In recent times, much attention is gaining on corncobs as a viable feed stock for the production of reducing sugars, and some efforts are done on the pretreatment of corncobs. Foe effective biomass pre-treatment and hydrolysis of agricultural wastes, methods such as dilute acid, aqueous ammonia, individually and in combinations are well studied. Pretreatment step is critical in the entire sugar production or bioethanol production process as it involves high cost of operation. To make this step and whole process economically viable, process should be at low energy and water consumption, low investment costs inexpensive and easily recoverable reagents and applicability to various types of raw material are required.