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

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6301
Author(s):  
Hongshen Li ◽  
Hongrui Liu ◽  
Shizhong Li
Keyword(s):  
Phase Transition ◽  
Energy Consumption ◽  
Solid State ◽  
Solid State Fermentation ◽  
Low Cost ◽  
Cost Effective ◽  
Fuel Ethanol ◽  
Bioethanol Production ◽  
Whole Process ◽  
Vapor Permeation

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.

scholarly journals All-Solid-State Potentiometric Ion-Sensors Based on Tailored Imprinted Polymers for Pholcodine Determination

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1192
Author(s):  
Hisham S. M. Abd-Rabboh ◽  
Abd El-Galil E. Amr ◽  
Abdulrahman A. Almehizia ◽  
Ayman H. Kamel
Keyword(s):  
Solid State ◽  
Low Cost ◽  
Cost Effective ◽  
Pharmaceutical Formulations ◽  
Measurement Sensitivity ◽  
Serum Samples ◽  
Multiwalled Carbon ◽  
Imprinted Polymers ◽  
High Measurement ◽  
Liquid Chromatographic

In recent times, the application of the use of ion-selective electrodes has expanded in the field of pharmaceutical analyses due to their distinction from other sensors in their high selectivity and low cost of measurement, in addition to their high measurement sensitivity. Cost-effective, reliable, and robust all-solid-state potentiometric selective electrodes were designed, characterized, and successfully used for pholcodine determination. The design of the sensor device was based on the use of a screen-printed electrode modified with multiwalled carbon nanotubes (MWCNTs) as a solid-contact transducer. Tailored pholcodine (PHO) molecularly imprinted polymers (MIPs) were prepared, characterized, and used as sensory receptors in the presented potentiometric sensing devices. The sensors exhibited a sensitivity of 31.6 ± 0.5 mV/decade (n = 5, R2 = 0.9980) over the linear range of 5.5 × 10−6 M with a detection limit of 2.5 × 10−7 M. Real serum samples in addition to pharmaceutical formulations containing PHO were analyzed, and the results were compared with those obtained by the conventional standard liquid chromatographic approach. The presented analytical device showed an outstanding efficiency for fast, direct, and low-cost assessment of pholcodine levels in different matrices.

Screening of low cost agricultural wastes to maximize the fructosyltransferase production and its applicability in generation of fructooligosaccharides by solid state fermentation

2017 ◽  
Vol 118 ◽  
pp. 19-26 ◽  
Author(s):  
Mohd Anis Ganaie ◽  
Hemant Soni ◽  
Gowhar Ahmad Naikoo ◽  
Layana Taynara Santos Oliveira ◽  
Hemant Kumar Rawat ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Fermentation ◽  
Low Cost ◽  
Agricultural Wastes

scholarly journals Combined Vapor Permeation and Continuous Solid-State Distillation for Energy-Efficient Bioethanol Production

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2266
Author(s):  
Hongshen Li ◽  
Hongrui Liu ◽  
Yufang Li ◽  
Jilin Nan ◽  
Chen Shi ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Efficient ◽  
Simulation Software ◽  
Separation Performance ◽  
Flow Sheet ◽  
Bioethanol Production ◽  
Permeate Flux ◽  
Rectification Column ◽  
Vapor Permeation ◽  
Wide Range

Extracting ethanol by steam directly from fermented solid-state bagasse is an emerging technology of energy-efficient bioethanol production. With continuous solid-state distillation (CSSD) approach, the vapor with more than 25 wt% ethanol flows out of the column. Conventionally, the vapor was concentrated to azeotrope by rectification column, which contributes most of the energy consumption in ethanol production. As an alternative, a process integrating CSSD and vapor permeation (VP) membrane separation was tested. In light of existing industrial application of NaA zeolite hydrophilic membrane for dehydration, the prospect of replacing rectification operation with hydrophobic membrane for ethanol enriching was mainly analyzed in this paper. The separation performance of a commercial PDMS/PVDF membrane in a wide range of ethanol–water-vapor binary mixture was evaluated in the experiment. The correlation of the separation factor and permeate flux at different transmembrane driving force was measured. The mass and energy flow sheet of proposed VP case and rectification case were estimated respectively with process simulation software based on experimental data. Techno-economic analysis on both cases was performed. The results demonstrated that the additional VP membrane cost was higher than the rectification column, but a lower utilities cost was required for VP. The discount payback period of supplementary cost for VP case was determined as 1.81 years compared with the membrane service lifetime of 3 years, indicating that the hybrid CSSD-VP process was more cost effective and energy efficient.

