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{{Lang|[[Energie aus Abwasser|Deutsch]] - [[Energy from wastewater|English]]}} | |||
==Wastewater in an energy resource== | ==Wastewater in an energy resource== | ||
The [[wastewater treatment|treatment]] of [[wastewater]] using conventional methods consumes significant amounts of [[energy]].<ref>According to one estimate, "In the USA... 5% of electricity we produce is used to treat water and wastewater." - from [http://www.engr.psu.edu/ce/enve/mfc-Logan_files/mfc-Logan.htm Microbial Fuel Cells], B.E. Logan, 2005. Does this include the cost of contructing colleciton and treatment facilities, including the [[embedded energy]]{{ | The [[wastewater treatment|treatment]] of [[wastewater]] using conventional methods consumes significant amounts of [[energy]].<ref>According to one estimate, "In the USA... 5% of electricity we produce is used to treat water and wastewater." - from [http://www.engr.psu.edu/ce/enve/mfc-Logan_files/mfc-Logan.htm Microbial Fuel Cells], B.E. Logan, 2005. Does this include the cost of contructing colleciton and treatment facilities, including the [[embedded energy]]{{w|embedded energy}} in the materials?{{sp}}</ref> | ||
However, wastewater actually contains biochemical energy, which is normally thrown away, or worse, discarded as pollution. [[Biochemical oxygen demand]]{{ | However, wastewater actually contains biochemical energy, which is normally thrown away, or worse, discarded as pollution. [[Biochemical oxygen demand]]{{w|Biochemical oxygen demand}} is a measure of pollution, but also indicates the energy content of the wastewater. | ||
==Methods of extracting energy== | ==Methods of extracting energy== | ||
[[Biogas]] is one method with the potential for use as an [[appropriate technology]]. | [[Biogas]] is one method with the potential for use as an [[appropriate technology]]. | ||
Various [[waste-to-energy]]{{ | Various [[waste-to-energy]]{{w|Waste-to-energy}} technologies including [[incineration]]{{w|Incineration}} can be used to dispose of solid waste. This includes [[sludge drying|dried sewage sludge]].{{w|Sewage sludge treatment#Sludge disposal}} | ||
[[Microbial fuel cells]]{{ | [[Microbial fuel cells]]{{w|Microbial fuel cells}} 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.<ref>[http://www.popularmechanics.com/technology/industry/1762911.html?page=8 2005 Popular Mechanics Breakthrough Awards] (published in the November 2005 issue). According to [http://www.popularmechanics.com/technology/industry/4225816.html?page=3 this update] (Nov 2007) efficiency has reached 82%. For more information, see [http://www.engr.psu.edu/ce/enve/mfc-Logan_files/mfc-Logan.htm Microbial Fuel Cells], by Bruce Logan of [[Penn State University]] (2005), who won a 2005 Popular Mechanics Breakthrough Award.[http://www.popularmechanics.com/technology/industry/1762911.html?page=8]<sup>[dead link]</sup></ref> | ||
==Footnotes== | ==Footnotes== | ||
<references/> | <references/> | ||
[[Category:Wastewater]] | |||
[[Category:Energy]] | |||
[[Category:Industrial ecology]] | |||
Revision as of 00:16, 16 December 2017
Wastewater in an energy resource
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
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]
Footnotes
- ↑ 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]
- ↑ 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]