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FIG.33. Experimental RTD curves measured at each compartment.FIG.34. Model of the flow in the whole bioreactor.FIG.35. The model and the experimental data for the whole bioreactor.The cumulative RTD function F(t) was calculated for each compartment from simulatedexperimental RTD curves (Fig. 36). The F(t) function specifies the traced material flowing out thetank after the time t. This function provides also the sampling time at the outlet of each tank for thesame irradiation regime. This was an important parameter of the whole irradiation facility forperforming representative samplings after every change of operational condition of the electron beamaccelerator. Representative samplings were necessary for reliable data of the treatment processefficiency and scaling up the pilot plant results.43