Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 2

bioethanol production Related Abstracts

2 Production of Ethanol from Mission Grass

Authors: Thanyalak Chaisuwan, Apanee Luengnaruemitchai, Sujitra Wongkasemjit, Darin Khumsupan, Tidarat Komolwanich, Sirirat Prasertwasu

Abstract:

Bioethanol production has become a subject of interest for many researchers due to its potential to replace fossil fuels. Since the most popular sources of bioethanol originate from food crops including corn and sugarcane, many people become more concerned with increasing demand for food supply. Lignocellulosic biomass, such as grass, could be a practical alternative to replace the conventional fossil fuels due to its low cost, renewability, and abundance in nature. Mission grass (Pennisetum polystachion) is one of the candidates for bioethanol production. This research is focused on the detoxification and fermentation of hydrolysate from mission grass. Glucose in the hydrolysate was detoxified by overliming process at various pH. Although overliming at pH 12 gave the highest yeast population, the ethanol yield was low due to glucose degradation. Overliming at pH 10 showed the highest yield of ethanol production. Various strains of Baker’s yeast (Saccharomyces cerevisiae) will be utilized to produce ethanol at the optimal overliming pH.

Keywords: Detoxification, Lignocellulosic Biomass, Pennisetum polystachion, bioethanol production, overliming, Saccharomyces cerevisiae

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1 Life Cycle Assessment of Bioethanol from Feedstocks in Thailand

Authors: Apichit Svang-Ariyaskul, Thanapat Chaireongsirikul

Abstract:

An analysis of mass balance, energy performance, and environmental impact assessment were performed to evaluate bioethanol production in Thailand. Thailand is an agricultural country. Thai government plans to increase the use of alternative energy to 20 percent by 2022. One of the primary campaigns is to promote a bioethanol production from abundant biomass resources such as bitter cassava, molasses and sugarcane. The bioethanol production is composed of three stages: cultivation, pretreatment, and bioethanol conversion. All of mass, material, fuel, and energy were calculated to determine the environmental impact of three types of bioethanol production: bioethanol production from cassava (CBP), bioethanol production from molasses (MBP), and bioethanol production from rice straw (RBP). The results showed that bioethanol production from cassava has the best environmental performance. CBP contributes less impact when compared to the other processes.

Keywords: Chemical Engineering, biofuel, bioethanol production, LCA

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