How to Dispose of Grease Trap Waste


Food preparation and washing utensils yields grease which is usually intercepted in the grease trap. How to Dispose of Grease Trap WastePlaced in the kitchen drain system, the grease trap/interceptor traps oils, fats and grease so that they won’t end up in the sewer.

Once in a while, the trapped grease should be removed and disposed according to the regulations set by different states. In this guide, I’ll show you how to dispose of grease trap waste.

Related: Best Grease Trap Cleaner

Why is Grease Bad for the Drainage?

F.O.G is more accurate description of grease. The initials F.O.G refer to fats, oil and grease which results from food preparation and washing dishes. The problem with grease is that it builds up in the drain pipes, septic tank, manholes.

This can result in slow-moving drains, blockages or septic build-up. Grease build-up will also lead to bad smell lingering around.

While grease from households can be easily managed, large establishments like restaurants will have to hire grease removal services.

With grease posing a big problem in the sewerage system, states have come up with regulations for governing its management. So, you may end up being penalized if you don’t comply with the regulations from your state.

How to Dispose of Grease Trap Waste

Disposing the contents of a grease trap/interceptor depends on whether it’s domestic or large scale food preparation as in the case of restaurants.

Domestic food preparation yields insignificant grease which can be scooped and tossed in the trash. However, there’re rules governing the disposal of grease trap contents from food processing plants and restaurants.

Here’re a tips for disposing grease trap waste at home and in the restaurant.

Disposing Grease Trap Waste at Home

At home, the grease trap will be located under the sink or outdoors just near the kitchen. Since under sink grease traps have a small capacity to hold grease, they require regular checking and clean-up.

Outdoor grease traps are large underground plumbing fixtures usually located a few feet from the kitchen. They are capable of trapping large volumes for grease.

Disposing Grease Trap Waste from Restaurants

Food preparation in restaurants and other facilities yields tons of grease waste which poses a great problem to the drainage system. That’s why such establishments are equipped with large grease interceptors for trapping waste fats, oils and grease.

By making use of cooking oil, restaurants and food processing establishments will recover both “yellow grease” and “brown grease.’’

To minimize the amount grease waste that ends in the grease trap, it’s advisable to store as much of the yellow grease as possible. Since it does not contain a lot of water, yellow grease can be used as a biodiesel. Yellow grease also makes an ingredient in the manufacture of soap, detergents, animal food and so on.

Brown grease is the grease that ends up in the grease trap/interceptor during food preparation and processing.

Over time, brown grease will accumulate in the grease trap to levels that causes slow drains or septic back-up. That’s where grease trap pumping comes in place. It’s recommended that the grease trap be pumped out regularly to avoid septic build-up or slow-moving drain.

You can contact your nearest plumbing services company that deals with grease trap cleaning and maintenance.

The service involves pumping out the layer of grease into a track so that it can be transported to a treatment plant. Plus they’ll clean out the grease trap using pressurized water jet to push food debris further into the drain.

Uses of Used Cooking Oil

Recycling used cooking comes with additional benefits other than preventing drainage backup and easing pressure in the already congested landfills. Whether you’re a homeowner or restaurant owner, you can save some money by putting used cooking oil into good use.

The method of recycling depends on whether you are dealing with yellow grease or brown grease.

Here are some of the ways used cooking oil can be recycled.

1. Compositing

Brown grease from the grease trap can stored in pits so that water can evaporate. When mixed with sawdust and allowed to compost, the solidified grease makes a nutritious fertilizer for your crops.

2. Biodiesel Fuel

Food processors and restaurants are cutting down their power and heating costs by utilizing yellow grease. Recent technologies have made it possible to remove water from brown grease thus allowing it to be used as a biofuel.

Biofuel has the advantage of being environmentally friendly as compared to fossil fuels.

3. Animal Feed

Waste cooking adds flavour when added to livestock feeds or pet food.

4. Other Uses

Used cooking oil can be used to make soap, detergents, clothes and rubber. To make soap, you’ll only require the used cooking oil, caustic soda flakes (NaOH), water and molding containers.

Tips for Minimizing Grease in the Grease Trap

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