Biobutanol Biofuel Production via ABE Fermentation from Bread Waste for an Energy-Sustainable Singapore

Butanol is an important compound used as a building block for producing value-added products and an energy carrier. The main butanol production pathways are conventional acetone–butanol–ethanol (ABE) fermentation and catalytic upgrading of ethanol. On the other hand, the application of biomass as a promising substrate for biofuel production has been widely considered recently. However, few studies have compared different butanol production pathways using biomass as raw material. In light of that, the present work aims (i) to provide a short review of the catalytic ethanol upgrading and (ii) to compare conventional ABE fermentation and catalytic ethanol upgrading processes from the economic and environmental perspectives. Aspen Plus v9.0 was used to simulate both processes. The economic and environmental assessments were carried out considering the Colombian economic context, a gate-to-gate approach, and single impact categories. Considering a processing scale of 1000 ton/d, the conventional ABE fermentation process presented a more favorable technical, economic, and environmental performance for butanol production from biomass. It also offered lower net energy consumption (i.e., 57.9 GJ/ton of butanol) and higher butanol production (i.e., 2.59 ton/h). Nevertheless, the proposed processing scale was insufficient to reach economic feasibility for both processes. To overcome this challenge, the minimum processing scale had to be higher than 1584 ton/d and 1920 ton/d for conventional ABE fermentation and catalytic ethanol upgrading, respectively. Another critical factor in enhancing the economic feasibility of both butanol production pathways was the minimum selling price of butanol. More specifically, prices higher than 1.56 USD/kg and 1.80 USD/kg would be required for conventional ABE fermentation and catalytic ethanol upgrading, respectively. From the environmental impact point of view, the conventional ABE fermentation process led to a lower potential environmental impact than catalytic ethanol upgrading (0.12 PEI/kg vs. 0.18 PEI/kg, respectively).

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Multi-Objective Optimization of an ABE Fermentation System for Butanol Production as Biofuel

International Journal of Chemical Reactor Engineering ◽

10.1515/ijcre-2018-0214 ◽

2019 ◽

Vol 17 (7) ◽

Author(s):

Hugo I. Velázquez-Sánchez ◽

Ricardo Aguilar-López

Keyword(s):

Immobilized Cells ◽

Industrial Process ◽

Continuous System ◽

Culture Conditions ◽

Abe Fermentation ◽

Biofuel Production ◽

Process Conditions ◽

Immobilized Cell ◽

Fermentation System ◽

Conflicting Objectives

Abstract In this work, a previously reported unstructured kinetic model of Clostridium acetobutylicum ATCC 824, validated with experimental data under different culture conditions, was used to determine the optimal process conditions from an ABE fermentation system for biofuel production. The goal of this work was to simultaneously maximize two conflicting objectives: volumetric productivity and final concentration of butanol considering both Fed-Batch and single-stage CSTR operation regimes using either a free or immobilized cell reactor. The result of the after mentioned strategy was the construction of the Pareto Fronts and optimal trajectories for the inlet solution feeding rate and concentration using a Sequential Quadratic Programming methodology. The obtained results suggest that the maximum concentration and productivity of butanol are achieved in a semi-continuous system operating with immobilized cells, obtaining values of 19.1454 kg m-3 and 0.3655 kg m-3 h-1, respectively, representing an increase of 48 % and 104 % compared to the most recent industrial process reported to date.

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NUMERICAL STUDY FOR THAILAND: MATHEMATICAL MODEL OF PRODUCTION AND LOGISTIC PLANNING FOR SUGARCANES USED IN BIOFUEL PRODUCTION

10.32738/ceppm.201310.0055 ◽

2013 ◽

Author(s):

Pancheewa Benjamasutin ◽

◽

Ponthong Rijana ◽

Phongchayont Srisuwan ◽

Aussadavut Dumrongsiri

Keyword(s):

Mathematical Model ◽

Numerical Study ◽

Biofuel Production ◽

Logistic Planning

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USE OF NORTHERN ECOTYPE SOYBEANS FOR BIOFUEL PRODUCTION

AGRICULTURAL ENGINEERING ◽

10.26897/2687-1149-2020-6-22-30 ◽

2020 ◽

pp. 22-30

Author(s):

SERGEY N. DEVYANIN ◽

◽

VLADIMIR A. MARKOV ◽

ALEKSANDR G. LEVSHIN ◽

TAMARA P. KOBOZEVA ◽

...

