engleză
Rice husk is an agricultural residue abundantly available in India. A huge amount of rice husk is discharged in India, and the rice husk is usually burned in the field, or in some cases it is used as a fuel for power plant. In both cases, the smoke generated with the burning process often causes serious domestic and also international environmental problems. It is very important to solve the problems, smoke and waste, in relation to the treatment of rice husk. Rice husk is one of the most silica rich raw materials containing about 90 - 98% silica. Rice husk large ash content and sodium silicate content in the ash it becomes economical to extract silica from the rice husk ash, which has wide market and also takes care of ash disposal. Rice husk is a popular boiler fuel and the ash generated usually creates disposal problems. The chemical process discussed not only provides a solution for waste disposal but also recovers a valuable silica product, together with certain useful associate recoveries.
