|Tartan of Alberta|
Their new approach:
- Separate toilet and kitchen water at the source - leaving greywater from other lines in a house, like laundry, shower and bathroom sink, for local treatment and reuse;
- Use an anaerobic digester to create methane directly from the toilet and kitchen water that can be burnt for combined heat and electricity production within the community;
- Transform the liquid from the residual *blackwater* into a second resource — an ammonium-phosphate compound called struvite that returns nutrients as a fertilizer for agricultural production;
- Treat greywater at the building or community level instead of community sewage being pumped to and from large centralized treatment plants - saving construction and maintenance costs; and
- Treated greywater is used for toilet flushing, clothes washing and garden irrigation.