JP3936564B2 - Apparatus for improving existing livestock wastewater storage tank and method for improving the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement device for an existing livestock wastewater storage tank including a storage tank in which livestock wastewater is stored and aeration means for aeration of livestock wastewater stored in the storage tank, and a method for improving the same .
[0002]
[Prior art]
Conventionally, small and medium-sized livestock farmers have stored livestock wastewater, which is drainage from which solids have been removed from the excreta as livestock excretion excreted from livestock such as cattle and pigs raised by these livestock farmers. The livestock wastewater stored in the urine reservoir is aerated by aeration means such as a blower, and the livestock wastewater is liquefied. Or deodorizing.
[0003]
And the livestock wastewater stored in this urine storage tank is sucked out by vacuum etc. at regular intervals, and the livestock wastewater processed in the urine storage tank is sprayed and used as liquid manure on farmland etc. Or dispose of it.
[0004]
However, it takes a lot of money to dispose of livestock wastewater at a processing company, and it takes a lot of time to fully fertilize livestock wastewater, and there is no use of liquid fertilizer generated from livestock wastewater. There is a problem.
[0005]
In addition, in order to change the existing urine storage tank to a wastewater treatment facility, the livestock wastewater stored in the urine storage tank is withdrawn in order to renovate the urine storage tank, or the livestock drainage to this urine storage tank is removed. Since the inflow must be temporarily stopped, it is not easy to improve the processing capacity of the urine tank.
[0006]
[Problems to be solved by the invention]
As described above, in order to improve the processing capacity of livestock wastewater using the existing urine tank, it is necessary to spend a great deal of time and money, so it is easy to improve the processing capacity of livestock wastewater using this existing urine tank. It has a problem of not.
[0007]
This invention is made in view of such a point, and it aims at providing the improvement apparatus of the existing livestock wastewater storage tank which can improve the processing capacity of the livestock wastewater by the existing livestock wastewater storage tank, and its improvement method To do.
[0008]
[Means for Solving the Problems]
The apparatus for improving an existing livestock wastewater storage tank according to claim 1 includes a tank body in which livestock wastewater is stored, aeration means for aeration of livestock wastewater stored in the tank body, and the livestock wastewater flowing into the tank body An apparatus for improving an existing livestock wastewater storage tank provided with an inflow pipe , wherein a membrane separation tank into which livestock wastewater stored in the tank body flows, and a livestock wastewater that has flowed into the membrane separation tank are subjected to membrane separation and membrane separation means for, comprising a sludge return means to return your sludge of the membrane separation tank to the inlet pipe, and a supply means for supplying ozone into the sludge that is returned by this sludge return means, the sludge returning means, the ozone is supplied sludge by the membrane is sucked from the separation tank in the supply means, it is intended to return to the inlet pipe.
[0009]
The method for improving an existing livestock wastewater storage tank according to claim 2 is a tank body in which livestock wastewater is stored, an aeration means for aeration of livestock wastewater stored in the tank body, and the livestock wastewater flowing into the tank body A method for improving an existing livestock wastewater storage tank provided with an inflow pipe, wherein a membrane separation tank into which livestock wastewater stored in the tank body is introduced is provided, and the livestock wastewater flowing into the membrane separation tank is formed into a membrane A membrane separation means for separating, a sludge return means for returning sludge in the membrane separation tank to the inflow pipe, a supply means for supplying ozone to the sludge returned by the sludge return means, The sludge sucked out from the separation tank and supplied with ozone by the supply means is returned to the inflow pipe by the sludge return means.
[0010]
Then, the livestock wastewater stored in the tank body of the existing livestock wastewater storage tank and aerated by the aeration means of the existing livestock wastewater storage tank is caused to flow into the membrane separation tank, and the livestock wastewater that has flowed into the membrane separation tank is converted into a membrane. The membrane is separated by a separation means. At this time, sludge is generated in the membrane separation tank by membrane separation of livestock wastewater by the membrane separation means. Therefore, the sludge is returned to the tank body by the sludge return means, and ozone is supplied to the sludge returned by the sludge return means by the supply means. As a result, the livestock wastewater stored in the existing livestock wastewater storage tank is processed more efficiently. In addition, without removing the livestock wastewater stored in the tank body of the existing livestock wastewater storage tank or stopping the storage of livestock wastewater in this tank body, this existing livestock wastewater storage tank can be equipped with a membrane separation tank, membrane Since each of the separation means, the sludge return means and the supply means is attached, the processing capacity of livestock wastewater by this existing livestock wastewater storage tank is easily improved.
