REM NUT Ion Exchange Plus Struvite Precipitation Process

Liberti, Lorenzo; Petruzzelli, Domenico; Florio, Loredana De

doi:10.1080/09593330409355443

Cited by 53 publications

(23 citation statements)

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“…These methods are based on the principle that nutrients from wastewaters are selectively exchanged in ion exchangers and struvite is precipitated after addition of Mg 2+ at controlled pH (Liberti et al, 1986(Liberti et al, , 2001Mijangos et al, 2004Mijangos et al, , 2013Ortueta et al, 2014). Sodium chloride is used as a regenerating solution in ion exchange columns; …”

Section: Ion Exchange Methodsmentioning

confidence: 99%

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Phosphorus recovery as struvite from farm, municipal and industrial waste: Feedstock suitability, methods and pre-treatments

et al. 2016

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Global population growth requires intensification of agriculture, for which a sustainable supply of phosphorus (P) is essential. Since natural P reserves are diminishing, recovering P from wastes and residues is an increasingly attractive prospect, particularly as technical and economic potential in the area is growing. In addition to providing phosphorus for agricultural use, stripping P from waste residues and effluents lessens their nutrient loading prior to disposal. This paper critically reviews published methods for P recovery from waste streams (municipal, farm and industrial) with emphasis on struvite (MgNH 4 PO 4 6H 2 O) crystallization, including pretreatments to maximize recovery. Based on compositional parameters of a range of wastes, a Feedstock Suitability Index (FSI) was developed as a guide to inform *Manuscript Click here to view linked References researchers and operators of the relative potential for struivite production from each waste.

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Section: Ion Exchange Methodsmentioning

confidence: 99%

“…For example, to overcome this issue in wastes containing high , the whole stream is processed for selective anion exchange (Liberti et al, 2001). Availability of specific anion exchangers for PO 4 3-sorption is the main limitation of this process (Petruzzeli et al, 2004).…”

Section: Ion Exchange Methodsmentioning

confidence: 99%

Phosphorus recovery as struvite from farm, municipal and industrial waste: Feedstock suitability, methods and pre-treatments

et al. 2016

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“…Processes available for P-treatment are generally classified into three general categories: chemical, physical, or biological-based treatment systems. Among physical-chemical methods, phosphorus removal is achieved using ion exchange [4,5], dissolved air flotation [6,7], and membrane filtration [8,9]. Filtration has been used either alone or in conjunction with a coagulation process as a means to remove phosphorus from wastewater [10,11].…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge

Mohammed

Rashid

2012

International Journal of Chemical Engineering

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The present study deals with the removal of phosphorus from wastewater by using oven-dried alum sludge (ODS) as adsorbent that was collected from Al-Qadisiya treatment plant (Iraq); it was heated in an oven at 105• C for 24 h and then cooled at room temperature. The sludge particles were then crushed to produce a particle size of 0.5-4.75 mm. Two modes of operation are used, batch mode and fixed bed mode, in batch experiment the effect of oven-dried alum sludge doses 10-50 g/L, pH of solution 5-8 with constant initial phosphorus concentration of 5 mg/L, and constant particle size of 0.5 mm were studied. The results showed that the percent removal of phosphorus increases with the increase of oven-dried alum sludge dose, but pH of solution has insignificant effect. Batch kinetics experiments showed that equilibrium time was about 6 days. Adsorption capacity was plotted against equilibrium concentration, and isotherm models (Freundlich, Langmuir, and Freundlich-Langmuir) were used to correlate these results. In the fixed bed isothermal adsorption column, the effect of initial phosphorus concentration (C o ) 5 and 10 mg/L, particle size 2.36 and 4.75 mm, influent flow rate (Q) 6 and 10 L/hr, and bed depth (H) 0.15-0.415 m were studied. The results showed that the oven-dried alum sludge was effective in adsorbing phosphorus, and percent removal of phosphorus reaches 85% with increasing of contact time and adsorbent surface area (i.e., mass of adsorbent 50 g/L with different pH).

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“…9,[13][14][15] Yet, improved selectivity of PO4 3− remains a critical need to facilitate use in full-scale applications. 11,16 Small-scale column tests of polymeric ligand exchangers indicate that improved selectivity of PO4 3− sorption and controlled release to recover the PO4 3− can be achieved using hydrated ferric oxide and/or Cu 2+ loading. 9,14,[17][18][19] Upon exhaustion of surface exchange sites, the media is regenerated with brine solution, link in the citation at the bottom of the page.…”

Section: Introductionmentioning

confidence: 99%

“…16,21,27,28 The present study directly compared performance of cation eluate combined with a range of P-specific anion regeneration eluates to precipitate N and P from dilute wastewater. Nutrient recovery and purity of the fertilizer were evaluated as these parameters directly influence process economics.…”

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confidence: 99%

Ion exchange-precipitation for nutrient recovery from dilute wastewater

Williams

Zitomer

Mayer

2015

Environ. Sci.: Water Res. Technol.

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Regulated phosphorus (P) and nitrogen (N) discharges and the cost of fertilizer provide economic drivers for nutrient removal and recovery from wastewater. This study used ion exchange (IX) in dilute (domestic) wastewater to concentrate nutrients with subsequent recovery by struvite precipitation. This is the first tertiary wastewater treatment study directly comparing P removal using a range of Fe, Cu, and Al-based media followed by clinoptilolite IX columns for N removal and precipitation using the combined regenerants. Phosphate removal prior to breakthrough was 0.5-2.0 g P Lmedia −1 , providing effluent concentrations <0.1 mg L −1 PO4-P and <0.2 mg L −1 NH4-N for ≥80 bed volumes. Dow-FeCu resin provided effective P removal, efficient neutral pH regeneration and 560 mg P L −1 in the regeneration eluate (≥100× concentration factor). Exchange capacity of clinoptilolite in column mode was 3.9-6.1 g N Lmedia −1 prior to breakthrough. Precipitation using the combined cation and anion regenerants resulted in a maximum of 74% P removal using Dow-FeCu. Precipitates contained impurities, including Al 3+ , Ca 2+ , and Fe. Overall, the IX-precipitation recovery process removed ≥98% P and 95% N and precipitates contained 13% P and 1.6% N. This sequential process can NOT THE PUBLISHED VERSION; this is the author's final, peer-reviewed manuscript. The published version may be accessed by following the link in the citation at the bottom of the page.

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REM NUT Ion Exchange Plus Struvite Precipitation Process

Cited by 53 publications

References 0 publications

Phosphorus recovery as struvite from farm, municipal and industrial waste: Feedstock suitability, methods and pre-treatments

Phosphorus recovery as struvite from farm, municipal and industrial waste: Feedstock suitability, methods and pre-treatments

Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge

Ion exchange-precipitation for nutrient recovery from dilute wastewater

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