Coliform Articles
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Potentially pathogenic bacteria isolated from different tropical waters in Sri Lanka
This study investigated the bacteriological contamination of different water sources in Sri Lanka. Source waters (n = 74) including bottled water, well water and surface water were assessed for enumerating total coliforms and faecal coliforms using the membrane filtration method. The results showed that 18.5 and 14.8% of bottled water samples were contaminated with total coliforms ...
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The predictive value of total coliforms in drinking water using life table analysis
Total coliform monitoring in distribution systems is no longer a required parameter in many countries but is still mandated in Canada and the USA. The value of reporting total coliform results in drinking water is a topic of debate. Total coliform and Escherichia coli results from small drinking water systems tested over a 3-year period in British Columbia were analyzed using life table ...
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Temporal variation and persistence of bacteria in streams
Better understanding of bacterial fate and transport in watersheds is necessary for improved regulatory management of impaired streams. Novel statistical time series analyses of coliform data can be a useful tool for evaluating the dynamics of temporal variation and persistence of bacteria within a watershed. For this study, daily total coliform data for the Little River in East Tennessee from 1 ...
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Coliform Bacteria in Water and Sewage
https://www.yasa.ltd/post/coliform-bacteria-in-water-and-sewage-how-to-remove-it Safe drinking water is essential for maintaining good health. Coliform bacteria serve as indicators of water quality, helping to identify potential risks associated with fecal contamination. Understanding the significance of coliform bacteria and their role in sewage treatment is crucial in ensuring the safety of ...
By YASA ET
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Pathogen removal from domestic and swine wastewater by experimental constructed wetlands
This study examined the performance of subsurface flow horizontal wetlands in total coliforms, faecal coliforms, enterococci and Salmonella removal from swine and domestic wastewaters. The effects of organic loading rate, contact time (CT) and the presence of aquatic macrophytes, Typha dominguensis and Typha latifolia, on treatment performance were evaluated. In general, chemical oxygen demand ...
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Comparison of MI, Chromocult® coliform, and Compass CC chromogenic culture-based methods to detect Escherichia coli and total coliforms in water using 16S rRNA sequencing for colony identification
The MI, Chromocult® coliform, and Compass CC chromogenic culture-based methods used to assess water quality by the detection of Escherichia coli and total coliforms were compared in terms of their specificity and sensitivity, using 16S rRNA sequencing for colony identification. A sewage water sample was divided in 2-μL subsamples for testing by all three culture-based methods. All growing ...
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Riverbank filtration in India – using ecosystem services to safeguard human health
India has great potential to use riverbank filtration (RBF) for drinking water production as an ecosystem service for human health, principally through effective removal of common waterborne pathogens, even during monsoon. Water quality results from site investigations in North India have shown a removal of total and faecal coliform (indicator) bacteria in the range of 1.3 to >5.2 log ...
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Fecal coliform removal in a sulfate reduction, autotrophic denitrification and nitrification integrated (SANI) process for saline sewage treatment
The Sulfate Reduction, Autotrophic Denitrification, Nitrification Integrated (SANI) process has been specially designed to treat saline wastewater. In the process no biological excess sludge is produced. SANI process also has the added advantages of cost and footprint reduction when compared to traditional activated sludge processes. In the SANI pilot plant, the fecal coliform removal efficiency ...
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Summary of Internal Validation of the TECTAlert FCA Method in Wastewater
Technology Type: Advanced System for Fecal Coliform Detection Application: Quantitative Analysis of Fecal Coliforms in Wastewater Technology Name: TECTAlert FCA Company: Pathogen Detection Systems, Inc. Address: 382 King St. East, Kingston, Ontario, Canada K7K 2Y2 Web Site: www.tecta-pds.com The TECTA FCA method is a Fecal Coliform test that can be used on many wastewater samples, such ...
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Coliform status of water bodies from two districts in Ghana, west Africa: implications for rural water resources management
Investigations were conducted on the total and faecal coliform status of streams, hand-dug wells and boreholes highly patronised by communities in the West Akim and Kwaebibirem Districts, Eastern Ghana. Total coliform values obtained range from 60–2,672 cfu, 0–680 cfu and 0–128 cfu for streams, hand-dug wells and boreholes, respectively. Faecal coliform values similarly range from 31–1,988 cfu, ...
