Grease Traps

Grease Traps should always be installed prior to a sewage treatment plant in all commercial wastewater systems to remove fats and grease from the wastewater. WTE Ltd. supplies all types of grease separators throughout the UK.

The 'Grease Hippo' range of Grease Traps

These feature 2 Grease Traps which come with an option of the Standard GH range for grease interceptors or FGH Filtered models as shown below. Catering from a nominal capacity of 170 litres in the model 1 units to 450 litres in the model 2 units. They will store or trap 100 litres and 350 litres of grease respectively.

As well as the Grease Traps, we offer 4 larger sizes of Grease Separators the GS range of grease interceptors. Capacities  from 1000 litres to 6000 litres . The GS4 Grease Separator which has a Nominal Size of 60 which can store 4500 litres of process waste from an abattoir or meat processing plant.

Calculating your Grease Requirement - Please contact us if you are unsure 

The new European design standard for Grease Traps and Separators EN1825 stipulates that to calculate the correct size or NS (Nominal Size) then 4 major factors are required:

  • Maximum flow rate of water.
  • Maximum temperature of water
  • Density of grease/oils to be separated or trapped
  • Influence of cleaning and rinsing agents used

    If we assume that parts 2 3 and 4 all have a denomination of 1.5 when multiplied together, then a simple calculation can be used to ascertain the size required, which is Maximm Flow Rate x 1.5. From this the correct grease separator can be specified.

    Eg. An installation with a max flow rate at 1.5 litres per second from two large kitchen areas would give a calculation of 1.5 x 1.5 which would require a grease trap of nominal size of 2.25.

    It is recommended that a product just above the calculated nominal size is used ie A Nominal Size above 2.5 . The standard then specifically requires that the unit then must have a minimum volume for sludge of 100 times the nominal size for all installations. Other than abattoirs and similar processing plants which require it to be 200 times.

    So for the above calculation then the grease  trap or separator size would have to be in excess of 250 litres, which would be our GH2 grease trap which has a storage capacity of 450 litres.
Grease Traps

Grease Traps 2


Larger Grease Traps

We provide 4 standard sizes of grease separators / grease traps from our Gs1 which has a Nominal Size of 10 and can store 900litres of grease up to our GS4 which has a Nominal Size of 60 and can store 4500 litres of waste from an abbatoir or meat processing plant. Grease SeparatorAll data sheets have specific details on volumes and nominal sizes.

Grease traps should be used to support the drainage system helping prevent grease & liquefied fats solidifying & blocking the drainage pipes. They are particularly important in small kitchens, processing plants where more than 30 meals per day are served regularly and grease / bi products are discharged into the foul drainage system.