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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...
Environmental Applications of Microorganisms01:30

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...
Batteries and Fuel Cells03:12

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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate light...
Chemiosmosis01:32

Chemiosmosis

Oxidative phosphorylation is a highly efficient process that generates large amounts of adenosine triphosphate (ATP), the basic unit of energy that drives many cellular processes. Oxidative phosphorylation involves two processes— the electron transport chain and chemiosmosis.
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Control of Power Flow01:30

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Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
07:55

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Published on: July 20, 2021

Membrane-based processes for sustainable power generation using water.

Bruce E Logan1, Menachem Elimelech

  • 1Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA. blogan@psu.edu

Nature
|August 17, 2012
PubMed
Summary
This summary is machine-generated.

Discover sustainable energy from water using innovative membrane systems. Technologies like pressure-retarded osmosis and reverse electrodialysis harness natural salinity gradients, while microbial fuel cells utilize wastewater organic matter for power generation and treatment.

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Area of Science:

  • Environmental Science
  • Energy Science
  • Materials Science

Background:

  • Water is essential for traditional energy processes like combustion and hydroelectric power.
  • Emerging technologies offer novel ways to generate power from natural and wastewater resources.

Purpose of the Study:

  • To explore sustainable membrane-based systems for energy capture from water.
  • To investigate the potential of pressure-retarded osmosis and reverse electrodialysis for seawater energy extraction.
  • To examine the use of microbial fuel cells for simultaneous wastewater treatment and power generation.

Main Methods:

  • Utilizing pressure-retarded osmosis and reverse electrodialysis to exploit natural salinity gradients in seawater.
  • Generating artificial salinity gradients using thermolytic salts to capture waste heat energy.
  • Employing microbial fuel-cell technology to convert organic matter in wastewater into electrical energy.

Main Results:

  • Pressure-retarded osmosis and reverse electrodialysis are identified as key sustainable methods for energy capture from seawater.
  • Thermolytic salts can be used to create artificial salinity gradients for energy recovery from waste heat.
  • Microbial fuel cells demonstrate potential for combined wastewater treatment and energy production.

Conclusions:

  • Membrane-based systems offer promising avenues for sustainable energy generation from various water sources.
  • The integration of these technologies can contribute to both energy security and environmental remediation.