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Biofuels

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...

Environmental Applications of Microorganisms

Environmental Applications of Microorganisms

Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...

Microbial Fuel Cells

Microbial Fuel Cells

Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...

Bioremediation

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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.

Microbes and Methanogenesis

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Methanogenesis is a critical microbial process in anaerobic ecosystems responsible for the biological production of methane, a potent greenhouse gas and valuable biofuel. This metabolic pathway is primarily facilitated by methanogenic archaea, which thrive in anoxic environments such as wetlands, sediments, and animal gastrointestinal tracts. The absence of oxygen in these habitats prevents aerobic respiration, thereby favoring alternative biochemical pathways for organic matter degradation.In...

Microbial Bioremediation of Hydrocarbons

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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...

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Biogas Purification through the use of a Microalgae-Bacterial System in Semi-Industrial High Rate Algal Ponds

Biogas Purification through the use of a Microalgae-Bacterial System in Semi-Industrial High Rate Algal Ponds

Published on: March 22, 2024

Biogas as a resource-efficient vehicle fuel.

Pål Börjesson¹, Bo Mattiasson

¹Environmental and Energy Systems Studies, Department of Technology and Society, Lund University, Box 118, SE-221 00 Lund, Sweden. pal.borjesson@miljo.lth.se

Trends in Biotechnology

|November 27, 2007

Summary

Biogas offers environmental and resource-efficiency advantages over other biomass fuels. Further development can reduce costs, making biogas more economically competitive for transport sector use.

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Area of Science:

Renewable Energy
Sustainable Transportation
Biomass Conversion Technologies

Background:

Global push for renewable fuels in transportation.
Limitations of current bioethanol and biodiesel production regarding resource efficiency and greenhouse gas emissions.
Need for more sustainable biofuel alternatives.

Purpose of the Study:

To highlight biogas as a complementary and advantageous biofuel strategy.
To motivate technological advancements for biogas production and utilization.
To improve the economic competitiveness of biogas as a vehicle fuel.

Main Methods:

Analysis of existing biofuel production routes (bioethanol, biodiesel, lignocellulose-based biofuels).
Evaluation of biogas production from organic residues, energy crops, and byproducts.
Comparative assessment of environmental and resource-efficiency perspectives of various biofuels.
Identification of technological development needs for cost reduction.

Main Results:

Lignocellulose-based biofuels and novel conversion technologies offer improved efficiency.
Biogas production from diverse feedstocks presents a complementary strategy.
Biogas demonstrates significant environmental and resource-efficiency advantages compared to other biomass-based vehicle fuels.
Cost reduction is identified as key to increasing biogas economic competitiveness.

Conclusions:

Biogas is a promising renewable fuel with notable environmental and resource-efficiency benefits.
Technological innovation is crucial for reducing biogas production costs.
Enhancing biogas economic competitiveness can accelerate its adoption in the transport sector.