scholarly journals Microbial Conversion of Waste Glycerol from Biodiesel Production into Value-Added Products

Energies ◽  
2013 ◽  
Vol 6 (9) ◽  
pp. 4739-4768 ◽  
Author(s):  
Cheng Li ◽  
Keaton Lesnik ◽  
Hong Liu
Keyword(s):  
Value Added ◽  
Biodiesel Production ◽  
Microbial Conversion ◽  
Waste Glycerol ◽  
Value Added Products

scholarly journals Isolated Microorganisms for Bioconversion of Biodiesel-Derived Glycerol Into 1,3-Propanediol

2017 ◽  
Vol 74 (2) ◽  
pp. 43 ◽  
Author(s):  
Laura MITREA ◽  
Lavinia Florina CĂLINOIU ◽  
Gabriela PRECUP ◽  
Maria BINDEA ◽  
Bogdan RUSU ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Value Added ◽  
Biodiesel Production ◽  
Bacterial Strains ◽  
Nutrient Source ◽  
Raw Glycerol ◽  
Waste Glycerol ◽  
Microbial Development ◽  
High Concentrations ◽  
Value Added Products

During biodiesel production, massive amounts of raw glycerol are created generating an environmental issue and the same time an increase of biodiesel production cost at the same time. This raw glycerol could be converted by specific strains into value-added products, like 1,3-propanediol (1,3-PD), an important monomer used in the synthesis of biodegradable polyesters.The present work is based on recent scientific articles and experimental studies on the targeted topic, namely on the use of bacterial strains for bioconversion of biodiesel-derived glycerol into valuable products, like 1,3-PD. Concentrations, yields and productivity of 1,3-PD are presented for various bacterial strains. Important results as respects the microbial bioconversion of biodiesel-derived glycerol into 1,3-PD were registered for strains like Klebsiella pneumoniae, Citrobacter freundii, Escherichia coli and Lactobacillus diolivorans.From this study can be concluded that waste glycerol may be used as a nutrient source for microbial development and the production of 1,3-propanediol with high concentrations and yields.

scholarly journals Value-Added Products from Urea Glycerolysis Using a Heterogeneous Biosolids-Based Catalyst

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 373 ◽  
Author(s):  
Mattia Bartoli ◽  
Chengyong Zhu ◽  
Michael Chae ◽  
David Bressler
Keyword(s):  
Weight Ratio ◽  
Value Added ◽  
Economic Feasibility ◽  
Biodiesel Production ◽  
Wastewater Management ◽  
Thermal Hydrolysis ◽  
Process Economics ◽  
Air Stream ◽  
Increasing Temperature ◽  
Value Added Products

Although thermal hydrolysis of digested biosolids is an extremely promising strategy for wastewater management, the process economics are prohibitive. Here, a biosolids-based material generated through thermal hydrolysis was used as a catalyst for urea glycerolysis performed under several conditions. The catalytic system showed remarkable activity, reaching conversion values of up to 70.8 ± 0.9% after six hours, at 140 °C using a catalyst/glycerol weight ratio of 9% and an air stream to remove NH3 formed during the process. Temperature played the most substantial role among reaction parameters; increasing temperature from 100 °C to 140 °C improved conversion by 35% and glycidol selectivity by 22%. Furthermore, the catalyst retained good activity even after the fourth catalytic run (conversion rate of 56.4 ± 1.3%) with only a slight decrease in glycidol selectivity. Thus, the use of a biosolids-based catalyst may facilitate conversion of various glycerol sources (i.e., byproduct streams from biodiesel production) into value-added products such as glycidol, and may also improve the economic feasibility of using thermal hydrolysis for treatment of biosolids.

scholarly journals Valorization of Biodiesel Byproduct Crude Glycerol for the Production of Bioenergy and Biochemicals

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 609 ◽  
Author(s):  
Niravkumar Mahendrasinh Kosamia ◽  
Mahdieh Samavi ◽  
Bijaya Kumar Uprety ◽  
Sudip Kumar Rakshit
Keyword(s):  
Rapid Growth ◽  
Crude Glycerol ◽  
Value Added ◽  
Biodiesel Production ◽  
Microbial Lipid ◽  
Research Focus ◽  
Ongoing Research ◽  
Glycerol Conversion ◽  
Effective Utilization ◽  
Value Added Products

