water microbial testing Articles

Broader incubation temperature tolerances for microbial drinking water testing with enzyme substrate tests

Microbiological testing is an integral part of measures to ensure safe drinking water. However, testing can be restricted in low-resource settings by the requirement for specialized laboratory facilities and testing procedures. Precisely controlled incubation temperature is one example. The effect of varied incubation temperatures on the performance of two enzyme substrate tests for the ...

Mar. 18, 2014

By IWA Publishing

Bioflocculation behaviours of microbial communities in water treatment

We studied the flocculation behaviours of microbial communities in 21 soil, wastewater and activated sludge samples to clarify the effects of culture medium types on flocculation ability and screening efficiency, and to analyze diverse functions and microbial compositions. The bioflocculants produced by 33% of the microbial communities had flocculating efficiencies higher than 90%. ...

Feb. 25, 2014

By IWA Publishing

Well water quality in rural Nicaragua using a low-cost bacterial test and microbial source tracking

Water-related diseases, particularly diarrhea, are major contributors to morbidity and mortality in developing countries. Monitoring water quality on a global scale is crucial to making progress in terms of population health. Traditional analytical methods are difficult to use in many regions of the world in low-resource settings that face severe water quality issues due to the inaccessibility ...

Dec. 9, 2015

By IWA Publishing

Development of Water Quality Test Kit Based on Substrate Utilization and Toxicity Resistance in River Microbial Communities

Methods for measuring toxicity or respiratory activity of microbial cultures can be used as tools for assessing the presence of chemicals and their impact on the streams. The proposed toxicity test is based on the respirometric characteristics of the bacteria according to the principals of Biolog’s microplate system. As the microorganism ...

Feb. 28, 2007

By University of Tehran

Hand-pumps as reservoirs for microbial contamination of well water

The retention and release of total coliforms and Escherichia coli was investigated in hand-pumps removed from tubewells tapping a faecally contaminated aquifer in Matlab, Bangladesh, and from a new hand-pump deliberately spiked with E. coli. All hand-pumps were connected to reservoirs of sterile water and flushed. Faecal coliforms were observed in the discharge from all three of ...

Nov. 30, 2011

By IWA Publishing

An improved method for determining microbially available phosphorus in drinking water

Microbially available phosphorus (MAP) is the labile phosphorus that is readily assimilated by microorganisms, which is linearly correlated to bacterial re-growth in drinking water in some regions. The conventional MAP bioassay for drinking water was originally developed by Markku based on the growth potential of Pseudomonas fluorescens P17 (P17). However, the bioassay bears some demerits, ...

Mar. 14, 2016

By IWA Publishing

Get Schooled in Water Safety and Microbial Monitoring with LuminUltra Academy

It’s not often you come across a company so committed to educating its customers and partners that it develops an entire suite of training courses, but that’s exactly what led to the creation of LuminUltra Academy. Access to this new, web-based training and certification center ...

Feb. 7, 2017

By LuminUltra Technologies Ltd.

Quantitative analysis of microbial contamination in private drinking water supply systems

Over one million households rely on private water supplies (e.g. well, spring, cistern) in the Commonwealth of Virginia, USA. The present study tested 538 private wells and springs in 20 Virginia counties for total coliforms (TCs) and Escherichia coli along with a suite of chemical contaminants. A logistic regression analysis was used to investigate potential correlations between TC ...

May 23, 2013

By IWA Publishing

Evaluation of microbial source tracking methods using mixed fecal sources in aqueous test samples

Untitled Document ...

Dec. 31, 2002

By Southern California Coastal Water Research Project Authority (SCCWRP)

Urban water reuse: microbial pathogens control by direct filtration and ultraviolet disinfection

Physicochemical treatment efficiency for unrestricted urban water reuse was evaluated at a conventional activated-sludge wastewater treatment plant (WWTP). Pilot plant set-up consisted of an alum coagulation step, granular media upflow flocculation and direct downflow dual-media filtration followed by ultraviolet disinfection (dose of 95 mJ cm−2). Optimum aluminum sulfate dosage of 10 mg ...

Sep. 24, 2014

By IWA Publishing

Collection system aeration and the microbial benefits

In late 2015 Reliant Water Technologies introduced the Wet Well Wizard, an aeration tool for the wet wells in collection systems. During 14 months of field testing the patent pending Wizard System, the primary objectives were to eliminate FOG (fat, oil and grease) caps and to reduce H2S, eliminating it if possible. All trials were proven excellent with very few changes to the product that ...

