Difference between batch, fed- batch and continuous culture technique

Difference between batch, fed-batch and continuous culture technique

Characteristics	Batch culture	Fed-batch culture	Continuous culture
Cultivation system	Closed type	Semi-closed type	Open type
Addition of fresh nutrition	No	Yes	Yes
Volume of culture	Constant	Increases	Constant
Removal of wastes	No	No	Yes
Chance of contamination	minimum	Intermediate	Maximum
Growth phase	Lag, log, stationary and decline phase	Lag, log , stationary and decline phase	Lag and log phase
Log phase	Shorter	longer	Longest and Continuous
Density of bacteria	Change with time	Change with time	Remain same
Product yield	Low	Medium	High