Technical and economical assessment of formic acid to recycle phosphorus from pig slurry by a combined acidification–precipitation process

Daumer, Marie‐Line; Picard, S.; Saint-Cast, Patricia; Dabert, Patrick

doi:10.1016/j.jhazmat.2010.04.039

Cited by 30 publications

(22 citation statements)

References 15 publications

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“…The precipitation rate was evaluated by monitoring the dissolved concentrations of Ca 2+ , PO 4 3− , Mg 2+ and NH 4 + .…”

Section: Discussionmentioning

confidence: 99%

“…The addition of a variable amount of NH 4 Cl powder (99%, Carlo Erba) was performed 5 min before the beginning of each run to minimize the possible volatilization of NH 3 . The addition was performed under high stirring.…”

Section: Synthetic Swine Wastewater Preparationmentioning

confidence: 99%

“…The studied responses were: ionic concentrations (Ca 2+ , PO 4 3− and NH 4 + ) after 24 h, the production of particles >100 m and the proportion of struvite versus calcium phosphate in dried solids.…”

Section: Experimental Designmentioning

confidence: 99%

“…Less reactant is needed when buffer effect is decreased by previously treating the effluent for nitrogen removal. The next two steps are: the precipitation of struvite crystals (MgNH 4 PO 4 ·6H 2 O) by adding a crystallization reagent (magnesia, MgO) and the filtration of struvite crystals in filter bags with a 100 m cut-off [4].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of struvite precipitation in synthetic biologically treated swine wastewater—Determination of the optimal process parameters

Capdevielle

Sýkorová

Biscans

et al. 2013

Journal of Hazardous Materials

140

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-Line Daumer. Optimization of struvite precipitation in synthetic biologically treated swine wastewater -Determination of the optimal process parameters. Journal of Hazardous Materials, Elsevier, 2013Elsevier, , vol. 244-245, pp. 357-369. <10.1016Elsevier, /j.jhazmat.2012 h i g h l i g h t sStruvite precipitation is mainly influenced by the quantity of MgO added. Optimized parameters favoured struvite formation despite of high [Ca 2+ ] without adding other reagents. 90% of the total dissolved phosphorus is recovered as large crystals of struvite. Raman spectroscopy and solid dissolution show co-precipitation of ACP and presence of CaCO 3 in solid.Keywords: Struvite P-recovery MgO Calcium phosphate Swine wastewater Raman a b s t r a c t A sustainable way to recover phosphorus (P) in swine wastewater involves a preliminary step of P dissolution followed by the separation of particulate organic matter. The next two steps are firstly the precipitation of struvite crystals done by adding a crystallization reagent (magnesia) and secondly the filtration of the crystals. A design of experiments with five process parameters was set up to optimize the size of the struvite crystals in a synthetic swine wastewater. More than 90% of P was recovered as large crystals of struvite in optimal conditions which were: low Mg:Ca ratio (2.25:1), the leading parameter, high N:P ratio (3:1), moderate stirring rate (between 45 and 90 rpm) and low temperature (below 20• C).These results were obtained despite the presence of a large amount of calcium and using a cheap reactant (MgO). The composition of the precipitates was identified by Raman analysis and solid dissolution. Results showed that amorphous calcium phosphate (ACP) co-precipitated with struvite and that carbonates were incorporated with solid fractions.

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“…The precipitation rate was evaluated by monitoring the dissolved concentrations of Ca 2+ , PO 4 3− , Mg 2+ and NH 4 + .…”

Section: Discussionmentioning

confidence: 99%

Section: Synthetic Swine Wastewater Preparationmentioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of struvite precipitation in synthetic biologically treated swine wastewater—Determination of the optimal process parameters

Capdevielle

Sýkorová

Biscans

et al. 2013

Journal of Hazardous Materials

140

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“…It is generally acknowledged that materials that contain high content of metal oxides can reduce the mobility of heavy metals, phosphorus and arsenic by two ways: adsorption and precipitation (Apak et al 1998;Enzo et al 2002;Daumer et al 2010;Li et al 2009). Generally, adsorption is accomplished by the surface complexation between pollutant and the hydroxyl groups on the oxide surface (Eqs.…”

Section: Discussion Of the Immobilization Mechanismmentioning

confidence: 99%

Immobilization of phosphorus, copper, zinc and arsenic in swine manure by activated red mud

2013

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Red mud (RM), the solid waste of alumina industry, is high in silicon, calcium, aluminum and iron oxides. In this study, RM was activated by heat treatment at different temperatures and characterized with BET nitrogen gas sorption, scanning electron microscopy analysis and X-ray diffraction analysis. Immobilization of phosphorus, copper, zinc, and arsenic in swine manure by activated RM was studied as a function of RM dosage, pH and time. The immobilization efficiency of phosphorus, copper, zinc and arsenic increased with the increase in RM dosage, reaching 77, 39, 42, and 78 % when the proportion of RM to swine manure was 20 %. The pH of the solution had a significant impact on the immobilization and it was found that the efficiency increased with the increase in pH. During the 24-h immobilization, the efficiency increased with time and achieved equilibrium after 12 h. Chemical variations of phosphorus, copper, zinc, and arsenic during the immobilization process were investigated with sequential chemical extraction method and the results showed that the contents of non-labile fractions of phosphorus, heavy metals and arsenic increased obviously, whereas the contents of labile fractions decreased.

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Bioconversion and Biorefineries: Recent Advances and Applications

Álvarez

González-Arias

Arenas

et al. 2020

Biofuel and Biorefinery Technologies

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Technical and economical assessment of formic acid to recycle phosphorus from pig slurry by a combined acidification–precipitation process

Cited by 30 publications

References 15 publications

Optimization of struvite precipitation in synthetic biologically treated swine wastewater—Determination of the optimal process parameters

Optimization of struvite precipitation in synthetic biologically treated swine wastewater—Determination of the optimal process parameters

Immobilization of phosphorus, copper, zinc and arsenic in swine manure by activated red mud

Bioconversion and Biorefineries: Recent Advances and Applications

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