Investigation of bioethanol production methods from agricultural waste

احمدی, محمد Investigation of bioethanol production methods from agricultural waste. In: 2nd International and 6th National Iranian Congress on Organic vs. Conventional Agriculture, August 2019, Ardabil, Iran.

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Abstract

Following the increasing use of energy in the world, concerns over the fossil fuel consumption and environmental issues resulting from the use of these fuels, much research has been done to build clean and renewable fuels. One of the suitable alternatives is biomass fuel production and today the use of lignocellulosic materials such as wood produced by trees and agricultural lignocellulosic waste as third generation biomass energy has attracted much attention. Ethanol is an energy source for the future of crude oil. Lignocellulosic materials are used to produce ethanol and the main process of converting these materials into bioethanol involves two main steps: hydrolysis of cellulose in lignocellulosic materials and the production of sugars and fermentation of sugars into ethanol. The most abundant and cheapest source of bioethanol production is agricultural waste from crops such as corn, wheat, barley, rice, potatoes, beans and the like. The cost of producing ethanol from lignocellulosic materials is very high based on existing technologies and all the recent efforts of the researchers are in improving the hydrolysis process of these materials. There are various methods to extract hemicellulose from agricultural waste to produce ethanol, the most important of which are acid hydrolysis, hydrothermal, ethohydrolysis, alkali treatment, enzymatic treatment, and ammonia blasting. Each of these methods has its disadvantages and benefits. Among these methods are the use of dilute acid for faster reaction speed, less equipment crushing and lower catalytic costs, as well as ethohydrolysis for extraction. Many hemicelluloses are more potent than other methods.

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