JP2005110619A - Apparatus for proliferating microorganism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for proliferating a microorganism in which cleaning ability of a septic tank can be improved and the amount of stock solution used can be reduced by efficiently proliferating the microorganism. <P>SOLUTION: The apparatus 10 for proliferating the microorganism is connected to a septic tank (not illustrated) using the microorganism and is used for proliferating the microorganism and the apparatus 10 is equipped with a proliferation tank 20 for storing water and further housing BAKUHANSEKI (a kind of granite porphyry) 22, a microorganism-containing liquid transfer pipe 23 fed out from the proliferation tank 20 and transferring water containing the microorganism, a storage tank 14 for storing water containing the microorganism and a pump 34 and a reflux pipe 29 for refluxing water containing the microorganism from the storage tank 14 to the proliferation tank 20. The microorganism can efficiently be proliferated by passing water containing the microorganism from the storage tank 14 through a reflux pipe 29, the proliferation tank 20 and the microorganism-containing liquid transfer pipe 23 and recycling the water to the storage tank 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a microorganism growth apparatus.

  Conventionally, in order to decompose organic matter contained in wastewater, purification methods using biodegradation of organic matter by microorganisms such as bacteria and bacteria have been widely used in water and sewage treatment, factory wastewater treatment, domestic wastewater septic tanks, etc. Yes.

  However, wastewater discharged from places that handle large amounts of ingredients such as hotels, inns, and canteens contains a large amount of organic substances such as animal and vegetable oils, proteins, starch, and sugar. For this reason, in facilities that discharge wastewater containing a large amount of organic matter as described above, the ability to purify wastewater by microorganisms is insufficient, and organic matter may not be sufficiently decomposed.

  In addition, since microorganisms that have decomposed organic matter settle as sludge at the bottom of the septic tank, it is necessary to periodically replenish the septic tank with a stock solution containing a high concentration of microorganisms in order to maintain the purification capacity of the septic tank. For this reason, in a septic tank used in a facility that discharges wastewater containing a large amount of organic matter, the consumption of microorganisms increases, resulting in an increase in the consumption of stock solution. Since this stock solution is expensive, there is a problem that high cost is required to maintain the purification capacity of the septic tank.

In order to solve the above problems, a technique has been proposed in which a culture tank is provided in a septic tank and microorganisms are propagated in the culture tank (see Patent Document 1). Thereby, even when the organic matter in the wastewater increased, the purification ability was expected to be improved by the microorganisms grown in the culture tank. Moreover, even when the consumption of microorganisms increased, it was expected that the amount of the stock solution used could be reduced by purifying the wastewater using microorganisms grown in the culture tank.
Japanese Unexamined Patent Publication No. 7-171582

  However, since the environment in the culture tank provided in the septic tank is not necessarily suitable for the growth of microorganisms, the microorganisms cannot be sufficiently propagated, and the purification capacity of the septic tank cannot be sufficiently improved. There wasn't. Further, the amount of the stock solution used could not be reduced sufficiently.

  The present invention has been completed based on the above circumstances, and the growth of microorganisms that can improve the purification capacity of the septic tank and reduce the amount of the stock solution by efficiently growing the microorganisms. An object is to provide an apparatus.

  As a means for achieving the above object, the invention of claim 1 is a microorganism growth apparatus, comprising a breeding tank for storing water and storing a porous material for fixing and growing microorganisms. , A microorganism transfer means for transferring water containing the microorganisms derived from the growth tank, a storage tank connected to the microorganism transfer means for storing water containing the microorganisms, and from the storage tank to the growth tank Reflux means for refluxing water containing microorganisms, microorganism release means for releasing water containing microorganisms from the storage tank, and replenishment of water in the storage tank released by the microorganism release means It comprises water injection means for injecting water into the storage tank or the growth tank, and stock solution input means for supplying the stock solution containing the microorganisms to the storage tank or the growth tank.

  According to a second aspect of the present invention, in the microorganism growth apparatus according to the first aspect, the microorganism discharge means is provided with a water discharge valve that can be opened and closed by an electrical signal, and the time interval for opening the water discharge valve and the microorganism A water discharge valve opening condition setting means for setting a water discharge amount including water, a storage device for storing the conditions set by the water discharge valve opening condition setting means, and a timer for measuring a time interval for opening the water discharge valve And, based on the signal output from the timer, according to the conditions stored in the storage device, the water discharge valve is opened at predetermined time intervals to release a predetermined amount of water containing the microorganisms from the storage tank. And a water discharge valve control means for controlling as described above.

  According to a third aspect of the present invention, in the microorganism growth apparatus according to the first or second aspect, the water injection means is provided with a water injection valve that can be opened and closed by an electric signal, and detects the water level in the storage tank. Water level detecting means provided in the storage tank, and when the water level detected by the water level detecting means falls below a predetermined water level, the water injection valve is opened to inject water to a predetermined water level, and the storage And a water injection valve control means for controlling the water injection valve so that water of a predetermined water level is stored in the tank.

