The oil in orange peel is made of 95-percent limonene, a substance that, according to Greenlivingtips.com, is used in industrial plastics manufacturing, as well as being added to many household cleaners to give them a citrusy odor. The website notes that Florida's orange juice industry produces 5 million tons of peel waste every year, which is usually fed to cattle. There are many other uses for orange peel as well, so before you throw it away, consider some ways to incorporate it around your house and yard.
Keep mosquitoes and flies at bay. These insects don't like limonene, according to Gomestic.com, so grate some orange peel (or use a zester) and place piles of the grated peel, or zest, around the patio or anywhere where flying insects may be a problem.
Get rid of ants. Ants, too, dislike limonene. To get rid of an ant infestation, place a few orange peels in a blender, add a cup of water and blend until smooth. Pour this solution directly on ant hills, or dab it across entryways to discourage ants from entering your house.
Deodorize your house. Place dried orange peel in sachets or cloth bags, and put these wherever you notice a musty smell, such as in cupboards and closest. Greenlivingtips.com also suggests to drop some orange peel into garbage disposal units and grind it up to get rid of foul odors.
Use orange peel as kindling. The oil in orange peel is flammable, according to Gomestic.com, so you can use it as kindling to start fires in your fireplace.
Flavor foods with orange zest. Grate some zest from orange peel and add it to soups, sauces and salads, suggests Greenlivingtips.com.