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Water 2018, 10(5), 590; https://doi.org/10.3390/w10050590

Assessment of the Water Treatment Process’s Empirical Model Predictions for the Management of Aesthetic and Health Risks Associated with Cyanobacteria

1
UNSW Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales (UNSW Sydney), Sydney, NSW H3T 1J4, Australia
2
Civil, Mineral and Mining Engineering Department, École Polytechnique de Montreal, Montreal, QC H3C 3A7, Canada
3
The bioMASS Lab, School of Chemical Engineering, The University of New South Wales (UNSW Sydney), Sydney, NSW H3T 1J4, Australia
4
South Australian Water Corporation (SA Water), Adelaide, SA 5001, Australia
*
Author to whom correspondence should be addressed.
Received: 16 March 2018 / Revised: 16 April 2018 / Accepted: 17 April 2018 / Published: 2 May 2018
(This article belongs to the Special Issue Eutrophication of Waterways: An Old Problem with Modern Consequences)
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Abstract

Potentially toxic cyanobacteria have been increasingly detected worldwide in water supply systems in recent years. The management of cyanobacteria in source water and through drinking water treatment processes has been a focus of global research for over thirty years. However, despite the volume of research outcomes and the publication of guidance documents, gaps still exist in the knowledge base that inhibits the confident application of individual treatment strategies for the mitigation of aesthetic and health risks associated with cyanobacteria and their metabolites at the full-scale. The main objective of this project is to deliver a suite of tools and other resources to the water industry to support the implementation of a regulatory framework for the management of water quality for the assessment and management of aesthetic and toxicity risks associated with cyanobacteria. This study includes (1) the development of a guide (based on real-world examples) for treatment plant operators to perform plant audits and investigative sampling to assess the risk associated with cyanobacteria in their plants, and validate the performance of existing unit processes, and (2) the validation of a treatment model that can be applied at any plant and used to as a guide to the removals of cyanobacteria and metabolites and the expected quality of treated water under a range of challenges from cyanobacteria. Full-scale sampling was undertaken at three Australian regions in 14 water treatment plants to validate the model. The results presented in this paper represent a comprehensive database of full-scale removal efficiencies of 2-methylisoborneol (MIB) and geosmin for a range of water quality and treatment processes. The major findings and conclusions from this project include: (1) the investigative sampling procedures developed are effective and have been successfully applied by utilities; and (2) while routine monitoring data is important, investigative sampling within the water treatment plant provides more detailed and insightful information about the effectiveness of unit processes within the plant. This paper also identifies the knowledge gaps and needs for further studies. View Full-Text
Keywords: cyanobacteria; health risk; water treatment; empirical model; process management cyanobacteria; health risk; water treatment; empirical model; process management
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zamyadi, A.; Henderson, R.K.; Newton, K.; Capelo-Neto, J.; Newcombe, G. Assessment of the Water Treatment Process’s Empirical Model Predictions for the Management of Aesthetic and Health Risks Associated with Cyanobacteria. Water 2018, 10, 590.

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