Arrow Bowen GAs Project - Arrow Energy

Arrow Bowen Gas Project EIS | Executive summary
Water treatment and storage infrastructure at the IPFs are
expected to include:
• 600 ML feedwater dam(s);
• 600 ML treated water dam(s);
• Reverse osmosis plant; and
• Two 960 ML brine storage dams.
Reverse osmosis technology is currently being considered as
the most appropriate treatment process coupled with some
form of suitable pre-treatment such as membrane or media
filtration and hardness removal. With reverse osmosis, water
passes under pressure through a selective membrane and the
dissolved salts are retained as concentrated brine. Treated
water may also be amended through the addition of trace
elements so that it is suitable for a variety of beneficial end uses.
4.4.2 Management of CSG Water
Arrow has developed a strategy for the management of CSG
water in line with the Queensland EHP’s Coal Seam Gas Water
Management Policy (DERM, 2010). This policy is implemented
through the EA conditions imposed upon Arrow’s operations
and projects.
Arrow’s water management strategy seeks to maximise
beneficial use of CSG water and minimise the environmental
impacts associated with its use and disposal. The strategy also
seeks (where possible) to manage CSG water in such a way as
to mitigate the impacts of groundwater depressurisation on
groundwater users. In order to achieve these objectives, the
CSG water produced as a result of undertaking CSG extraction
activities will be managed through a hierarchy of management
options.
Arrow expects to implement a number of beneficial use
options including the agricultural (irrigation), industrial and
urban uses in addition to the current uses already employed at
its existing operations.
Another option is to inject water to offset the impacts of
groundwater depressurisation on users and to provide a
disposal means for any water that cannot be accommodated
through beneficial use. Arrow will conduct an injection
feasibility study and is preparing EA applications to conduct
aquifer injection trials in the Project area. The purpose of
the trials is to determine the suitability of the formations for
injection, and to identify the volumes and rates of water that
can be sustainably injected.
Figure 10 shows the Project water management concept and
a range of end uses for CSG water.
Figure 9. Conceptual Integrated Processing Facility Arrangement
Camp Site
Water
Treatment
Facility (Reverse
Osmosis Plant)
Power
Generation
Facility
Control
Room
Temporary
Laydown
Area
Temporary
Laydown
Area
Feedwater Dam
Coal Seam Gas
Water Gathering
Line or Transfer
Line from CGPF
or FCF
Fence
To the
Sales Gas Pipeline
Treated
Water Dam
Brine
Dam
Brine
Dam
High Pressure
Gas Pipeline
Gas Processing
Facility
Flare
Radiation
Zone
Flare
Medium Pressure Gas Pipeline
Low Pressure Gas Gathering Lines
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