How does the pump operates?
New water is drawn into the eye of the impeller via the pump inlet. Vanes pass kinetic energy to the water. Water rotates and leaves the impeller. Volute casing
3 unit process of a recirculating system
Mechanical filter, biological filter, aeration/oxygenator
What is centrifugal pump?
Pump that uses centrifugal force to develop velocity in the liquid being handled.
What is mechanical filter?
It removes solid wastes such as uneaten feed, fish waste and debris from the water.
3 types of tank material.
Glass-reinforced plastic, Plastic (polyethylene), Fibreglass, Concrete, Steel
Benefits of round tank.
Water movement in circular, easy cleaning, no dead zone, fish swim in circular patterns
What is pump?
Pump is a mechanical device that add energy to fluids by transforming mechanical energy to kinetic energy of the fluid.
Name and operation.
Removal of particles when water is forced to flow through a layer of a sand of various sizes and depths.
The best color tank.
Blue Tanks (Light or Dark) - Mimics natural aquatic environments.
2 maintenance for pump.
periodic lubrication, adjustment of end clearance and examination of internal parts.
Name and operation.
Drum filter. Waste water is led into the drum and passes through the screen, leaving solids trapped against the screen.
Name 2 types of bacteria involved in nitrification process.
Nitrosomonas, Nitrobacter
Method to overcome pH drop in RAS filtration system.
Crushed oyster shell, dolomite [CaMg(CO3)2 ], coral, sodium bicarbonate (NaHCO3), sodium carbonate
3 requirement for biological filter.
large specific surface areas, difficult to clog, proper contact between the water and the surface of the medium, easy to clean
What is biological filter?
It breaks down toxic ammonia and nitrite into less harmful nitrate through beneficial bacteria.
3 locations to install filter in a farm.
Inlet, outlet, recirculating system.
3 major unit of centrifugal pump.
Power unit (electric motor), pump shaft, impeller
2 benefits of square tank.
Increase capacity, round tank waste space,