  According to a fourth aspect of the present invention, in the microorganism growth apparatus according to any one of the first to third aspects, the stock solution charging means is provided with a stock solution charging valve that can be opened and closed by an electric signal, and Detected by a water discharge amount detecting means for detecting the water discharge amount of the water containing the microorganisms to be released or a water injection amount detecting means for detecting the water injection amount of water injected into the storage tank or the breeding tank, and the water discharge amount detecting means. The stock solution input amount determining means for determining the input amount of the stock solution based on the discharged water amount or the water injection amount detected by the water injection amount detecting means, and the stock solution input amount determined by the stock solution input amount determining means In accordance with the present invention, there is provided a stock solution introduction valve control means for controlling the stock solution introduction valve so that a predetermined amount of the stock solution is introduced into the storage tank or the growth tank.

<Invention of Claim 1>
Even when microorganisms are introduced into the storage tank or the growth tank by the stock solution charging means, the microorganisms are not easily propagated only by being dispersed in water, but are more likely to grow if they are fixed on the porous material. Therefore, microorganisms can be efficiently propagated in the breeding tank by storing water in the breeding tank and accommodating the porous material. Thereby, the usage-amount of the stock solution containing microorganisms can be reduced. The porous material is not particularly limited as long as microorganisms can be fixed and proliferated, and examples thereof include barley stone, activated carbon, ceramic, chitopearl, and chitosan.

  By transferring the microorganisms grown in the growth tank to the storage tank by the microorganism transfer means and storing the water containing the microorganisms in the storage tank, a large amount of water containing the microorganisms can be stored. And by providing the microorganism discharge | release means which discharge | releases the water containing microorganisms from a storage tank, the water which contains a large quantity of microorganisms hold | maintained in the storage tank can be discharged | emitted to a septic tank as needed. . Thereby, the purification capacity of the septic tank can be improved.

  When there is no flow of water in the growth tank, the concentration of microorganisms becomes too high, and as a result, the microorganisms die and become sludge, and the porous material may lose its activity due to clogging of the pores of the porous material. Then, there are cases where microorganisms are difficult to grow even in the growth tank. According to the first aspect of the present invention, there is provided reflux means for circulating water containing microorganisms from the storage tank to the breeding tank, so that the microorganisms can be transferred from the breeding tank to the storage tank and from the storage tank to the breeding tank. As a result of the circulation of water containing water, a flow of water containing microorganisms is generated in the growth tank. Thereby, as a result of moderately suppressing the concentration of microorganisms in the breeding tank, it is possible to prevent the generation of sludge by killing microorganisms. Then, since the activity of the porous agent is not lost, microorganisms can be constantly grown in the growth tank. This eliminates the cost required to replace the porous agent that has lost its activity, and also reduces the amount of stock solution used to replenish dead microorganisms, thus reducing costs. Can do.

  Further, by circulating water containing microorganisms between the breeding tank and the storage tank, air is appropriately dissolved in the water, so that the growth of microorganisms is promoted.

  Since the reflux means is provided, even when the stock solution containing microorganisms is injected into the storage tank, the stock solution is diluted in the storage tank, and the water containing microorganisms in the storage tank is transferred to the breeding tank, Microorganisms can be efficiently propagated.

  When the water in the storage tank is released to the septic tank by the microorganism releasing means, the water is supplied to the storage tank or the breeding tank by the water injection means. By replenishing water, the amount of water in the breeding apparatus is kept above a certain amount, but the microbial concentration is temporarily reduced. However, since the microorganisms grow in the breeding tank while the water containing the microorganisms circulates between the breeding tank and the storage tank, the microorganism concentration is recovered. Thus, according to the invention of claim 1, it becomes possible to always keep a certain amount or more of water containing a large amount of microorganisms in the breeding apparatus. As a result, even when the purification capacity of the septic tank is insufficient, water containing microorganisms can be constantly supplied from the growth device, so that the purification capacity of the septic tank can be improved.

<Invention of Claim 2>
The user first sets a time interval for opening the water discharge valve and a water discharge amount of water containing microorganisms in the water retention valve open condition setting means. Then, the setting conditions are stored in the storage device. In accordance with the conditions stored in the storage device, based on a signal output from a timer that measures the time interval for opening the water discharge valve, the control unit opens the water discharge valve at predetermined time intervals to supply water containing microorganisms. A predetermined amount is discharged from the storage tank to the septic tank. Thus, according to the invention of claim 2, the process of releasing the microorganisms to the septic tank can be automated, so that labor saving can be achieved. In addition, when setting the above conditions, it is possible to release an appropriate amount of water containing microorganisms into the septic tank, taking into account the degree of contamination of wastewater to be treated and the treatment capacity of the septic tank, The microorganism growth apparatus according to the present invention can be operated efficiently.

