Nutrients removal and recovery by crystallization of magnesium ammonium phosphate from synthetic swine wastewater

Song, Yonghui; Yuan, Peng; Zheng, Binghui; Peng, Jianfeng; Yuan, Fang; Gao, Ying

doi:10.1016/j.chemosphere.2007.06.001

Cited by 150 publications

(74 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Song et al (2007) pointed out the fact that the residual phosphate increased at a higher pH was due to the formation of Mg (OH) 2 that reduced the Mg 2+ availability for MAP crystallization; in addition, phosphate could not be removed by MAP crystallization any more due to the conversion of NH 4 + into free NH 3 . The effect of pH, N/P, and Mg/P molar ratios on struvite precipitation can be observed with a single parameter SI that includes all these effects.…”

Section: Speciation In Solid Phasesmentioning

confidence: 96%

Improving the prediction of ammonium nitrogen removal through struvite precipitation

Zhou

2011

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

Section: Speciation In Solid Phasesmentioning

confidence: 96%

Improving the prediction of ammonium nitrogen removal through struvite precipitation

Zhou

2011

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…In many cases, particularly those where animal and agricultural waste is the main source of N and P, Mg must be supplemented into the system to promote crystallization. In recent years, struvite recovery has been implemented in the treatment of a variety of wastewater sources, including landfill leachate [85], anaerobic digester effluent [86], as well as swine [87,88], poultry [89], and fertilizer wastewater [90•]. In all cases, after the introduction of Mg, struvite recovery was shown to be between 85 and 97 %.…”

Section: Chemical Precipitationmentioning

confidence: 99%

Nitrogen and Phosphorus Recovery from Wastewater

2015

View full text Add to dashboard Cite

Use of nitrogen-and phosphorus-based synthetic fertilizers shows an increasing trend, but this has led to largescale influx of reactive nitrogen in the environment, with serious implications on human health and the environment. On the other hand, phosphorus, a non-renewable resource, faces a serious risk of depletion. Therefore, recovery and reuse of nitrogen and phosphorus is highly desirable. For nitrogen recovery, an ion exchange/adsorption-based process provides concentrated streams of reactive nitrogen. Bioelectrochemical systems efficiently and effectively recover nitrogen as NH 3 (g) or (NH 4 ) 2 SO 4 . Air stripping of ammonia from anaerobic digestate has been reported to recover 70-92 % of nitrogen. Membrane separation provides recovery in the order of 99-100 % with no secondary pollutant in the permeate.With regard to phosphorus (P) removal, physical filtration and membrane processes have the potential to reduce suspended P to trace amounts but provide minimal dissolved P removal. Chemical precipitation can remove 80-99 % P in wastewater streams and recover it in the form of fertilizer (struvite). Acid hydrolysis can convert recovered P into usable phosphoric acid and phosphate fertilizers. Physical-chemical adsorption and ion exchange media can reduce P to trace or non-detect concentrations, with minimal waste production and high reusability. Biological assimilation through constructed wetlands removes both N (83-87 %) and P (70-85 %) from wastewaters, with recovery in the form of fish/animal feeds and biofuel. The paper discusses methods and important results on recovery of nitrogen and phosphorus from wastewater.

show abstract

“…Several authors have been reported that the formation of crystalline struvite is verified in a narrow range of pH, which is closely related to the raw material characteristics. By example, for struvite precipitation using swine wastewater as raw material, different values of pH such as 8.0-8.5 (22) , 8.5 (23) , 9.0 (8) , 8.9-9.25 (24) , 9.5-10.5 (25) were reported. The narrow range of pH for synthesis of crystalline struvite is because maintaining the pH above the optimum point occurs the formation of Mg 3 (PO 4 ) 2 instead of struvite, whereas at pH below the optimum range promotes the increase of H + in the solution inhibiting the struvite crystallization 22 .…”

Section: Resultsmentioning

confidence: 99%

Production of struvite from beverage waste as phosphorus source

et al. 2012

View full text Add to dashboard Cite

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.

show abstract

Nutrients removal and recovery by crystallization of magnesium ammonium phosphate from synthetic swine wastewater

Cited by 150 publications

References 10 publications

Improving the prediction of ammonium nitrogen removal through struvite precipitation

Improving the prediction of ammonium nitrogen removal through struvite precipitation

Nitrogen and Phosphorus Recovery from Wastewater

Production of struvite from beverage waste as phosphorus source

Contact Info

Product

Resources

About