Evaluating the Effect of Different Burning Techniques on the Chemical Composition

After maize and sugar cane, rice was ranked as third position as a horticultural commodity. At global level, majority of Asian countries produce and consume the rice. Disposing of rice husk is a big problem and needs attention. In the present study, three different techniques were compared for converting rice husk (RH) into rice husk ash (RHA). The RHA obtained by combustion in drum for 24 hours yielded maximum quantity 97.703 % of SiO2. Therefore, this method was adopted for further studies on samples collected from different regions (Charsada, Swat and Buner) of Province of Khyber Pakhtunkhwa (KPK), Pakistan. By comparing the contents of SiO2 obtained from combustion technique, the Charsada sample containing 97.073% of SiO2 was found best. Keywords— Rice husk ash, Silica, Waste, SCM, XRF.