Chicago Airport Composting Project

Airport Composting Projects Turn Food Waste Into Climate Solutions

Airports handle millions of passengers every year. Along with travelers comes a massive amount of waste—from coffee cups and food scraps to paper towels and packaging. However, a growing number of airports are tackling this challenge through composting programs. These programs transform organic waste into nutrient-rich soil instead of sending it to landfills.

Today, sustainability leaders in aviation are recognizing that composting is one of the fastest ways to reduce airport environmental impacts.

Why Composting at Airports Matters

Food courts, restaurants, and airline catering operations produce huge volumes of organic waste daily. Instead of discarding these materials, composting systems allow airports to recover food scraps, coffee grounds, napkins, and biodegradable packaging. The systems then convert them into useful compost for agriculture and landscaping.

According to research discussed by the International Aviation Waste Management Association, airports can dramatically cut landfill waste by introducing composting alongside recycling programs. Improved waste sorting systems also play an important role. 

Composting also helps reduce methane emissions. Organic waste in landfills decomposes without oxygen, producing methane—a greenhouse gas far more potent than carbon dioxide. By diverting food scraps into composting systems instead, airports reduce climate pollution while creating valuable soil products.

A Growing Trend in Airport Sustainability

Major airports across the United States are already implementing composting programs.

The compost materials, including food scraps, meat, bones, paper waste, bathroom towels and plant waste, will first be fed into a 1,600-square-foot pre-composter. Additionally, there must be a system installed to control the odor, the airport’s bid documents say.

For example, Denver International Airport launched a waste diversion pilot program that collects compostable material from airport restaurants and concessionaires. Within just six months, the program diverted more than 69 tons of material from landfills. It achieved an average diversion rate of 71 percent—more than triple the airport’s previous rate. 

Other airports—including Seattle, San Diego, and San Francisco—have also implemented food-waste collection systems that send organic material to compost facilities or anaerobic digesters. These programs capture waste from kitchens, food courts, and passenger areas. Then, they transform it into compost used by farms, vineyards, and landscaping projects. 

Turning Waste Into a Resource

The concept behind airport composting is simple: organic waste becomes a resource rather than a liability.

Food scraps and biodegradable materials are collected separately from trash and transported to composting facilities where microbes break down the organic matter. Consequently, the result is a nutrient-rich soil amendment used to improve soil health, support agriculture, and reduce the need for synthetic fertilizers.

Many airports are discovering another benefit—cost savings. Large airports generate tens of thousands of tons of waste annually, and landfill disposal can be expensive. Composting programs reduce tipping fees while supporting broader sustainability goals. 

Building the Green Airports of the Future

Over the next five years, the recycling center as a whole is expected to save the airport about $1 million in waste disposal costs. This will allow the center to pay for itself, officials said.

The new composting system will be built to handle up to two tons of waste daily. This is enough to keep up with eventual airport expansion, officials said. The airport plans to spread the worms’ waste as fertilizer on its 6,000 acres. Additionally, it will package and sell the excess.

Airport composting projects represent a small but important step toward greener aviation. While aircraft emissions often dominate discussions about aviation sustainability, airport operations themselves—from waste management to energy use—play a significant role in environmental impact.

By expanding composting, recycling, and waste-reduction initiatives, airports can move closer to the goal of becoming zero-waste transportation hubs.

Costs and Returns

The airport’s initial plan is to order 300 pounds of worms for $6,000. The worms’ home is expected to take up some 8,000 square feet, or around the size of an average Family Dollar store.

Money to build and operate the recycling center will come from the airport’s operating budget, mostly made up of fees paid by passengers and airlines. The center will also sort aluminum, plastics and paper and sell them to recyclers. The project will be overseen by a company called Go Green, which will hire about 10 employees to run it.

photo by Earth911.com
photo by Earth911.com

For travelers, it may start with something as simple as placing a coffee cup or banana peel into the right bin. For the aviation industry, however, those small actions are part of a much larger transformation—one that turns airport waste into an opportunity for climate progress.

“Worms are herbivores. … They don’t like a North American diet,” he said.
Airport officials said they’re confident the pre-composting process will break down the material enough for the worms to process food scraps.

Sources


FROM: DAN CORBIN at WISCONSIN WORM FARM

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