Using a chemical equilibrium model to predict amendments required to precipitate phosphorus as struvite in liquid swine manure

Çelen, İpek; Buchanan, John R.; Burns, Robert T.; Robinson, Robert J.; Raman, D. Raj

doi:10.1016/j.watres.2007.01.018

Cited by 143 publications

(64 citation statements)

References 14 publications

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“…In the research, the thermodynamic modeling calculation of struvite crystallization with PHREEQC program was performed. The compiled programs were calculated with PHREEQC.DAT database and the thermodynamic solubility product of struvite log K sp = -13.15 (25ºC) was adopted [15]. PHREEQC modeling predictions were compared with experimental results at different struvite crystallization conditions.…”

Section: Phreeqc Modeling Calculationmentioning

confidence: 99%

Phosphate recovery from animal manure wastewater by struvite crystallization and CO₂ degasification reactor

Zhang

Fang

et al. 2014

Ecological Chemistry and Engineering S

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Abstract:The problem of phosphorus discharge is related to environmental protection and food security. Struvite crystallization is a useful technology for phosphate recovery from wastewater. In the research, struvite crystallization process with CO2 degasification continuous U-shape reactor (CUSR) was application for phosphate recovery from animal manure wastewater. The result indicated PO4 3--P recovery ratio could achieve 47-53% without magnesium addition when CUSR hydraulic retention time controlled at 60 min. With extra magnesium addition, PO4 3--P recovery ratio could significant achieve 80-86% at magnesium addition amount 57.5 mg/dm 3 . PHREEQC modeling predictions trend of struvite crystallization was close to CUSR experimental results. The modeling calculation can provide a theoretical guide for operational parameters design. For seeding technology, high phosphate recovery efficiency was obtained and preformed struvite was the most effective seeding material. Surface characterization analysis demonstrated the dominant composition of chemical solids was struvite. Water extraction analysis indicated chemical solids recovery from animal manure wastewater could release PO4 3--P slowly and be available as slow-release fertilizer.

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Section: Phreeqc Modeling Calculationmentioning

confidence: 99%

Phosphate recovery from animal manure wastewater by struvite crystallization and CO₂ degasification reactor

Zhang

Fang

et al. 2014

Ecological Chemistry and Engineering S

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“…Since the increase of these two pollutants can lead to problems with eutrophication of natural waters, their removal to a certain limit is usually obligatory (Ohlinger et al 1998;Battistoni et al 2002;Doyle and Parsons 2002;Basakcilardan-Kabakci et al 2007;Çelen et al 2007). As a chemical precipitation technology for ammonium nitrogen and phosphorus recovery, struvite (MAP, MgNH 4 PO 4 ·6H 2 O) precipitation shows many advantages taking into account the economic impact of increasing energy costs and limited natural nutrient resources (Ohlinger et al 1998;Battistoni et al 2000;Wilsenach et al 2007;Marti et al 2008;UludagDemirer 2008;Moerman et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Improving the prediction of ammonium nitrogen removal through struvite precipitation

Zhou

2011

Environ Sci Pollut Res

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“…Removal of phosphorus ranging from 55 to 98% in different experimental conditions has been reported using liquid swine manure 20 . Recovery efficiency of phosphorus between 80 and 90% was achieved in the treatment of sludge digester liquors 21 .…”

Section: Resultsmentioning

confidence: 99%

Production of struvite from beverage waste as phosphorus source

et al. 2012

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In this work was investigated the influence of pH on the synthesis of struvite using cola beverage waste as source of phosphorus. The process was operated in a batch reactor. The reaction time was 20 minutes, and the chemicals MgCl 2 .6H 2 O and NH 4 Cl were used in the experiment, with a molar ratio of Mg +2 :NH 4 + :PO 4 3-= 1:1:1. The products were characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), surface area (BET), thermogravimetric analysis (TGA) and infra-red (IR). From the results was verified the formation of a crystalline phase at pH 9.5, with a surface area of 6.59 m 2 g -1 and a particle size of about 0.25 µm.

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Using a chemical equilibrium model to predict amendments required to precipitate phosphorus as struvite in liquid swine manure

Cited by 143 publications

References 14 publications

Phosphate recovery from animal manure wastewater by struvite crystallization and CO₂ degasification reactor

Phosphate recovery from animal manure wastewater by struvite crystallization and CO₂ degasification reactor

Improving the prediction of ammonium nitrogen removal through struvite precipitation

Production of struvite from beverage waste as phosphorus source

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Using a chemical equilibrium model to predict amendments required to precipitate phosphorus as struvite in liquid swine manure

Cited by 143 publications

References 14 publications

Phosphate recovery from animal manure wastewater by struvite crystallization and CO2 degasification reactor

Phosphate recovery from animal manure wastewater by struvite crystallization and CO2 degasification reactor

Improving the prediction of ammonium nitrogen removal through struvite precipitation

Production of struvite from beverage waste as phosphorus source

Contact Info

Product

Resources

About

Phosphate recovery from animal manure wastewater by struvite crystallization and CO₂ degasification reactor

Phosphate recovery from animal manure wastewater by struvite crystallization and CO₂ degasification reactor