Dynamic analysis of Michaelis–Menten chemostat-type competition models with time delay and pulse in a polluted environment

摘要

In this paper, a new Michaelis–Menten type chemostat model with time delay and pulsed input nutrient concentration in a polluted environment is considered. We obtain a ‘microorganism-extinction’ semi-trivial periodic solution and establish the sufficient conditions for the global attractivity of the semi-trivial periodic solution. By use of new computational techniques for impulsive differential equations with delay, we prove and support with numerical calculations that the system is permanent. Our results show that time delays and the polluted environment can lead the microorganism species to be extinct. Keywords Permanence - Impulsive input - Michaelis–Menten type chemostat model - Time delay for growth response - Extinction