KR100298215B1 - Apparatus and method for treatment of residual culture liquid from facilities for cultivation of vegetable in solid medium - Google Patents

Abstract

PURPOSE: Provided are a method and apparatus for treatment of the titled residual culture liquid by preheating a culture liquid with heat from a high temperature culture liquid discharged from a heating part and then controlling the heating temperature of the heating part and the operation of a pump to supply the medium liquid to be sterilized by the signal from temperature sensor. Whereby energy saving is achieved without special cooling means and the sterilization treatment of the residual culture liquid is effectively performed. CONSTITUTION: This apparatus comprises: a heating part(5) with at least two heating means to heat a culture liquid to a specified temperature, supplied from a collecting tank(2) for collecting a culture medium discharged from solid medium cultivation facilities by a pump(4); a heat exchange part(6) for preheating a culture liquid to be sterilized, supplied from the heating part as well as cooling by the use of heat exchange in accordance with a difference in temperature between the sterilized high temperature culture liquid and the culture liquid to be sterilized; and a control part(7) for controlling the operation of the heating means and the culture liquid supply pump according to the program.

Description

Apparatus and method for treating excess culture in solid medium cultivation

The present invention relates to an apparatus and a method for treating surplus culture medium discharged after use in a culture medium supplied when cultivating crops, such as vegetables, in a solid medium. Particularly, the present invention is heated and sterilized for recycling of excess culture solution to be discarded and then discharged to a high temperature state. By recovering the heat energy from the excess culture solution to preheat the culture medium to be heat sterilized, to improve the energy required to heat the excess culture solution to be sterilized, and to reduce the energy required for the heating of the excess culture solution, and to continuously reuse and to sterilize the excess culture solution The present invention relates to a culture solution processing apparatus and a method for improving sterilization and recycling of a waste culture solution to prevent problems of soil and water pollution due to discharge and to prevent bacterial infection of cultivated crops by pathogens.

In general, methods for cultivating crops under the supply of culture medium and solid medium cultivation methods are widely used in order to effectively cope with the lack of farmland and the increase in prices and the pollution of farmland and rivers, and for the clean cultivation of crops such as vegetables. However, there has been a problem of safe and efficient treatment of the culture medium supplied during the solid medium cultivation. For example, 10-30% of the cultures supplied for cultivation in solid medium are discharged as excess culture, which must be sterilized upon recycling. When bacteria are included in the reused culture, the roots of crops, such as vegetables grown in solid media, are infected and diseased, resulting in a problem of deterioration of quality. And pollute the water quality, causing environmental problems.

The most preferable treatment of the surplus culture solution in the cultivation of crops in the solid medium as described above is to efficiently sterilize and reuse the excess culture solution. The sterilization treatment necessary for the reuse of the excess culture was conventionally proposed to use an ultraviolet lamp, but this method has the advantage that the treatment capacity is large, but it is difficult to obtain the required sterilization effect due to the opacity of the ultraviolet disinfection treatment effect. there was. In addition, it has been proposed to sterilize the culture medium by steam, but this method has a problem that the sterilization apparatus is large and the thermal efficiency is low because the heating and cooling functions are separated separately.

An object of the present invention is to compact the solution to solve the problems caused by the surplus culture solution generated in the cultivation of crops, such as vegetables in the conventional solid medium described above, the culture medium heated to a high temperature for sterilization while excellent sterilization effect by heating It is to provide a culture medium processing apparatus and method capable of pre-heating the culture medium to be recovered by cooling the heat from the cooling and to treat the excess culture solution in economical and continuous in terms of energy use efficiency.

1 is a schematic diagram of an excess culture solution processing apparatus of the present invention.

Figure 2 is a block diagram for explaining the whole process of processing the culture solution in the culture solution processing apparatus of FIG.

Figure 3 is a longitudinal sectional view showing the structure of the heating portion of the culture medium treatment apparatus.

Figure 4 is a cross-sectional view showing the structure of the heat exchange unit of the culture solution processing apparatus.

5 is an exploded perspective view of a portion of the heat exchanger of FIG.

In order to achieve the above object, the excess culture medium treatment apparatus discharged during solid medium cultivation according to the present invention comprises a heating unit for heating and sterilizing the culture medium supplied by the pump from the culture medium collecting tank to a predetermined temperature by heating means; A heat exchanger for preheating the sterilized culture medium supplied to the heating unit by using a relatively high temperature of the culture medium discharged from the heating unit, and the operation of the heating means of the heater and the operation of the culture medium supply pump as previously programmed. And a control unit for controlling the heating unit, wherein the heating unit includes at least two heating means in a housing in which a culture inlet and an outlet are formed, and the heat exchanger is sterilized by separating a plurality of thermal conductive plates having excellent thermal conductivity. Alternating passages with culture passageways for sterilization Is configured are formed adjacent to each other.