<Invention of Claim 3>
The water level in the storage tank is detected by the water level detection means. When this water level falls below the predetermined water level, the water injection valve is opened by the water injection valve control means, and water is supplied to the predetermined water level. As described above, according to the third aspect of the present invention, a predetermined amount of water containing microorganisms can be stored in the breeding apparatus. As a result, even when the purification capacity of the septic tank is insufficient, water containing microorganisms can be constantly supplied from the growth device, so that the purification capacity of the septic tank can be improved. Moreover, since the process of replenishing the breeding apparatus with water can be automated, the amount of water injection can be controlled efficiently, resulting in cost reduction.

<Invention of Claim 4>
It is possible to detect the water discharge amount of the water containing microorganisms released from the storage tank to the septic tank by the water discharge amount detection means, and to detect the water injection amount injected into the storage tank or the breeding tank by the water injection amount detection means. It is possible. Based on these water discharge amount or water injection amount, the amount of the stock solution to be put into the storage tank or the breeding tank is determined by the stock solution input amount determining means. The stock solution is fed into the storage tank or the growth tank by the stock solution feed amount control means by the amount of stock solution thus determined. Thereby, since the quantity of the stock solution thrown into a storage tank or a breeding tank can be controlled efficiently, cost reduction can be aimed at.

<First Embodiment>
A first embodiment according to the present invention will be described with reference to FIGS.
First, the structure will be described with reference to FIG. The microorganism growth apparatus 10 according to this embodiment is used by being attached to a septic tank (not shown) for wastewater treatment. The septic tank (not shown) is provided with a microorganism-containing liquid discharge pipe 11 (corresponding to a microbial release means), and is configured so that water containing microorganisms can be transferred from the breeding apparatus 10 to the septic tank (not shown). Yes. The microorganism-containing liquid discharge pipe 11 is provided with a microorganism-containing liquid discharge valve 12 (corresponding to a water discharge valve) for controlling the amount of water containing microorganisms to be transferred. The microorganism-containing liquid discharge valve 12 is connected to a control unit 13 (corresponding to a water discharge valve control means), and the opening and closing of the microorganism-containing liquid discharge valve 12 can be controlled by the control unit 13. The other end of the microorganism-containing liquid discharge pipe 11 is connected to a position closer to the left end of the bottom of the storage tank 14 for storing water containing microorganisms.

  The storage tank 14 has a hollow box shape, and a water supply pipe 15 (corresponding to water injection means) for injecting water into the storage tank 14 is provided at a position near the left end of the ceiling portion of the storage tank 14. It has been. The water supply pipe 15 extends downward from the ceiling portion of the storage tank 14, passes through a partition wall 17 described later, and opens to a space below the partition wall 17. The water supply pipe 15 is provided with a raw water supply valve 16 (corresponding to a water injection valve) for controlling the amount of raw water poured into the storage tank 14. The raw water supply valve 16 is connected to a control unit 13 (corresponding to a water injection valve control means), and the opening and closing of the raw water supply valve 16 can be controlled by the control unit 13. The raw water is not particularly limited as long as no germs are mixed therein, and for example, tap water, ground water, or the like can be used.

  Inside the storage tank 14, a partition wall 17 that divides the storage tank 14 in the vertical direction is provided at a position slightly closer to the ceiling portion between the ceiling portion and the bottom portion of the storage tank 14. Water containing microorganisms can be stored in a space below the partition wall 17. Between the partition wall 17 and the bottom of the storage tank 14 in the right side wall of the storage tank 14, a total of three water level sensors 18A for detecting the water level in the storage tank 14 are provided. 18B and 18C (corresponding to water level detection means) are provided at substantially equal intervals in the vertical direction, and become the first water level sensor 18A, the second water level sensor 18B, and the third water level sensor 18C in order from the top. Yes. The first to third water level sensors 18A to 18C are connected to the control unit 13, respectively. Near the bottom of the storage tank 14 and below the third water level sensor 18C, a storage tank heater 19 is provided for adjusting the water containing the microorganisms to a temperature suitable for the growth of the microorganisms. ing. The storage tank heater 19 is connected to the control unit 13 and can be controlled by the control unit 13.

