Based on the principle of active biofilm expansion ,a non-steady state analytic mathematical model of microbial interactions in nitrifying biofilm was developed.

• 根据活性生物膜扩张原理，建立了硝化生物膜中微生物相互作用的非稳态解析数学模型，并可预测生物膜厚度的变化与微生物菌群的空间分布。