This presentation talks about separated wastewater as a new source for fertiliser production and includes 5 conventional options for concentration/solidification: 1. Membrane filtration; 2. Precipitation with iron and aluminium; 3. Precipitation and treatment with lime; 4. Struvite production; 5. Ammonia stripping in closed loop.
VRAALE, L. JENSSEN, P.D. (2005): Source Separated Wastewater a New Resource for Producing Mineral Fertilizer. Durban: 3rd. International Conference on Ecological Sanitation. [Accessed: 05.06.2012] PDF