Showing results for: Coliform monitoring Articles
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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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The effect of operating parameters on the performance of a biosand filter: a statistical experiment design approach
The influence of three important parameters, namely, pause time, charge volume and influent turbidity on the performance of a biosand filter (BSF) was assessed by employing response surface methodology with a Box-Behnken design. Fifteen runs were conducted in triplicate using a full-scale BSF with a pore volume of 19.6 L, and the performance of the filter was assessed by monitoring total ...
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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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Summary of Evaluation of Techniques for Measuring Microbial Hazards in Bathing Waters: A Comparative Study
Technology Type: Advanced System for Coliform and E.coli Detection Application: Analysis of Coliforms and E.coli in Remote Site Waters Technology Name: TECTA B16 Company: Pathogen Detection Systems, Inc. Address: 382 King St. East, Kingston, Ontario, Canada K7K 2Y2 Web Site: www.tecta-pds.com This is a fully external evaluation of the TECTA B16 advanced system against a conventional ...
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Water quality and microbial diversity in cisterns from semiarid areas in Brazil
Harvesting rainwater is a common practice worldwide, particularly in areas with no access to a public water supply or insufficient groundwater reserves. More than two million people living in semiarid regions of Brazil consume rainwater stored in cisterns, and little information is available regarding the water quality. Despite the initial good quality of the rainwater, its harvest and storage ...
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Quantification and characterization of greywater from schools
Survey of schools of different education levels (primary, intermediate and secondary) in Kuwait showed an average greywater generation rate of 7.3 L/p/d and varied in the range of 2.9 – 16 L/p/d, reflecting the school level of education (i.e. student age). The highest rates were observed for primary schools while the lowest rates were observed in secondary schools where students are more ...
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Estimating changes in river faecal coliform loading using nonparametric multiplicative regression
Faecal coliform (FC) concentration was monitored weekly in the Tangipahoa River over an eight year period. Available USGS discharge and precipitation data were used to construct a nonparametric multiplicative regression (NPMR) model for both forecasting and backcasting of FC density. NPMR backcasting and forecasting of FC allowed for estimation of concentration for any flow regime. During this ...
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Quantification and characterization of greywater from schools
Survey of schools of different education levels (primary, intermediate and secondary) in Kuwait showed an average greywater generation rate of 7.3 L/p/d and varied in the range of 2.9–16 l/p/d, reflecting the school level of education (i.e. student age). The highest rates were observed for primary schools while the lowest rates were observed in secondary schools where students are more mature ...
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Real-Time Faecal Coliform Water Quality Monitoring in Chicago, USA Case Study
Total coliforms, E.coli or faecal coliforms are probably the most important water quality parameters there are for recreational water bodies such as rivers, lakes, water parks or marine bathing waters. However, the decision to allow such water bodies to be fit for recreational activities typically takes 24-72 hours -- when relying on traditional lab testing methods -- after the water sample has ...
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Summary of CEAEQ Validation of the TECTA EC/TC System for Monitoring Water Quality
Technology Type: Advanced System for Coliform and E.coli Detection Application: Analysis of Coliforms and E.coli in Remote Site Waters Technology Name: TECTA B16 Company: Pathogen Detection Systems, Inc. Address: 382 King St. East, Kingston, Ontario, Canada K7K 2Y2 Web Site: www.tecta-pds.com Verification Test Description The use of the TECTA EC/TC method in an accredited laboratory has ...
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Implementing an On-Site Drinking Water Monitoring System in Indigenous Communities Across Canada
Status of Drinking Water in Indigenous Communities Indigenous communities including First Nations reserves across Canada have a notorious history of poor or inconsistent drinking water quality Many communities (55 as of Mar. 25, 2021) are under long-termdrinking water advisories, meaning potable tap water has not been available for several years The Canadian Government has a program to ...
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Virus contamination from operation and maintenance events in small drinking water distribution systems
We tested the association of common events in drinking water distribution systems with contamination of household tap water with human enteric viruses. Viruses were enumerated by qPCR in the tap water of 14 municipal systems that use non-disinfected groundwater. Ultraviolet disinfection was installed at all active wellheads to reduce virus contributions from groundwater to the distribution ...
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Estimation of dead or live bacteria using online Bacteria Activity monitoring - Case Study
The BACTcontrol, a microLAN instrument, measures on-line bacterial enzyme activity in food and aquatic samples. Besides ß-DGlucuronidase, ß-Galactosidase and ß-Glucosidase to measure E.coli, Coliform and Enterococci activity respectively also alkaline phosphatase (ALP) activity is measured to determine Total Activity. The BACTcontrol TA test measures the metabolism activity of ...
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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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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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Microbiological quality of ice and ice machines used in food establishments
The ice used in the food industry has to be safe and the water used in ice production should have the quality of drinking water. The consumption of contaminated ice directly or indirectly may be a vehicle for transmission of pathogenic bacteria to humans producing outbreaks of gastrointestinal diseases. The objective of this study was to monitor the microbiological quality of ice, the water ...
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The biological safety of distribution systems following UV disinfection in rural areas in Beijing, China
In rural areas, UV disinfection has a great potential for drinking water treatment because of the ability to achieve target disinfection levels and the ease of operation and maintenance; however, UV disinfection provides no disinfection residual to the water distribution system. This study examines the biological safety of rural water distribution systems following UV disinfection. The results ...
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Estimated occupational risk from Bioaerosols generated during land application of class B biosolids
Some speculate that bioaerosols from land application of biosolids pose occupational risks, but few studies have assessed aerosolization of microorganisms from biosolids or estimated occupational risks of infection. This study investigated levels of microorganisms in air immediately downwind of land application operations and estimated occupational risks from aerosolized microorganisms. In all, ...
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Occurrence of norovirus and other enteric viruses in untreated groundwaters of Korea
A total of 39 water samples from 23 different groundwater wells in Korea were collected and analyzed in order to monitor the occurrence of norovirus (NoV) and other indicator microbes as the first part of a national survey of groundwater. More than 500 L of untreated groundwater were filtered through 1MDS filters. Following elution and concentration by organic flocculation, PCR and sequence ...
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Use of real-time PCR with propidium monoazide for enumeration of viable Escherichia coli in anaerobic digestion
A combination of propidium monoazide (PMA) with real-time quantitative polymerase chain reaction (PMA-qPCR) was optimized to enumerate only viable Escherichia coli in anaerobic digestion processes. Repeating the PMA treatment twice and a final concentration of 100 μM resulted in an effective exclusion of DNA from heat-treated E. coli cells. In three anaerobic digestion processes, real-time ...
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