SU1178760A1 - Method of automatic control for anaerobic process of fermentation - Google Patents

Abstract

A method for the automatic control of anaerobic fermentation process, which involves the supply of starchy wort, royal yeast and a buffer solution, characterized in that, in order to increase the yield of the target product and reduce the time of anaerobic fermentation of the wort to ethanol. air is supplied to aeration to the fermenter at the initial moment of time of the anaerobic fermentation process, and the amount of air supplied to the aeration is determined by the formula K air, -C Q NH3 where the amount of air supplied to aeration; QMHI is the amount of buffering agent consumed; С is a constant, is equal to К КЭЭ in / IfiCIKC. fJnavc- maximum specific growth rate of microorganisms; Ji - coefficient taking into account the race of microorganisms.

Description

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1st The invention relates to the alcohol industry and may be used to automatically control the process of anaerobic bio-synthesis of ethanol from starchy wort. The aim of the invention is to increase the yield of the target product and reduce the time of the anaerobic balance. live wort on ethanol. The essence of the method is as follows. After the delivery of starchy wort, mother yeast and buffering agent at the initial moment of anaerobic alcoholic fermentation, the target product (ethanol) is slow because its growth is directly related to the growth of microorganisms, therefore, air is supplied to the aeration at the initial moment of time. anaerobic spin fermentation process to achieve the maximum specific growth rate of microorganisms, at which the best release of the target product (ethanol) occurs. When the maximum specific growth rate of microorganisms under the air is reached, the further progress of the alcohol fermentation process takes place under anaerobic conditions, and the amount of air supplied to aeration at the initial time of the anaerobic alcohol fermentation process i is determined from the following relationship. where Q ROSE is the amount of air, under. required for aeration; RnYa - the amount of buffer agent consumed; 4 C is a constant equal to K / QnHj with JMHOKc-r. - the maximum specific growth rate of microorganisms; K - coefficient taking into account the race of microorganisms; Example. The system consists of a farmer 1 (see drawing), a loop regulating fermentation temperature in enzyme 02re, including a fermentation temperature sensor 2 connected through a temperature reducer 3 in a fermenter with an actuator 4 installed on the cooling water supply line, the pH control loop the culture medium in the fermenter containing sensor 5 pH of the culture medium in the fermenter, connected through regulator 6 pH culture medium with the executive mechanism 7, installed on the supply line of the buffer agent and control loop Rovani supplying air for aeration in the fermentor 1, comprising a sensor 8, intake buffering agent microorganisms dividing unit 9, summing block 10, regulator 11 Torr air supply for aeration, which is coupled to an actuator 12 mounted on the air supply for aeration. The system works as follows. The signal from the fermentation temperature sensor 2 in the fermenter is fed to the fermentation temperature controller 3 in the fermenter, which compares the specified fermentation temperature with the current one and generates a signal for the actuator 4, which changes the flow of cooling water to the fermenter. The signal from the pH sensor 5 of the culture medium in the fermenter is fed to the pH regulator 6 of the culture medium in the fermenter, which compares the set pH value with the current one and generates a signal for executive mechanism 7 that changes the supply of the buffering agent to the fermenter. The change in the amount of the buffering agent supplied is measured by the sensor 8 of the consumption of the buffer agent by microorganisms, the signal that is fed to dividing unit 9, in which the current value of the ratio K / Qjiuj is calculated, the signal of which goes to summing unit 10 of this value with a constant value. Depending on G44 on the total signal of the regulation 2 11 v, the air supply to aeration generates a signal for the actuator 12 installed on the air supply line to the fermenter 1.

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Claims (1)

METHOD OF AUTOMATIC. CONTROL OF ANAEROBIC PROCESS OF WATERING, providing for the supply of starchy wort, uterine yeast and buffer solution, characterized in that, in order to increase the yield of the target product and reduce the time of anaerobic fermentation of the wort to ethanol, air is supplied for aeration to the fermenter at the initial time of ana fermentation, and the amount of supplied air for aeration is determined by the formula where is the amount of air supplied to aeration; Qnhi- amount of buffered agent consumed; C is a constant equal to To • _t ---.----. Q QnHj at JUHCtKC. 1 <g / Wiakg - maximum specific growth rate of microorganisms; I. - coefficient taking into account the race of microorganisms. SU .... 1178760