SSWARS promotes innovative ecological sanitation systems for human excreta.
Ecological sanitation systems are systems which allow for the safe recycling of nutrients to crop production in such a way that the use of non-renewable resources is minimized. These systems have a strong potential to be sustainable sanitation systems if technical, institutional, social and economic aspects are managed appropriately. SSWARS has been able to construct a number of Fossa-Alterna superstructures in Kyebando, Kawempe Division, Kampala, since March, 2007
Eco-san systems have been of benefit in the following ways:
- Minimizing the introduction of pathogens from human excreta into the water cycle (groundwater and surface water) - a major consideration in low-lying geographies is ground water pollution by pit latrines. In many areas where the water table is high, pit latrines directly pollute the water table, potentially affecting the large numbers of people.
- Promotion of safe, hygienic recovery and use of nutrients (nitrogen and phosphorus), organics, trace elements, water and energy
- Preservation of soil fertility, improvement of agricultural productivity and food security
- Contribution to the conservation of resources through lower water consumption, substitution of mineral fertilizer and minimization of water pollution
- Less reliance on mined phosphorus for fertilizer production
- Energy reduction in fertilizer production: Urea is the major component of urine, yet we produce vast quantities of urea by using fossil fuels. By properly managing urine, treatment costs as well as fertilizer costs can be reduced.