滤料高度对曝气生物滤池性能的影响
Effect of media heights on the performance of biological aerated filter.
作者信息
Hu Yong-you, Wang Li-li
机构信息
School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, China.
出版信息
J Environ Sci (China). 2005;17(2):281-4.
The optimum media height of carbon oxidation and nitrification in a down-flow biological aerated filter was determined, and the distribution of the heterotrophic and nitrifying populations through studying the changes of organic carbon contents and ammonia concentration at different media height was got. The results showed that as a down flow BAF with granular media, the active layer of nitrifiers was deeper than heterotrophs in BAF. And the optimum media height for the removal of SS, COD(Cr) and NH4+ -N was 40 cm, 60 cm and 80 cm respectively. The removal efficiency of SS, COD(Cr), and NH4+ -N was 79.1%, 63.9% and 96.4% respectively under the influent COD(Cr), and NH4+ -N of 122.1 mgCOD(Cr)/L and 14.84 mgNH4+ -N/L, the influent flux of 15.8 L/h, air to liquid ratio of 3:1.
确定了下流式曝气生物滤池中碳氧化和硝化的最佳滤料高度，并通过研究不同滤料高度下有机碳含量和氨浓度的变化，得出了异养菌和硝化菌种群的分布情况。结果表明，作为采用颗粒滤料的下流式曝气生物滤池，硝化菌的活性层比曝气生物滤池中的异养菌更深。去除SS、COD（Cr）和NH₄⁺-N的最佳滤料高度分别为40 cm、60 cm和80 cm。在进水COD（Cr）为122.1 mgCOD（Cr）/L、NH₄⁺-N为14.84 mgNH₄⁺-N/L、进水流量为15.8 L/h、气液比为3:1的条件下，SS、COD（Cr）和NH₄⁺-N的去除率分别为79.1%、63.9%和96.4%。
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