  On the other hand, a space above the partition wall 17 is provided with a growth tank 20 for growing microorganisms and a filter 21 for filtering water containing microorganisms. The breeding tank 20 is arranged so as to occupy substantially the right half of the space above the partition wall 17. The breeding tank 20 has a hollow box shape, in which barley stone 22 (corresponding to a porous material) is stored, and water containing microorganisms can be stored. A microorganism-containing liquid transfer pipe 23 (corresponding to a microorganism transfer means) for transferring water containing microorganisms from the growth tank 20 to the storage tank 14 extends in the vertical direction at a position on the right side of the growth tank 20. The bottom of the breeding tank 20 and the partition wall 17 are provided. The upper end of the microorganism-containing liquid transfer pipe 23 is disposed at a position substantially the same as the height of the barley stone 22 accommodated in the breeding tank 20. On the other hand, the lower end of the microorganism-containing liquid transfer pipe 23 opens into the storage tank 20, and is positioned slightly below the second water level sensor 18B.

  From the ceiling portion of the breeding tank 20, a stock solution injection pipe 24 (corresponding to a stock solution feeding means) for feeding a stock solution containing microorganisms into the storage tank 14 is arranged extending vertically in the breeding tank 20. The stock solution injection pipe 24 is provided through the bottom of the breeding tank 20 and the partition wall 17, and the lower end of the stock solution injection pipe 24 opens into a space below the partition wall 17. The stock solution injection pipe 24 extends upward through the ceiling of the breeding tank 20 and the storage tank 20. The stock solution injection pipe 24 is provided with a stock solution injection valve 25 (corresponding to a stock solution input valve) for controlling the amount of stock solution injected into the storage tank 14. The stock solution injection valve 25 is connected to a control unit 13 (corresponding to a stock solution input amount determining unit and a stock solution injection valve control unit), and the control unit 13 can control the opening and closing of the stock solution injection valve 25. The upper end of the stock solution injection pipe 24 is connected to a stock solution storage tank 26 for storing the stock solution.

  The stock solution storage tank 26 has a hollow box shape and can store a stock solution containing microorganisms therein. At the ceiling of the stock solution storage tank 26, a stock solution inlet 27 for feeding the stock solution into the stock solution storage tank 26 is provided. At a position near the bottom of the stock solution reservoir 26, a stock solution reservoir heater 28 for adjusting the stock solution to a temperature suitable for the survival of microorganisms is provided. The stock solution reservoir heater 28 is connected to the control unit 13 and can be controlled by the control unit 13.

  A reflux pipe 29 (corresponding to reflux means) for refluxing water containing microorganisms from the storage tank 14 to the growth tank 20 is attached to the upper part of the left side wall of the growth tank 20. Is open in the breeding tank 20.

  The reflux pipe 29 is substantially L-shaped when viewed from the side, and a horizontal part 30 extending horizontally from the breeding tank 20 to the left and the horizontal part 30 being attached to the breeding tank 20. Consists of a vertical portion 31 extending vertically downward from the opposite end.

  A plurality of openings 32 are provided on the lower wall surface of the horizontal portion 30 of the reflux pipe 29, and water containing microorganisms can flow from these openings 32. Below the horizontal portion 30, the filter 21 is provided so as to occupy substantially the left half of the space above the partition wall 17. The partition wall 17 is provided with an insertion hole 33 directed in the vertical direction at a position near the right end of the region occupied by the filter 21, and the water that has passed through the filter 21 passes through the insertion hole 33 and passes through the partition wall 17. It is possible to flow downward.

  The vertical portion 31 of the reflux pipe 30 is disposed so as to penetrate the filter 21 and the partition wall 17 up and down. A pump 34 (corresponding to reflux means) for pumping up water containing microorganisms is attached to the lower end portion of the vertical portion 31 of the reflux pipe 30, and this pump 34 has a height substantially the same as that of the third water level sensor 18C. Is arranged.

  As shown in FIG. 2, an electrical configuration for controlling each of the operating elements such as the solenoid valves 12, 16, 25, the heaters 19, 28, and the water level sensors 18A, 18B, 18C is as shown in FIG. And only a control unit 13 provided with a microcomputer.

  The control unit 13 is connected to a condition setting switch 35 (shown only in FIG. 2) corresponding to the water discharge valve opening condition setting means, and is set by the user and is used to discharge the water containing microorganisms to the septic tank and the discharge amount. Is provided and stored in the storage device 37 (shown only in FIG. 2). The control unit 13 opens and closes the microorganism-containing liquid discharge valve 12 based on a signal supplied from the timer 36 (shown only in FIG. 2) and the conditions stored in the storage device 37, thereby supplying water containing microorganisms to a predetermined level. A predetermined amount is discharged into the septic tank at each time interval.

  The control unit 13 is connected to first to third water level sensors 18A, 18B, and 18C for detecting the water level in the storage tank 14, and the control unit 13 is given information about the water level in the water storage tank 14. The control unit 13 opens and closes the raw water supply valve 16 based on these pieces of information to supply water at a predetermined water level into the storage tank 14. Further, the control unit 13 energizes the storage tank heater 19 to heat the water in the storage tank 14, thereby maintaining the water in the storage tank 14 at a water temperature suitable for the growth of microorganisms.

