by optical microscopy and PCR techniques. The removal efficiency of different wastewater treatments was also compared. The presence of protozoa has increased among the population discharging waste to WWTPs in recent years. Cryptosporidium spp., Giardia duodenalis, Entamoeba spp. and nematodes were detected in all of the WWTPs. Indeed, this is the first report of Entamoeba histolytica and Entamoeba moshkovskii in Spanish WWTPs. The water treatments studied showed different removal efficiencies for each species of intestinal protozoa, with the aerated lagoons providing the best results. (Oo)cysts were also detected in sludge even after aerobic digestion and dehydration. To avoid risks, (oo)cyst viability should be analysed whenever the sludge is to be used as a fertilizer. This study reinforces the necessity of establishing legal limits on the presence of protozoa in WWTP effluents and sludges, especially if reuse is planned. Further studies are necessary for a better understanding of the presence and behaviour of intestinal parasites.
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Affiliation(s)
- María Benito
- Department of Chemical Engineering and Environmental Technologies, EINA, University of Zaragoza, C/María de Luna 3, 50018, Zaragoza, Spain; Area of Parasitology, Department of Microbiology, Preventive Medicine and Public Health, Faculty of Medicine, University of Zaragoza, C/Domingo Miral s/n, 50009, Zaragoza, Spain.
| | - Carmen Menacho
- Department of Chemical Engineering and Environmental Technologies, EINA, University of Zaragoza, C/María de Luna 3, 50018, Zaragoza, Spain; Area of Parasitology, Department of Microbiology, Preventive Medicine and Public Health, Faculty of Medicine, University of Zaragoza, C/Domingo Miral s/n, 50009, Zaragoza, Spain; Water and Environmental Health Research Group, Environmental Sciences Institute (IUCA), University of Zaragoza, Zaragoza, Spain.
| | - Patricia Chueca
- Area of Parasitology, Department of Microbiology, Preventive Medicine and Public Health, Faculty of Medicine, University of Zaragoza, C/Domingo Miral s/n, 50009, Zaragoza, Spain.
| | - María P Ormad
- Department of Chemical Engineering and Environmental Technologies, EINA, University of Zaragoza, C/María de Luna 3, 50018, Zaragoza, Spain; Water and Environmental Health Research Group, Environmental Sciences Institute (IUCA), University of Zaragoza, Zaragoza, Spain.
| | - Pilar Goñi
- Area of Parasitology, Department of Microbiology, Preventive Medicine and Public Health, Faculty of Medicine, University of Zaragoza, C/Domingo Miral s/n, 50009, Zaragoza, Spain; Water and Environmental Health Research Group, Environmental Sciences Institute (IUCA), University of Zaragoza, Zaragoza, Spain.
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Moles S, Valero P, Escuadra S, Mosteo R, Gómez J, Ormad MP. Performance comparison of commercial TiO 2: separation and reuse for bacterial photo-inactivation and emerging pollutants photo-degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:9099-9113. [PMID: 31907820 DOI: 10.1007/s11356-019-07276-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/03/2019] [Indexed: 05/22/2023]
Abstract
This research aims to compare the disinfection and degradation effectiveness in water of a commercial suspension of nano-TiO2 (TiO2Levenger) with the standard TiO2Degussa P25. Photo-inactivation and photo-degradation experiments were conducted with UVA-vis light. Concerning the disinfection, the effects of TiO2 dose (0-2 g/l), water matrix, bacterium type (Gram-positive or Gram-negative), and bacterial regrowth after the photo-treatments were studied for each catalyst. The experimental results show that Enterococcus sp. (Gram-positive) was more resistant to the photo-treatments than Escherichia coli (Gram-negative) for both catalyst; however, postirradiation trends showed similar behavior for both bacteria, favoring regrowth for short-treated cells and decay for longer-treated ones. Caffeine was selected as a model substance of pharmaceuticals and personal care products. In terms of caffeine removal, the effects of TiO2 dose (0-2 g/l) and water matrix were analyzed. Besides, the comparison between mechanical coagulation-flocculation-decantation and simple decantation of TiO2 was carried out. The results show that simple decantation allowed the recovery of 97.5% of TiO2 Degussa P25 and TiO2 Levenger within 1 day of simple decantation, while applying the proposed mechanical coagulation-flocculation decantation 99.7% of recovery of both catalysts was achieved in 2 hours. Finally, the subsequent reuse of both catalysts was proved with little loss of efficiency in terms of photo-disinfection during the four cycles. Nevertheless, the standard TiO2 Degussa P25 photo-degradation efficiency of caffeine decreases considerably as compared to commercial suspension of TiO2 Levenger concerning the reutilization.