Excess culture solution treatment method according to the present invention is supplied to the excess culture medium by the pump from the excess culture medium collection tank to the heating unit by heating to a predetermined temperature by a heating means to sterilize, while discharging the heat sterilized culture solution from the heating unit to the heat exchange unit Before the surplus culture solution to be sterilized is passed through the heat exchange unit, the preheated excess culture solution to be sterilized is preheated by using a temperature difference with the high temperature culture solution discharged by the heat sterilization process. When the heating temperature detected by the sensor reaches the set temperature, the controller recognizes that the culture solution is heated and sterilized, and operates the pump to supply additional culture solution for sterilization to discharge the sterilized culture solution to the heat exchanger. If the temperature is lower than the set temperature, do not operate the pump Only the stages are operated, and at least two heating means provided in the heating unit are controlled to operate the heating means in conjunction with the sensing temperature so that all the heating means are operated below the preset temperature and partially operated above the preset temperature. Sterilize the culture.

Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in detail the present invention.

Figure 1 schematically shows a surplus culture medium processing apparatus (1) compactly configured in accordance with the present invention, Figure 2 is a collection tank (2) for collecting the excess culture liquid discharged from the solid medium cultivation facility such a culture medium processing apparatus and It is a block diagram for explaining the continuous processing of the excess culture solution, including a culture medium storage tank (3) for sterilizing and storing the culture solution supplied therefrom reusable. The remaining excess culture solution used in the solid medium cultivation facility is collected in the collection tank 20 and then reused by sterilization in the treatment apparatus 1 of the present invention.

The excess culture solution processing apparatus 1 according to the present invention is a temperature difference between the heating unit 5 for heating and sterilizing the culture solution supplied from the collection tank 2 to the pump 4 and the sterilized high temperature culture solution discharged therefrom. It comprises a heat exchange unit 6 for preheating the feed culture to be sterilized by using a control unit 7 for controlling the heating temperature of the culture medium supply pump 4 and the heating unit 5 and the like.

In the operation of the pump 4 controlled by the control unit 7 shown briefly in FIG. 2, the culture medium is supplied from the collecting tank 2 and passed through the heat exchanger 6 to be sterilized by, for example, an electric heater as a heating means. It is supplied to the heating part 5 to process. As shown in FIG. 3, the heating unit 5 includes three heaters 10 each disposed in a case (not shown) made of a material having good thermal conductivity. A culture solution inlet 11 to be sterilized is formed at the lower end, and an outlet 12 of the culture solution sterilized by heating is formed at the top. The cover 14 has a known fastener 16 such as a bolt or nut on the flange 15 of the housing to seal the interior of the housing 8 and to hold the electrical terminals 13 of the heaters 10. It is kept confidential. A seal packing 17 is disposed between the cover 14 and the flange 15 to prevent leakage of the culture medium heated to the outside even when the culture solution is heated by the heater. The terminals 13 of the respective heaters held by the cover 14 of the housing are controlled by the controller of the control unit 7 in connection with the power source.

In addition, the housing 8 of the heating unit is provided with a temperature sensor 18 to measure the temperature of the culture medium heated by the heaters 10 in the housing 8 and sends a signal to the controller of the controller 7. In the controller of the control unit 7, conditions for the temperature and heating time for sterilizing the culture medium are set in advance, and the temperature of the culture solution accommodated in the heating unit housing 8 by a signal from the temperature sensor 18 is a predetermined temperature. In order to maintain the state for a certain time so that the culture solution is completely sterilized, the three heaters 10 were initially operated in accordance with the temperature inside the housing by operating only two or one heater. Control the heaters to operate in whole or in part.

As such, when the preset temperature condition is met and the heating time elapses, the controller 7 determines that the culture medium has been sufficiently sterilized by heating by the heaters 10, and the pump 4 is operated again to perform a new sterilization process. As the culture solution is supplied and introduced into the heating unit 5, the culture solution sterilized by the heating unit is discharged through the outlet 12. The culture solution sterilized by the heating is discharged in a heated state, and the discharge pipe 19 passes through the heat exchange unit 6.