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Molecular techniques and data integration: investigating distribution system coliform events
A retrospective analysis of coliform events in a drinking water distribution system was conducted. A total of 13 coliform isolates with specific geographic/sampling records were analysed using microbial source tracking (MST) to establish genetic (based on DNA) and phenotypic (based on substrate utilization) relatedness between isolates, and a data integration approach (geo-spatial and event ...
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Performance of modified design pond sand filters
Two pond sand filters (PSFs) with modified design were constructed in Pathorghata Upazila of Barguna District located in southern Bangladesh. Performance assessment of the PSFs was done after commissioning in terms of quality of filtered water, ease of operation and maintenance, monthly check-up of production capacity/efficiency of the filters, users' participation and acceptability of the ...
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Performance assessment of modified biosand filter with an extra disinfection layer
Biosand filters (BSFs) have been used widely as an efficient, inexpensive, and appropriate point-of-use technology. Several organizations are promoting filters without adequate testing, which may not lead to sufficiently safe devices. The objective of this study was to evaluate the performance of a modified biosand filter (MBSF) with an extra disinfection layer (brass or zero valent iron ...
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An investigation into the effectiveness of sand media amended with biochar to remove BOD5, suspended solids and coliforms using wetland mesocosms
Constructed wetland ecotechnologies (CWEs) are a promising solution to effectively treat domestic wastewater in developing countries at low cost. This paper reports the findings of the effectiveness of sand media amended with woody biochar and two plants species (Melaleuca quinquenervia and Cymbopogon citratus) in removing biological oxygen demand (BOD5), suspended solids and coliforms. The ...
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Specificity of a defined substrate method used to monitor balneability of tropical coastal waters impacted by polluted stormwater
Defined substrate (DS) is an alternative technique to monitoring the water quality based on species-specific enzyme activity. Although more sensitive and more specific than traditional media, there is some controversy over use in the warmer waters of tropical and subtropical environments, rich in organic matter and microorganism groups capable of interfering with results. The aim of this study ...
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The Effects That Well Depth and Wellhead Protection Have on Bacterial Contamination of Private Water Wells in the Estes Park Valley, Colorado
Over the past five years, it is estimated that 10% of residential water wells have tested positive for total coliform and 2% for E.coli bacteria in the Estes Park Valley, Colorado. Many of these water wells are shallow or hand-dug in construction. In this study, samplings of 30 private untreated water wells were tested for total coliform bacteria in the Estes Park Valley. Water wells were ...
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Bacteroides bacteria and their bacteriophages
There are many sources that can contribute to fecal contamination in water bodies such as domestic wastewaters, wastewater treatment plants, husbandry and farms. Coliform bacteria are a group of bacteria that inhabit in the digestive tracts of human and warm-blooded animals. It can be found in human and animal feces. Therefore, the presence of coliform bacteria can indicate fecal contamination, ...
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Rainwater harvesting in schools in Taiwan: system characteristics and water quality
In order to understand the current status of rainwater harvesting (RWH) practices in Taiwan's schools, a study was carried out to examine the RWH system performance, water usage, and water quality in these sites. A total of 29 schools in various regions were selected for this investigation, including 7 in the northern, 7 in the central, 8 in the southern, and 7 in the eastern regions of Taiwan. ...
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Evaluation of USEPA Time-Temperature Requirement for Escherichia coli Destruction by Standard Culture Method and Flow Cytometry
USEPA time-temperature requirements for fecal coliform destruction were evaluated by both the standard culture method and flow cytometry to investigate if insufficient thermal treatment was the reason for fecal coliforms reactivation observed in a field digester. Results showed that complete inactivation (8-log) of cells can be achieved well below the regulatory requirement. Destruction was found ...
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Significance of indicator bacteria in a regionalised wastewater treatment plant and receiving waters
A regional wastewater treatment plant was found to be discharging high concentrations of fecal coliform bacteria in excess of acceptable surface water criteria. An investigation of the sources of those bacteria showed their origins to have been environmental, primarily from a pulp and paper mill. False positive and false negative fecal coliforms were also found and enumerated. These bacteria were ...
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