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Affiliation(s)
- Samuel Moles
- Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, 3 María de Luna Street, 50018, Zaragoza, Spain.
| | - Pilar Valero
- Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, 3 María de Luna Street, 50018, Zaragoza, Spain
| | - Silvia Escuadra
- Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, 3 María de Luna Street, 50018, Zaragoza, Spain
| | - Rosa Mosteo
- Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, 3 María de Luna Street, 50018, Zaragoza, Spain
| | - Jairo Gómez
- NILSA, Navarra Infraestructuras Locales S.A., Comunidad Foral de Navarra, Pamplona, Spain
| | - María P Ormad
- Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, 3 María de Luna Street, 50018, Zaragoza, Spain
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The role of algae in the removal and inactivation of pathogenic indicator organisms in wastewater stabilization pond systems. ALGAL RES 2020. [DOI: 10.1016/j.algal.2019.101777] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Samba-Louaka A, Delafont V, Rodier MH, Cateau E, Héchard Y. Free-living amoebae and squatters in the wild: ecological and molecular features. FEMS Microbiol Rev 2019; 43:415-434. [DOI: 10.1093/femsre/fuz011] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 04/30/2019] [Indexed: 02/06/2023] Open
Abstract
ABSTRACT
Free-living amoebae are protists frequently found in water and soils. They feed on other microorganisms, mainly bacteria, and digest them through phagocytosis. It is accepted that these amoebae play an important role in the microbial ecology of these environments. There is a renewed interest for the free-living amoebae since the discovery of pathogenic bacteria that can resist phagocytosis and of giant viruses, underlying that amoebae might play a role in the evolution of other microorganisms, including several human pathogens. Recent advances, using molecular methods, allow to bring together new information about free-living amoebae. This review aims to provide a comprehensive overview of the newly gathered insights into (1) the free-living amoeba diversity, assessed with molecular tools, (2) the gene functions described to decipher the biology of the amoebae and (3) their interactions with other microorganisms in the environment.
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Affiliation(s)
- Ascel Samba-Louaka
- Laboratoire Ecologie et Biologie des Interactions (EBI), Equipe Microbiologie de l'Eau, Université de Poitiers, UMR CNRS 7267, 1 rue Georges Bonnet, TSA51106, 86073 POITIERS Cedex 9, France
| | - Vincent Delafont
- Laboratoire Ecologie et Biologie des Interactions (EBI), Equipe Microbiologie de l'Eau, Université de Poitiers, UMR CNRS 7267, 1 rue Georges Bonnet, TSA51106, 86073 POITIERS Cedex 9, France
| | - Marie-Hélène Rodier
- Laboratoire Ecologie et Biologie des Interactions (EBI), Equipe Microbiologie de l'Eau, Université de Poitiers, UMR CNRS 7267, 1 rue Georges Bonnet, TSA51106, 86073 POITIERS Cedex 9, France
- Laboratoire de Parasitologie et Mycologie, CHU La Milétrie, 2 rue de la Milétrie, 86021 Poitiers Cedex, France
| | - Estelle Cateau
- Laboratoire Ecologie et Biologie des Interactions (EBI), Equipe Microbiologie de l'Eau, Université de Poitiers, UMR CNRS 7267, 1 rue Georges Bonnet, TSA51106, 86073 POITIERS Cedex 9, France
- Laboratoire de Parasitologie et Mycologie, CHU La Milétrie, 2 rue de la Milétrie, 86021 Poitiers Cedex, France
| | - Yann Héchard
- Laboratoire Ecologie et Biologie des Interactions (EBI), Equipe Microbiologie de l'Eau, Université de Poitiers, UMR CNRS 7267, 1 rue Georges Bonnet, TSA51106, 86073 POITIERS Cedex 9, France
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Valero P, Verbel M, Silva-Agredo J, Mosteo R, Ormad MP, Torres-Palma RA. Electrochemical advanced oxidation processes for Staphylococcus aureus disinfection in municipal WWTP effluents. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 198:256-265. [PMID: 28475964 DOI: 10.1016/j.jenvman.2017.04.070] [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: 12/21/2016] [Accepted: 04/23/2017] [Indexed: 05/03/2023]
