Study on operation characteristics and dynamics of upflow biological aerated filter

doi:10.16085/j.issn.1000-6613.2017-0655

Abstract

Abstract: The simulated methylene blue wastewater was treated continuously for a long-term time by using upflow biological aerated filter(UBAF)in this study. The conditions of the start-up and domestication were investigated and the changes of biomass with the filling height and the regularity of pollutants removal in UBAF were analyzed. Furthermore,the degradation dynamic model of organic substrate was established,which based on the performance analysis of substrate degradation under different hydraulic loads. The results showed that the removal rate of COD,ammonia nitrogen and chroma were 80.93%,73.81% and 56.79%,respectively. Rich microorganisms and biota were adhered on the surface of filling after the reactor was continuously domesticated for 43 days. When the reactor was stably operated under the optimal parameters,the film thickness,microbial biomass and linear degradation rate of pollutants decreased with increasing filling height. The removal of COD,ammonia nitrogen and chroma mainly concentrated in the packing height 35cm below. The kinetic model was determined by analyzing the COD of different height fillings and hydraulic loadings. The model parameters n and K₂of organic compound degradation kinetic were 0.2022 and 0.0406, respectively.

Key words: upflow biological aerated filter, waste water, biofilm, kinetics

摘要： 研究采用升流式曝气生物滤池（UBAF）处理亚甲基蓝模拟废水，进行了长期连续实验，考察了UBAF启动和挂膜情况，分析了曝气生物滤池池体内部生物量随填料高度的变化及沿程污染物去除规律，根据不同水力负荷下不同填料层高度有机底物降解效果，建立了有机底物降解动力学模型。结果表明：UBAF持续挂膜43天后，填料表面附着大量的微生物，生物相丰富，COD、NH₃-N和色度去除率分别为80.93%、73.81%和56.79%；在最佳工况下稳定运行，生物膜厚度、微生物量和沿程污染物降解速率均随填料高度增加而降低，COD、NH₃-N和色度的去除主要集中在填料高度35cm以下。通过分析不同水力负荷下不同填料高度COD的变化情况，得到有机底物降解动力学模型，动力学模型参数n和K₂分别为0.2022和0.0406。

关键词: 开流式曝气生物滤池, 废水, 生物膜, 动力学

CLC Number:

X703.1

JIA Yanping, JIANG Cheng, ZHANG Lanhe, ZHANG Haifeng, WANG Wei, CHEN Zicheng. Study on operation characteristics and dynamics of upflow biological aerated filter[J]. Chemical Industry and Engineering Progress, 2017, 36(10): 3897-3903.

贾艳萍, 姜成, 张兰河, 张海丰, 王嵬, 陈子成. 升流式曝气生物滤池运行特性及动力学[J]. 化工进展, 2017, 36(10): 3897-3903.

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