The rapid growth of global biodiesel production requires simultaneous effective utilization of glycerol obtained as a by-product of the transesterification process. Accumulation of the byproduct glycerol from biodiesel industries can lead to considerable environment issues. Hence, there is extensive research focus on the transformation of crude glycerol into value-added products. This paper makes an overview of the nature of crude glycerol and ongoing research on its conversion to value-added products. Both chemical and biological routes of glycerol valorization will be presented. Details of crude glycerol conversion into microbial lipid and subsequent products will also be highlighted.

scholarly journals A Review of Catalytic Upgrading of Biodiesel Waste Glycerol to Valuable Products

2020 ◽  
Vol 7 (3) ◽  
pp. 259-266
Author(s):  
Xue-Lian Li ◽  
Quan Zhou ◽  
Shen-Xi Pan ◽  
Yu He ◽  
Fei Chang
Keyword(s):  
Rapid Development ◽  
Production Capacity ◽  
Value Added ◽  
High Energy ◽  
Raw Material ◽  
Biodiesel Production ◽  
Catalytic Upgrading ◽  
Waste Glycerol ◽  
Catalytic Mechanisms ◽  
Specific Reactions

: Glycerol is an organic polyol compound, and is an important raw material with extensive applications in daily/petrochemical and pharmaceutical industry. Glycerol is typically obtained by propylene chlorination, while the method used is complicated process and requires high energy consumption. Interestingly, glycerol is recognized as a major by-product of biodiesel production. Approximately 100 kg of glycerol is yielded for 1 tonne of biodiesel production. With the rapid development of the biodiesel industry, glycerol production capacity has been a serious surplus. This review introduces the selective conversion of glycerol into a variety of value-added chemicals such as propylene glycol, propanol, glyceraldehyde, and dihydroxyacetone via selective hydrogenation and oxidation, as well as hydrocarbons and ethers via pyrolysis, gasification and etherification, respectively. The efficiency of different types of catalysts and the influence of reaction parameters on the valorisation of glycerol have been elucidated. Emphasis is also laid on the study of catalytic mechanisms and pathways for some specific reactions.

scholarly journals A Novel Biodiesel and Glycerol Carbonate Production Plant

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Nghi T. Nguyen ◽  
Yaşar Demirel
Keyword(s):  
Net Present Value ◽  
Economic Value ◽  
Value Added ◽  
Biodiesel Production ◽  
Glycerol Carbonate ◽  
Production Plant ◽  
Present Value ◽  
Carbonate Production ◽  
Market Values ◽  
Value Added Products

Crude glycerol is the byproduct of biodiesel production plant and the economic value of glycerol may affect the profitability of the biodiesel production plant. As the production rate of bioglycerol increases, its market values drop considerably. Therefore, conversion of bioglycerol into value-added products can reduce the overall cost, hence, leading to a more economical biodiesel production plant. In a direct carboxylation reaction, CO2 reacts with glycerol to produce glycerol carbonate and water. This study presents a direct comparison of the economic analysis of the conventional biodiesel production plant and the possible next generation biodiesel-glycerol carbonate production plant. At the end of 15-year project, the net present value of the biodiesel-glycerol carbonate production plant is $13.21 million higher than the conventional biodiesel plant. The stochastic model has predicted that the biodiesel-glycerol carbonate and conventional biodiesel production plants has about 30% and 63% chance of getting negative net present value, respectively. Heterogeneous catalyst, Ca3La1, is used for transesterification reaction to reduce separation steps in the biodiesel production process.

scholarly journals High value-added products derived from crude glycerol via microbial fermentation using Yarrowia clade yeast

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Magdalena Rakicka-Pustułka ◽  
Joanna Miedzianka ◽  
Dominika Jama ◽  
Sylwia Kawalec ◽  
Kamila Liman ◽  
...  
Keyword(s):  
Lipid Content ◽  
Food Production ◽  
Crude Glycerol ◽  
Animal Feed ◽  
Carbon Sources ◽  
Value Added ◽  
Microbial Fermentation ◽  
Waste Glycerol ◽  
High Consumption ◽  
Value Added Products

