| abstract |
A biotechnological process for conversion of a raw material ( 100, 200 ) to a desired product ( 130, 230 ) by means of one or more biological or biochemical agents ( 102, 104, 202 ) such as microorganisms and/or enzymes characterised in that the amount of one or more of said biological or biochemical agents ( 102, 104, 202 ) is controllable by a process control algorithm ( 124,224 ) dependent on one or more values of interest related to a process stream. A specific aspect of the invention is the use of a process control algorithm for controlling enzyme addition in biofuel production by fermentation of biomass to alcohols. |