Pretreatment of High Strength Ammonia Removal from Rare-Earth Wastewater by Magnesium Ammonium Phosphate (MAP) Precipitation

Hao Wang; Guan Wen Cheng; Xiao Wei Song; Zai Han Xu; Jin Jie Meng; Chuan Qiang Dong

doi:10.4028/www.scientific.net/AMR.496.42

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 496Pretreatment of High Strength Ammonia Removal from...

Pretreatment of High Strength Ammonia Removal from Rare-Earth Wastewater by Magnesium Ammonium Phosphate (MAP) Precipitation

Abstract:

Ammonia is one of the most important contaminants affecting the quality of water environment. Magnesium ammonium phosphate (MgNH4PO4·6H2O), which is a slow releasing fertilizer, is one possible way to remove high strength ammonia from the wastewater. The wastewater is collected from the effluent of extraction of rare earth elements factory, the study investigate the influence of pH, magnesium and phosphate dosing molar ratio and reaction time for ammonia removal rate. The results show that: when the pH = 9.2, n (Mg): n (N): n (P) = 2.2:1:2, reaction time t = 20min, ammonia concentration of the wastewater from 4420mg / L down to 1440mg / L , ammonia nitrogen removal rate can reach 67%, the remaining TP = 0.9mg / L; higher Ca2 + concentration will affect the MAP precipitation for removing ammonia, but it help to reduce total phosphorus concentrations of effluent; it is not the longer reaction time the better removal rate, because the MAP-formation will destroy with longer reaction time.

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Periodical:

Advanced Materials Research (Volume 496)

Pages:

42-45

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.496.42

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Online since:

March 2012

Authors:

Hao Wang, Guan Wen Cheng, Xiao Wei Song, Zai Han Xu, Jin Jie Meng, Chuan Qiang Dong

Keywords:

High Strength Ammonia, MAP Precipitation, Pretreatment, Rare Earth Wastewater

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References

[1] Ryu H.D. Kim,D.,&Lee,S.-I. (2008). Application of struvite precipitation in treating ammonium nitrogen from semiconductor wastewater. Journal of hazardous materials, 156(1-3), 163-9.

DOI: 10.1016/j.jhazmat.2007.12.010

Google Scholar

[2] Zhang, T., Ding, L., & Ren, H. (2009). Pretreatment of ammonium removal from landfill leachate by chemical precipitation. Journal of hazardous materials, 166(2-3), 911-5.

DOI: 10.1016/j.jhazmat.2008.11.101

Google Scholar

[3] Huang, HM, Xiao, XM, & Yan, B. (2009). Recycle use of magnesium ammonium phosphate to remove ammonium nitrogen from rare-earth wastewater. Water science and technology : a journal of the International Association on Water Pollution Research, 59(6), 1093-9.

DOI: 10.2166/wst.2009.086

Google Scholar

[4] Nelson, NO, Mikkelsen, RL, & Hesterberg, DL (2003). Struvite precipitation in anaerobic swine lagoon liquid: effect of pH and Mg:P ratio and determination of rate constant. Bioresource Technology, 89(3), 229-236.

DOI: 10.1016/s0960-8524(03)00076-2

Google Scholar