steady state and dynamic fermentations of baker's yeast in molasses based media were analyzed in a laboratory scale bioreactor. sugar and biomass balances together with the monod biokinetics were used to develop the process model. parameters of the model were obtained using collected experimental data. model predicted open loop responses to step changes in feed concentration as well as dilution...

an adaptive input-output linearization method for general nonlinear systems is developed without using states of the system. another key feature of this structure is the fact that, it does not need model of the system. in this scheme, neurolinearizer has few weights, so it is practical in adaptive situations.  online training of neurolinearizer is compared to model predictive recurrent training...

ph control is a challenging problem due to its highly nonlinear nature. in this paper the performances of two different adaptive global linearizing controllers (glc) are compared. least squares technique has been used for identifying the titration curve. the first controller is a standard glc based on material balances of each species. for implementation of this controller a nonlinear state est...

This note shows that PH = H = J H = J m H holds for any non-trivial extension closed pseudovariety of groups. It is known that BH 6 = J m H if H 6 = G. Hence, we generalize as much as possible of the equation PG = BG.

pH SENSOR The final control element can be a pump or an ON/OFF valve. Sizing of the final control element is complicated and depends on many factors. This is one situation where a titration curve can be invaluable. In many cases, it may be necessary to use two final control elements, each delivering different amounts of chemical and having different setpoints. For example, one valve may deliver...