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Related Concept Videos

Line Loss01:10

Line Loss

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The different configurations of source-load connections include wye (star) and delta connections. The relationship between line and phase voltages and currents varies depending on the configuration. When the source is supplying power, it is transmitted through the wires to the load, and during this transmission, some power is absorbed by the wires, leading to line loss.
Line loss impacts power delivery efficiency in a balanced three-phase circuit. The symmetry in such a circuit simplifies the...
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Plant Cells and Tissues

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In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
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Plant Hormones

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Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.
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Tonicity in Plants00:53

Tonicity in Plants

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Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.
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Major Losses in Pipes01:28

Major Losses in Pipes

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When a fluid flows through a pipe, it experiences energy losses due to frictional resistance along the pipe walls, known as major losses. These energy losses result in a pressure drop, which varies based on the flow conditions — whether laminar or turbulent — and the specific physical properties of the fluid and pipe.
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Related Experiment Video

Updated: Jan 24, 2026

Author Spotlight: Scaling Microalgal Biotechnology for Enhanced Biomethane Production
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Methane loss from commercially operating biogas upgrading plants.

Torben Kvist1, Nabin Aryal2

  • 1Danish Gas Technology Centre (DGC), Dr. Neergaards Vej 5B, DK-2970 Horsholm, Denmark.

Waste Management (New York, N.Y.)
|May 22, 2019
PubMed
Summary
This summary is machine-generated.

Methane loss from biogas upgrading plants averages 0.81%, with water scrubbers showing the highest losses (1.97%). Regenerative thermal oxidizers effectively reduce these emissions, ensuring sustainable biogas production.

Keywords:
BiogasBiogas upgradingMethane lossRegenerative thermal oxidizer

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Area of Science:

  • Environmental Science
  • Chemical Engineering
  • Renewable Energy

Background:

  • Biogas technology, utilizing anaerobic digestion, is key for methane harvesting from waste.
  • Methane loss from biogas plants presents significant environmental and economic challenges, requiring further research.

Purpose of the Study:

  • To quantify process-related methane (CH4) loss in various commercial biogas upgrading plants.
  • To compare methane loss across different upgrading technologies: water scrubber, amine, and membrane-based systems.

Main Methods:

  • Direct measurements of methane loss were conducted across nine operational biogas upgrading facilities.
  • Comparative analysis of methane loss percentages based on the specific upgrading technology employed.

Main Results:

  • An average methane loss of 0.81% was observed across all investigated upgrading plants.
  • Water scrubber technology exhibited the highest methane loss (up to 1.97%), followed by membrane technology (up to 0.56%).
  • Amine-based upgrading showed minimal methane loss (0.04%).

Conclusions:

  • Water scrubbers are the most significant source of methane loss in biogas upgrading.
  • The application of regenerative thermal oxidizers can reduce waste gas methane emissions by 99.5%.
  • Implementing effective emission control technologies is crucial for sustainable biogas production.