  Information about the opening time of the raw water supply valve 16 is given to the control unit 13 and accumulated in the control unit 13. Based on these pieces of information, the control unit 13 opens and closes the stock solution supply valve 25 to feed the stock solution from the stock solution storage tank 26 to the storage tank 14. Moreover, the control part 13 maintains the undiluted | stock solution in the undiluted | stock solution storage tank 26 at the water temperature suitable for survival of microorganisms by supplying with electricity to the undiluted | stock solution storage heater 28 and heating the undiluted | stock solution in the undiluted | stock solution storage tank 26.

Next, functions and effects will be described.
When power is supplied to the microorganism growth apparatus 10, various initial settings are made in the control unit 13. The user inputs a time interval for discharging water containing microorganisms from the breeding apparatus 10 to a septic tank (not shown) and a discharge amount per one time using the condition setting switch 35 to the control unit 13. To do. The input condition is stored in the storage device 37 in the control unit 13. Thereafter, the user injects a stock solution containing microorganisms into the stock solution storage tank 26. When the user starts the operation of the proliferation apparatus 10, the control unit 13 opens the stock solution injection valve 25 for a predetermined time, and a predetermined amount of the stock solution is injected into the storage tank 14. The stock solution storage tank heater 28 is energized, and the microorganisms contained in the stock solution are stored in the stock solution storage tank heater 28 at a temperature suitable for survival, and the activity is maintained.

  When the operation of the propagation device 10 is started, the control unit 13 closes the microorganism-containing liquid discharge valve 12 and opens the raw water supply valve 16 to inject raw water not containing microorganisms into the storage tank 14. . The raw water flows down from the water supply pipe 15 and is stored in a space below the partition wall 17. The stock solution previously injected into the storage tank 14 is diluted by the raw water injected into the storage tank 14, and water containing microorganisms starts to accumulate in the storage tank 14. Then, the pump 34 is operated by the control unit 13 and the storage tank heater 19 is energized. The storage tank heater 19 can efficiently grow microorganisms at a temperature suitable for growth.

  The water containing microorganisms pumped up by the pump 34 reaches the horizontal part 30 through the vertical part 31 of the reflux pipe 29, and a part of the water flows down from the opening part 32, and then is filtered by the filter 21. It flows down from the insertion hole 33 and is stored again in the space below the partition wall 17. The other part of the water containing microorganisms is injected into the breeding tank 20 from the end of the horizontal part 30.

  As described above, water containing microorganisms starts to accumulate in the breeding tank 20. Since the porous barley stone 22 is stored in the breeding tank 20, microorganisms settle in the pores of the barley stone 22 and efficiently start to grow. When the water level in the breeding tank 20 rises and is above the upper end of the microorganism-containing liquid transfer pipe 23, the water containing microorganisms overflows and flows down from the opening of the microorganism-containing liquid transfer pipe 23, and the microorganism-containing liquid transfer It is transmitted through the pipe 23 and stored again in the space below the partition wall 17.

  When the water level in the storage tank 14 rises and becomes higher than the second water level sensor 18B, the control unit 13 closes the raw water supply valve 16. In addition, when the discharge amount to the septic tank (not shown) containing the microorganisms is large, the raw water supply valve 16 is controlled to be closed when the water level is higher than the first water level sensor 18A. A large amount of water containing microorganisms can be stored.

  As described above, the water containing microorganisms circulates from the storage tank 14 through the reflux pipe 29, the propagation tank 20, and the microorganism-containing liquid transfer pipe 23 to the storage tank 14. As a result, a water flow from the opening of the reflux pipe 29 to the opening of the microorganism-containing liquid transfer pipe 23 is generated in the breeding tank 14. Then, as a result of the surface of the barley stone 22 being appropriately washed away by the water flow, the microorganism concentration is not excessively increased on the barley stone 22, so that the microbial sludge is prevented. Thereby, microorganisms can be efficiently propagated. Further, when water circulates in the breeding apparatus 10, air is appropriately dissolved in water, so that the growth of microorganisms is promoted. As a result, it is possible to reduce the amount of the stock solution to be supplied for replenishing the microorganisms, so that the cost can be reduced.

  While the water containing microorganisms circulates in the proliferation apparatus 10, the microorganism concentration of the water stored in the storage tank 14 is gradually increased by the microorganisms grown in the growth tank 20. As a result, the storage tank 14 is in a state where water containing a large amount of microorganisms is stored.

