摘要随着当今世界工业科技的进步与发展，大气的污染问题原来越被人们所关注。传统的燃煤电厂和燃煤锅炉排放的主要污染物有SO2、NOX、SO3、CO等，其中SO2和NOX的处理方法多采用湿法吸收。主要过程是使SO2和NOx通过吸收塔的吸收，吸收液经循环使用后外排，从而达到脱硫脱氮的目的，但同时也产生烟气脱硫脱硝废水，废水中含有200mg/L～400mg/L硝态氮。硝态氮排放到环境中可以引起河流的富营养化，所以废水需要经过处理后才能排放。处理废水通常所用的技术通常有A/O法和生物反硝化等等。本课题主要研究A/O法处理湿法烟气脱硫脱硝废水的应用和上述方法所产生的废水反硝化过程在UASB反应器中的工艺优化。44131

本文通过实验研究了在不同盐质量浓度、碳氮比和HRT条件下，含硝态氮废水的反硝化过程中碳源加入、TN、NO3-N和NO2-N的变化规律。分析结果表明：废水反硝化过程在UASB反应器中经过驯化后可以适应氯离子质量浓度为0-20g/L的盐质量浓度环境。脱氮性能随着HRT增加和进水C/N增加而提高。NO2-N积累也随着HRT增加和进水C/N增加而降低。经过反应条件的优化，较适宜的条件为进水C/N为3:1，HRT=7.08h。

Abstract With the advancement and development of industrial technology in today's world, pollution of the atmosphere had been more attention. The traditional coal-fired power plants and major pollutants emissions from coal-fired boilers have SO2, NOX, SO3, CO, etc., where SO2 and NOX approach more wet absorption . The main process is to make the SO2 and NOx absorber through the absorption of fluid absorbed by recycling efflux, so as to achieve the purpose of desulfurization and denitrification, but also produce flue gas desulphurization and denitrification of wastewater, wastewater containing 200mg / L ~ 400mg / L nitrate. Nitrate emissions into the environment can cause eutrophication of rivers, so need to be treated before the wastewater discharge. Wastewater treatment commonly used techniques usually have A / O biological denitrification method and so on. The main research topics of A / O processing of wet flue gas desulfurization and denitrification of wastewater applications and the above methods of wastewater generated by the process of denitrification process optimization in the UASB reactor.

This paper studied the rule of denitrification process in the UASB reactor under conditions, such as, salt concentrations, carbon nitrogen ratio and HRT. The rule of denitrification process contain carbon source, NO3-N and NO2-N. The results show that salt acclimated activated sludge is able to adjust to the circumstances with the concentration of chloride ion between 0-20g/L. nitrogen removal could rise with the increasing of carbon and nitrogen ratio or HRT. However, NO2-N accumulation rate is the direct opposite of nitrogen removal. The optimization conditions are C/N= 3:1 and HRT =7.08h.

毕业论文关键词：A/O生化处理；废水反硝化 ；UASB反应器； 硝态氮去除率 ； 亚硝态氮积累率

Keyword: A / O biological treatment； wastewater denitration； UASB reactor；removal rate of NO3-N ；NO2-N accumulation rate

目    录

摘要  2

Abstract  2

1  项目背景  4

2  研究方法及措施 4

   2.1 A/O法处理湿法烟气脱硫脱硝废水的应用 4

   2.2废水反硝化过程在UASB反应器中的工艺优化。5

2.2.1颗粒污泥5

2.2.2水样5

2.2.3实验装置  5

2.2.4盐浓度对反硝化过程在UASB反应器中的影响6

      2.2.5碳氮比对反硝化过程在UASB反应器中的影响6

      2.2.6 HRT对反硝化过程在UASB反应器中的影响6

3  结果与讨论   7