小球藻光生物反应器的设计及其脱氮除磷的实验研究

发布时间：2018-10-26 06:35

【摘要】：目前,氮磷废水的环境污染已成为一个世界性的环境问题。近年来利用藻类生物技术处理污水受到社会广泛关注。本文利用自行设计制造的小球藻光生物反应器,对模拟氮磷废水进行处理,研究了温度、通气量等因素对光生物反应器脱氮除磷的影响,探索小球藻光生物反应器处理氮磷废水的最优条件。本文主要研究内容和成果如下:1、运用CFD仿真模拟和理论研究设计并制造了一种用于培养小球藻的气升式光生物反应器。基于Fluent仿真模拟的结果,确定该气升式光生物反应器的高径比为5,导流筒直径为96mm。2、研究了通气量及温度对小球藻气升式光生物反应器处理人工尿液脱氮除磷以及产氧的影响。结果表明:小球藻光生物反应器处理人工尿液的最优条件为温度25℃、通气量2L/min,在该条件下,TP去除率为79.26%,TN去除率为86.70%,COD去除率为71.72%。3、探讨了小球藻气升式光生物反应器对模拟城市污水脱氮除磷的处理效果。结果表明:在温度25℃、通气量2L/min时,TP去除率为98.65%,TN去除率为84.87%,COD去除率为85.06%。4、采用自制的平板式光生物反应器初步探讨了小球藻连续处理人工尿液和城市污水的效能。发现该反应器脱氮除磷以及COD去除效果良好,但不如气升式光生物反应器。
[Abstract]:At present, the environmental pollution of nitrogen and phosphorus wastewater has become a worldwide environmental problem. In recent years, the use of algal biotechnology to treat sewage has been widely concerned by the society. In this paper, the simulated nitrogen and phosphorus wastewater was treated by using the self-designed photobioreactor of Chlorella vulgaris. The effects of temperature, ventilation and other factors on denitrification and phosphorus removal in photobioreactor were studied. To explore the optimal conditions for the treatment of nitrogen and phosphorus wastewater by Chlorella vulgaris photobioreactor. The main contents and achievements of this paper are as follows: 1. An air-lift photobioreactor for the cultivation of Chlorella vulgaris was designed and manufactured by using CFD simulation and theoretical research. Based on the simulation results of Fluent, the height to diameter ratio of the air-lift photobioreactor is 5 and the diameter of the diversion tube is 96mm. 2. The effects of aeration rate and temperature on nitrogen and phosphorus removal and oxygen production in artificial urine treated by chlorella aero-lift photobioreactor were studied. The results showed that the optimal conditions for the treatment of artificial urine by Chlorella vulgaris photobioreactor were temperature 25 鈩，

本文编号：2294866