基于微生物相互作用机理的完全耦合活性污泥模型研究

Study on full coupled activated sludge model (FCASM) based on coupling interaction mechanism of microorganisms

根据微生物生长机理,推导出微生物的耦合作用机理并在该机理的基础上改进了ASM3Bio-P模型.假设活性污泥系统中有机物氧化过程、生物硝化过程、生物反硝化过程、生物除磷过程可同时存在,在ASM3Bio-P模型上添加相关的开关函数,推导出完全耦合活性污泥模型(FCASM).基于计算机程序进行数值模拟,并将FCASM模拟结果与实测值以及ASM3Bio-P模型模拟值进行对比.结果表明,完全耦合活性污泥模型对氨氮模拟的稳态出水值为1.90g·m-3,ASM3Bio-P模型模拟的氨氮稳态出水值为0g·m-3,而实测的氨氮稳态出水值为1.50g·m-3,完全耦合活性污泥模型的结果更接近真实值.

According to the mechanism of microorganism growth, Full Coupled Activated Sludge Model （FCASM） which is modified from ASM3 Bio-P by adding inhibition switching function is introduced. Both steady - state numerical simulation and dependent - time numerical simulation on computer are carried out. The effluent value of NH4^＋ -N simulated by FCASM and ASM3 Bio-P are 1.90 g·m^ - 3 and 0g·m ^-3 respectively besides the measured effluent value is 1.50 g·m^-3. The result shows that FCASM correspond with the actual better than ASM3 Bio-P when they are employed in simulation of the process for NH3-N removal. Such conclusion also can be obtained from the results of dependent - time numerical simulation. There are littler differences between FCASM and ASM3 Bio-P when they are used for simulating the processes of COD and PO4^3- -P removal.