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Hello students, the growth of microorganism can be controlled through physical, chemical, mechanical and biological method.
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Physical method involves heat, by increasing the heat we can kill the microorganism like increasing the temperature above 60 degree celsius.
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It also involves filtration, by passing the fluid through highly minimized pore size filter can also reduce the growth of microorganism.
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Another one is radiation, by using uv rays we can also control the growth of microorganism.
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And last is pressure, by increasing the pressure in the system can lead to the inhibit the growth of microorganism.
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The chemical method involves disinfection, the disinfection can be done by application of detergent, another one is antiseptic, by application of antiseptic the growth of microorganism can also be checked.
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Addition of preservative like salt and sugar helps to reduce the growth of microorganism.
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And last is antibiotic, the use of antibiotic like streptomycin and penicillin can also inhibit the growth of certain bacteria...