How Countries Turn Coffee Waste Into Functional Drinks

Coffee drinkers rarely think about the heaps of pulp, wastewater, and spent grounds left behind after beans are processed—but around the world, innovators are turning these leftovers into surprising new drinks with real benefits. From Belgium’s digestible coffee fruit soda to Japan’s pressurized espresso spray, these creations go far beyond compost. What can coffee waste really become? And how are different countries making it useful?

In seven countries, researchers and companies have turned coffee pulp, wastewater, spent grounds, and more into at least eight functional products: a milky coffee fruit drink, canned espresso spray, distilled alcohol, vinegar, pectin, caffeine extract, plant-based protein, and edible oil. Each addresses food waste while delivering unique health or culinary value.

Belgium’s Milky Coffee Fruit Soda

Belgium has developed a novel ingredient from a new variety of white coffee fruit flesh. Though its composition matches regular coffee, the material is milky-white, easier to digest, and offers multiple health benefits. This waste-derived material isn’t just a research novelty—it’s now used to make a coffee-flavored soda that’s gentle on digestion and ideal for athletes. The soda expands the use of discarded coffee pulp into mainstream functional beverages.

Japan’s Pressurized Coffee Spray Drink

Japan’s New Century Food Company recently launched a hit product: a “coffee spray drink” sold in aerosol cans. The concentrated espresso liquid is packaged in aluminum cans with a nozzle that releases a fine coffee mist when pressed. Users can inhale the spray directly or dilute it with water or hot water. The production process prevents oxidation via carbon dioxide sealing and ultra-high-pressure techniques, ensuring freshness comparable to premium brewed coffee. This innovation brings convenience and minimal waste to coffee consumption.

Coffee Waste as Alcohol and Vinegar

In the Democratic Republic of the Congo (formerly Zaire), researchers found that roughly 15 kilograms of coffee fruit pulp can yield 1 kilogram of 90% alcohol. The resulting “Robusta coffee wine” is clear, aromatic, and has gained popularity in Europe and the U.S. Meanwhile, Japanese flavoring companies use concentrated, fermented wastewater from wet-processed coffee to produce coffee vinegar with 4.6% acetic acid content. This high-value vinegar is both nutritious and flavorful, finding strong demand in international markets.

Pectin and Protein from Coffee Slurry

Indian scientists discovered that the sticky mucilage released during wet coffee processing can yield 50–120 grams of high-quality pectin per kilogram of fresh coffee berries. Pectin is a valuable ingredient in food, cosmetics, and pharmaceuticals. Separately, U.S. companies are scaling up production of protein extracted from discarded coffee pulp. Advanced techniques such as cooling molds and extrusion create meat-like protein products, while enzyme-modified 7S proteins mimic egg whites—offering the food industry versatile new plant-based ingredients.

Caffeine and Coffee Oil Extracts

German scientists have engineered efficient methods to extract caffeine from coffee waste and by-products. This caffeine serves diverse applications in human cancer prevention, veterinary medicine, family planning, and as a stimulant in beverages and pharmaceuticals. Additionally, Brazilian researchers successfully extracted high-grade edible oil from spent coffee powder and are preparing for full-scale production. These innovations unlock further value from materials often discarded after roasting and brewing.

Frequently Asked Questions

What is the milky coffee fruit material developed in Belgium made from?

The milky coffee fruit material comes from a new variety of white coffee fruit flesh. Its chemical composition matches normal coffee, but it is lighter in color, easier to digest, and offers multiple health functions. It’s used to produce a coffee soda suitable for athletes and people with sensitive digestion.

How does Japan’s coffee spray drink work?

Japan’s coffee spray drink is a concentrated espresso liquid packed in an aerosol can. Pressing the nozzle releases a coffee mist that can be consumed directly or diluted. The sealed cans use CO₂ and high-pressure processing to prevent oxidation, maintaining freshness like freshly brewed premium coffee.

How much alcohol can be made from coffee pulp?

Research from the Democratic Republic of the Congo shows that approximately 15 kilograms of coffee fruit pulp can produce 1 kilogram of 90% alcohol. This alcohol is used to make a clear, aromatic Robusta coffee wine that has become popular in Europe and the United States.

What can be made from wet coffee processing waste?

Wet coffee processing waste—including wastewater and mucilage—can be turned into several products. Wastewater yields 4.6% coffee vinegar after fermentation, while mucilage provides 50–120 grams of pectin per kilogram of fresh berries. These are used in food, cosmetics, and medicine.

What products are U.S. companies making from coffee waste?

U.S. companies are producing functional coffee protein from discarded pulp. Using techniques like cooling mold pressing and enzyme modification, they create meat-like protein and egg-white-like products from the coffee’s 7S protein fraction for use in food manufacturing.

What is Brazil extracting from spent coffee powder?

Brazilian researchers have successfully extracted edible oil from spent coffee powder. The process is efficient enough to support large-scale production, adding another valuable product to coffee by-product utilization.

Recommended FrontStreet Beans for Functional Coffee Experiments

Try FrontStreet Coffee’s Ethiopia Yirgacheffe for bright, tea-like acidity—a great base to explore coffee’s natural versatility. For deeper profiles, their PWN Golden Mandheling offers full-body and low acidity, ideal for taste-testing functional extractions. Both beans highlight the complexity that coffee by-products seek to preserve or enhance. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.