Water Microbial Testing Articles on Environmental XPRT

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 ...

Dec. 1, 2011

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. 26, 2014

By IWA Publishing

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. 19, 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. 19, 2017

By Reliant Water Technologies

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. 10, 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 ...

Mar. 1, 2007

By University of Tehran

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 24, 2013

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. 8, 2017

By LuminUltra Technologies Ltd.

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. 15, 2016

By IWA Publishing

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. 25, 2014

By IWA Publishing

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

Untitled Document ...

Jan. 1, 2003

By Southern California Coastal Water Research Project Authority (SCCWRP)

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. 13, 2007

By Water Environment Federation (WEF)

2014 France Automated Microbiology Tests Market: Molecular Diagnostics, Microbial Identification, Antibiotic Susceptibility, Blood Culture, Urine Scre

ReportsnReports.com adds report French Automated Microbiology Market 2014: Molecular Diagnostics, Microbial Identification, Antibiotic Susceptibility, Blood Culture, Urine Screening, Immunodiagnostics to its store. French Automated Microbiology Market 2014 is a new analysis of major business opportunities emerging in the French automated microbiology market during the next five years. The ...

Feb. 11, 2014

Innovations in Bench Testing of Waste waters

Wastewater management in developing countries throughout the world is in a state of crisis. It is estimated that 2.6 billion people worldwide live without adequate sanitation. Resources are scarce, previous management systems have failed, and traditional techniques and solutions are not immediate enough, too expensive, or simply inefficient. Discussion with regards to OI Analytics Instrumentation ...

Sep. 11, 2012

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. 18, 2014

By IWA Publishing

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. 28, 2013

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- ...

Dec. 1, 2011

By IWA Publishing

Calibration of a passive, in situ, integrative sampler for monitoring of microbial biotoxins in aquatic environments

In this work, an integrative passive sampler based on a silicone membrane filled with a suspension of γ-Fe2O3 at pH 3.5 was developed. The novel device was calibrated for the measurement of microcystin concentrations in water. Laboratory calibration studies of the passive sampling devises under controlled conditions of temperature, water turbulence, and analyte concentration were ...

Jul. 7, 2015

By IWA Publishing

Preparation of a fouling-resistant sustainable cathode for a single-chambered microbial fuel cell

Two different binder materials of varying water affinity, viz. poly vinyl alcohol (PVA) and poly-tetrafluoroethylene (PTFE), and biocide vanillin were tested for cathode fouling in a single chamber air-cathode microbial fuel cell (MFC) constructed with a low-cost baked clayware cylinder and operated under fed-batch mode. PVA and PTFE loadings of 0.5 mg/cm2 were used for MFC-1 and MFC-2, ...

Feb. 19, 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 29, 2015

By John Wiley & Sons, Ltd.

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