Question

Give three examples of biofilters used in a Recirculating Aquaculture System (RAS).

a) Sand, glass wool, activated carbon
b) Fish, algae, bacteria
c) Plants, snails, gravel
d) Sponge filters, trickling filters, rotating biological contactors

Answer 1

Three examples of biofilters used in a Recirculating Aquaculture System (RAS) are d) sponge filters, trickling filters, and rotating biological contactors. Hence, d) is correct.

Step-by-step explanation:

Three examples of biofilters used in a Recirculating Aquaculture System (RAS) are:

1. Sponge filters: These filters use a sponge-like material to provide a large surface area for beneficial bacteria to grow and remove waste from the water.
2. Trickling filters: These filters use a bed of material, such as plastic or rocks, allowing the water to flow over it while bacteria break down the waste.
3. Rotating biological contactors: These filters consist of rotating discs covered in bacteria that treat the water as it flows over them.