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posted April 01, 2007

Quick Cob Figures - Benefits of Cob

Just how much, how many, and what go into (or don't go into) the making of the cob structures?? Here are a few interesting figures to give you an idea of some of the ways cob construction is environmentally and people friendly:

Cob Courtyard Wall

Volunteer Participation
Summer 2005: approx 500 volunteers
Materials diverted from landfill
Clay: 337.5 cubic feet
Concrete: 225 cubic feet

Bio-toilet/Earthen Building (cancelled in 2007)

Volunteer Participation
Summer 2006: approx 200 volunteers
Summer 2007: project on hold
Summer 2008: approx 500 volunteers
Projected total: 700 volunteers
Projected total: 600 volunteers

Materials to be diverted from landfill
Clay: 477 cubic feet

Estimated reduction in conventional toilet uses per season:
Approx 6,900

Estimated water use avoided
(based on 6 litre flush): 41,400 litres
(based on 13 litre flush): 89,700 litres
Average: 65,550 litres

The Phoenix toilet model is rated to take up to 100 uses per day in the summer months. An average season would probably see about 6,900 uses of the facility. Taking this many flushes out of the conventional waste system saves approximately 65,550 litres of potable water from being flushed down the toilet. It also reduces:

-Additional water use during the sewage cleansing process;
-Emissions generated by the sewage cleansing process;
-Sewage system energy use;

-Emissions from creating the energy;
-Sludge hauling expense and emissions;
-Disposal costs; -Labour costs.

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