Improving Root Cause Analysis of Bacteriological Water Quality Failures at Water Treatment Works

Ellis, Kate; Mounce, S. R.; Ryan, Bernadette; Biggs, Catherine A.; Templeton, Michael R.

doi:10.1016/j.proeng.2015.08.890

Cited by 3 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A reactive response to an outlet bacteriological sample failure at a storage tank will also lead to an investigation (Environment Agency 2010). In many cases, such investigations do not produce a root cause for the failure, which means that it is impossible to target remedial action and so the costs of the investigation cannot be justified (Ellis 2013). Cleaning a service reservoir typically requires the facility to be drained and taken out of service, causing a disruption to water supply and making such interventions undesirable (Brandt et al 2016).…”

Section: Discussionmentioning

confidence: 99%

The operational value of inlet monitoring at service reservoirs

Doronina

Husband

Boxall

et al. 2020

Urban Water Journal

View full text Add to dashboard Cite

Drinking water quality leaving water treatment works is known to deteriorate as it makes its way through distribution networks. As deterioration rates are related to the condition of the network and how it is operated, it is important to determine the location and magnitude so that causes can be determined and effective maintenance implemented. Water quality is typically monitored at outlets of service reservoirs to help track changing water quality. However, these results do not confirm whether the issue is linked to the network between treatment and the service reservoir, the service reservoir itself, or both. The work in this paper investigates the value of using inlet monitoring at service reservoirs to overcome this limitation. Results show that monitoring at both the inlet and outlet of service reservoirs provides valuable information on asset performance and highlights the location and extent of deterioration helping inform cost-efficient resource provision.

show abstract

Section: Discussionmentioning

confidence: 99%

The operational value of inlet monitoring at service reservoirs

Doronina

Husband

Boxall

et al. 2020

Urban Water Journal

View full text Add to dashboard Cite

show abstract

“…For this reason, the WDS can often be a cause of concern due to the degradation and a potential source of contamination of water. There are many studies reported regarding the water quality failures . For example, Imran et al discussed the problems of red water release .…”

Section: Introductionmentioning

confidence: 99%

Impacts of Water Quality on the Spatiotemporal Susceptibility of Water Distribution Systems

Mortula

Ali

Sadiq

et al. 2019

CLEAN Soil Air Water

View full text Add to dashboard Cite

Maintaining water quality in distribution systems is crucial for ensuring safety of water supply. The distribution infrastructure is typically buried underground and it is often difficult to assess the condition of the system. In case of breakage of underground pipe network, external agents, like microorganisms may ingress into the distribution system which then react with residual disinfectant (chlorine) and result in faster decay. Understanding the chlorine decay is critical to ensuring the acceptable condition of the water distribution infrastructure. The objective of this study is to assess the spatiotemporal susceptibility of a water distribution network based on water quality variations. GIS based residual chlorine decay, temperature, and Langelier saturation index (LSI) profiles for the entire water distribution network are created using inverse distance weighting technique. Hotspot analysis is conducted to identify the vulnerable sections of the city's water distribution network based on residual chlorine. Spatial variations can not identify a consistent pattern of decay throughout the distribution system. However, some sections of the old part (North western) of the city show low residual chlorine levels compared to other locations. LSI values are negative in some source waters, leading to potential degradation of the distribution pipes. Temporal variations indicate that residual chlorine levels drop late summer and early fall. However, hotspot analysis identifies that some of the old part of Sharjah has consistently low residual chlorine levels, indicating considerable degradation of the distribution pipes.

show abstract