P-control technologies for municipal wastewater are essentially based on “destructive” methods, that lead to formation of concentrated solid-phases (sludge), usually disposed-off in controlled landfills. Ion exchange, as a “non-destructive” technology, allows for selective removal and simultaneous recovery of pollutants, which can be recycled to the same and/or related productive lines. In this context, the REM NUT® process removes nutrient species (HPO4=, NH4+, K+) present in biologically oxidised municipal effluents and recovers them in the form of struvites (MgNH4PO4; MgKPO4), premium quality slow release fertilisers. The main limitation to the extensive application of this ion exchange based process is the non-availability of selective exchangers for specific removal of nutrient species. This paper illustrates laboratory investigation and pilot scale development of a so-called “P-driven” modified REM NUT scheme based on a new phosphate-selective sorbent developed at Lehigh University, PA, USA.
A new phosphate-selective sorbent for the Rem Nut(r) process. Laboratory investigation and field experience at a medium size wastewater treatment plant
D. Petruzzelli, L. De Florio, A. Dell'Erba, L. Liberti, M. Notarnicola, A.K. Sengupta; A new phosphate-selective sorbent for the Rem Nut(r) process. Laboratory investigation and field experience at a medium size wastewater treatment plant. Water Sci Technol 1 July 2003; 48 (1): 179–184. doi: https://doi.org/10.2166/wst.2003.0048
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