A new phosphate-selective sorbent for the Rem Nut® process. Laboratory investigation and field experience at a medium size wastewater treatment plant

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 remova...

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Bibliographic Details
Published in:Water science and technology 2003-01, Vol.48 (1), p.179-184
Main Authors: PETRUZZELLI, D, DE FLORIO, L, DELL'ERBA, A, LIBERTI, L, NOTARNICOLA, M, SENGUPTA, A. K
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Conservation of Natural Resources
Educational institutions
Effluents
Exact sciences and technology
Fertilizers
Ion exchange
Ion exchangers
Laboratories
Landfills
Magnesium Compounds - chemistry
Mineral nutrients
Municipal wastewater
Nutrient removal
Other wastewaters
Phosphates
Phosphates - chemistry
Phosphates - isolation & purification
Phosphorus - isolation & purification
Pollutants
Pollution
Removal
Sewage - chemistry
Sludge
Struvite
Waste disposal sites
Waste Disposal, Fluid - methods
Wastewater
Wastewater treatment
Wastewater treatment plants
Wastewaters
Water treatment and pollution
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Summary: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.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2003.0048