南华大学学报（自然科学版）2025，Vol.39Issue(3)：1-9,9.DOI:10.19431/j.cnki.1673-0062.2025.03.001
去除回收高浓度氨氮废水中氨氮的磷酸铵镁法研究
Research on the Magnesium Ammonium Phosphate Method for Removing Ammonia Nitrogen from High-Concentration Ammonia Nitrogen Wastewater
摘要
Abstract
The magnesium ammonium phosphate precipitation method can efficiently remove ammonia nitrogen from wastewater and convert it into valuable compound fertilizers.To explore the applicability of this method for treating wastewater with different concentrations of ammonia nitrogen,this study systematically analyzed the effects of initial ammonia nitrogen concentration(500～20 000 mg/L),pH value(7～11),n(N)∶n(Mg)∶n(P)ratio,reaction time(5～50 min),settling time(5～50 min),and rota-tion speed(0～300 r/min)on the efficiency of ammonia nitrogen removal and the structure of the solid phase products.The research results indicate that when the n(N)∶n(Mg)∶n(P)ratio is 1∶1.2∶1,the magnesium ammonium phosphate precipitation method can convert 92.17%of the ammonia nitrogen(20 000 mg/L)in weakly alkaline(pH 9)water quality into magnesium ammonium phosphate precipitate within 20 minutes,and the process of ammonia nitrogen removal has a relatively high first-order kinetic rate constant(0.112 4～0.117 9 min-1).For the wastewater from the sodium bicarbonate process,the magnesium ammonium phosphate precipitation method can also convert 91.74%of the ammonia nitrogen(2 300 mg/L)in weakly alkaline(pH 9)water into magnesium ammonium phosphate,and it has a high economic benefit(8.20 yuan per ton of wastewater).关键词
高质量浓度氨氮废水/磷酸铵镁/去除率/氨氮去除动力学Key words
high-quality ammonia nitrogen wastewater/magnesium ammonium phosphate/removal rate/ammonia nitrogen removal kinetics分类
资源环境引用本文复制引用
滑熠龙,周臣龍..去除回收高浓度氨氮废水中氨氮的磷酸铵镁法研究[J].南华大学学报（自然科学版）,2025,39(3):1-9,9.基金项目
国家自然科学基金面上项目(12375311) （12375311）
