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Evaluation of Real-Time Water Quality Sensors for the Detection of Intentional Bacterial Spore Contamination of Potable Water | OMICS International | Abstract
ISSN: 2155-6210

Journal of Biosensors & Bioelectronics
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Research Article

Evaluation of Real-Time Water Quality Sensors for the Detection of Intentional Bacterial Spore Contamination of Potable Water

Samendra P Sherchan1,2*, Charles P Gerba1 and Ian L Pepper2

1Department of Soil, Water, and Environmental Science, University of Arizona, Tucson, Arizona, USA

2Environmental Research Laboratory, University of Arizona, Tucson, Arizona, USA

*Corresponding Author:
Sherchan
Environmental Research Lab
University of Arizona, Tucson, Arizona, USA
Tel: 1-319-400-9564
Fax: 1-520-573-0852
E-mail: [email protected]

Received Date: July 19, 2013; Accepted Date: September 11, 2013; Published Date: September 19, 2013

Citation: Sherchan SP, Gerba CP, Pepper IL (2013) Evaluation of Real-Time Water Quality Sensors for the Detection of Intentional Bacterial Spore Contamination of Potable Water. J Biosens Bioelectron 4:141. doi: 10.4172/2155-6210.1000141

Copyright: © 2013 Sherchan SP, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Water utility treatment failure, as well as intentional or accidental water intrusions can introduce biological and/ or chemical contaminants into public drinking water distribution systems. However, recently developed real-time water quality sensors can be implemented to detect such contamination events. The overall objective of this study was to evaluate the potential for real-time monitoring of bacterial spore contamination of potable water using several different water quality sensors including: the HACH Monitoring Platform; the JMAR BioSentry unit; and the S::CAN spectro::lyser technology. For this, Bacillus thuringiensis spores were used as a surrogate for Bacillus anthracis. The minimum threshold response of sensors to the microbial contaminant was determined by injecting B. thuringiensis spores into Deionized (DI), filtered or unfiltered tap water. Out of these three evaluated sensors, the BioSentry sensor was capable of detecting introduced spores and responded to B. thuringiensis spores over a concentration range of 102-105 spores/ml. In contrast, The HACH and S::CAN units were not capable of direct detection of spores. However, these two sensors can detect changes in water quality parameters such as turbidity, pH, temperature, total organic carbon and conductivity, due to media that may be associated with spores. Thus, these sensors can be integrated into a contaminant warning system for monitoring intrusion events in water distribution systems.

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