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Related Concept Videos

Biofuels01:25

Biofuels

The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
Microbial Bioremediation of Hydrocarbons01:26

Microbial Bioremediation of Hydrocarbons

Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
Lipid Catabolism01:25

Lipid Catabolism

Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
Bioremediation00:46

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
Production of Organic Acids01:25

Production of Organic Acids

Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
Bioplastics01:27

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...

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Related Experiment Video

Updated: Jun 8, 2026

Ultrasonic-Assisted Preparation of Biodiesel Products from Vegetable Oils
04:40

Ultrasonic-Assisted Preparation of Biodiesel Products from Vegetable Oils

Published on: April 19, 2024

Biodiesel production using waste frying oil.

Trupti W Charpe1, Virendra K Rathod

  • 1Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India.

Waste Management (New York, N.Y.)
|October 5, 2010
PubMed
Summary

This study optimized biodiesel production from waste sunflower oil using enzymatic transesterification. Pseudomonas fluorescens enzyme and stage-wise methanol addition significantly boosted methyl ester conversion.

Area of Science:

  • Biotechnology
  • Chemical Engineering
  • Renewable Energy

Background:

  • Waste sunflower frying oil presents a sustainable feedstock for biodiesel production.
  • Enzymatic transesterification offers an eco-friendly alternative to chemical catalysis for biodiesel synthesis.

Purpose of the Study:

  • To optimize enzymatic transesterification of waste sunflower oil for enhanced biodiesel yield.
  • To identify the most effective microbial lipase and optimal reaction conditions.
  • To compare the efficiency of using waste sunflower oil versus refined sunflower oil.

Main Methods:

  • Screening of various microbial lipases for transesterification efficiency.
  • Investigating the impact of temperature, methanol:oil ratio, enzyme concentration, and solvent type.

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Laboratory Production of Biofuels and Biochemicals from a Rapeseed Oil through Catalytic Cracking Conversion
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Laboratory Production of Biofuels and Biochemicals from a Rapeseed Oil through Catalytic Cracking Conversion

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  • Implementing a stage-wise methanol addition strategy to mitigate inhibition.
  • Comparing biodiesel conversion rates using waste and refined sunflower oil.

    • Main Results:

    • Pseudomonas fluorescens enzyme demonstrated the highest catalytic activity.
    • Optimal conditions identified: 45 °C, 5% enzyme concentration, 3:1 methanol:oil molar ratio.
    • Stage-wise methanol addition increased conversion from 55.8% to 63.84% over 24 hours.
    • Non-polar solvents outperformed polar solvents in enhancing conversion.

    Conclusions:

    • Enzymatic transesterification using P. fluorescens is a viable method for waste sunflower oil biodiesel production.
    • Optimized conditions and stage-wise methanol addition significantly improve biodiesel yield.
    • Waste sunflower oil can be effectively converted to biodiesel, comparable to refined oil under optimized conditions.