Study on Removing Ammonium Nitrogen from Wastewater Using Magnesium Hydroxide

Abstract:

Magnesium ammonium phosphate (MAP) precipitation has been studied by using magnesium hydroxide and sodium dihydrogen phosphate as precipitators for treating simulation wastewater in which the concentration of ammonia nitrogen is 10.00g/L. The effect of reaction time, pH and precipitator ratio on ammonium nitrogen removal rate has been investigated. The obtained optimum treatment conditions of MAP precipitation for treating ammonia nitrogen wastewater are as follows: reaction time is 4 hours, pH is 8.0, the molar ratio of sodium dihydrogen phosphate and ammonia nitrogen in wastewater, i.e. n (P):n (N), is 1.2, the molar ratio of magnesium hydroxide and sodium dihydrogen phosphate, i.e. n (Mg):n (P), is 1.4. Under these conditions, the ammonium nitrogen removal rate, by using MAP precipitation for treating simulation ammonia nitrogen wastewater, is 90.71%.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 2550-2553
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.2550
• Online since: June 2014
• Authors: Yu Qi Wang, Qi Zhang, Luo Feng Liu, Bi Jun Luo, Dan Wu, Ping Huang Xi
• Keywords: Ammonium Nitrogen, Magnesium Ammonium Phosphate, Magnesium Hydroxide

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