[0011]
In addition, since the supply means supplies ozone to the sludge returned by the sludge return means, the hardly decomposable substances contained in the livestock wastewater stored in the tank body of the existing livestock wastewater storage tank are further decomposed by ozone. Since it becomes easy, the processing capacity of the livestock wastewater by this existing livestock wastewater storage tank is improved more.
[0012]
Furthermore, by returning sludge containing ozone to the inflow pipe through which livestock wastewater flows into the tank body, high-concentration refractory substances contained in the raw water of livestock wastewater flow into the tank body and diffuse. It comes in contact with ozone in a higher concentration state before it is done. For this reason, oxidative decomposition and deodorization of livestock wastewater are promoted more effectively, and generation of urine stones and scales can be prevented.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of an embodiment related to the improvement device for an existing livestock wastewater storage tank of the present invention will be described with reference to FIGS. 1 and 2.
[0014]
1 and 2, reference numeral 1 denotes a urine storage tank as an existing livestock drainage storage tank. This urine storage tank 1 is already installed on the grounds of small and medium-sized livestock farmers, and cattle and pigs raised by this livestock farmer. The livestock wastewater D, which is wastewater from which solid content has been removed with a screen, is introduced into the excreta excreted from livestock such as livestock excreta, and the livestock wastewater D is stored and purified. Further, as shown in FIG. 2, the urine storage tank 1 includes a tank body 2 in which livestock wastewater D is stored, and the livestock wastewater D flows into the tank body 2 into the tank body 2. An inflow pipe 3 is attached. As a result, at the downstream end of the inflow pipe 3, an inflow port 4 through which the livestock wastewater D flows into the tank body 2 is formed.
[0015]
The tank body 2 is provided with an aeration device 5 as aeration means for liquid fertilizing and deodorizing the livestock wastewater D stored in the tank body 2.
[0016]
The air diffuser 5 is provided on a bottom surface in the tank body 2 and includes an air diffuser disk 6 as a substantially disk-shaped air diffuser that substantially closes the bottom surface. A blower 7 serving as an air supply means for supplying air to the diffuser disk 6 is connected to the diffuser disk 6 via an air diffuser 8. A check valve (not shown) that prevents the backflow of air passing through the inside of the air diffuser 8 is attached to an intermediate region of the air diffuser 8.
[0017]
On the other hand, in the existing urine reservoir 1, the urine reservoir 1 is collected without removing the livestock drainage D stored in the tank body 2 of the urine reservoir 1, and further without demolishing the urine reservoir 1. The improvement device 11 as a new additional equipment is installed later to improve the processing capacity of the livestock wastewater D stored in the tank body 2 of 1 and make the treated water of the livestock wastewater D below the discharge regulation value. Yes.
[0018]
As shown in FIG. 1, the improvement device 11 includes a membrane separation tank 12 into which livestock wastewater D biologically treated in the urine storage tank 1 flows and the livestock wastewater D is stored. The membrane separation tank 12 is arranged in parallel with the tank body 2 of the urine reservoir 1. In addition, when a predetermined amount of livestock wastewater D is stored in the tank body 2 between the tank body 2 and the membrane separation tank 12, a part of the livestock increased from the predetermined amount in the livestock wastewater D. An overflow section 13 is attached as overflow means for allowing the drainage D to overflow into the membrane separation tank 12.
[0019]
Further, the membrane separation tank 12 is aerated by aeration of the livestock wastewater D flowing into the membrane separation tank 12 to improve the amount of dissolved oxygen in the livestock wastewater D and biologically treating the livestock wastewater D. As a diffuser 14 is attached. In addition, the air diffuser 14 discharges air fed by a blower 16 described later into the livestock wastewater D in the membrane separation tank 12, thereby allowing the sludge M to be applied to the separation membrane 23 of the membrane separator 21 described later. Prevent adhesion.
[0020]
The diffuser disk 15 of the diffuser 14 is installed on the bottom surface in the membrane separation tank 12. A blower 16 serving as an air supply means for supplying air to the diffuser disk 15 is connected to the diffuser disk 15 via an air diffuser 17. A check valve (not shown) that prevents the backflow of air passing through the air diffuser 17 is attached to an intermediate region of the air diffuser 17.
[0021]
Further, in the membrane separation tank 12, a membrane separation device 21 is attached as a membrane separation means for processing livestock wastewater D flowing into the membrane separation tank 12 by membrane separation. The membrane separation device 21 filters the solid content in the livestock wastewater D in the membrane separation tank 12. Further, the membrane separation device 21 is disposed at a substantially central portion in the membrane separation tank 12. The membrane separation device 21 is provided with a discharge pipe 22 for discharging treated water as membrane separation water separated by the membrane separation device 21 to a river or the like.
