The pyrolysis carbonization process is the core step in producing biochar from coffee grounds. It works by heating coffee grounds at high temperatures in an oxygen-deficient environment, breaking down organic matter such as cellulose and hemicellulose, while retaining the carbon, forming a porous biochar.
A continuous feed system feeds dried coffee grounds into the pyrolysis furnace via a conveyor belt. The feed rate is adjusted based on the furnace volume to ensure even distribution of the raw materials.
Our pyrolysis carbonization furnace utilizes a rotary kiln design. It precisely controls temperature, oxygen concentration, and heating time to ensure consistent biochar quality.
By replacing the air within the pyrolysis furnace, the oxygen concentration is controlled below 5%, preventing the coffee grounds from burning.
The carbonization equipment utilizes a three-stage heating curve: drying (moisture removal), pyrolysis (organic matter breakdown), and carbonization (carbon structure stabilization). The biomass pyrolysis plant uses thermocouples to monitor the furnace temperature in real time, maintaining an accuracy of ±10°C.
The syngas generated during the pyrolysis process is collected and used as fuel to heat the pyrolysis furnace, completing the energy cycle.
Mingjie Group provides biomass carbonization plant for industrial biochar production. Commercial production requires environmental approval (the pyrolysis process must comply with air pollutant emission standards). Mingjie Group also provides advanced exhaust gas treatment systems.
For industrial coffee grounds biochar production, we offer a variety of carbonization equipment models, including the MJT-500, MJT-1000, MJT-2000, MJT-3000, and MJT-5000.
Multifaceted Values of Coffee Ground Biochar
Due to its rich carbon content and porous structure, biochar from coffee grounds has widespread applications in agriculture, environmental protection, energy, and other fields. Its cost is significantly lower than traditional coal or industrial activated carbon.
Soil Conditioner: Mixing biochar at 5%-10% of soil mass and applying it to farmland or flower pots can improve soil water and fertilizer retention, regulate soil pH, and promote soil microbial activity. Experimental data shows that applying biochar from coffee grounds to vegetable greenhouses can increase tomato yields by 15%-20% and soil organic matter content by 8%-12%.
Water Purification Material: Activated coffee ground biochar can be added to filter devices to absorb heavy metals, dyes, and organic pollutants from water. Research has shown that 1 gram of coffee ground biochar can adsorb 50-80 mg of lead ions, an adsorption efficiency that surpasses 60%-70% of commercial activated carbon.
Carbon Sequestration and Environmental Protection: The carbon in coffee ground biochar is highly stable and can remain fixed in the soil for decades or even centuries. It can reduce carbon dioxide emissions in the atmosphere, contributing to carbon neutrality. Furthermore, using biochar instead of coal as a fuel can reduce pollutant emissions by 40%-60%, reducing air pollution.
Biomass Biochar Project Analysis
The coffee grounds biomass to biochar production is a low-cost, high-value environmentally friendly project. It not only solves the problem of coffee ground waste disposal, but also creates a practical environmentally friendly material.
Coffee ground biochar projects can recycle waste resources, transforming the large amounts of discarded coffee grounds generated by the food and beverage industry (coffee shops, fast food restaurants) into high-value-added products. The biochar can be sold as a commodity, generating profit.
It also has environmental benefits by reducing landfill. Coffee grounds decompose anaerobically in landfills, producing methane (CH₄), a potent greenhouse gas.
Coffee ground biochar projects also offer carbon sequestration benefits. Biochar from coffee grounds is highly stable and can store carbon for hundreds or even thousands of years, making it a negative carbon emission technology. Applying biochar to soil improves soil structure, enhances water and fertilizer retention, and promotes microbial growth.
