Abstract:Previous studies have shown that there is a synergistic effect between main and secondary leaching microorganisms in bioleaching process, and the two promote each other to improve bioleaching efficiency. How do main and secondary leaching microorganisms promote each other and make each other grow better? What is the internal mechanism of their growth? Lotka-Volterra model is widely used in study of biological quantity growth model under two kinds of interaction, which has reference value for study of microbial growth kinetics model of main and secondary leaching microorganisms in biological leaching. Independent symbiosis and competitive symbiosis equations of main and secondary leaching microorganisms are obtained from Lotka-Volterra model, and the synergy kinetics model is established according to synergistic characteristics of main and secondary leaching microorganisms. The synergistic self-organizing stable point can be derived from the model. The difference between stable state point and experimental results is small, indicating that fitting effect of microbial growth kinetics models for bioleaching uranium leaching and auxiliary leaching is good. Application of Lotka-Volterra model to bioleaching is novel and provides a new research perspective. It has important theoretical and practical significance for improving problem of microbial synergy in bioleaching and improving bioleaching efficiency.