Study on the Treatment for High Concentration of Ammonia Nitrogen in Piggery Wastewater by MAP
Magnesium-ammonium-phosphate precipitation method (MAP) is a newly-developed technique to remove ammonia nitrogen from wastewater. In this study, MAP method has been studied by using MgCl2·6H2O and Na2HPO4·12H2O as precipitators for treating highly concentrated ammonia nitrogen wastewater. The effect of pH value, formulas of precipitation and precipitator ratio on MAP precipitation efficiency has been examined. A lab scale study is conducted to optimize the reaction conditions by single factor experimentation and cross experimentation. The experimental results indicates that the effluent ammonia nitrogen and removal rate reaches 36.66mg/L and 95.15％ respectively when pH is 9.5, the mole ratio n(PO4 3-)∶n(NH4 +)∶n(Mg2+) is controlled at 1∶1∶1.2 and the reaction time is controlled at 10 minutes.
magnesium-ammonium-phosphate ammonia nitrogen piggery wastewater
Yang Yang Lilong Yan Zhao Jiang Xue Han Luming Liu Ying Zhang
School of Resource & Environment,Northeast Agricultural University,Harbin 150030,China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）