Att 3 - Site Based Management · MCU17/0020

In past trials we have found that the Giant Grouper fill the entire water column allowing us to
have an average stocking density of 75 Kg/m3 with a maximum density of 100kg/m3. With past
experience on other farms we have found that Barramundi can also be grown using the same
stocking densities as the Giant Grouper.

The stocking densities of the Cobia and Flowery Cod are unknown until we do our own trial on
the stocking densities. Our experience with Gold spot cod which are similar in behaviour to the
Flowery Cod has shown us that they can’t be grown at densities as high as Giant Grouper and
Barramundi as they like to sit on the bottom of the tank which limits their stocking densities in
tanks with low diameter to depth ratios like our grow tanks.

Bribie Island research Centre lead scientists have told us they believe a maximum stocking
density of 40kg/m3 should be achievable with the Cobia which is very low but they grow twice
as fast as the other species so this means we can get 2 crops to 1 of the other species which
should make up for the low achievable stocking densities.

3 Location
Our proposed facility is located at 3 Sanders street, Noosaville Queensland. Our company
currently secured a 5x5x5 lease on both sheds on the property. The property has town water
supply, Single phase and 3 phase power supply and connection to municipal sewer.

4 Farming Methods and Aquaculture Equipment
4.1 Farming Method

At our chosen site we will be operating a Hatchery and Recirculating Aquaculture System
(RAS). The fish will be cultured in varying sized tanks. We will be turning the water over in the
tanks 1.5 times an hour during feeding and 2 times an hour when feeding is completed. The
effluent water from the grow tanks will go through a 60micron drum filter then flow into an
aboveground sump. From the sump the water will be pumped through a Protein skimmer where
ozone will be injected. The water from the protein skimmer will then enter a Moving Bed Bio
Reactor (MBBR) containing a mixture of k1 Kaldness biomedia and the new mutag bio chip at
a ratio of 1:1. The water will then flow into the sump where it will be pumped back to the grow
tanks.

A Denitrification tank will also be incorporated in the system. The Denitrification tank will draw
raw water from the return pipe from the grow tanks. The Denitrification tank contains k1
Kaldness bio media and the water is pumped into the bottom of tank and flows up through the
media and then flows out the top into a 200 ltr drum. From the drum the water is pumped up
into the MBBR where any excess Nitrogen (N2) gas can be gassed off. Waste from the Protein
skimmer will be used as the carbon donor for the de nitrification tank. This waste will be dosed
into the de nitrification tank to keep the ORP between -50-+50 mv any excess waste from the
protein skimmer will be pumped into the waste storage tank.

Discharge water will be drawn from the return pipe from the grow tanks at a rate of 3500 litres
per day. The drum filter will be washed using fresh water and will be discharged into the sewer
in the early stages. In the early stages the total volume will only be 190000ltrs so we will use
4800ltrs of system water and 5200ltrs of water to wash the drum filter screens. As the system
grows we will install 2 x 35000ltr settling tanks which will contain fresh water to wash down the
drum filter screens. One tank will supply the water to clean the drum filter screens while the
other tank is settling the solids out. When the solids are settled (after a 24hr period) the sludge