Agricultural waste rice husks, after undergoing a special carbonisation process, can be converted into a high-quality valuable resource: biomass charcoal, specifically rice husk charcoal. After carbonisation, rice husks not only have widespread applications in the agricultural sector but also attract attention due to their unique properties and diverse functions.
Coconut shell biochar is produced using agricultural waste rice husks as raw material, processed through physical and chemical methods to create a renewable fuel. The production process for biochar can be divided into the following key steps:
First, fresh rice husks are collected as raw materials. Rice husks contain abundant cellulose and other organic substances, making them an ideal raw material for producing biomass charcoal.
Rice husks are first screened to remove impurities such as sand and soil. They are then crushed to a particle size of 2–5 mm to increase the reaction surface area, facilitating subsequent carbonisation processing.
If the moisture content of the rice husks is high, a dryer is used to reduce the moisture content to below 10%.
The pre-treated rice husks are then carbonised using a continuous carbonization furnace. The rice husks are heated to 400-600°C under controlled atmospheric conditions, causing the organic matter to undergo complete thermal decomposition. The volatile matter content during carbonisation must be controlled between 20% and 30%. The final product obtained after carbonisation is biomass charcoal. The yield after carbonisation is 30% to 50% of the raw material weight.
After carbonisation, rice husk charcoal forms a unique porous structure. Rice husk charcoal significantly improves soil properties. When porous rice husk charcoal is mixed into soil, can significantly enhance drainage and aeration properties, creating optimal conditions for plant growth. Additionally, rice husk charcoal possesses excellent water retention capabilities, with water-holding capacity exceeding 600 times its density, thereby enhancing soil water retention and fertility. Furthermore, the alkaline nature of rice husk charcoal helps adjust soil pH levels, neutralising acidic soils and creating more suitable growing conditions for crops. It also helps prevent pest infestations.
In summary, rice husk charcoal demonstrates remarkable effectiveness in agricultural applications, showcasing its unique value across various aspects from soil improvement to pest prevention. If you wish to produce biochar from rice husks, you will need to use a charcoal making machine. Please contact us for detailed information and quotes on the complete process of producing biomass charcoal from rice husks.