1. Resilience of Advanced Water Treatment Plants for Potable Reuse
- Author
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Leslie, GL, Tng, KH, Currie, J, Roberts, C, Koh, SH, Leslie, GL, Tng, KH, Currie, J, Roberts, C, and Koh, SH
- Abstract
Equipment and instruments used in Advanced Water Treatment plants are expected to fail over multiple years of operation. This study used numerical modelling techniques, informed by data taken from seven AWT plants with a cumulative operating history of 64 years, to simulate failure events that potentially impact water production and/or water quality over a 10-year period. The resilience model indicated that for AWT plants, events that lead to failures in production capacity are eight times more likely than failures that potentially could impact product quality. Moreover, the probability of equipment or instrument failure that could impact water quality can be reduced to less than one event per year through more efficient maintenance strategies. In practice, under the Australian Guidelines for Recycled Water, operators of potable reuse schemes are required to implement plans and procedures that usemultiple continuous on-line monitoring points that interrupt water production in the event that water quality drifts outside tolerable limits at critical control points in the process. Consequently, although the probability of a failure event is low (less than once per year), systems and procedures are in place to prevent the failure event leading to the production and distribution of water that does not meet quality requirements beyond the boundaries of the AWT plant.
- Published
- 2015