Carbonized rice husk can be used for a variety of purposes, some of which include:

1. Biomass energy: Carbonized rice husk can be used as biomass fuel. It can be burned to produce thermal energy, which can be used for heating or generating electricity. Carbonization improves combustion efficiency and reduces emissions.

2. Soil conditioner: Carbonized rice husk can be added to the soil as an organic fertilizer or soil conditioner. It improves soil structure, increases soil water retention and retains nutrients.

3. Filter material: Carbonized rice husk has a porous structure, so it can be used as filter material. It can be used to purify water sources and remove impurities and harmful substances from the water.

4. Building materials: Carbonized rice husk can be used to make building materials, such as rice husk boards. This material may have better thermal insulation properties and environmentally friendly properties.

5. Industrial use: Carbonized rice husk may be used for industrial applications, such as the production of activated carbon, chemical raw materials, etc.

6. Carbon-loading materials: Carbonized rice husks can be used as carbon-loading materials for adsorbing gases or chemical substances, such as in environmental protection and wastewater treatment.