SU1330157A1 - Method of controlling the process of producing sugar-containing nutritive medium solution - Google Patents

Abstract

The invention relates to methods for controlling the preparation of a molasses nutrient solution and can be used in the microbiological, medical 9oZa and food industry. The method reduces the loss of sugars in the nutrient medium during sterilization, since it allows the total amount of sugar to be adjusted to the optimum pH setting for any nutrient medium composition that is set according to the total sugar content in sucrose. When the pH changes, the signal from sensor 9 is fed to the input of the controller 10, where it is compared with the task signal generated in device 11, based on the signals from the generator 7 of the total amount of sugars — laboratory analysis information about the concentration of the total amount and invert sugar According to the comparison result, the regulator 10 gives a signal to the valve 12 to change the supply of the correction agent. 1 il. ffo / r / jfft fm fOtiytMt jyfcfefftm SS (L with SA O SL H fft / mef / rrf / ft tr P1 Cfnf v / w3tftft / fO ---..--::

Description

The invention relates to methods for controlling the process of preparing a molar nutrient solution and can be applied in the microbiological and food industry.

The purpose of the invention is to reduce the loss of sugars during sterilization in the process of preparation of the nutrient medium.

The drawing shows the control system 1, which implements the method of coking the process of preparing a sugar-containing, for example molasses, solution of a nutrient medium.

20

25

The process control system of the precursor molasses into the mixing tank

I, thereby bringing the total amount of sugars to a given value. With all this, the pH of the prepared solution also changes, which is recorded by a pH sensor 9, from which a signal proportional to the concentration of hydrogen ions is fed to the input of the regulator 10, where it is compared with the reference signal generated in the device

II, on the basis of the signal entering into it - information of the laboratory analysis on the content of invert sugar in the total amount of sucrose of the molasses solution and the calculation of the desired value of pH using the formula

pH b, 59-0.09С, „, + 0.0006С,„,

where Cj, g - invert concentration

sugars in the total sugars of the sugar-containing solution.

When the reference signal exceeds the current value. The RN controller 10 generates a signal to the regulating valve 12 to supply a correction reagent (if the reagent is a solution), and when lowered, the regulator closes the supply of the correction reagent to the mixing tank 1.

The use of the proposed method allows, in comparison with the prototype, to reduce the loss of sugars when sterilizing the nutrient medium due to more accurate maintenance of pH.

The molasses solution of the nutrient medium consists of a level stabilization circuit in the mixing tank 1, which includes level 2 sensors, regulator 3, control valve 4 on the water supply line to mixing tank 1, the amount of sugar control loop in the nutrient solution, including the total concentration sensor 5 Sakharov sums, regulator 6, connected with unit 7 of the total amount of sugars and regulating valve 8 on the molasses supply line to mixing tank 1, the contour of regulating the pH of the molasses solution including the sensor IR 9 pH, regulator 10, device 11 forming a task, regulator 10 depending on the total amount of sugars invert sugar and regulating valve 12 on the supply line of the correction agent to the mixing tank 1.

The total content of sugars invert. Sugars in the original molasses can be determined by the method of Lane-Einon, Ofner, Munson-Walker, Bertrand, etc. The measurement error is 0, the analysis time is 30-40 minutes.

The frequency of definitions of total and invert sugars is determined by the frequency of changing batches, molasses. Usually, batches change once per shift or day.

Consequently, measurements of the concentration of total and invert sugars need to be carried out no more than once in Schmena and the result of the determination is manually entered into device 11,

The system works as follows. When selecting the nutrient medium on i; I e-ligation in mixing tank 1 at П1ЖГ1отс level. This is detected by a level 2 sensor from which sig35

40

Formula of the invention

55 A method of controlling the process of preparing a sugar-containing nutrient solution, which involves adjusting the amount of

The water enters the input of the regulator 3, where a control signal is generated to the control valve 4, which opens the water supply to the mixing tank 1, while the total amount of sugars starts to decrease in the prepared nutrient medium, which is detected by the sensor 5, the signal from which to the input of the regulator 6 and here the signal comes from set 7, and the output of the regulator in this case receives a signal to the control valve 8, which opens the supply of the inventive

55 A method of controlling the process of preparing a sugar-containing nutrient solution, which involves adjusting the amount of

31330157

sugar-in in solution by changing the ratio, and the task of adjusting the pH

supplying molasses and adjusting the pH, is determined by the formula by changing the supply of the correction reagent, characterized in that pH 6.59-0.09 ° C, p + 0, OOObS, that in order to reduce the losses of sugars

during sterilization in the preparative process, where Cj, is the concentration of inverse laziness of the nutrient medium, the sugars in the total amount of sugar content of invert sugar in the total sugar content of sugar content of sugar-containing solution are determined.

Compiled by G. Bogacheva Editor N. Kishtulinets Tekhred L. Serdyukova Proofreader L. Beskid

Order 3540/27 Circulation 499 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

Claim 55 A method for controlling the process of preparing a sugar-containing solution of a nutrient medium, which comprises controlling the total amount of sugars in the solution by changing the molasses supply and adjusting the pH by changing the flow of the correcting reagent, characterized in that, in order to reduce the loss of sugars during sterilization during preparation of the nutrient medium, the content invert sugar in the total amount of sugars of a sugar-containing solution, and the task for regulating the pH is determined by the formula pH »6.59-0.09C _mIv + 0.000bS ' _mnv where C _iiv is the concentration of inverse sugar in the total amount of sugars of a sugar-containing solution.