Plant gate costs

Having noted these technical matters, it should, however, also be observed that the operational flexibility of available processing equipment usually quite subordinates them to coal costs (which represent between 25 and kO per cent of the plant gate costs of the product). Most future conversion plants are therefore likely to use lignites and subbituminous coals which, in Canada as in many other countries, are abundantly available at low cost through surface-mining. 

Engineering-scale biological system ( 10/kg plant-gate cost projection)... 

Plant gate costs are ottver costs concerning the fermentation plant for example depreciation, taxes and insurance and other plant overhead costs. Fifteen years depreciation is not abnormal. This brings the depreciation costs to 2 million a year. 

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