厌氧氨氧化反应器的影响因素研究

【作者】 王璐；

【导师】 孙志忠；

【作者基本信息】 黑龙江大学 ， 化学工程， 2018， 硕士

【摘要】 水体环境的富营养化,致使水环境不断恶化,甚至影响了工业生产以及人类的生活健康安全。氮磷的高排放是引起水体富营养化的主要原因,控制以及削减水体中的氮元素迫在眉睫。因此,生物脱氮技术便有着重大的研究意义。厌氧氨氧化(anaerobic ammonia oxidation,Anammox)工艺是一种高效、经济的新型生物脱氮工艺。由于该工艺具有氮的去除率高、不需外加其他碳元素、无氧溶解氧、污泥产出率低等特点,受到了相关各界广泛关注。随着厌氧氨氧化研究的深入,厌氧氨氧化组合工艺也发展起来,广泛应用于高氨氮废水的脱氮处理。但是在实际应用过程中,受到接种物来源、基质自抑制、外源性毒物和工艺启动时间长等因素的影响,厌氧氨氧化反应器的启动比较困难。本课题研究对于厌氧氨氧化工艺UASB反应器的影响因素进行研究,采用厌氧污泥,以成功培养出厌氧氨氧化菌为标志。通过在不同温度、不同pH值、不同底物浓度下的批量实验研究,得到适宜的温度、pH值、浓度区间,并测试是否能够保证反应器稳定运行。在氨氮底物浓度为300 mgN/L、亚硝态氮底物浓度为400 mgN/L、温度控制在30-35℃之间、人工调节pH在7.5-8.0范围内,反应器可以稳定运行,并能得到氨氮97%的去除率,亚硝态氮96%的去除率。更多还原

【Abstract】 The eutrophication of the water environment leads to the deterioration of the water environment,and even affects the industrial production and human health and safety.The high emission of nitrogen and phosphorus is the main cause of eutrophication,so it is urgent to control and reduce nitrogen in water.Therefore,biological denitrification technology has great research significance.Anammox process is an efficient and economical new biological nitrogen removal process.Due to the high removal rate of nitrogen,no need to add other carbon elements,anaerobic dissolved oxygen,and low sludge production rate,the process has received extensive attention from relevant circles.With the development of anaerobic ammonia oxidation,the combination process of anaerobic ammonia oxidation has also developed and is widely used in high ammonia nitrogen waste-water.However,it is difficult to start the anaerobic ammonia oxidation reactor due to the influence of the source of inoculation,the self-inhibition of the matrix,the exogenous toxicants and the length of the process.In this study,the influencing factors of UASB reactor in anaerobic ammonia oxidation process were studied.The anaerobic sludge was used to successfully cultivate anaerobic ammonia oxidizing bacteria.Through batch experiments at different temperatures,different pH values and different substrate concentrations,the appropriate temperature,pH and concentration ranges were obtained,and whether the reactor could operate stably was tested.With the concentration of ammonia-nitrogen substrate 300 mgN/L,nitrite-nitrogen substrate 400 mgN/L,temperature controlled between 30-35 C,and manually adjusted pH in the range of 7.5-8.0,the reactor can run steadily,and the removal rate of ammonia-nitrogen 97% and nitrite-nitrogen 96% can be obtained.更多还原