Cod Removal from Sewage by Activated Carbon from Rice Husk- An Agricultural By Product

The study deals with utilization of an agricultural by-product, risk husk for the removal of Chemical Oxygen Demand (COD) from sewage. Rice husk was processed into Rice Husk Activated Carbon (RHAC), a more useful form, by using phosphoric acid. The characteristics of raw sewage like pH and initial COD and the characteristics of adsorbent were measured. The mechanism of removal of COD by adsorption onto RHAC was studied by Batch process, under varying adsorbent dosage and pH of the solution to find the optimum conditions. RHAC was found to remove 92.37 % COD at dosage 5 gm and pH 6