Synthesis of struvite by ion exchange isothermal supersaturation technique

Mijangos, Federico; Kamel, Mahmoud M.; Lesmes, G; Muraviev, Dmitri

doi:10.1016/j.reactfunctpolym.2004.02.019

Cited by 81 publications

(42 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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%

See 1 more Smart Citation

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

et al. 2016

View full text Add to dashboard Cite

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.

show abstract

Section: Ion Exchange Methodsmentioning

confidence: 99%

“…Conventional ion exchange has been further modified by the use of ion exchange isothermal supersaturation (Mijangos et al, 2004;Ortueta, 2014). The principle is to facilitate concentration of the precipitating solution beyond its solubility level at a given temperature and enabling spontaneous crystallization of struvite.…”

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

View full text Add to dashboard Cite

show abstract

“…3,4 Phosphate salt (KH 2 PO 4 ) was also added as a supplement to the water-soluble phosphate already present in poultry manure, as a further aid to form struvite. A control treatment was also included for comparison.…”

Section: Materials and Methods Substrate Characterization And Recipe mentioning

confidence: 99%

Reducing ammonia emission from poultry manure composting via struvite formation

Zhang

Lau

2007

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Composting can provide a viable alternative for poultry manure management in the Fraser Valley of British Columbia, Canada. However, it has a high potential for ammonia emission because of the high nitrogen content of poultry litter. The objective of this study was to reduce ammonia emission by precipitating ammonia into struvite before it can volatilize from the composting matrix. Nitrogen transformation occurs during composting, but struvite formation can help to conserve nitrogen, and does not allow a large amount of nitrogen to be released into the environment as ammonia or nitrate, because ammonium-nitrogen becomes bound in struvite. It would also be possible to remove phosphorus from the manure. A laboratory-scale experiment was conducted to examine the feasibility of struvite formation during poultry manure composting. Magnesium and phosphate salts were supplemented to create favorable conditions to form struvite. Results indicated that ammonia emission was reduced by 40% to 84%, while the nitrogen retention in compost was enhanced. The struvite formed in compost was confirmed by means of X-ray diffraction; and scanning electron microscopy with energy dispersive X-ray spectroscopy.

show abstract

“…Newberyite consists of phosphate tetrahedrals attached with an acidic hydrogen atom as well as magnesium octahedrals attached with three water and three oxygen atoms belonging to three different phosphate groups (Boistelle and Abbona, 1981). It crystallizes significantly only at pH of approximately 6 and in high concentrations of magnesium and phosphate, whereas struvite can crystallize over a wide pH range of 7-11 (Mijangos et al, 2004). The solubility of struvite was significantly affected by pH.…”

Section: Struvite Decomposition Mechanismmentioning

confidence: 99%