Chemical and Biological Deconstruction in the Conversion Process of Sorghum Biomass for Bioethanol

ABSTRACT

Currently, due to the reduction of pollutant emissions from transport and the obligations arising from the RED II Directive, there is a great need to develop alternative solutions directly affecting the quantity and quality composition of advanced biofuels. The study evaluated the impact of acid, alkaline, and laccase treatment of sorghum biomass in obtaining lignocellulosic ethanol and optimized them. The effect of H₂SO₄, NaOH, and laccase on the value of reducing sugars and the chemical composition of the solid fraction before and after the treatment was determined. Sorghum biomass before and after the pretreatment was analyzed by FTIR spectra and SEM. Then, the SSF process was carried out and the ethanol yield per 100 g of sorghum biomass was determined. In summary, sorghum biomass was found to be an interesting and promising source for use in bioethanol production. It was found that alkaline and laccase treatment of sorghum biomass are effective methods and are based mainly on delignification. The advantage of biomass laccase treatment is the low energy demand, the use of relatively inexpensive equipment, and the production of pollutants with a low environmental burden.

摘要

目前,由于运输污染物排放的减少和可再生能源指令（RED II)产生的义务,非常需要开发直接影响先进生物燃料数量和质量组成的替代解决方案. 研究了酸,碱和漆酶处理对高粱生物质制备木质纤维素乙醇的影响,并对其进行了优化. 测定了H2SO4,NaOH和漆酶对高粱生物量还原糖值的影响. 还测试了处理前后固体部分的化学成分. 利用FTIR光谱和SEM分析了预处理前后高粱生物量的变化. 然后,进行SSF过程并测定每100g高粱生物质的乙醇产量. 综上所述,高粱生物质被发现是一个有趣的和有前途的来源,用于生物乙醇生产. 结果表明,碱法和漆酶法处理高粱生物量是比酸法更有效的方法,主要以脱木素为主. 还原糖含量分别为577,613和212mg·g-1. 生物质漆酶处理的优点是能耗低,设备相对便宜,产生的污染物环境负担低.

KEYWORDS:

• Sorghum biomass
• lignocellulose complex
• acid
• alkaline and laccase pretreatment
• bioethanol

关键词:

• 高粱生物量
• 木质纤维素复合物
• 酸
• 碱性和漆酶预处理
• 生物乙醇