接种物对厌氧同步脱硫反硝化特性的影响实验研究
- 1. 西安建筑科技大学环境与市政工程学院，西安 710055
摘要: 分别以厌氧污泥、脱氮硫杆菌菌悬液和厌氧污泥并添加脱氮硫杆菌菌悬液为接种物，以硫化物和硝酸盐为进水基质，考察不同接种物条件下，各反应器的硫化物氧化特性、反硝化特性、生化反应机理及微生物特性。结果表明，在无菌条件下，硫化物不能被硝酸盐化学氧化。接种脱氮硫杆菌菌悬液的2#反应器的硫氧化速率为1.98 g S/(m3·h)，停留24 h硫化物的去除率高达97%，脱硫能力最强，该接种条件下以硝酸盐氧化硫化物为主反应，优势菌为杆菌，进水的NO-3-N/
Effect of inoculum on process of simultaneous desulfurization and denitrification
- 1. School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology,Xi’an 710055，China
- Received Date:
2009-06-22
Fund Project:
Abstract: In this experiment, three reactors were inoculated respectively with anaerobic sludge, pure culture of Thiobacillus denitrificans and mixture of anaerobic sludge with pure culture of Thiobacillus denitrificans under influent of sulfide and nitrate conditions. This study investigated the characteristics of sulphide oxidizing, denitrifying, mechanism of biological reaction, and microbiological characteristics under different inoculum conditions. The results showed that under aseptic conditions, chemical oxidation of the sulfide by nitrate is either nonexisting or occurring at a very low rate. Biological oxidation rates of sulfide is 1.98 g S/ (m3·h) in 2# reactor inoculated with pure culture of Thiobacillus denitrificans, and the removal efficiency of sulfide is 97% after 24 hours.Biological oxidation of the sulfide by nitrate was main mechanism in 2# reactor, in which short rods bacterium predominated, and highly sulfide removal was achieved at NO-3-N/S ratio of 0.4. Biological oxidation rates of sulfide was 1.78 g S/(m3·h) in 1# reactor inoculated with anaerobic sludge. Both of biological oxidation of the sulfide by nitrate and biological oxidation of the sulfur by nitrate are main mechanisms in 1# reactor, in which coccus bacterium predominated, and highly sulfide removal was achieved at NO-3-N/S ratio of 0.8. Biological oxidation rates of sulfide was 1.71 g S/(m3·h) in 3# reactor inoculated with mixture of anaerobic sludge with pure culture of Thiobacillus denitrificans. All of biological oxidation of the sulfide by nitrate, biological oxidation of the sulfur by nitrate and heterotrophic denitrification happened in 3# reactor, in which short rods and coccus bacterium predominated, and complete nitrate and sulfide removal was achieved at NO-3-N/S ratio of 1.2. In addition, the process can be applied for wastewater containing sulfide as well as wastewater containing nitrate with low C/N ratio.
点击查看大图
下载:
