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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 Growth Measurement: Indirect Methods01:27

Microbial Growth Measurement: Indirect Methods

Estimating microbial growth is essential for understanding population dynamics and environmental adaptations. Indirect methods provide valuable insights by measuring parameters such as turbidity, metabolic activity, and biomass, enabling efficient and reproducible assessments.During exponential growth, microbial cells scatter light proportionally to their biomass, a principle used in turbidity measurements. About one million cells per milliliter produce detectable scattering, which a...
Microbial Growth Measurement: Direct Methods01:23

Microbial Growth Measurement: Direct Methods

Direct methods for measuring microbial populations in a culture are essential tools in microbiology, providing quantitative data for various applications. Among these, microscopic counts, plate counts, and serial dilution are widely used techniques, each with unique principles and applications.Microscopic CountsMicroscopic counting involves the use of a Petroff-Hausser chamber, a specialized microscope slide with a grid and defined depth. By observing a liquid culture under a microscope,...
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...
Microbial Growth Media01:27

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Microbial growth media are essential tools in microbiology, providing the nutrients and conditions necessary to cultivate and study microorganisms. These media are categorized by their composition, consistency, and functional roles, enabling researchers to investigate microbial physiology, behavior, and interactions.Types and Consistencies of Growth MediaGrowth media can be solid, liquid, or semisolid. Solid media, often agar-based, allow visible colony growth for isolation and enumeration.
Microbial Fermentation01:23

Microbial Fermentation

Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...

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Updated: Jun 3, 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

Microbial growth studies in biodiesel blends.

Gitte Sørensen1, Dennis V Pedersen, Anna K Nørgaard

  • 1Danish Technological Institute, Kongsvang Alle 29, DK-8000 Aarhus C, Denmark. gsn@dti.dk

Bioresource Technology
|March 8, 2011
PubMed
Summary
This summary is machine-generated.

Biodiesel blends show increased microbial growth and activity compared to fossil diesel, with identified anaerobic microorganisms like methanogens and sulfate-reducing bacteria. This highlights the need for monitoring methods for safer biodiesel integration.

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Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass
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Isolation and Screening from Soil Biodiversity for Fungi Involved in the Degradation of Recalcitrant Materials
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Isolation and Screening from Soil Biodiversity for Fungi Involved in the Degradation of Recalcitrant Materials

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Ultrasonic-Assisted Preparation of Biodiesel Products from Vegetable Oils
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Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass
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Isolation and Screening from Soil Biodiversity for Fungi Involved in the Degradation of Recalcitrant Materials
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Isolation and Screening from Soil Biodiversity for Fungi Involved in the Degradation of Recalcitrant Materials

Published on: May 16, 2022

Area of Science:

  • Microbiology
  • Environmental Science
  • Fuel Science

Background:

  • Biodiesel integration into the fuel matrix presents challenges.
  • Microbial contamination in fuel storage is a concern.
  • Understanding microbial interactions with fuel blends is crucial.

Purpose of the Study:

  • To investigate the microbiological stability of biodiesel-diesel blends.
  • To assess bacterial growth and activity in microcosms with biodiesel.
  • To identify microorganisms present in contaminated fuel blends.

Main Methods:

  • Incubation of diesel-biodiesel blends in small-scale microcosms.
  • Use of contaminated diesel storage tank water for inoculation.
  • Analysis using DAPI (4′,6-diamidino-2-phenylindole) and qPCR (quantitative Polymerase Chain Reaction).
  • Chemical analyses to confirm microbial presence and activity.

Main Results:

  • Increased bacterial growth and activity observed in biodiesel blends compared to fossil diesel.
  • Identification of several anaerobic microorganisms, including methanogens, sulfate-reducing bacteria, and nitrate-reducing bacteria.
  • Confirmation of methane formation in biodiesel incubations.

Conclusions:

  • Biodiesel blends support higher microbial growth and activity than fossil diesel.
  • Specific anaerobic microbial groups thrive in biodiesel environments.
  • Findings support the development of monitoring strategies for safe biodiesel implementation.