磷酸铵镁沉淀预处理某制药高氨氮废水的研究  

Research on the Pre Treatment of a Pharmaceutical Plant High Ammonia Nitrogen Wastewater by Magnesium Ammonium Phosphate Precipitation

作　　者：戚永洁 胡静 汪照星 QI Yongjie;HU Jing;WANG Zhaoxing(Jiangsu Nanda-Huaxing Science and Technology of Environmental Protection Co.,Ltd.,Yancheng 224001,China;Chizhou Nanhuan Environmental Protection Co.,Ltd.,Chizhou 247100,China)

机构地区：[1]江苏南大华兴环保科技股份公司,江苏盐城224001 [2]池州南环环保科技有限公司,安徽池州247100

出　　处：《山东化工》2025年第3期283-285,共3页Shandong Chemical Industry

摘　　要：江苏省滨海县某制药企业在生产工艺产品的同时产生大量高氨氮废水,质量浓度高达1800 mg/L,在进入生化系统处理之前需要对废水的氨氮进行预处理。本研究以氨氮质量浓度为500~1500 mg/L的氨氮模拟配水来探讨磷酸铵镁沉淀单因素最优条件,确定最佳工艺条件为:进水质量浓度500 mg/L时,pH值=9,n(镁)∶n(磷)∶n(氮)为1.1∶1∶1,反应时间为40 min;进水质量浓度1000,1500 mg/L时,pH值=10,n(镁)∶n(磷)∶n(氮)为1.3∶1∶1,反应时间为40 min。正交实验所得,影响磷酸铵镁沉淀的反应因素依次为n(镁)∶n(磷)∶n(氮)、反应时间、初始pH值,最优反应水平为n(镁)∶n(磷)∶n(氮)为1.5∶1.1∶1,反应时间为40 min,初始pH值为11。模拟配水在正交实验所得最优工艺参数下,对实际废水的氨氮去除率达91.3%,剩余氨氮为(160±20)mg/L,减轻了后续生化系统的负荷。In Binhai County,Jiangsu Province,a pharmaceutical company produced a large amount of wastewater with high ammonia nitrogen concentration as high as 1800 mg/L while producing process products,which required pretreatment of ammonia nitrogen before entering the biochemical system for treatment.In this study,the optimal single-factor conditions were discussed by precipitation of ammonium magnesium phosphate with simulated water distribution of ammonia nitrogen with a concentration of 500~1500 mg/L.The optimal process conditions were determined as follows:influent concentration of 500 mg/L,pH value=9,n(magnesium)∶n(phosphorus)∶n(nitrogen)was 1.1∶1∶1,and reaction time was 40 min.When the influent concentration is 1000 mg/L and 1500 mg/L,the pH value is 10,the n(magnesium)∶n(phosphorus)∶n(nitrogen)is 1.3∶1∶1,and the reaction time is 40 min.According to the orthogonal experiment,the reaction factors affecting the precipitation of magnesium ammonium phosphate were successively n(magnesium)∶n(phosphorus)∶n(nitrogen),reaction time and initial pH value,and the optimal reaction level was as follows∶n(magnesium)∶n(phosphorus)∶n(nitrogen)of 1.5∶1.1∶1,reaction time of 40 minutes and initial pH value of 11.Under the optimal process parameters obtained from the orthogonal experiment,the removal rate of ammonia nitrogen from the actual wastewater reached 91.3%,and the remaining ammonia nitrogen was(160±20)mg/L,which reduced the load of the subsequent biochemical system.

关 键 词：磷酸铵镁 预处理 高氨氮废水 

分 类 号：X787[环境科学与工程—环境工程]