每升300mg制药废水化学除氮技术研究

摘要：针对氨氮浓度约为300mg/L的制药废水，选用鸟粪石沉淀法进行脱氮，反应迅速、所需时间短、氨氮去除率高、污泥体积小；反应产物是鸟粪石，可作资源化利用。本文主要研究制药废水中pH、投加物料的摩尔比、反应时间、温度、进水氨氮浓度对氨氮去除率的影响。实验结果表明，当pH为12，氨氮、镁离子、磷酸氢根三者的摩尔比为1:1.2:1，温度为30℃的条件下，只需进行30min，出水氨氮浓度可减少至42mg/L，氨氮去除率高达87%；若将氯化镁和氧化镁联用，氯化镁与氧化镁的比值为1:1.3可达到相同的处理效果，且可以节约费用。反应生成的鸟粪石可作为一种缓释肥使用，经济效益好。42338

毕业论文关键词：制药废水；氨氮；鸟粪石

Study on the technology of chemical nitrogen removal from pharmaceutical wastewater

The pharmaceutical wastewater whose ammonia concentration is about 300mg/L could be solved by struvite precipitation method of removing nitrogen, with the advantages of fast reaction time, high ammonia nitrogen removal efficiency, smaller volume of sludge and so on. At the same time, the reaction formation of struvite stone has good economic benefits since Can make use of resources.This paper mainly studies the influential factors of the pharmaceutical wastewater pH, adding material molar ratio, reaction time, temperature, influent ammonia concentration on the removal rate of ammonia nitrogen. Experimental results show that when the pH value is 12, ammonia nitrogen, magnesium, phosphate molar ratio for 1:1.2:1, effluent ammonia Concentration is about 42mg/L and ammonia removal rate is as high as 87% after 30min reaction in the condition of 30℃.This method can be used as a pretreatment method of pharmaceutical wastewater to create conditions for the subsequent biochemical treatment. If the combined use of magnesium chloride and magnesium oxide, the ratio of magnesium chloride and magnesium oxide to 1:1.3 can achieve the same effect, and can save cost. Formed by the reaction of struvite stone as a slow-release fertilizer use and economic benefits.

Keywords: Pharmaceutical wastewater; Ammonia nitrogen ;Struvite

1绪论 1

1.1 研究背景 1

1.2 研究的内容与意义 2

2 制药废水的处理技术进展 4

2.1 物化法 4

2.1.1 混凝沉淀法 4

2.1.2 气浮法 4

2.1.3 吸附法 5

2.1.4 氨吹脱法 5

2.1.5 离子交换法 5

2.1.6 膜分离法 5

2.2 生化法 6

2.2.1 好氧生物处理工艺研究进展 6

2.2.2 厌氧生物处理工艺研究进展 7

2.3 化学法 7

2.3.1 电解法 7

2.3.2 铁炭法 8

2.3.3 Fenton 试剂法 8

2.3.4 高级氧化法 8

2.3.5 鸟粪石沉淀法（即MAP法） 8

2.4 方法论证 9

3 实验部分 12

3.1 实验原理 12

3.1.1 鸟粪石沉淀的形成机理 12 每升300mg制药废水化学除氮技术研究:http://www.751com.cn/yixue/lunwen_42746.html