Sewage and Climate Change Impacts


We all need to be aware of the climate change impacts.

Sewage systems are significant contributors to carbon emissions.

Carbon dioxide emissions from food sources should be carbon neutral, however the following are not carbon neutral:
  • The carbon converted to methane gas in sewage catchments and at treatment plants
  • The carbon used to put the sewer system in place. This includes the greenhouse gas emission from the concrete, steel and other metals used in the collection and treatment of sewage, the earth moving and other machinery used to put the system in place.
  • The energy used to pump and process the sewage (estimated at 3% of the electrical energy used in the US. Reference.)
  • The energy used to replace corroded infrastructure.


Biosol’s role in reducing your greenhouse gas emissions.

Biosol products will minimise greenhouse gas emissions by:
  • Minimising methane and other biogas production in the sewer catchment
  • Reducing infrastructure corrosion and thus the energy used to replace infrastructure
  • Decreasing the energy needed to convert sulfides to sulfates at the treatment plant
  • Reducing biosolid volumes and thus handling costs and transport emissions
  • Increasing the available carbon at the treatment plant for conversion to methane gas for use as an energy source.

Current research shows that the potential energy in wastewater and biosolids can potentially meet up to 12% of the electricity demand. The current situation is that US wastewater treatment plants consume 3% of the nations electricity. Reference

See also Methane under the Sewer and Cost heading.
Methane gas is a significant greenhouse gas as well as an excellent energy resource if used correctly.

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