摘要
推导了单级曝气生物滤池处理生活污水的有机物和氨氮去除动力学模型．在水温20—22．5℃，HRT1．25h的运行条件下求得UBAF—A、UBAF—B、UBAF—C的有机物去除动力学常数K1值分别为1．5214，1．7422和1．6372．动力学常数解析结果表明，填料性质对曝气生物滤池的有机物降解去除有一定影响，碎石填料在有机物去除方面要优于陶粒填料，而小粒径填料的性能要好于大粒径填料．分析了曝气生物滤池同步去除氨氮的动力学特性，发现氨氪去除速率的沿程变化主要与亚硝化细菌的活性质量浓度分布有关，而后者主要受局部空间的底物质量浓度、溶解氧质量浓度和pH值条件有关，溶解氧质量浓度又受曝气量、反应器特性和有机物质量浓度控制．单级曝气生物滤池在有机物存在条件下的氨氮去除反应可以分为3个不同的动力学限速区域，具有不同的底物去除速率变化特征．
The kinetic models of organics and ammonia removal in a biological aerated filter （BAF） for domestic wastewater treatment were established. The kinetic constants kl of reactor UBAF - A, UBAF - B and UBAFC were 15214, 17422 and 16372 respectively under the operational conditions of temperature 20 - 225 ℃ and HRTI25h. The results showed that organic removal efficiency was affected by the filter media. The gravel media filter has a better performance than that of ceramic media, and the small size media filter has a better performance than the large one. The kinetic characteristics of ammonia removal in BAF were analyzed. The results demonstrated that the ammonia removal rate changed with the activity distribution of ammonia oxidizer in a single BAF, which was affected by stratum concentration, DO and pH value. The three parameters changed along the water flow and the nitrification rate to remove organics and ammonia changed in three different kinetic regions in the reactor dimension, that is DO, double matrices and substratum control. There were different characteristics of nitrification rate in the three kinetic regions.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2006年第2期203-207,共5页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目(59825106)
济南大学科技基金资助项目(Y0417)
