Microbial growth Batch culture: When microorganisms are grown in a closed system, population growth remains exponential for only a few generations and then enters a stationary hase due to factors like nutrient limitation and waste accumulation Continuous Culture If a population is cultured in an open system with continual nutrient addition and waste removal the exponential phase can be maintained for long periodsMicrobial growth • Batch culture: When microorganisms are grown in a closed system, population growth remains exponential for only a few generations and then enters a stationary phase due to factors like nutrient limitation and waste accumulation. • Continuous Culture: If a population is cultured in an open system with continual nutrient addition and waste removal, the exponential phase can be maintained for long periods