Abstract
This paper presents the Staphylococcus aureus inactivation in a simulated wastewater treatment plant effluent by different electrochemical techniques, including the photo-electro-Fenton process. S. aureus, dissolved organic carbon (DOC), total oxidants and H2O2 concentrations, as well as pH, were monitored during the assays. An electrolytic cell, including a UVA lamp, a gas diffusion electrode (GDE) as cathode and an IrO2 anode, was used to conduct the experiments under galvanostatic conditions (20 mA). Low inactivation (-0.4) and low DOC removal were achieved within 120 min when applying the GDE-IrO2 system, in which bacteria disinfection was caused by the generated H2O2. When light was combined with GDE-IrO2, the process efficiency noticeably increased (-3.7 log inactivation) due to the synergistic effect between UVA and H2O2. Introducing iron (5 mg L-1 Fe2+) into the system also produced higher disinfection and DOC mineralization. The electro-Fenton process (GDE-IrO2+Fe2+) led to a bacterial reduction of -0.9 log units and DOC reduction of 14%, while with the photo-electro-Fenton process (GDE-IrO2+UVA + Fe2+) -5.2 units of bacteria and 26% of DOC were removed. Increasing the current intensity (20 mA, 30 mA and 40 mA) in the photo-electro-Fenton system increased H2O2 production and, consequently, augmented the bacterial inactivation (-5.2 log, -6.2 log and -6.5 log, respectively). However, mineralization extent slightly increased or remained practically the same. When comparing the influence of Fe2+ and Fe3+ on photo-electro-Fenton, similar S. aureus inactivation was observed, while DOC removal was higher with Fe2+ (31%) than with Fe3+ (19%). Finally, by testing the system with a Ti anode, the direct anodic oxidation contribution of the IrO2 anode was identified as negligible.
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Affiliation(s)
- Pilar Valero
- Grupo Calidad y Tratamiento de Aguas, Departamento de Ingeniería Química y Tecnologías del Medio Ambiente, Universidad de Zaragoza, Calle María de Luna 3, 50018 Zaragoza, Spain
| | - Martha Verbel
- Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Javier Silva-Agredo
- Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Rosa Mosteo
- Grupo Calidad y Tratamiento de Aguas, Departamento de Ingeniería Química y Tecnologías del Medio Ambiente, Universidad de Zaragoza, Calle María de Luna 3, 50018 Zaragoza, Spain
| | - Maria P Ormad
- Grupo Calidad y Tratamiento de Aguas, Departamento de Ingeniería Química y Tecnologías del Medio Ambiente, Universidad de Zaragoza, Calle María de Luna 3, 50018 Zaragoza, Spain
| | - Ricardo A Torres-Palma
- Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, UdeA, Calle 70 No. 52-21, Medellín, Colombia.
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Mosteo R, Goñi P, Miguel N, Abadías J, Valero P, Ormad MP. Bioaccumulation of pathogenic bacteria and amoeba by zebra mussels and their presence in watercourses. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:1833-1840. [PMID: 26400243 DOI: 10.1007/s11356-015-5418-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Accepted: 09/14/2015] [Indexed: 06/05/2023]
Abstract
Dreissena polymorpha (the zebra mussel) has been invading freshwater bodies in Europe since the beginning of the nineteenth century. Filter-feeding organisms can accumulate and concentrate both chemical and biological contaminants in their tissues. Therefore, zebra mussels are recognized as indicators of freshwater quality. In this work, the capacity of the zebra mussel to accumulate human pathogenic bacteria and protozoa has been evaluated and the sanitary risk associated with their presence in surface water has also been assessed. The results show a good correlation between the pathogenic bacteria concentration in zebra mussels and in watercourses. Zebra mussels could therefore be used as an indicator of biological contamination. The bacteria (Escherichia coli, Enterococcus spp., Pseudomonas spp., and Salmonella spp.) and parasites (Cryptosporidium oocysts and free-living amoebae) detected in these mussels reflect a potential sanitary risk in water.
