Phosphorus removal from a real anaerobic supernatant by struvite crystallization

Battistoni, P.; Angelis, Anna De; Pavan, Paolo; Prisciandaro, Marina; Cecchi, Fabiola

doi:10.1016/s0043-1354(00)00498-x

Cited by 120 publications

(42 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The K sp value for ACP was set at 26.83, the mean value of the K sp for ACP from all the studies described by Mañas et al [28]. The Ksp for brucite was set at 17.01 according to the study of Altmaier et al [29].Several minerals were removed from the database as they cannot precipitate through the conditions of the runs: the monetite (CaHPO 4 ), the magnesite (MgCO 3 ), the aragonite (CaCO 3 ), the dolomite (CaMg(CO 3 ) 2 , the huntite (Mg 3 Ca(CO 3 ) 4 ), the ␤-tricalciumphosphate (Ca 3 (PO 4 ) 2 ) as they can only form at high temperature [30,31] [7,12,32,33]. The SI values were calculated using the initial concentrations.…”

Section: Determination Of the Final Solid Phases By Phreeqc®mentioning

confidence: 99%

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

View full text Add to dashboard Cite

-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.

show abstract

Section: Determination Of the Final Solid Phases By Phreeqc®mentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…Alternative phosphate removal methods like crystallization (Battistoni et al, 2001), magnetic separation (Karapinar et al, 2004), sorption (Westholm, 2006), and ion exchange (Kofinas and Kioussis, 2003), to reach low phosphate level have been proposed. However, until now none have found large-scale application for ecological sensitive waters, because of their limited specificity toward phosphate over hydroxides or other oxoanions like carbonate.…”

Section: Introductionmentioning

confidence: 99%

Development of a bionanotechnological phosphate removal system with thermostable ferritin

Jacobs

Hasan

Paik

et al. 2010

Biotech & Bioengineering

View full text Add to dashboard Cite

Phosphate removal to ecologically desired levels of <0.01 mg/L is currently dependent on large overdosing of metal salts and production of large amounts of chemical sludge. The present study focuses on the development and performance of a new bionanotechnological phosphate removal system, based on sorption of oxoanions by nanoscale ferric iron particles stabilized within thermostable ferritin from the hyperthermophilic archaeon Pyrococcus furiosus (PfFrt). Laboratory studies show that this thermostable protein nanocage has fast kinetics for phosphate uptake at very low concentrations by catalytic oxidation of iron. In this study we demonstrate essentially complete phosphate removal with a capacity of approximately 11 mg/g PfFrt. Ferritin can easily be immobilized and is amenable to fast and efficient regeneration, making recovery of phosphate possible. The phosphate removal process with PfFrt is, due to its high affinity, able to reach ecologically desired phosphate levels and in addition it is cost competitive with existing techniques.

show abstract

“…High phosphorus and ammonia removal level were achieved at increased pH [14] [15]. NaOH is generally used for pH adjustment, but its addition rapidly increases pH value.…”

Section: Introductionmentioning

confidence: 99%

pH Control during the Struvite Precipitation Process of Wastewaters

Radev¹,

Peeva²,

Nenov³

2015

JWARP

View full text Add to dashboard Cite

The high concentration of phosphorus and nitrogen in wastewater and sludge could be lowered to a certain level by struvite (MgNH4PO4•6H2O) crystallization. One of the main factors for struvite formation is the solution pH. It can be adjusted by non-reagent carbon (CO2) dioxide stripping through the process of aeration. The intensity of the mass transfer between the air and the supernatant of dewatering sludge obtained from wastewater treatment plant is characterized by the volumetric liquid-side mass transfer coefficient, which can be estimated theoretically. It is found that the rate of pH increase depends strongly on the sparging area of the air distribution system while the air flow rate does not influence considerably the Dissolved Oxygen (DO) level which governs the CO2 stripping process. The theoretical calculated values of the volumetric mass transfer coefficient have been compared with those obtained experimentally. Based on the data obtained, relationships of pH/kLa (mass transfer coefficient) were developed. These correlations serve as a tool for prediction of pH during the struvite precipitation process.

show abstract

Phosphorus removal from a real anaerobic supernatant by struvite crystallization

Cited by 120 publications

References 16 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

Development of a bionanotechnological phosphate removal system with thermostable ferritin

pH Control during the Struvite Precipitation Process of Wastewaters

Contact Info

Product

Resources

About