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Clairmont LK, Coristine A, Stevens KJ, Slawson RM. Factors influencing the persistence of enteropathogenic bacteria in wetland habitats and implications for water quality. J Appl Microbiol 2020; 131:513-526. [PMID: 33274572 DOI: 10.1111/jam.14955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/12/2020] [Accepted: 11/29/2020] [Indexed: 11/28/2022]
Abstract
AIMS To better understand the persistence dynamics of enteropathogenic bacteria in freshwater wetland habitats, we constructed lab-scale mesocosms planted with two different wetland plant species using a subsurface flow wetland design. Mesocosms were treated with either a high-quality or a poor-quality water source to examine the effects of water quality exposure and plant species on Escherichia coli, Salmonella spp. and Enterococcus spp. in the rhizoplane, rhizosphere and water of wetland habitats. METHODS AND RESULTS Quantities of study micro-organisms were detected using real-time PCR in wetland mesocosms. A combination of molecular and culture-based methods was also used to enumerate these organisms from surface water and plant material at high, medium and poor water quality sites in the field. We found that all three enteropathogenic micro-organisms were influenced by microhabitat type and plant species. Organisms differed with respect to their predominant microhabitat and the extent of persistence associated with wetland plant species in the mesocosm study. Of the monitored pathogens, only E. coli was influenced by both water quality treatment and plant species. Salmonella spp. quantities in the rhizoplane consistently increased in all treatments over the course of the mesocosm experiment. CONCLUSIONS Plant species selection appears to be an overlooked aspect of constructed wetland design with respect to the removal of enteropathogenic micro-organisms. Escherichia coli and Enterococcus concentrations in wetland outflow were significantly different between the two plant species tested, with Enterococcus concentrations being significantly higher in mesocosms planted with Phalaris arundinaceae and E. coli concentrations being higher in mesocosms planted with Veronica anagallis-aquatica. Furthermore, there is evidence that the rhizoplane is a significant reservoir for Salmonella spp. within wetland habitats. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first time that Salmonella spp. has been shown to proliferate under natural conditions within the rhizoplane. This will contribute to our understanding of wetland removal mechanisms for enteropathogenic bacteria. This study identifies the rhizoplane as a potentially important reservoir for human pathogenic micro-organisms and warrants additional study to establish whether this finding is applicable in non-wetland habitats.
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Affiliation(s)
| | - A Coristine
- Wilfrid Laurier University, Waterloo, ON, Canada
| | - K J Stevens
- Wilfrid Laurier University, Waterloo, ON, Canada
| | - R M Slawson
- Wilfrid Laurier University, Waterloo, ON, Canada
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Hamad MTMH. Comparative study on the performance of Typha latifolia and Cyperus Papyrus on the removal of heavy metals and enteric bacteria from wastewater by surface constructed wetlands. CHEMOSPHERE 2020; 260:127551. [PMID: 32683013 DOI: 10.1016/j.chemosphere.2020.127551] [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: 04/15/2020] [Revised: 06/08/2020] [Accepted: 06/27/2020] [Indexed: 06/11/2023]
Abstract
Semi-arid countries continue to face water scarcity, especially with the current global climatic changes. This scarcity has continuously increased over the last five decades in countries like Egypt, Syria, Libya and Jordan, where the agriculture sector consumes more than 85% of the country's water resources. The problem of water scarcity in Egypt is further challenged by high levels of urbanization, increasing industrial uses, and the high cost of advanced treatment processes. These challenges lead to the utilization of untreated or poorly treated wastewater for irrigation of agricultural crop fields. Thus, the current study proposes the use of an eco-friendly technology consisting of a constructed wetland planted with Typha latifolia and Cyperus papyrus supported with zeolite substrate for water purification, to curb this challenge. The results showed that, the removal efficiency of COD, BOD, TSS, and ammonia were 68.5%, 71%, 70%, and 82.3%, respectively by Typha latifolia bed. On the other hand, the removal efficiency of COD, BOD, TSS and ammonia were 85.5%, 86.2%, 83.9% and 92.3% respectively by Cyperus papyrus bed. As a result, bacteriological parameters were reduced to 99.9%, and complete removal of Salmonella sp was achieved during three days by Cyperus papyrus. Box-Behnken design was utilized to optimize independent factors, including contact time (24-72h) and initial concentration of metals (15-45 mg L-1) and their responses. The removal efficiency of Cu and Zn were 72% and 84%, respectively of the optimum reaction time (72 h), with 16 plant stems and an initial metal concentration of 15 mg L-1.
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Affiliation(s)
- Mohammed T M H Hamad
- Central Laboratory for Environmental Quality Monitoring (CLEQM), National Water Research Center (NWRC), Cairo, Egypt.
