A recent article in the Sydney Morning Herald reported that the City of Sydney plans to utilise an aquifer to the south of the city for storage in the operation of a city-wide non-potable water network. The network will be integrated with a decentralised trigeneration network.
The most interesting thing about this is that the corporatised water utility Sydney Water provides water and wastewater services to Sydney City, and the City of Sydney local government entity has no experience with operating water and wastewater systems. In fact the terms of the original design tender specified that the system should be able to constructed under a PPP arrangement, where presumably a private entity will operate the system.
This will be complicated from a governance perspective, let alone an engineering one, and I will be watching progress with interest. The introduction of the aquifer storage solution introduces a lot of additional complexity from an environmental perspective.
Certainly if it gets off the ground, this will be a project of sufficient size to be well and truly on the global water radar, and the global water majors will be interested. I wonder who will have the capability and the appetite to take on the risk profile of a large unconventional system like this one?