Extraction of Soluble Phosphorus From Swine Wastewater

Vanotti, Matías B.; Szögi, Ariel A.; Hunt, P. G.

doi:10.13031/2013.15637

Cited by 55 publications

(51 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…> F for %PO4-P as struvite Adjusted R the N:P molar ratio and the nucleation rate of struvite was speeded up (1). Secondly, NH 4 + improves the buffer capacity of the solution [18,35,36]. The nucleation of struvite occurs at a lower pH than the one needed for the precipitation of calcium phosphate [13].…”

Section: Process Parametersmentioning

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

132

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: Process Parametersmentioning

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

132

View full text Add to dashboard Cite

show abstract

“…In addition, a wide range of metal ions will be precipitated as insoluble salts such as copper and zinc carbonates. The main drawback of raising the pH (i.e., the substantial increase of ammonia volatilisation) is avoided if the manure has been pre-treated biologically to remove nitrogen as di-nitrogen gas (Vanotti et al, 2003).…”

Section: Phosphorous and Heavy Metalsmentioning

confidence: 99%

The potential contribution of separation technologies to the management of livestock manure

Burton¹

2007

Livestock Science

134

View full text Add to dashboard Cite

“…[12] As part of a project to demonstrate a new technology to replace treatment lagoons, one of the three production units was retrofitted with a waste management system that combined solid-liquid separation with removal of nitrogen and phosphorus from the liquid phase. [13,14] The liquid phase of the waste stream was recycled to clean the production facilities and/or used for crop irrigation. The solid phase of the waste stream was transported off-farm for compost stabilization.…”

Section: Sample Collection Sitesmentioning

confidence: 99%

Free Fatty Acids and Sterols in Swine Manure

Loughrin

Szögi²

2006

J. of Env. Sc. & Hlth., Part B

View full text Add to dashboard Cite

Free fatty acids and sterols were assessed in fresh manure and anaerobic lagoon sludge from swine production facilities in North Carolina. Eight free fatty acids and five sterols were identified and quantified in both manure and sludge samples. Compound identification was performed by gas chromatography/mass spectroscopy (GC-MS), and compound quantities were determined by gas chromatography after solid phase extraction with a 50:50 mixture of diethyl ether and hexane. The free fatty acids occurring in greatest abundance in both fresh manure and lagoon sludge were palmitic, oleic, and stearic. Free fatty acid content in fresh manure ranged from approximately 3 microg g(-1) dry weight (dw) to over 45 microg g(-1) dw. In lagoon sludge, free fatty acid content ranged from about 0.8 microg g(-1) dw to nearly 4 microg g(-1) dw. Coprostanol and epicoprostanol were the sterols in largest concentrations in fresh manure and lagoon sludge samples. Total sterol content ranged from approximately 0.5 microg g(-1) dw to around 11 microg g(-1) dw in fresh manure and from 3.5 microg g(-1) dw to almost 9 microg g(-1) dw in lagoon sludge. Fresh manure and lagoon sludge both had high levels of inorganic cations (e.g., Ca, Mg, Fe) capable of binding free fatty acids and forming insoluble complexes, thereby potentially reducing fatty acid biodegradation. In anaerobic lagoons, sterols are an organic fraction of sludge that are resistant to bacterial degradation. In the case of fresh manure, fatty acids could represent a potential source of energy via the manufacture of biodiesel fuel, if efficient means for their extraction and transesterification can be devised.

show abstract

Extraction of Soluble Phosphorus From Swine Wastewater

Abstract: ABSTRACT. Manure phosphorus (P)

Cited by 55 publications

References 17 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

The potential contribution of separation technologies to the management of livestock manure

Free Fatty Acids and Sterols in Swine Manure

Contact Info

Product

Resources

About