Feasibility Study on Bioethanol Production by One Phase Transition Separation Based on Advanced Solid-State Fermentation

Abstract

To fulfill the consumption demand of low-cost fuel ethanol, an advanced process for feedstock fermentation and bioethanol extraction was required. This study proposed a process of combined continuous solid-state distillation and vapor permeation to extract ethanol from fermented sweet sorghum bagasse on the basis of advanced solid-state fermentation technology. Ethanol undergoes only one phase transition separation in the whole process, which drastically reduces energy consumption compared to the repeating phase transitions that occur in conventional bioethanol production. The mass balance and energy consumption of combining processes were simulated overall. A techno-economic evaluation was conducted on the flowsheet. Costs and profit of fuel ethanol produced by one phase transition separation bioethanol-producing technology were comprehensively calculated. The results of the present study show that the proposed process is an energy efficient and cost-effective alternative to conventional bioethanol production.

Cellulose Nanofiber Preparation Combined with Bioethanol Production from Fermented Sweet Sorghum Bagasse

“…There was no significant difference in distillation time at different alkali loadings, with an average of 56.2 min, which is close to the literature values of other lignocellulosic feedstock. − The most significant distinction of alkaline distillation on FSSB is that crude ethanol can be extracted under a similar pretreatment time and temperature . By simulating rectification and dehydration processes to enrich extracted crude ethanol vapor to fuel ethanol, with an input of 1257 kJ energy for 1 kg of FSSB, the energy output is 2132 kJ . The sugar in sweet sorghum stalks was produced into ethanol extracted in alkaline distillation, which is the reason of energy output.…”

“…36 By simulating rectification and dehydration processes to enrich extracted crude ethanol vapor to fuel ethanol, with an input of 1257 kJ energy for 1 kg of FSSB, the energy output is 2132 kJ. 38 The sugar in sweet sorghum stalks was produced into ethanol extracted in alkaline distillation, which is the reason of energy output. Hence, alkaline distillation combines ethanol stripping and lignocellulose pretreatment, which makes sweet sorghum, sugarcane, and other sugar-yielding crops have more energy saving advantages as raw materials for CNF production.…”

Solid-State Fermentation from Organic Wastes: A New Generation of Bioproducts

“…Saccharomyces cerevisiae [32] Wheat bran and white rice in SSF optimized by an experimental design to build a mathematical model. Lab scale incubators.…”

Compacted Silage Fermentation on Whole Sweet Sorghum Plant for Distributed Bioethanol Production

“…7−9 However, the challenge of preserving sugar crops for large-scale fuel ethanol industrialization remains a primary obstacle. 7,10 Sweet sorghum should be preserved for over 10 months after harvest to satisfy yearround production requirements. During the preservation period, biomass degradation and sugar loss due to high soluble sugar content will lead to a decline in ethanol production.…”

“…Advanced solid-state fermentation (ASSF) of sweet sorghum for bioethanol production offers the advantages of energy saving and the absence of waste water . Some 10,000-ton scale sweet sorghum ethanol demonstration projects have been launched in recent years. − However, the challenge of preserving sugar crops for large-scale fuel ethanol industrialization remains a primary obstacle. , Sweet sorghum should be preserved for over 10 months after harvest to satisfy year-round production requirements. During the preservation period, biomass degradation and sugar loss due to high soluble sugar content will lead to a decline in ethanol production. , Therefore, feedstock storage should be addressed to realize the potential of sweet sorghum as a viable source of fuel ethanol.…”