Abstract
A micro-minicomputer control hierarchy has been developped for a laboratory scale fermentor. The 20-liter fermentor is used for fed-batch aerobic yeast production (Saccharomyces Cerevisiae) from carbohydrate substrates. It is fully analogically instrumented and has low-level control on variables such as temperature, pH with hardware controllers with set-point control. Our fermentation requires a control of dissolved oxygen concentration, the control variables being the air flowrate and the agitation speed. In fed-batch a control of substrate flowrate is required. This is done using a peristaltic pump and a load cell. Other sensors include effluent gas analysers for oxygen and carbon dioxide.
Published Version
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