The heat exchange part 6 is made of a metal material having good thermal conductivity as shown schematically in FIGS. 4 and 5, and a plurality of heat conductive plates having passage holes 24, 24 ′, 25 and 25 ′ formed at four corners. (20) are spaced apart and the sealing packing material (23, 23 ') are alternately disposed between the spaces formed between the heat conduction plate 20 and the packing material (23, 23') is a high temperature sterilization Formed passage 21 for the treated culture solution and the passage 22 for the surplus culture medium to be sterilized and supplied to the heating unit 5 adjacent thereto, and the heat conduction plate 20 from the culture medium in a high temperature state sterilized by heating. Preheating of the relatively cold culture to be sterilized, which is supplied from the collecting tank 2 to the heating unit 5 by the heat conducted through. Accordingly, the sterilized culture solution is cooled as the heat is taken away, stored in the storage tank 3, and then used again for growing crops in the solid medium.

In the drawing, reference numeral 26 denotes an air vent for preventing the flow of the culture solution by discharging when the air is sterilized and then provided to the culture solution discharge pipe discharged from the heating unit. Further, reference numeral 27 denotes a check valve normally provided to prevent backflow of the culture liquid supplied to the heating portion by the pump as a check valve.

According to the present invention, the culture medium to be sterilized by heat from the high temperature culture solution discharged by heat sterilization in the heating section is preheated before the heat sterilization treatment in the heating section 5 so that the culture medium with less energy in the heating section 5 can be obtained. It can be quickly heated to a predetermined temperature, and the culture liquid discharged by sterilization is cooled quickly without using a separate cooling means, thereby saving energy, and operating the pump for heating temperature and heating the sterilization culture medium in the heating part. By controlling according to the pre-programmed according to the signal from the temperature sensor provided in the heating unit there is an advantage that can be efficiently carried out sterilization of the excess culture solution continuously.

Claims (5)

A heating unit 5 having at least two heating means for disinfecting the culture medium supplied by the pump 4 from the culture medium collecting tank 2 discharged from the solid medium cultivation facility to a predetermined temperature, and discharged from the heating unit. The sterilized culture solution is cooled and the sterilized culture solution is supplied to the heating unit 5 by heat exchange according to the temperature difference between the sterilized high temperature culture solution and the culture solution to be sterilized supplied through a passage adjacent thereto. Excess culture medium processing apparatus for solid medium cultivation comprising a heat exchanger (6) for preheating the control unit and a control unit (7) for controlling the operation of the heating means and the culture medium supply pump (4) according to the pre-programmed . The method of claim 1, wherein the heating unit 5 comprises a housing (8) having a culture inlet (11) and an outlet (12) formed therein, and at least one heating means provided therein to heat the culture medium. , The heating means is a surplus culture medium treatment apparatus in solid medium cultivation, characterized in that the electric heater 10 is provided in the case of a material having good thermal conductivity. According to claim 1, wherein the heat exchange part 6 is formed in the four openings for the passage holes (24, 24 ', 25, 25') spaced apart and packed a plurality of heat conductive plates 20 having excellent thermal conductivity The ashes 23 and 23 'are alternately disposed between the heat conduction plates to form a sterilized culture passage 21 and a culture passage 22 to be sterilized by heat conducted from the sterilized hot culture solution. Excess culture solution processing apparatus in solid medium culture, characterized in that configured to preheat the culture. The culture medium is supplied to the heating unit 5 by the pump 4 from the collecting tank 2 collecting the excess culture liquid discharged from the solid medium cultivation facility, heated to a predetermined temperature and sterilized, and heated by the heating unit 5. While the sterilized culture solution is discharged to the heat exchange unit 6, the culture medium to be sterilized is passed through the heat exchange unit 6 before being fed to the heating unit 5 by conduction heat from the hot culture solution discharged by the heat sterilization treatment. Preheat the culture medium to be sterilized, and when the heating temperature sensed by the sensor during the sterilization process in the heating unit 5 reaches the set temperature, the controller recognizes that the culture medium is heated and sterilized and operates the pump 4. By further supplying the culture medium to be sterilized, the sterilized culture solution is discharged to the heat exchange unit 6, and if the temperature sensed by the sensor 18 is lower than the set temperature, the pump 4 is not operated. Excess culture liquid processing apparatus in solid medium cultivation consists in actuating the heating means of the yeolbu. 5. A heating device (5) according to claim 4, comprising at least two electrical heating means (10) provided in said heating section (5), wherein all of the heating means (10) are operated below a preset temperature while heating means above a set temperature. Surplus culture solution treatment method in the cultivation of solid medium, characterized in that for controlling some of them to operate the heating means in conjunction with the sensing temperature.