Naivasha central wastewater treatment plant (ponds) (4427167562).jpg

The treatment of wastewater using conventional methods consumes significant amounts of energy.[1]

However, wastewater actually contains biochemical energy, which is normally thrown away, or worse, discarded as pollution. Biochemical oxygen demandW is a measure of pollution, but also indicates the energy content of the wastewater.

Methods of extracting energy[edit | edit source]

Biogas is one method with the potential for use as an appropriate technology.

Various waste-to-energyW technologies including incinerationW can be used to dispose of solid waste. This includes dried sewage sludge.W

Microbial fuel cellsW are a completely new method of energy recovery, and are currently under development. They could be used to produce electricity; also they could produce hydrogen - the BioElectrochemically Assisted Microbial Reactor (BEAMR) method is claimed to yields four times the hydrogen of fermentation alone.[2]

Notes[edit | edit source]

  1. According to one estimate, "In the USA... 5% of electricity we produce is used to treat water and wastewater." - from Microbial Fuel Cells, B.E. Logan, 2005. Does this include the cost of contructing colleciton and treatment facilities, including the embedded energyW in the materials?[expansion needed]
  2. 2005 Popular Mechanics Breakthrough Awards (published in the November 2005 issue). According to this update (Nov 2007) efficiency has reached 82%. For more information, see Microbial Fuel Cells, by Bruce Logan of Penn State University (2005), who won a 2005 Popular Mechanics Breakthrough Award.[1][dead link]
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Keywords energy, wastewater, industrial ecology, energy, energy efficiency, environmental philosophy, industry, sustainability, waste management
SDG SDG06 Clean water and sanitation, SDG07 Affordable and clean energy
Authors Chris Watkins
License CC-BY-SA-3.0
Derivatives Energie aus Abwasser
Language English (en)
Related subpages, pages link here
Impact 386 page views
Created October 16, 2007 by Chris Watkins
Modified October 23, 2023 by StandardWikitext bot
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