Study on MAP Precipitation Method using Lightly Burned Magnesium Powder as Magnesium Source to Remove Ammonia Nitrogen from Wastewater
Adding phosphorus and magnesium sources to ammonia nitrogen wastewater can form ammonium magnesium phosphate(MAP)precipitation.This experiment used lightly burned magnesium powder as the magnesium source for MAP method,and investigated the effects of factors such as the ratio of phosphorus and magnesium sources,reaction time,etc.on the ammonia nitrogen removal rate,and determined the optimal reaction conditions.The experimental results show that when the ratio of N,Mg,and P substances is 1:8:1(calculated as pure magnesium oxide)and the reaction time is 50 minutes,the ammonia nitrogen removal rate reaches 90%.
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