TAILIEUCHUNG - Summary of dissertation Environmental engineering: Research on the combination of esterases and hydrolases from fungi to convert agro-industrial by-products into bioethanol

Currently, the ability to convert raw materials from lignocellulose-rich biomass by traditional methods has many limitations. Therefore, the objective of the thesis is to exploit a variety of biocatalysts (hydrolases) from fungi to efficiently convert lignocellulose-rich biomass from ABP into sugars (C5 and C6) capable of fermenting for bioethanol production. The thesis uses "enzyme cocktail" synergistic catalyst to increase the ability of biological transformation. | I. INTRODUCTION 1. The necesssity of the dissertation Currently energy demand is always a problem for any country in the world. Among the alternative energy sources currently in use wind solar nuclear energy etc. bioenergy is an inevitable development trend especially in agricultural countries which are importing fuel. Based on production materials the bioenergy can be divided into 4 generations Generation I from starch such as corn cassava sugarcane Generation II from plant biomass such as rice corn wheat stalks bagasse Generation III from microalgae species and Generation IV - advanced fuel based on biochemical chemical thermal and chemical changes . They are divided into three groups biodiesel biogas and bioethanol. However bioethanol is a great concern because the government issued a decision to use E5 bio-fuel 5 bioethanol to replace RON 92 petrol nationwide on January 1 2018. Therefore the demand for bioethanol production and consumption is increasing. The production of bioenergy in general and bioethanol according to Generation I from starch sources cassava corn and sugar sugarcane is very popular. Besides bioethanol is also produced from lignocellulose according to the second generation. This source of materials mainly includes wood rice straw bagasse corn stalks are the biomass with the most common lignocellulose composition among lignocellulose-rich agricultural by-products ABP . However this material source is not used effectively but mainly by traditional methods such as mushroom farming animal feed composting for fertilizer burning. Therefore taking advantage of this substrate sources to produce bioethanol is an appropriate solution especially for countries with agriculture like Vietnam. Although the source of lignocellulose is very popular it is difficult to effectively utilize this biomass source for the production of higher value products mainly due to the complex structure of lignocellulose difficult to convert biochemicals. Therefore the task of

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