Economy Of The Fermentation Process

As already mentioned, economy of the fermentation processes must consider the cost of waste-liquor treatment. It is difficult to accurately estimate the economic contribution of waste treatment because this factor is affected by many factors other than fermentation, such as environmental regulation around the location of the plant and so forth. In this discussion, process economics is limited to the steps that begin with the selection of raw materials and end with the desired products. A primary part of the cost of fermentation processes is the cost of the carbon source, which is decided by the (1) unit price of the carbon source, (2) fermentation yield, and (3) purification yield. In l-glutamic acid fermentation, because the carbon source to be used directly affects these three points, selection of the carbon source is particularly important. On the other hand, in the case of fermentation of other amino acids in

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