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Gaballah MS, Abdelwahab O, Barakat KM, Aboagye D. A novel horizontal subsurface flow constructed wetland planted with Typha angustifolia for treatment of polluted water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:28449-28462. [PMID: 32418087 DOI: 10.1007/s11356-020-08669-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
Rapid population growth and urbanization has put a lot of stress on existing water bodies in most developing countries such as the Marriott Lake of Egypt. Three constructed wetland configurations including Typha angustifolia planted with enhanced atmospheric aeration by using perforated pipes networks (CWA), planted without perforated pipe network (CWR), and a control non-planted and without perforated pipes wetland (Control) were used in the study. Changes in physicochemical properties and microbial community over four seasons and hydraulic loading rate (HLR) (50, 100, 200, 300, and 400 L day-1 m-1) were monitored using influent from Marriott Lake in Egypt. Overall, the removal performance followed the sequence CWA>CWR>control. Turbidity removal of 98.4%; biochemical oxygen demand (BOD5) removal of 83.3%; chemical oxygen demand (COD) removal of 95.8%; NH3-N removal of 99.9%; total nitrogen (TN) removal of 94.7%; NO3--N and NO2--N increased; total P (TP) removal of 99.7%, Vibrio sp. of 100%, Escherichia coli 100%; total bacterial count of 92.3%; and anaerobic bacteria reduction of 97.5% were achieved by using CWA. Seasonal variation and variation in HLRs had significant effect on performance. The modified planted CWA system enhances the removal of pollutants and could present a novel route for reducing the cost associated with integrating artificial aeration into wetlands.
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Affiliation(s)
- Mohamed S Gaballah
- Environmental Division, National Institute of Oceanography and Fisheries, Alexandria, 21544, Egypt
| | - Ola Abdelwahab
- Environmental Division, National Institute of Oceanography and Fisheries, Alexandria, 21544, Egypt.
| | - Khouloud M Barakat
- Environmental Division, National Institute of Oceanography and Fisheries, Alexandria, 21544, Egypt
| | - Dominic Aboagye
- College of Engineering (Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing, 100083, People's Republic of China
- Department of Agricultural and Bio-systems Engineering, Makerere University, P. O. Box 7062, Kampala, Uganda
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Chiudioni F, Marcheggiani S, Puccinelli C, Mancini L. Interaction between bacterial enteric pathogens and aquatic macrophytes. Can Salmonella be internalized in the plants used in phytoremediation processes? INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2020; 23:18-25. [PMID: 32634324 DOI: 10.1080/15226514.2020.1786797] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The environment is considered a reservoir of pathogens and a possible source of infection for animals and humans. The association between enteric pathogens and food plants has been demonstrated in several studies, while few studies have addressed possible interactions between human pathogens and aquatic plants. This study, performed by setting mesocosms, evaluates the interaction between an enteric pathogen (Salmonella enterica serovar Napoli, S. Napoli) and a macrophyte (Phragmites australis (Cav.) Trin. ex Steudel) and the possible ability of the bacterium to internalize into the plant. The results show that S. Napoli concentration decreased gradually in growth solution without plants (control) while it was able to persist adhering to submerged parts of plants in treated mesocosms. The adhesion of the bacterium remained stable for 20 days, then decreased gradually until the end of the experiment. In addition, S. Napoli was able to internalize and colonize stems and leaves. In conclusion, the study suggests that macrophytes can represent an alternative environmental reservoir of pathogens for humans and animals. The adhesion to roots and rhizomes and the internalization could contribute to the bacterial persistence in the aquatic ecosystems by playing an important role in ecology and transmission of pathogens.
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Affiliation(s)
- Filippo Chiudioni
- Department of Enviroment and Health, Istituto Superiore di Sanità (ISS), Rome, Italy
| | - Stefania Marcheggiani
- Department of Enviroment and Health, Istituto Superiore di Sanità (ISS), Rome, Italy
| | - Camilla Puccinelli
- Department of Enviroment and Health, Istituto Superiore di Sanità (ISS), Rome, Italy
| | - Laura Mancini
- Department of Enviroment and Health, Istituto Superiore di Sanità (ISS), Rome, Italy
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Abstract
The role of aquatic plants in treating wastewater contaminated with inorganic and organic pollutants is well established. Recent studies have shown that aquatic plants possess potential to remove pathogens from wastewater. High removal (90%) of pathogenic microbes such as Enterococci, Escherichia coli, Klebsiella pneumonia, Pseudomonas aeruginosa, Clostridium perfringens, Staphylococcus aureus, and Salmonella have been achieved using aquatic plant species viz. Typha latifolia, Cyperus papyrus, Cyperus alternifolius, Phragmites mauritianus, Pistia stratiotes, Lemna paucicostata, Spirodela polyrhiza, Eichhornia crassipes. Pathogen removal by aquatic plants mainly occurs because of toxicity exerted by exudates produced by them or attachment of pathogens to plant roots followed by filtration. Constructed wetlands have proved very efficient in treating pathogen-contaminated water. More studies are required to find out the exact mechanism of pathogen removal by these plants so that their role in phytoremediation technologies can be emphasized.
