I need your suggestions.
I am developping a AP system in Egypt and I need to build it cheap and not permanent (pilot project inside an hotel, so no concrete or other permanent structures yet..).
Setting is very similar to UVI
Fish is tilapia at density of 14 to 50 kg m3 (best FRC and economic result will determine the best ratio.
vegetable production estimated at 25kg m2
My idea was creating a small 10m3 raceway (11x1.5X1) type of tank build using sandbags as containment wall and a LDPE liner. Last two meter of the raceway will be used as sedimentation tank by using a baffle structure.
No Hole in the FT but 2 immersion pump (one stand by and 45 min FT exchange rate)
One IBC air stripping-nitrification tank (either with floating media and forced aeration or gravel trickling filter ) in higer position fed by FT pump.
Two raft tank 70m2 each (0.40m depth) fed from IBC by gravity and then heading back to the FT by gravity as well.
One IBC to top up the system
Aeration provided by air diffuser along FT and a PVC food grade pipes along the raft GB (as done in Canada by Savidov)
Why I chosen this setting :
-FT need to be heavily shadowed most of the year to keep temperature stable but might need a small greenhouse to cover the system in january february. Raceway setting will allow to play with fish density and determine best economic growing condition.
-GB height of 0.4m was thought to increase temperature stability
-IBC tricking filter might allow to reduce extreme temperature in summer thanks to evaporation (estimated in -7°C from ambient temp)
Any suggestion or comment will help out