Lorenzo Liberti, Nicola Limoni, Antonio Lopez, Roberto Passing, Gianfranco Boari
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The rim-nut process at West Bari for removal of nutrients from wastewater: First demonstration
RIM-NUT, a new physico-chemical process for ammonia and phosphate removal from municipal secondary effluent by selective ion exchange, and precipitation of MgNH4PO4 slow-release fertilizer, has been tested in a 10 m3/h demonstration plant at West Bari Sanitation Station.
The three-month demonstration indicated the technical feasibility of the process to meet the stringent Italian concentration limits for N and P discharge, as well as to recover quantitatively nutrient species in the form of premium-quality fertilizer (N:P2O5:MgO=4:26:16), almost sterile with a tolerable concentration of heavy metals.
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