scholarly journals Optimization of Lipase Production in Solid-State Fermentation by Rhizopus Arrhizus in Nutrient Medium Containing Agroindustrial Wastes

2018 ◽  
Vol 12 (1) ◽  
pp. 189-203 ◽  
Author(s):  
Georgi Dobrev ◽  
Hristina Strinska ◽  
Anelia Hambarliiska ◽  
Boriana Zhekova ◽  
Valentina Dobreva
Keyword(s):  
Solid State ◽  
Moisture Content ◽  
Solid State Fermentation ◽  
Lipase Activity ◽  
Nutrient Medium ◽  
Solid Medium ◽  
Low Cost ◽  
Lipase Production ◽  
Rhizopus Arrhizus ◽  
Agroindustrial Wastes

Background: Rhizopus arrhizus is a potential microorganism for lipase production. Solid-state fermentation is used for microbial biosynthesis of enzymes, due to advantages, such as high productivity, utilization of abundant and low-cost raw materials, and production of enzymes with different catalytic properties. Objective: The objective of the research is optimization of the conditions for lipase production in solid-state fermentation by Rhizopus arrhizus in a nutrient medium, containing agroindustrial wastes. Method: Biosynthesis of lipase in solid-state fermentation by Rhizopus arrhizus was investigated. The effect of different solid substrates, additional carbon and nitrogen source, particles size and moisture content of the medium on enzyme production was studied. Response surface methodology was applied for determination of the optimal values of moisture content and tryptone concentration. A procedure for efficient lipase extraction from the fermented solids was developed. Results: Highest lipase activity was achieved when wheat bran was used as a solid substrate. The addition of 1% (w/w) glucose and 5% (w/w) tryptone to the solid medium significantly increased lipase activity. The structure of the solid medium including particles size and moisture content significantly influenced lipase production. A mathematical model for the effect of moisture content and tryptone concentration on lipase activity was developed. Highest enzyme activity was achieved at 66% moisture and 5% (w/w) tryptone. The addition of the non-ionic surfactant Disponyl NP 3070 in the eluent for enzyme extraction from the fermented solids increased lipase activity about three folds. Conclusion: After optimization of the solid-state fermentation the achieved 1021.80 U/g lipase activity from Rhizopus arrhizus was higher and comparable with the activity of lipases, produced by other fungal strains. The optimization of the conditions and the use of low cost components in solid-state fermentation makes the process economicaly effective for production of lipase from the investigated strain Rhizopus arrhizus.

The Research on Solid-State Fermentation Technology of Fuel Ethanol Using in Straw

2011 ◽  
Vol 347-353 ◽  
pp. 1228-1232
Author(s):  
Yi Qiu ◽  
Yong Hong Huang ◽  
Yu Kun Sun ◽  
Li Huang ◽  
Hao Cheng
Keyword(s):  
Solid State ◽  
Solid State Fermentation ◽  
High Efficiency ◽  
Fuel Ethanol ◽  
Ethanol Solution ◽  
Enzyme Hydrolysis ◽  
Steam Explosion Pretreatment ◽  
Development Direction ◽  
Low Energy Consumption ◽  
Fermentation Technology

Based on the introduction of the major problems in solid-state fermentation of straw to produce fuel ethanol and its development direction, this paper systematically discuss the process that currently used.Through analyzing the characteristics of all phases such as pretreatment, hydrolysis and fermentation and so on,we put forward a new kind of process scheme. In this process, we use a mixed method which combined dilute sulfuric acids with steam explosion pretreatment method, after water washing, adopt the method of synchronized saccharification solid-state fermentation,by adding pichia and cellulase enzyme hydrolysis,and we can get ethanol solution at the same time of enzyme hydrolysis. Then through filtered, purified, denatured and so on, at last, we get the fuel ethanol. The equipment that this process requires is simple, and its fermentation have high efficiency high and low energy consumption.

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