How to make biochar from agricultural waste?

Agricultural production generates a large amount of waste every year, such as rice husks, straw, corn stalks, and fruit tree branches. These agricultural wastes can actually be transformed into valuable biochar through appropriate methods: pyrolysis/carbonization process. The process of producing biochar from waste not only helps reduce waste accumulation but also contributes to sustainable farming, carbon sequestration, and even energy production.

If you are interested in making biochar from agricultural waste, follow along to learn about the detailed production process.

Step 1: Choose the Right Agricultural Waste

Common materials used for biochar production include rice husks, straw, coconut shells, and bagasse. These materials are rich in carbon and can be processed into high-quality biochar. When selecting agricultural waste, it is essential to consider the material's moisture content and particle size, as these factors affect the efficiency of the pyrolysis process. If necessary, the raw materials must be pretreated before biochar production, such as by crushing and drying, to ensure their size and moisture content meet carbonization requirements.

Step 2: Set Up the Pyrolysis System

To convert agricultural waste into biochar, you need a reliable pyrolysis system. During pyrolysis, organic materials such as agricultural waste are heated in the absence of oxygen. This process breaks down the waste into carbon, which is then stored in the form of biochar. Henan DOING Company specializes in designing and manufacturing biochar making equipment for agricultural waste. Our equipment uses advanced pyrolysis technology to ensure high biochar yield with minimal emissions. The system operates in a sealed, oxygen-deficient environment, which helps maintain the quality of the final product.

Agricultural waste to biochar production pyrolysis machine

Step 3: Pyrolyze the Agricultural Waste

After the system is set up, the agricultural waste is fed into the pyrolysis machine. The material is then heated to high temperatures in the absence of oxygen, which breaks down the organic matter and converts it into biochar. Depending on the type of equipment and the material being processed, this process typically takes several hours.

Step 4: Collect the Biochar

After the pyrolysis process is complete, the biochar needs to be cooled and collected. If necessary, it may be activated or screened to meet the needs of different applications. Biochar made from agricultural waste can now be used in a variety of fields, such as improving soil health&fertility, reducing greenhouse gas emissions, storing carbon credit, or as a sustainable fuel source.

Uses of biochar from pyrolysis of agricultural waste

In the resource utilization of agricultural waste, the performance of carbonization machine has a significant impact on the quality and efficiency of biochar production. Traditional earthen biochar making kilns or simple devices often suffer from inaccurate temperature control and insufficient flue gas treatment. DOING's modern biochar production pyrolysis machine has made several improvements in pyrolysis stability, waste gas treatment, and automation.

① Heating the bottom of the reactor transfers heat more evenly, preventing localized combustion or incomplete carbonization. Simultaneously, pre-treatment equipment such as crushing and drying ensures consistent particle size and moisture content of the agricultural waste raw materials entering the pyrolysis reactor, reducing fluctuations in the pyrolysis process from the source.

② The entire biochar production pyrolysis machine and gas conveying pipeline employs a high-strength sealing design to prevent the leakage of harmful gases. The dust collector is used to capture and treat the flue gas or waste gas after combustion, ensuring emissions meet standards.

DOING biochar production pyrolysis machine and dust removal machine

③ The entire biochar production process is controlled by a highly integrated PLC automated intelligent control system, which regulates the carbonization process and exhaust gas monitoring, ensuring the safety, efficiency, and intelligence of the pyrolysis process.

Utilizing agricultural waste to make biochar is a wise move to transform waste into a valuable resource. Henan DOING Company offers a full range of biochar making machine suitable for different scales of operation. Whether you are processing small quantities of agricultural waste or planning large-scale industrial biochar production, we can provide you with the right solution. We also offer full-service support, from installation and training to after-sales service, helping you confidently build a sustainable biochar business.