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Fletcher J, Willby N, Oliver DM, Quilliam RS. Phytoremediation Using Aquatic Plants. CONCEPTS AND STRATEGIES IN PLANT SCIENCES 2020. [DOI: 10.1007/978-3-030-00099-8_7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Shingare RP, Thawale PR, Raghunathan K, Mishra A, Kumar S. Constructed wetland for wastewater reuse: Role and efficiency in removing enteric pathogens. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 246:444-461. [PMID: 31200179 DOI: 10.1016/j.jenvman.2019.05.157] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 05/30/2019] [Accepted: 05/31/2019] [Indexed: 06/09/2023]
Abstract
Water stress has become a perennial concern in most of the developing countries due to rapid urbanization and population growth. As the growing population requires more fresh water and better ways for wastewater disposal, the demand for wastewater reclamation has increased drastically in recent years. Wastewater, either raw or treated, is being widely used for agricultural irrigation in developing countries, which cause a serious threat to human health mainly because of its pathogenic content. One of the alternative methods to treat wastewater and make it reusable for agricultural irrigation is to implement constructed wetland (CW); a sustainable and cost-effective technology that is applicable for the elimination of both pollutants and pathogens from wastewater. Despite its wide application, the role of macrophytes that form an integral part of CW and specific mechanisms involved in pathogen removal by them is still barely understood due to complexities involved and influencing factors. This has, therefore, attracted various scientific studies to reveal further functional mechanisms involved in vegetated CW to increase its proficiencies. This review paper illustrates the comparative studies of different CW and their pathogen removal efficiencies with major emphasis on macrophytes involved and factors influencing related mechanism. Further, the paper also covers detailed information on the enteric pathogens present in wastewater and the associated health risks involved in its reuse. The ultimate objective is to further clarify the role of CW in enteric pathogen removal and its efficiency for wastewater purification in perspective with safe reuse in agriculture.
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Affiliation(s)
- Rita P Shingare
- Environmental Biotechnology and Genomics Division, India; Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Ghaziabad, Uttar Pradesh, 201 002, India.
| | | | - Karthik Raghunathan
- Environmental Biotechnology and Genomics Division, India; Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Ghaziabad, Uttar Pradesh, 201 002, India
| | - Apurva Mishra
- Environmental Biotechnology and Genomics Division, India; Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Ghaziabad, Uttar Pradesh, 201 002, India
| | - Sunil Kumar
- Technology Development Centre, CSIR-National Environmental Engineering Research Institute, Nehru Marg, Nagpur, 440 020, Maharashtra, India; Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Ghaziabad, Uttar Pradesh, 201 002, India
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Shingare RP, Nanekar SV, Thawale PR, Karthik R, Juwarkar AA. Comparative study on removal of enteric pathogens from domestic wastewater using Typha latifolia and Cyperus rotundus along with different substrates. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2017; 19:899-908. [PMID: 28318301 DOI: 10.1080/15226514.2017.1303809] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A comparative study was carried out to evaluate the efficiency of different substrate materials along with macrophytes Typha latifolia and Cyperus rotundus in treating domestic wastewater intended for reuse in agriculture. The study was conducted over a period of 6 months with different retention times, and observations were taken twice per month. One-way analysis of variance and Tukey's Honest Significant Difference (HSD) tests were used to determine statistical significant differences between experimental columns. Treatment with T. latifolia planted in sand and mix substrate with 4-day retention time remarkably reduced the concentration of all bacterial pathogens. Log reductions observed were approximately 5.01 and 4.82 for total coliform (TC), 4.46 and 3.93 for Escherichia coli, and 5.52 and 5.48 for Shigella, respectively. Moreover, these treatments were also efficient in completely removing fecal coliform (FC) and Salmonella.Maximum parasites were removed by the treatment having sand alone as a substrate containing C. rotundus, but the difference was not significant from those planted with T. latifolia in the same substrate. The results suggest that T. latifolia aids in bacterial pathogens removal, while C. rotundus aids in parasites removal. Thus, wastewater treatment through constructed wetland having mix plantation of these species along with sand can eliminate some of the major enteric pathogens.
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Affiliation(s)
- Rita P Shingare
- a Ecosystem Division , CSIR-National Environmental Engineering Research Institute , Nagpur , Maharashtra , India
| | - Sneha V Nanekar
- a Ecosystem Division , CSIR-National Environmental Engineering Research Institute , Nagpur , Maharashtra , India
| | - Prashant R Thawale
- a Ecosystem Division , CSIR-National Environmental Engineering Research Institute , Nagpur , Maharashtra , India
| | - R Karthik
- a Ecosystem Division , CSIR-National Environmental Engineering Research Institute , Nagpur , Maharashtra , India
| | - Asha A Juwarkar
- a Ecosystem Division , CSIR-National Environmental Engineering Research Institute , Nagpur , Maharashtra , India
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Ofred JM, Robinson HM, Lughano JMK, Anita F, Anders D. Removal of Escherichia coli in treated wastewater used for food production in Morogoro, Tanzania. ACTA ACUST UNITED AC 2016. [DOI: 10.5897/ajmr2016.8156] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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