Potable Reuse. David Sheehan General Manager, Water Quality Performance and Regulation

Transcription

1 Potable Reuse David Sheehan General Manager, Water Quality Performance and Regulation

2 Caveats Potable reuse is not part of current Victorian government water policy Coliban Water has no plans to implement any potable reuse schemes, but is merely exploring potable reuse as one possible future option, amongst many future options, to support long-term water security 2

3 Coliban Water s region of operation 19 water treatment plants 49 towns supplied with drinking water Approximately 145,000 customers serviced Area of operation covers approximately 9% of Victoria 3

4 4 Bendigo s water supply system

5 Inflows (GL) Inflows into Coliban Water s southern storages Annual Inflows and Medians 51,062 ML Annual Flow Median before 1996 Median after 1996 Median ,127 ML ,507 ML 20 0 Year ( ) 5

6 Key components for potable reuse schemes Technical Regulatory Education Slide adapted from presentation by J. Mosher, US NWRI 6

7 Regulatory existing national guidance Challenge is converting national guidance documents into state-based regulation 7

8 Regulatory issues to address Creating outcome-based regulation that is still protective of public health (i.e. finding the balance between highly prescriptive regulation and regulation that allows some flexibility in achieving the desired outcome) Having a process by which various treatment processes can be deemed acceptable for use (addressed in technical section) Addressing the issue of the required minimum competencies of the individuals who are responsible for managing the treatment processes 8

9 9 Technical WaterVal validation framework

10 Technical WaterVal overview A national framework for the validation of water treatment technologies Validation is based on risk management principles and is a key component of the regulatory approval process Validation is focussed on two questions, will it work? before starting schemes, and is it working? once these are operating, by: demonstrating the capability of processes to remove or inactivate target pathogens (log reduction values) and correlating performance with operational monitoring 10

11 Technical - WaterVal validation protocols Pathogens removal only (not yet chemicals) Focused on individual treatment processes or technologies Plant approval remains the Regulator s responsibility, taking into account risk and exposure A range of technologies could require validation Activated Sludge GAC MBR UV Disinfection Anaerobic Ponds BAC MF - UF Chlorination Wetlands Manage Aquifer Recharge Dual Media Filtration DAFF Ceramic Membranes Reverse Osmosis Pasteurisation Ozone Disinfection 11

12 Technical WaterVal validation framework Comprehensive suite of documents on the technical aspects of water reuse 12

13 Technical international guidance documents Published by WateReuse in 2015 Sponsors: WateReuse, AWWA, and WEF Developed by an NWRI Expert Panel Available as free download at: Slide adapted from presentation by J. Mosher, US NWRI 13

14 Technical - example treatment trains Based on draft Expert Panel Report on the Feasibility of Developing DPR Criteria for Calif. (2016), courtesy of J Mosher, NWRI 14

15 Education issues to address Convincing customers that potable reuse can be done safely and is an option that should at least be considered Providing customers, and the media, with sufficient information that they feel informed enough to be able to make decisions on options Starting the conversation early enough to allow customers, and the media, to be able to digest the information that they have been given (best estimates are that you need a lead time of months) 15

16 Education Water360 Communication platform with information and engagement tools/products for use by water companies for community education on the water cycle 16

17 Education Water360 content Community voices Expert and operator voices Animations Treatment science videos Global Map 17

18 Education Water360 searchable video library 1,300 video interviews, animations, graphics Expert and community voices 18

19 Education Potential uses of Water360 Use existing products to help develop your own: Visitor and learning centres School programs Community displays Staff training News media Briefing business leaders, councillors, politicians Websites and education videos Link Water360 to your website 19

20 Acknowledgments Greg Oliver & Fiona Chandler, WaterSecure Cedric Robillot, Headstart Development Jeff Mosher, US National Water Research Institute 20

21 21 Questions