  Based on the signal output from the timer 36, the control unit 13 opens the microorganism-containing liquid discharge valve 12 for a predetermined time in accordance with the conditions stored in the storage device 37. Then, water containing microorganisms is introduced from the storage tank 14 into the purification tank (not shown) through the microorganism-containing liquid discharge pipe 11. In this way, since the step of introducing microorganisms into the septic tank (not shown) can be automated by the control unit 13, labor saving can be achieved. Further, since the input amount of microorganisms can be input in advance in consideration of the degree of contamination of wastewater to be treated and the treatment capacity of a septic tank (not shown), the breeding apparatus 10 can be operated efficiently. Furthermore, the treatment capacity of the septic tank (not shown) can be improved by introducing water containing a large amount of microorganisms into the septic tank (not shown).

  When a predetermined amount of water containing microorganisms is discharged, the water level in the storage tank 14 is lowered. When the second water level sensor 18B detects that the water level in the storage tank 14 is lower than the second water level sensor 18B, the control unit 13 opens the raw water supply valve 16, and the raw water passes through the water supply pipe 15. And supplied to the storage tank 14. The raw water supplied from the water supply pipe 15 flows down from the water supply pipe 15 and accumulates in the storage tank 14, and the water level rises. When the second water level sensor 18B detects that the water level in the storage tank 14 is higher than the second water level sensor 18B, the control unit 13 closes the raw water supply valve 16 and enters the raw water storage tank 14. Supply stops. Thus, since the amount of raw water supplied into the storage tank 14 can be efficiently controlled by the second water level sensor 18B and the control unit 13, labor saving and cost reduction can be achieved.

  When raw water not containing microorganisms is supplied into the storage tank 14, the amount of water in the storage tank 14 is kept constant, but the concentration of microorganisms in the storage tank 14 decreases. However, since the microorganisms grow in the breeding tank 20 while the water containing the microorganisms circulates between the breeding tank 20 and the storage tank 14, the microorganism concentration is recovered. As a result, a certain amount of water containing a large amount of microorganisms can be stored in the growth apparatus 10. Thereby, even when the purification capacity of the septic tank (not shown) is insufficient, water containing microorganisms can be constantly supplied from the breeding apparatus 10, so that the purification capacity of the septic tank (not shown) can be improved.

  The time when the raw water supply valve 16 is opened is accumulated in the control unit 13. The supply amount of the raw water is calculated from the accumulated time, and the control unit 13 determines the amount of the raw solution to be introduced into the storage tank 14 based on the supply amount. The controller 13 determines the opening time of the stock solution injection valve 25 from the input amount of the stock solution, and opens the stock solution injection valve 25 for a predetermined time. Then, the stock solution is injected from the stock solution storage tank 26 through the stock solution injection pipe 24 into the storage tank 14. In this way, the control unit 13 determines the supply amount of the stock solution, and further controls the stock solution injection valve 25, so that labor can be saved. Further, since the supply amount of the stock solution can be controlled efficiently, the consumption amount of the stock solution can be reduced, and the cost can be reduced.

In order to confirm the effect of this embodiment, the following experiment was conducted. The present invention is not limited to the following examples.
<Example 1>
(Waste oil decomposition ability test)
As the microorganism growth device (hereinafter referred to as device A) used in Example 1, the growth device 10 according to the above-described embodiment was used. The microorganism-containing liquid discharge pipe 11 of the apparatus A was connected to a grease strap (not shown). A grease-like aqueous solution containing 50% by weight of waste oil obtained by pulverizing and mixing used tempura oil and beef tallow was injected into the grease trap, assuming kitchen drainage. The apparatus A was operated and water containing microorganisms was stored in the storage tank 14. Water containing microorganisms thus prepared was injected into the grease trap, and the state of decomposition of the waste oil was observed. The water containing the microorganisms was injected into the grease trap twice a day at intervals of 6 hours, and the injection amount per injection was 5 L. When the apparatus A of Example 1 was used, it took one day until the waste oil settled on the grease trap as a decomposition residue and the supernatant became colorless and transparent.

(Stock solution input amount comparison test)
In addition, 100 L of waste oil per day was poured into the grease trap and continuously decomposed, and the amount of the stock solution added to the storage tank 14 at this time was examined. The water containing the microorganisms was injected into the grease trap twice a day at intervals of 6 hours, and the injection amount per injection was 5 L. However, the input amount of the stock solution to the storage tank 14 is not controlled by the control unit 13 and is determined based on whether or not the supernatant liquid of the grease trap becomes transparent, and the user operates the stock solution injection valve 25. A predetermined amount was charged into the storage tank 14. The stock solution was added once a week, and the input amount per time was 10 mL.

<Comparative Example 1>
(Waste oil decomposition ability test)
As a microorganism growth apparatus (hereinafter referred to as apparatus B) of Comparative Example 1, a structure in which the pump 34 is not operated in the growth apparatus 10 according to the above-described embodiment was used. As a result, the stock solution introduced from the stock solution feeding pipe 24 is only diluted with the water in the storage tank 14, and unlike the apparatus A of the first embodiment, the microorganisms cannot efficiently grow. Yes. Except for this, the waste oil decomposition ability test was conducted in the same manner as in Example 1. When the apparatus B of Comparative Example 1 was used, it took 3 days until the waste oil settled on the grease trap as a decomposition residue and the supernatant became colorless and transparent.