Apr. 18, 2017

By Reliant Water Technologies

Microbial quality and bacteria pathogens in private wells used for drinking water in northeastern Ohio

In agricultural intensive areas, drinking contaminated water from private wells is considered an important cause of acute gastroenteric illnesses (AGI), particularly among high-risk populations. In the summer of 2009, the microbial water quality of 180 randomly selected private wells in two northeastern Ohio counties, a region with a high concentration of dairy farms, was assessed. Forty-five ...

Aug. 27, 2013

By IWA Publishing

Biosolids sampling and handling approaches for microbial analyses

ABSTRACT The protection of human health and the environment while making the use of biosolids products more practical is a joint goal of utilities and regulatory agencies. Assuring the safety of biosolids is paramount to gaining wide public acceptance of this waste-to-beneficial use product. Making effective decisions about the safety of biosolids use relies on quality data. Satisfying ...

Oct. 12, 2007

By Water Environment Federation (WEF)

Microbial source tracking and spatial analysis of <italic>E. coli</italic> contaminated private well waters in southeastern Ontario

Microbial source tracking and spatial analysis of E. coli contaminated private well waters in southeastern Ontario

Private water supplies, which are the primary source of drinking water for rural communities in developed countries, are at risk of becoming fecally contaminated. It is important to identify the source of contamination in order to better understand and address this human health risk. Microbial source tracking methods using human, bovine and general Bacteroidales markers were performed on 716 ...

Jun. 17, 2014

By IWA Publishing

Microbial reporter gene assay as a diagnostic and early warning tool for the detection and characterization of toxic pollution in surface waters

Surface water samples constantly receive a vast mixture of micropollutants mainly originating from waste water treatment plants (WWTPs). High throughput live cell arrays provide a promising method for the characterization of the effects of chemicals and the associated molecular mechanisms. In the present study this test system was evaluated for the first time for the characterization of a set ...

May 28, 2015

By John Wiley & Sons, Ltd.

Norwegian study on microbial source tracking for water quality control and pollution removal in constructed wetland treating catchment run-off

This study describes the first Norwegian microbial source tracking (MST) approach for water quality control and pollution removal from catchment run-off in a nature-based treatment system (NBTS) with a constructed wetland. The applied MST tools combined microbial analyses and molecular tests to detect and define the source(s) and dominant origin(s) of faecal water contamination. Faecal ...

May 18, 2017

By IWA Publishing

Culture-based indicators of fecal contamination and molecular microbial indicators rarely correlate with <italic>Campylobacter</italic> spp. in recreational waters

Culture-based indicators of fecal contamination and molecular microbial indicators rarely correlate with Campylobacter spp. in recreational waters

Campylobacter spp. are the leading cause of gastroenteritis worldwide. Most human infections result from contaminated food; however, infections are also caused by recreational waterway contamination. Campylobacter culture is technically challenging and enumeration by culture-based methods is onerous. Thus, we employed qPCR to quantify Campylobacter spp. in fresh- ...

Nov. 30, 2011

By IWA Publishing

Contaminated Water

Treatment of Contaminated Mine Water Discharge Recent estimates have suggested that in the UK 2,500 km of streams and an area of 9,000 km2 of groundwater bodies are at risk of failure of Water Framework Directive Objectives due to mine water pollution (Jarvis & Rees 2004). For over two decades the Loughor Estuary in South Wales, which carries SSSI status, had been ...

Nov. 30, 2012

By BritishFlora

Efficacy of a ceramic siphon household water filter for removal of pathogenic microorganisms: lifespan volume test

Treatment of drinking water at the point of use (POU) has demonstrated health benefits for people who have access only to microbially contaminated drinking water. In this work, the ceramic siphon POU water filter was evaluated for its ability to reduce indicator microorganisms in test waters. During batch challenge tests, the filter reduced Escherichia coli in filtered water by 7 log10 ...

May 31, 2011

By IWA Publishing

Microbial technology applications in wellbore stimulation and oil recovery enhancement: a review

The different microbial technologies to enhance oil recovery have not yet been proven for two main reasons. Firstly, most microbial enhanced oil recovery (MEOR) field trials lack structured research methodology. Secondly, it is difficult to interpret MEOR tests. In order to correlate qualitatively the effects on oil recovery with the nutrient injections, other variables should be kept constant ...

Dec. 30, 2009

By Inderscience Publishers

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