Abstract Background Contemporary biotechnology focuses on many problems related to the functioning of developed societies. Many of these problems are related to health, especially with the rapidly rising numbers of people suffering from civilization diseases, such as obesity or diabetes. One factor contributing to the development of these diseases is the high consumption of sucrose. A very promising substitute for this sugar has emerged: the polyhydroxy alcohols, characterized by low caloric value and sufficient sweetness to replace table sugar in food production. Results In the current study, yeast belonging to the Yarrowia clade were tested for erythritol, mannitol and arabitol production using crude glycerol from the biodiesel and soap industries as carbon sources. Out of the 13 tested species, Yarrowia divulgata and Candida oslonensis turned out to be particularly efficient polyol producers. Both species produced large amounts of these compounds from both soap-derived glycerol (59.8–62.7 g dm−3) and biodiesel-derived glycerol (76.8–79.5 g dm−3). However, it is equally important that the protein and lipid content of the biomass (around 30% protein and 12% lipid) obtained after the processes is high enough to use this yeast in the production of animal feed. Conclusions The use of waste glycerol for the production of polyols as well as utilization of the biomass obtained after the process for the production of feed are part of the development of modern waste-free technologies.

scholarly journals Opportunities Surrounding the Use of Sargassum Biomass as Precursor of Biogas, Bioethanol, and Biodiesel Production

2022 ◽  
Vol 8 ◽  
Author(s):  
Jorge Gabriel Orozco-González ◽  
Fernando Amador-Castro ◽  
Angela R. Gordillo-Sierra ◽  
Tomás García-Cayuela ◽  
Hal S. Alper ◽  
...  
Keyword(s):  
Brown Algae ◽  
Value Added ◽  
Local Economy ◽  
Biodiesel Production ◽  
Commercial Application ◽  
Mexican Caribbean ◽  
Challenges And Opportunities ◽  
Multiple Value ◽  
Potential Use ◽  
Value Added Products

Climate change (along with other factors) has caused an increase in the proliferation of brown algal mats floating freely along the Atlantic Ocean since 2011. These brown algae mats are composed of sea plants from the Sargassum genus. The gargantuan agglomeration of biomass flows alongside currents and lands in beaches belonging to the Eastern coasts of the Mexican Caribbean and several other countries in the region. These events, dubbed golden tides, harm the local economy and environment. Current elimination approaches involve the mechanical harvesting of the Sargassum and ultimate landfill disposal. However, explorations into the commercial application of other brown algae have elucidated the potential of Sargassum as a feedstock for valorization. This review informs the trends, challenges, and opportunities presented by the coastal invasion of this biomass. Primarily, the potential use of this material is as a precursor in biorefineries where multiple value-added products are generated concurrent with the ultimate production of biofuels.

scholarly journals Microwave-Assisted Glycerol Etherification Over Sulfonic Acid Catalysts

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1584 ◽  
Author(s):  
Laura Aguado-Deblas ◽  
Rafael Estevez ◽  
Marco Russo ◽  
Valeria La Parola ◽  
Felipa M. Bautista ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Sulfonic Acid ◽  
Value Added ◽  
Biodiesel Production ◽  
Important Goal ◽  
N2 Adsorption ◽  
Active Systems ◽  
X Ray ◽  
Value Added Products ◽  
Structure Properties

Glycerol is the main by-product of biodiesel production. For this reason, its valorization into value-added products, by using green procedures, represents an important goal. Different sulfonic acid silica- or titania-based catalysts were prepared, characterized and tested in the glycerol etherification process, assisted by microwaves, in order to obtain biodiesel additives. The surface and structural properties of the catalysts were investigated by means of N2 adsorption isotherms, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and acid capacity measurements by X-Ray Fluorescence Spectroscopy (XRF). The best performance in terms of activity was achieved in the presence of the sulfonic function directly linked to the amorphous silica. By the correlation of the structure properties of the materials and their activity, the performance of the catalysts was shown to be influenced mainly by the surface area, pore volume and acidity. Recycling experiments performed over the most active systems showed that the sulfonic silica-based materials maintained their performance during several cycles.

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