Keyword(s):

Diesel Engine ◽

Soybean Oil ◽

Diesel Fuel ◽

Experimental Studies ◽

Motor Fuel ◽

Biodiesel Production ◽

Biofuel Production ◽

Exhaust Gases ◽

Oil Productivity ◽

Toxic Components

The paper presents the results of long-term research on the oil productivity and chemical composition of soybean oil of the Northern ecotype varieties in the Central Non-Black Earth Region. The authors consider its possible use for biodiesel production. Experiments on growing soybeans were carried out on the experimental fi eld of Russian State Agrarian University –Moscow Timiryazev Agricultural Academy (2008-2019) on recognized ultra-early ripening varieties of the Northern ecotype Mageva, Svetlaya, Okskaya (ripeness group 000). Tests were set and the research results were analyzed using standard approved methods. It has been shown that in conditions of high latitudes (57°N), limited thermal resources of the Non-Chernozem zone of Russia (the sum of active temperatures of the growing season not exceeding 2000°С), the yield and productivity of soybeans depend on the variety and moisture supply. Over the years, the average yield of soybeans amounted to 1.94 … 2.62 t/ha, oil productivity – 388 … 544 kg/ha, oil content – 19…20%, the content of oleic and linoleic fatty acids in oil – 60%, and their output from seeds harvested – 300 kg/ha. It has been established that as soybean oil and diesel fuel have similar properties,they can be mixed by conventional methods in any proportions and form stable blends that can be stored for a long time. Experimental studies on the use of soybean oil for biodiesel production were carried out on a D-245 diesel engine (4 ChN11/12.5). The concentrations of toxic components (CO, CHx, and NOx) in the diesel exhaust gases were determined using the SAE-7532 gas analyzer. The smoke content of the exhaust gases was measured with an MK-3 Hartridge opacimeter. It has been experimentally established that the transfer of a diesel engine from diesel fuel to a blend of 80% diesel fuel and 20% lubrication oil leads to a change in the integral emissions per test cycle: nitrogen oxides in 0.81 times, carbon monoxide in 0.89 times and unburned hydrocarbons in 0.91 times, i.e. when biodiesel as used as a motor fuel in a serial diesel engine, emissions of all gaseous toxic components are reduced. The study has confi rmed the expediency of using soybeans of the Northern ecotype for biofuel production.

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Understanding biofuel production systems from an economic and environmental perspective

10.31274/etd-180810-5413 ◽

2016 ◽

Author(s):

Longwen Ou

Keyword(s):

Production Systems ◽

Biofuel Production

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PROSPECTS FOR THE DEVELOPMENT OF BIOFUEL PRODUCTION: WORLD EXPERIENCE

Economy, labor, management in agriculture ◽

10.33938/193-45 ◽

2019 ◽

pp. 45-53

Author(s):

N.D. Medvedeva

Keyword(s):

Biofuel Production

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The sugar and alcohol industry in the biofuels and cogeneration era: a paradigm change (part II)

Sugar Industry ◽

10.36961/si15275 ◽

2014 ◽

pp. 97-104 ◽

Cited By ~ 2

Author(s):

Electo Eduardo Silv Lora ◽

Mateus Henrique Rocha ◽

José Carlos Escobar Palacio ◽

Osvaldo José Venturini ◽

Maria Luiza Grillo Renó ◽

...

Keyword(s):

Large Scale ◽

New Technologies ◽

Process Integration ◽

Animal Feed ◽

Raw Materials ◽

Biofuel Production ◽

New Paradigm ◽

Alcohol Industry ◽

Feed Production ◽

Steam Parameters

The aim of this paper is to discuss the major technological changes related to the implementation of large-scale cogeneration and biofuel production in the sugar and alcohol industry. The reduction of the process steam consumption, implementation of new alternatives in driving mills, the widespread practice of high steam parameters use in cogeneration facilities, the insertion of new technologies for biofuels production (hydrolysis and gasification), the energy conversion of sugarcane trash and vinasse, animal feed production, process integration and implementation of the biorefinery concept are considered. Another new paradigm consists in the wide spreading of sustainability studies of products and processes using the Life Cycle Assessment (LCA) and the implementation of sustainability indexes. Every approach to this issue has as an objective to increase the economic efficiency and the possibilities of the sugarcane as a main source of two basic raw materials: fibres and sugar. The paper briefly presents the concepts, indicators, state-of-the-art and perspectives of each of the referred issues.

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