Many people view sawdust merely as waste generated during wood processing—something of little value.
In reality, however, once subjected to carbonization, ordinary sawdust can be transformed into high-value biochar, which is widely utilized in fields such as fuel, agriculture, metallurgy, and even environmental protection.
Simply put, it primarily involves the following steps:
First, it is necessary to control the size and moisture content of the wood chips.
If the wood chips are too wet:
The processed wood chips enter a carbonization furnace, where the temperature typically reaches several hundred degrees or higher. Under oxygen-deficient conditions, the wood chips do not undergo direct combustion but instead undergo gradual thermal decomposition.
This stage yields:
Freshly produced biochar is extremely hot. If exposed directly to air, it may reignite. Therefore, many production lines are equipped with cooling systems.
Only after the biochar has cooled can it be packaged or subjected to further processing.
Common applications include:
Compared to many agricultural wastes, wood chips offer several distinct advantages:
Wood chips are not merely waste material. Through carbonization, they can be transformed into high-value biochar, thereby enabling resource reuse.
With environmental standards becoming increasingly stringent, biomass carbonization is emerging as an increasingly popular green energy solution.
