Rice Husk also has Its Value
Rice husk refers to the cortex of the rice grain, which is separated from the rice grains during the milling process. In some rice-producing areas, rice husk as one of the most widely available agricultural wastes. Globally, approximately 600 million tons of rice is produced each year, among which rice husk accounts for 20%, about 120 million tones produced annually, and this quantity is increasing every year. In the rice milling plant, rice husk is one of the main by-products.
Several years ago, people took rice straw and husks as waste, and burned them as firewood or dumped them on landfills or river, which caused serious environmental problems.
Nowadays, in countries like the USA, Canada, Australia, rice husk, and straw are not waste anymore. More and more people take a growing concern about the high organic chemical constituent like cellulose, lignin, and rest mineral components such as silica, alkalis, and trace elements in the rice waste.
The following table shows the organic content in rice husk
| Property | Range | |
| Bulk density(kg/m3) | 96-160 | |
| Hardness | Â Â % | 5-6 |
| Ash | % | 22-29 |
| Carbon | Â Â % | 33 |
| Hydrogen | Â Â Â % | 4-5 |
| Oxygen | Â Â % | 31-37 |
| Nitrogen | Â Â % | 0.23-0.32 |
| Sulphur | Â Â % | 0.04-0.08 |
| Moisture | Â Â % | 8-9 |
Turn Trash To Treasure
With the increasing awareness of environmental protection, more and more individuals would like to use machines with energy conservation and environmental protection. From an environmental point of view, some manufactures are turning rice husk into various products not only for the echo-conscious market place but also for the industrial sector.
Rice husk pellets
On the basis of the suitability of rice husk, it can be used for different applications according to its physical and chemical properties of the husk. There are several ways to the duty-cycle operation of rice waste. The most popular one is to pelletize rice husk into wood fuel pellets.
Rice husk is an ideal raw material for biomass fuel pellets. Compressed by wood pellet mill, rice husk pellets are getting an increasing market demand.
Biomass briquettes
rice husks are gathered and compressed into briquette by using biomass briquette machine, aiming to burn longer and make transportation of the goods easier. The key point of Biomass Briquette Machine is its compaction. Various press technologies that can be used during this process. One is the piston press, it is used to create solid briquettes for a wide array of purposes. The other is screw extrusion, it is used to compact biomass into loose, aims to produce the homogeneous briquettes which can substitute for coal in co-firing.
Make the Most of Rice Straw
Turning rice straw into quality compost with animal dung. In so many countries, people advocate renewable energy technologies that aim to achieve a more sustainable and efficient energy use. Some manufactures are taking full advantage of rice straw with animal dung, one of the important methods of waste treatment is composting. People compost them and make for organic fertilizer granules by using organic fertilizer granulators.
As we all know, both the animal dung and rice waste are rich in various organic matter, such as nitrogen, phosphorus, and potassium nutrients. Manufactures compost the rice waste and animal dung with compost turner for about 14 days outside and make them into granular appearance by using organic fertilizer granulators. It is a good way to make full use of recycling wastes and manage the organic material. The utilization of these organic materials can improve soil fertility and provide an opportunity to reduce its bulk, odor as well as increasing the nutritive value.
