Real time monitoring for pathogens in water

Syreeta L. Miles, Ian L. Pepper, Ryan G. Sinclair, Mark R. Riley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Recent concerns over the potential for bioterrorism and infrastructure resiliency have stimulated the development of sensors for real-time monitoring of biological contaminants in water distribution systems. Private and government water utilities are responding to these concerns and putting in place commercially available sensors. These sensors need to be evaluated independently (without bias) for optimization of their use, evaluation of their claimed capabilities, and their potential for integration into a supervisory control and data acquisition (SCADA) system. This research effort evaluated real-time sensors for their ability to monitor microbial contaminants in water distribution systems through rigorous evaluation protocols in afield scale test-bed laboratory specifically constructed for this purpose. Water quality sensors including the HACH Guardian Blue Monitoring Platform; the JMAR BioSentry unit; the S::CAN spectro::lyser technology; and the GE 5310 total organic carbon unit were evaluated using intrusion of Escherichia coli (E. coli) to determine the sensor's response to a microbial contaminant. Detection capabilities were examined with the contaminating E. coli bacteria suspended in deionized water or tap water with concentrations ranging from 10 3 to 10 6 cfu/mL. Most sensors were responsive to an increase in E. coli concentrations with an observed useful dynamic range between 10 3 cfu/mL to 10 6 cfu/mL. Below this range, sensors provided signals not distinguishable from noise while exceeding the threshold caused saturation and mis-classification by some sensors. The data effectively shows that select sensors can detect microbial water quality changes and thus be utilized in part of an early warning system for monitoring intrusion events in water distribution systems.

Original languageEnglish (US)
Title of host publicationWater Distribution Systems Analysis 2010 - Proceedings of the 12th International Conference, WDSA 2010
Pages303-308
Number of pages6
DOIs
StatePublished - Jan 30 2012
Event12th Annual International Conference on Water Distribution Systems Analysis 2010, WDSA 2010 - Tucson, AZ, United States
Duration: Sep 12 2010Sep 15 2010

Publication series

NameWater Distribution Systems Analysis 2010 - Proceedings of the 12th International Conference, WDSA 2010

Other

Other12th Annual International Conference on Water Distribution Systems Analysis 2010, WDSA 2010
CountryUnited States
CityTucson, AZ
Period9/12/109/15/10

Keywords

  • drinking water
  • online monitoring
  • pathogens

ASJC Scopus subject areas

  • Water Science and Technology

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  • Cite this

    Miles, S. L., Pepper, I. L., Sinclair, R. G., & Riley, M. R. (2012). Real time monitoring for pathogens in water. In Water Distribution Systems Analysis 2010 - Proceedings of the 12th International Conference, WDSA 2010 (pp. 303-308). (Water Distribution Systems Analysis 2010 - Proceedings of the 12th International Conference, WDSA 2010). https://doi.org/10.1061/41203(425)28