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Roasting coffee beans with coffee grounds can achieve zero carbon dioxide emissions.

Published: 2026-04-23 Author: World Gafei

Last Updated: 2026/04/23, Coffee grounds, as the most common garbage in cafes, are disposed of as waste in most cases. But as coffee has become a daily "spiritual food" for more and more people, coffee grounds have gradually increased, and the disposal of coffee grounds has become a big project. According to statistics, the world produces more than 8 million tons every year.

Coffee grounds, as the most common garbage in cafes, are disposed of as waste in most cases. But as coffee has become a daily "spiritual food" for more and more people, coffee grounds have gradually increased, and the disposal of coffee grounds has become a big project.

According to statistics, more than 8 million tons of coffee grounds are produced in the world every year, and the treatment of coffee grounds will not only release more gases that pollute the environment, but also cause a lot of energy consumption in the process of combustion. There is also a part of the coffee grounds that have not been treated in time will be discharged directly into the city with the sewers. Therefore, a huge amount of coffee grounds will not only consume a lot of energy, but also cause some harm to the environment.

Since the coffee grounds themselves are fibrous, they are highly available after recycling and drying, so they should be used to do something rather than lose them. Therefore, over the past decade, some researchers have been "laying their hands" on coffee grounds, turning coffee grounds into treasures, producing mixed fuel, mixed briquettes, environmentally friendly plates, clothing fabrics, and food utensils. Coffee grounds is no longer waste, it can play its own advantages in clothing, construction, building materials, fuel, tableware and other fields, and has become a popular environmental protection cake in many industries.

For the Japanese who have the ultimate pursuit of environmental protection, they have more advanced research and invention on the environmental protection and practical use of coffee grounds. It has been reported that a Japanese scientist believes that a large amount of carbon dioxide has been emitted from the roasting and brewing process of coffee to pollute the environment, so it is best not to burn coffee grounds without burning.

Recently, a Japanese coffee roasting company said that it is true that the carbon and fuel used in roasting coffee beans are not environmentally friendly. After that, it is not environmentally friendly to use energy to deal with coffee grounds. So we should use coffee grounds to bake coffee beans, minimize the carbon use of coffee beans when baking, and do not have to worry about the waste of energy in the post-processing of coffee grounds.

The baking company says its coffee beans are roasted with carbon because the coffee will have a better texture. Compared with the gas in the combustion process will produce a lot of moisture, while charcoal combustion will produce less moisture, so roasted coffee beans dehydrate more thoroughly and quickly, coffee taste will be softer and milder, with a unique charcoal flavor. Because charcoal is used, not only a large amount of wood is consumed, but also the gas emitted will pollute the environment.

Therefore, with the strengthening of people's awareness of environmental protection, their practice of baking coffee beans with charcoal also makes many people say that it is not environmentally friendly. So the company began a discussion and decided to recycle coffee grounds for roasting coffee beans, but not to burn them directly, because coffee grounds contain too much moisture and need to be dehydrated efficiently before they can be burned directly, as well as a waste of energy to produce exhaust gas. So in recent years, they have joined hands with the research team of Kinki University to develop the biological coke "bio-coke".

Biochar is an alternative fuel for coal char, which is made by heating organic waste and compressing it under high pressure. However, due to the high density of biological coke and weak combustion performance, the firepower is not enough to bake large quantities of coffee beans. So they also mix and compress the routinely dried coffee grounds with dried corn stalks and straw, and then add firepower to the baking process.

The head of the baking company said that because coffee plants absorb carbon dioxide during growth, the carbon dioxide released during combustion is actually carbon dioxide absorbed during plant growth, so it belongs to zero carbon dioxide emissions. At the same time, coffee grounds solid fuel does not produce waste, so biological coke and coffee brick are environmentally friendly fuels.

Well, the carbon dioxide released during combustion is the carbon dioxide absorbed by plants during growth = offset = zero carbon dioxide emissions. The trick of "using magic to defeat magic" is very useful!

Photo Source: Internet

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