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Affiliation(s)
- R Mosteo
- Department of Chemical Engineering and Environmental Technologies, EINA, University of Zaragoza, C/María Luna, 3, 50018, Zaragoza, Spain.
| | - P Goñi
- Area of Parasitology, Department of Microbiology, Preventive Medicine and Public Health, Faculty of Medicine, University of Zaragoza, C/Domingo Miral s/n, 50009, Zaragoza, Spain
| | - N Miguel
- Department of Chemical Engineering and Environmental Technologies, EINA, University of Zaragoza, C/María Luna, 3, 50018, Zaragoza, Spain
| | - J Abadías
- Department of Chemical Engineering and Environmental Technologies, EINA, University of Zaragoza, C/María Luna, 3, 50018, Zaragoza, Spain
| | - P Valero
- Department of Chemical Engineering and Environmental Technologies, EINA, University of Zaragoza, C/María Luna, 3, 50018, Zaragoza, Spain
| | - M P Ormad
- Department of Chemical Engineering and Environmental Technologies, EINA, University of Zaragoza, C/María Luna, 3, 50018, Zaragoza, Spain
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Effects of Environmental Factors on the Disinfection Performance of a Wastewater Stabilization Pond Operated in a Temperate Climate. WATER 2015. [DOI: 10.3390/w8010005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Rodríguez-Chueca J, Mediano A, Ormad MP, Mosteo R, Ovelleiro JL. Disinfection of wastewater effluents with the Fenton-like process induced by electromagnetic fields. WATER RESEARCH 2014; 60:250-258. [PMID: 24867601 DOI: 10.1016/j.watres.2014.04.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 04/07/2014] [Accepted: 04/19/2014] [Indexed: 06/03/2023]
Abstract
This research work is focused on the application and assessment of effectiveness of the Fenton-like processes induced by radiofrequency for the inactivation of faecal bacteria (Escherichia coli and Enterococcus sp.) present in treated urban wastewater effluents. Fenton processes were carried out at near neutral pH (pH 5) with different iron sources, such as iron salts (ferric chloride, 5, 50 and 100 mg/L Fe(3+)), magnetite (1 g/L) and clay (80 g/L), hydrogen peroxide (25 mg/L) and in absence and presence of radiofrequency. Two different electromagnetic field intensities (1.57 and 3.68 kA/m) were used in Fenton processes induced by radiofrequency. Different agents used in the Fenton processes induced by electromagnetic fields (iron source, hydrogen peroxide and RF) were analyzed individually and in combination under the same experimental conditions. First assays of ferromagnetic material/H2O2/radiofrequency processes achieved promising results in terms of bacterial inactivation. For instance, Fe(3+)/H2O2/Radiofrequency achieved a maximum level of E. coli inactivation of 3.55 log after 10 min of treatment. These results are higher than those obtained in absence of radiofrequency. The thermal activation of iron atoms allows the Fenton reaction to intensify, increasing the final yield of the treatment. On the other hand, different behavior was observed in the inactivation of E. coli and Enterococcus sp. due to the structural differences between Gram-negative and Gram-positive bacteria.
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Affiliation(s)
- J Rodríguez-Chueca
- Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, 3, María de Luna street, 50018 Zaragoza, Spain.
| | - A Mediano
- Department of Electrical and Electronic Engineering, University of Zaragoza, 1 María de Luna Street, 50018 Zaragoza, Spain.
| | - M P Ormad
- Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, 3, María de Luna street, 50018 Zaragoza, Spain.
| | - R Mosteo
- Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, 3, María de Luna street, 50018 Zaragoza, Spain.
| | - J L Ovelleiro
- Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, 3, María de Luna street, 50018 Zaragoza, Spain.
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