A grease trap is designed to capture fats, oils and grease (FOG) before they enter the drainage system. However, when grease, food particles and organic waste remain inside for too long, they can begin to decompose and produce unpleasant odours.
The good news is that grease trap smells can usually be controlled with regular cleaning, proper maintenance and good waste-management practices. For businesses that require additional odour control, a Grease Trap Bio-Enzyme and Auto Dosing Unit can also be incorporated into the maintenance programme.
1. Clean Your Grease Trap Regularly
One of the most effective ways to prevent bad odours is regular cleaning. Remove accumulated grease, oil, food particles and sludge before excessive buildup occurs.
Restaurants and commercial kitchens with heavy usage may require more frequent servicing than lower-volume premises.
2. Follow the 25% Rule
As a useful maintenance guideline, consider servicing the grease trap before accumulated grease and settled solids occupy approximately 25% of its effective liquid depth.
Waiting until the grease trap is completely full can reduce its effectiveness and increase the likelihood of odour, blockage and drainage problems.
3. Clean the Filter Basket Frequently
If your grease trap is equipped with a removable filter or perforated basket, empty and clean it regularly.
Food particles trapped inside the basket can decompose quickly and become a major source of unpleasant smells.
4. Clean the Internal Walls and Baffles
Grease doesn't only float on the surface. Residue can also stick to the internal walls, baffles and removable components.
During maintenance, clean these surfaces carefully to remove old grease and organic residue without damaging the internal structure.
5. Keep the Inlet and Outlet Clear
Check that the inlet and outlet are free from grease, food particles and other obstructions.
Restricted wastewater flow can contribute to stagnant conditions, blockages and unpleasant odours.
6. Check the Lid and Seal
A grease trap lid should close securely.
If the lid or seal is damaged, loose or incorrectly installed, odours from inside the grease trap may escape into the kitchen or surrounding area.
7. Don't Pour Food Waste Into the Drain
Prevention starts before wastewater reaches the grease trap.
Scrape leftover food from plates, trays, pots and cookware into the appropriate waste bin before washing. Reducing the amount of organic waste entering the grease trap can help reduce both grease buildup and odour.
8. Don't Simply Mask the Smell
Air fresheners and fragrances may temporarily cover an unpleasant smell, but they do not address the source of the problem.
If your grease trap smells, check for accumulated grease, decomposing food solids, stagnant wastewater, blocked pipes or poor lid sealing.
9. Check the Plumbing and Venting if Odour Continues
If the grease trap has been thoroughly cleaned and properly closed but the smell continues, the problem may be related to the surrounding drainage or venting system.
Have the installation, seals, drainage connections and venting inspected by a qualified plumber or technician where necessary.
Extra Odour Control: Grease Trap Bio-Enzyme
For businesses looking for additional odour-control support, GoodBac Grease Trap Bio-Enzyme can be incorporated into a regular grease trap maintenance programme.
The Bio-Enzyme is designed for grease trap and kitchen drain applications and can help support the breakdown of organic waste and control unpleasant odours.
It is particularly useful for restaurants, food courts, commercial kitchens and other premises where grease traps receive wastewater throughout the day.
Important: Bio-Enzyme treatment should complement good grease trap maintenance practices. It should not be treated as a replacement for regular grease and solid-waste removal or periodic grease trap cleaning.
Make It Easier with the ADU9291P Auto Dosing Unit
Instead of relying entirely on manual dosing, businesses can pair the Bio-Enzyme with the ADU9291P Auto Dosing Unit.
The Auto Dosing Unit can be set up to dispense the Bio-Enzyme at scheduled intervals, helping businesses maintain a more consistent dosing routine.
This makes the combination particularly useful for commercial premises that want a convenient grease trap maintenance and odour-control programme:
Bio-Enzyme + Auto Dosing Unit + Regular Grease Trap Cleaning
Together, these form a more complete approach to grease trap maintenance.
Clean Trap. Less Odour. Better Flow.
A properly maintained grease trap can help reduce unpleasant odours, minimise grease buildup, support smoother wastewater flow and reduce the risk of troublesome blockages.
For grease traps, Bio-Enzyme solutions, Auto Dosing Units and grease management solutions, contact GreaseGo.