(Stock solution input amount comparison test)
A stock solution input amount comparison test was performed in the same manner as in Example 1 except that the apparatus B of Comparative Example 1 was used. The stock solution required daily addition and the additional volume per time was 10 mL.

<Result>
(Waste oil decomposition ability test)
In the apparatus B of Comparative Example 1 as well, the ability to decompose the waste oil was recognized for some time because water diluted with a stock solution containing microorganisms was injected into the grease trap, and it took 3 days for the supernatant to become colorless and transparent. On the other hand, in the apparatus A of Example 1, since the water containing microorganisms is configured to circulate from the storage tank 14 to the storage tank 14 via the growth tank 20, the microorganisms can be efficiently propagated. As a result, the supernatant is colorless. It only took one day to become transparent. Thus, the resolution of the waste oil in the grease wrap can be improved by the apparatus A of the first embodiment.

(Stock solution input amount comparison test)
In the apparatus B of Comparative Example 1, the waste oil could not be processed unless 10 mL of the stock solution was added every day. On the other hand, in the apparatus A of Example 1, the waste oil could be treated only by adding 10 mL of the stock solution once per week. As described above, when the apparatus A of Example 1 is used, microorganisms can be efficiently propagated. As a result, the replenishment amount of expensive stock solution can be reduced, and the cost can be reduced.

Second Embodiment
A second embodiment according to the present invention will be described with reference to FIG. The difference from the first embodiment is that the water supply pipe 15 is configured to open to the ceiling of the storage tank 14 and the stock solution injection pipe 24 is configured to open to the ceiling of the breeding tank 20. Others are the same as in the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the second embodiment, since the water supply pipe 15 opens to the ceiling portion of the storage tank 14, when the raw water supply valve 16 is opened, the raw water flows down from the water supply pipe 15 onto the filter 21 and is filtered by the filter 21. Then, it flows down from the insertion hole 33 to the space below the partition wall 17. Thus, according to said structure, since the raw | natural water filtered by the filter 21 can be used, as a result of removing foreign substances etc. harmful to microorganisms beforehand, microorganisms can be efficiently propagated.

  In the second embodiment, since the stock solution injection pipe 24 is open to the ceiling of the growth tank 20, the stock solution flows down from the stock solution injection pipe 24 into the growth tank 20 when the stock solution injection valve 25 is opened. For this reason, immediately after the operation of the microorganism growth apparatus 10 is started, the stock solution is in a high concentration in the growth tank 20. When the operation of the microorganism growth apparatus 10 is started, the raw water (not yet containing microorganisms) that has started to accumulate in the space below the partition wall 17 of the storage tank 14 is pumped up by the pump 34 and passes through the reflux pipe 29. Then, it is injected into the growth tank 20. The stock solution containing microorganisms is diluted by the raw water injected into the growth tank 20, and the microorganisms are adsorbed on the barley stone 22 and start to efficiently grow. Thus, since the undiluted | stock solution injection pipe 24 is opening in the ceiling part of the breeding tank 20, since the microorganisms exist in the breeding tank 20 from the time of the operation start of the microorganism breeding apparatus 10 in high concentration. The microorganisms can be efficiently propagated in the growth tank 20.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In the present embodiment, the storage tank 14 is vertically divided by the partition wall 17 and the breeding tank 20 is provided in the space above the partition wall 17. It is good also as what arrange | positions the breeding tank 20 and comprises the storage tank 14 and the breeding tank 20 separately.

  (2) In this embodiment, the filter 21 is provided below the horizontal portion 30 of the reflux pipe 29, and water containing microorganisms is allowed to flow down from the opening 32 provided in the horizontal portion 30 and then passed through the filter 21. However, the present invention is not limited to this, and the opening 32 may not be provided in the horizontal portion 30 and all the water containing the microorganisms pumped by the pump 34 may be injected into the breeding tank 20.

  (3) Although the storage tank heater 19 and the stock solution storage tank heater 28 are provided in the present embodiment, the present invention is not limited to this, and the storage tank heater 19 or the stock solution storage tank heater 28 may not be provided.

  (4) In the present embodiment, the water supply pipe 15 is connected to the storage tank 14. However, the present invention is not limited to this, and the water supply pipe 15 may be connected to the breeding tank 20. Moreover, it is good also as a structure which connects the water supply pipe | tube 15 to both the storage tank 14 and the breeding tank 20. FIG.

