基于生物膜模型的脉冲生物滤池硝化效果模拟

针对脉冲生物滤池的硝化功能,依据物料衡算方程、Fick第一定律构建生物膜传质子模型以及简化的ASM3模型,建立生物膜反应子模型。以Matlab软件为平台编程,模拟在沿脉冲生物滤池水流方向上基质浓度,并依据实测值和参数灵敏度进行分步校正。实测和模拟结果均表明:COD、NH+4-N、NO-2-N的去除主要集中在脉冲生物滤池的中上部、中部、下部,COD和氨氮去除率分别为45%、50%。当改变有机负荷和布水周期时,氨氮去除率随有机负荷的增大而减小,随布水周期的增大而增大。

SIMULATION ON NITRIFICATION PERFORMANCE IN PULSE TRICKLING FILTER BASED ON BIOFILM MODEL

To reflect the nitrification performance in the pulse trickling filter，this paper built a biofilm reaction model based on the biological membrane diffusion model，which was based on the mass balance equation，the first Fick law，and the simplified ASM3 model． MATLAB was used to simulate the concentration along the pulse tricking filter，and the parameters were corrected by the measured values and sensitivity of values． The actual measurement data and the simulation result both indicated that the removal of COD，NH + 4 －N，NO － 2 －N，NO － 3 －N mainly concentrated in the middle-upper，middle，lower part and the removal rates of COD and ammonia nitrogen were 45% and 50% respectively． When the organic load and water cycle changed，the ammonia removal rate decreased with the organic load increasing and went up with the increasing of water cycle．