作　　者： ; ; ; ; ; (佐藤久）; (福士宪一）;

机构地区： 西安建筑科技大学环境与市政工程学院

出　　处： 《中国给水排水》 2005年第9期10-13,共4页

摘　　要： 利用好氧生物转盘进行了生物膜脱氨的试验,测定了生物膜内硫酸盐还原与硝酸盐还原及DO之间的关系。结果表明:在进水NH4+-N为40 mg/L、HRT为5.49 h时,氨氧化率>85%;采用分段进水,合理利用碳源,有利于自养菌繁殖,从而促进硝化作用;由于受水力冲刷等作用的影响,在生物膜内DO扩散深度可达350μm左右(大于在污泥基团的扩散深度),只有在低DO的层面上才出现NO3--N的反硝化;在含有NO3--N的系统内,生物膜内硫酸盐还原作用减弱,表明硫酸盐还原与反硝化是相互影响的,这一结果对富含硫酸盐的有机废水生物脱氮处理有一定的参考价值。 In the experiment, aerobic rotating biological contactor was used for ammonia removal, and the relationship among sulfate reduction, nitrate reduction, and dissolved oxygen in biofilm was measured. The result shows that when influent NH4^＋ - N is 40 mg/L, HRT is 5.49 h, ammonia oxidation rate is more than 85%. Step feed and reasonable utilization of carbon source will be beneficial to the reproduction of autotrophic bacterium, and thus promoting the nitrification. Due to the water washing, diffusion depth of DO in biofilm can reach about 350 μm, which is greater than that of activated sludge mass. Only in the region of low DO, denitrification of NO3^-- N occurs. In the system where NO3^- - N exists, sulfate reduction in biofilm is decreased; it shows that sulfate reduction and denitrification interact on each other. This finding is of value for reference in biological nitrogen removal from organic wastewater which is rich in sulfate.

关 键 词： 生物膜 氨氧化 硫酸盐还原 反硝化

领　　域： [环境科学与工程]