  (5) In the first embodiment, the stock solution injection tube 24 is configured to open to the storage tank 14, and in the second embodiment, the stock solution injection tube 24 is configured to open to the breeding tank 20. The tube 24 may be configured to open to both the storage tank 14 and the breeding tank 20.

  (6) In the present embodiment, the first to third total water level sensors 18A to 18C are provided in the storage tank 14, but the present invention is not limited to this, and one, two, or four or more water level sensors are provided. It is good also as a structure which provides.

  (7) In the present embodiment, the time and frequency of opening the stock solution injection valve 25 are determined based on the supply amount of raw water calculated from the accumulated time that the raw water supply valve 16 is opened, but are not limited thereto. The discharge amount of water containing microorganisms calculated from the accumulated time when the microorganism-containing liquid discharge valve 12 is opened, the supply amount of raw water and the discharge of the microorganism-containing liquid calculated from the accumulated time when the raw water supply valve 16 is opened It is good also as what is determined from the correlation of the discharge amount of the water containing the microorganisms calculated from the integration time when the valve 12 is opened. In addition, the amount of raw water supplied from the water supply pipe 15 is measured using a flow meter, a mass flow meter, etc., and the time and frequency of opening the stock solution injection valve 25 are determined from the amount of raw water supplied thereby. Alternatively, the amount of water containing microorganisms discharged from the microorganism-containing liquid discharge pipe 11 may be measured in the same manner, and may be determined from the discharge amount obtained thereby. You may determine from the correlation with the measured value of the discharge amount of the water containing microorganisms.

  (8) In the present embodiment, the microorganism-containing liquid discharge valve 12 and the raw water supply valve 16 of the microorganism growth apparatus 10 are controlled by the control unit 13. However, the present invention is not limited to this, and the user can use the microorganism-containing liquid. Various devices such as the discharge valve 12 and the raw water supply valve 16 may be operated.

Schematic which shows the growth apparatus of the microorganisms which concern on 1st Embodiment of this invention. The block diagram which shows the outline of control of the growth device of the same microorganism Schematic which shows the growth apparatus of the microorganisms concerning 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Growth apparatus 13 ... Control part 14 ... Storage tank 20 ... Growth tank 22 ... Barley stone 23 ... Microorganism containing liquid transfer pipe 29 ... Reflux pipe 34 ... Pump

Claims (4)

A breeding tank containing a porous material for storing water and allowing microorganisms to settle and grow;
A microorganism transfer means for transferring water containing the microorganisms derived from the growth tank;
A storage tank connected to the microorganism transfer means and storing water containing the microorganisms;
A reflux means for refluxing water containing the microorganisms from the storage tank to the growth tank;
Microorganism release means for releasing water containing the microorganisms from the storage tank;
Water injection means for injecting water into the storage tank or the breeding tank in order to replenish water in the storage tank released by the microorganism release means;
A microorganism growth apparatus comprising a stock solution input means for supplying a stock solution containing the microorganism to the storage tank or the growth tank. The microorganism growth apparatus according to claim 1,
The microorganism release means is provided with a water discharge valve that can be opened and closed by an electrical signal,
A water discharge valve opening condition setting means for setting a time interval for opening the water discharge valve and a water discharge amount of the water containing the microorganisms;
A storage device for storing the conditions set by the water discharge valve opening condition setting means;
A timer for timing the time interval for opening the water discharge valve;
Based on the signal output from the timer, according to the conditions stored in the storage device, the water discharge valve is opened every predetermined time so that a predetermined amount of water containing the microorganisms is discharged from the storage tank. A microorganism growth apparatus, comprising: a water discharge valve control means for controlling. The microorganism growth apparatus according to claim 1 or 2,
The water injection means is provided with a water injection valve that can be opened and closed by an electrical signal,
Water level detection means provided in the storage tank to detect the water level in the storage tank;
When the water level detected by the water level detection means falls below a predetermined water level, the water injection valve is opened to inject water up to a predetermined water level, so that water at a predetermined water level is stored in the storage tank. An apparatus for growing microorganisms, comprising: a water injection valve control means for controlling the water injection valve. The microorganism growth apparatus according to any one of claims 1 to 3,
The stock solution charging means is provided with a stock solution supply valve that can be opened and closed by an electrical signal,
A water discharge amount detection means for detecting the water discharge amount of the water containing the microorganisms released from the storage tank, or a water injection amount detection means for detecting the water injection quantity injected into the storage tank or the breeding tank;
A stock solution input amount determination means for determining the input amount of the stock solution based on the water discharge amount detected by the water discharge amount detection means or the water injection amount detected by the water injection amount detection means;
In accordance with the stock solution input amount determined by the stock solution input amount determination means, a stock solution input valve control means for controlling the stock solution input valve so that a predetermined amount of stock solution is supplied to the storage tank or the growth tank. A microorganism growth apparatus characterized by comprising:

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