Value-Added Products of Rice Husk in Various Disciplines

Abstract

Abstract: Oryza sativa is a highly produced crop for human consumption and survival so as the most ever waste-generating crop in Asian parts of the world, this creates problems due to its ancient disposal system that occupies large spaces and harms the environment in many ways. Thus, in order to present this waste as a golden opportunity for economic development and sustainable development, this review aims to mention different value-added products like bioadsorbent, biofertilizers, bioinsulators, and superhydrophobic coatings that would show a great utilization of agricultural waste. One of the most studied products is bioadsorbant showing a very high absorbing capacity towards methylene blue and As (V) in the groups of dyes and metals respectively. Biofertilizers are found to be a good and better alternative to chemical fertilizers by having higher shelf life and a good carrier of microbes. Due to very high silica content, Rice Husk was found to be a better bioinsulators on the basis of lower thermal conductivity properties. This presence of silica which gives sufficient roughness also made it possible to produce superhydrophobic coatings better than other coatings. All four products have been thoroughly reviewed, which still require further research for other value value-added products. This review can give a most important direction towards lignocellulosic biomass utilization in different applications rather than just using it in the production of biofuel.