摘    要：我国随着工业化和城市化步伐的不断加快，目前水环境的污染与破坏是十分严峻的，这些废水中含有大量的SO32-、SO42-、Cl-、NO3-、以及Hg、Pb、Cr等重金属离子，该废水具有低碳源、高盐度和高硝态氮的特点，因此，生物反硝化技术开发和应用被提上了日程。其中亚硫酸盐反硝化技术是近期研究的热点。为了探究亚硫酸盐反硝化的影响，实验结果表明当进水量为2.5L/h，水力停留时间为12h，循环流量为39.1L/h反应器运行效果最佳，COD平均去除率达到78％。溶液中的亚硝酸盐对亚硫酸盐氧化有明显的促进作用。进水 pH 值为 7.5时,反硝化效果最好。溶解氧DO在反应器的回流液中是影响反硝化的脱氮的主要因素。所以要尽可能大量的减少溶液中所含有的溶解氧的含量。亚硫酸盐浓度过高的话反硝化的进行会受到抑制。

关键词：反硝化；亚硫酸盐；上流式厌氧污泥床;

Abstract：Along with the accelerating pace of industrialization and urbanization in our country, the current water environment pollution and destruction is very serious, the wastewater contains heavy metal ions such as SO32-, SO42-, Cl-, NO3-, Hg, Pb, Cr and so on. The wastewater has the characteristics of low carbon source, high salinity and high nitrate nitrogen. Therefore, the development and application of biological denitrification technology have been put on the agenda. Sulfite denitrification is a hot topic recently. To explore the influence of the sulfite denitrifying, the experimental results show that when the water inflow of 2.5 L/H, hydraulic retention time of 1.2 H, circulating flow rate of 39.1 L/H reactor running effect is best, the average COD removal rate reached 78%. The nitrite in solution has obvious catalytic effect on sulfite oxidation. When the pH value is 7.5, the anti-nitrification effect is the best. Dissolved oxygen in reflux is the main cause of denitrification. So you want to reduce the amount of dissolved oxygen in the solution as much as possible. Denitrification is inhibited when sulfite concentration is too high.

Key words：denitrification; sulfites; up-flow anaerobic sludgebed

目  录

1引言 1

1.1研究目的与意义 1

1.2国内外现状 1

1.2.1国外现状 1

1.2.2国内现状 1

1.3国内外研究现状 2

2实验材料与方案 3

2.1实验设备 3

2.2培养污泥 3

2.3反硝化污泥的性状 3

2.4实验用水 4

2.5实验方法 4

2.6测定方法和所用的仪器 5

3结果与分析 5

3.1流速对亚硫酸盐反硝化影响 5

3.1.1流速低的时候运行效果 5

3.1.2提高流速后的运行效果 6

3.1.3高流速运行效果 6

3.1.4满流速运行效果 6

3.2 pH值对亚硫酸盐反硝化的影响 6

3.2.1亚硫酸盐的还原及硫酸盐的生成 8

3.2.2 TOC的去除 8

3.3溶解氧DO对亚硫酸盐反硝化技术的影响 8