Living

A

Biogas-After sewage has been compos-ted, biogas can be collected for cooking. Biogas taps, like water kiosks, are primary social meeting areas.

B

C

D

A

Composting-Composed sewage can safely be spread as fertilizer. This is an important addition to Ouagadougou’s poor soil.

B

Employment-Composed sewage can provide employment opportunities for a population that is severely underemployed

C

Mixer-Human waste by itself cannot sustain the system. Therefore, animal waste and straw can be added. Reducing direct exposure to animal feces has health benefits as well

D

A

B

C

Urine and Feces Separation-Separation allows water to evapo-rate while more harmful residuals can be composed. This results in a reduction in soil pollution

A

Holding-Evaporation and holding tanks reduce groundwater contamination.

B

Compost-Dry compost is removed for agricultural uses and fuel.

C

A

DETAILED SECTION - HOUSING UNIT SEWAGE