53. By-products of Rice 1
- INDEX -
Rice Husks
Using Husks as a Heat Source
How used as a Heat Source
Using Ash from Burnt Rice Husk
Using Rice Husk Itself
Others
Rice Husks
There are too many rice husks in some places. It occupies 20-24% of the paddy produced, although the ratios differ by variety. So about 100 million tons of rice husks are generated annually in the world. There are almost no advanced applications of rice husks. The bulk density of rice husks is about 125kg/cubic meter. After crushing, it is about 335kg/cubic meter. Rice husks are bulky and difficult to handle and transport. On the other hand, the calorific value of rice husks is as high as about 8,000-12,000 KJ/kg. Therefore, rice husks are commonly used as a heat source.
Applications of rice husks are classified as heat source, industrial raw material, and agriculture.
Using Husks as a Heat Source
Household heat source:
Rice husks are used as heat source for household cooking in farming villages in some Asian country.
The combustion rate of husk is not high. A domestic husk stove has been developed to burn husks at a constant temperature.
In some countries, a special stove has been developed consisting of husk container, husk feeder, feed control provision, husk burner, cooking plate and ash disposal provision. This stove is used as a heat source for household cooking not only in farming villages but also in urban areas. In these cases, rice husks from rice mill are sold to consumers via fuel traders.