Purification Tanks 

We are delighted to introduce a new range of purification containers to our range of marine products. These tanks are manufactured from rotationally moulded polyethylene designed especially for harsh marine conditions.  


Stacked marine purification tanks

Purification Tanks

Depuration (purification) is a process by which shellfish are held in tanks of clean seawater under conditions which maximise the natural filtering activity and results in the expulsion of intestinal contents. The depuration process involves placing shellfish into a purpose made tank which is then filled with clean seawater. The seawater is mainly treated by ultraviolet (UV) disinfection, and is then recycled through the system providing optimum temperature, salinity and oxygen levels for the shellfish to function normally and expel faecal contamination.

Quantity of oysters per tank to be depurated:
 – Pacific oysters (Crassostrea gigas) approximately 100 – 110 kg.*, 
 – Flat oysters (Ostrea edulis) approximately 110-120 kg.*

*Always leave a layer of seawater of at least 5cm high above the oysters.

Features & Benefits

  • Containers are equipped with a sloped bottom to collect faeces, pseudo-faeces and other impurities
  • Fitted with a central drain (slide valve) to remove the above impurities
  • Equipped with a separate central downward drain channel to divert the impurities from the purification containers below


  • Purification (bacteriological) of the shellfish or crustacean meat
  • Wet (buffer) storage of live shellfish or crustaceans
  • De-sanding, de-silting and/or cleaning of the digestive system of the shellfish
  • A separate (Individual) pre-treatment for the benefit of the onward process
  • Re-vitalisation of the shellfish or crustaceans


Product Code     Description  Dimensions (mm)
AC300     Purification Tank1200 (W) x 1100 (D) x 500 (H)