[0022]
Further, the membrane separation device 21 is provided with a separation membrane 23 for membrane separation of livestock wastewater D flowing into the membrane separation tank 12. In the separation membrane 23, a large number of holes having a hole diameter of 0.45 μm or less are formed.
[0023]
Further, the membrane separation tank 12 sucks out the sludge M concentrated when the livestock wastewater D flowing into the membrane separation tank 12 is subjected to membrane separation, and returns the sludge M to the tank body 2 of the urine storage tank 1. The sludge returning means 24 is attached. The sludge return means 24 includes an elongated cylindrical sludge return pipe 25 having an inflow side communicating with the lower side of the outer surface of the membrane separation tank 12. The outflow side of the sludge return pipe 25 is located above the tank body 2 of the urine storage tank 1, and the sludge M sent to the outflow side of the sludge return pipe 25 is stored in the tank body 2 of the urine storage tank 1. Return to the inside.
[0024]
Here, the sludge returning means 24 is used to maintain the activation of high-concentration microorganisms in the livestock wastewater D flowing into the membrane separation tank 12, and the concentration of the activated sludge M in the livestock wastewater D in the membrane separation tank 12 (Mixed Liquor Suspended Solids: MLSS) is set to about 15000 mg / l.
[0025]
Further, a sludge return pump 26 for sucking out the sludge M accumulated on the bottom surface of the membrane separation tank 12 using the sludge return pipe 25 is attached to an intermediate portion of the sludge return pipe 25. Further, an ejector 27 that is a sludge aeration means as a supply means for supplying air to the sludge M passing through the sludge return pipe 25 is attached to the sludge return pipe 25 downstream of the sludge return pump 26. . The ejector 27 has an introduction port 28 through which air is introduced from the outside into the sludge return pipe 25. Further, the ejector 27 helps the aeration of the livestock wastewater D in the tank body 2 by the air diffuser 5 and improves the dissolved oxygen amount of the livestock wastewater D.
[0026]
Next, the improvement method of the existing urine reservoir of the related embodiment will be described.
[0027]
First, the membrane separation tank 12 is constructed adjacent to the tank body 2 of the existing urine tank 1 shown in FIG.
[0028]
Then, an overflow section 13 is formed between the membrane separation tank 12 and the tank body 2, and a sludge return means 24 is attached to the membrane separation tank 12.
[0029]
Thereafter, the aeration device 14 is attached to the membrane separation tank 12, and the membrane separation device 21 is attached to construct the livestock wastewater treatment facility shown in FIG.
[0030]
Next, the processing method of the livestock wastewater of the said related embodiment is demonstrated.
[0031]
First, livestock wastewater D is stored in the tank body 2 of the urine storage tank 1 from the inflow pipe 3 only from the urine separated from the solid content of excrement such as livestock.
[0032]
Then, the livestock wastewater D stored in the tank body 2 is aerated by the aeration device 5 in the tank body 2, and the amount of dissolved oxygen in the livestock wastewater D is improved to be biologically treated.
[0033]
When the liquid level of the livestock wastewater D stored in the tank body 2 rises from the overflow section 13, a part of the livestock wastewater D overflows from the overflow section 13 into the membrane separation tank 12 and this membrane. It flows into the separation tank 12.
[0034]
Then, the livestock wastewater D that has flowed into the membrane separation tank 12 is further aerated in the membrane separation tank 12 by the air diffuser 14, and the amount of dissolved oxygen in the livestock wastewater D is improved so that the biological treatment can be performed. Promoted.
[0035]
Further, the livestock wastewater D flowing into the membrane separation tank 12 is subjected to membrane separation by the membrane separation device 21. Then, the treated water membrane-separated by the membrane separation device 21 is discharged into a river or the like through a discharge pipe 22.
[0036]
In addition, the sludge M is precipitated at the bottom of the membrane separation tank 12 by the membrane separation of the livestock wastewater D by the membrane separation device 21. This sludge M is returned to the tank body 2 of the urine reservoir 1 by the sludge return means 24. At this time, air is taken into the sludge M flowing in the sludge return pipe 25 by the ejector 27 of the sludge return means 24, and dissolved oxygen in the livestock wastewater D in the tank body 2 of the urine reservoir 1 to which this sludge M is returned. Improve the amount.
[0037]
As described above, according to the related embodiment, the livestock wastewater D stored in the tank body 2 of the existing urine tank 1 is removed, or the storage of the livestock wastewater D in the tank body 2 is stopped. Therefore, the improvement device 11 can be added to the downstream side of the existing urine storage tank 1, so that the existing urine storage tank 1 can be used as it is, and the livestock wastewater stored in the tank body 2 of the urine storage tank 1 is used. The treatment capacity of D can be easily improved and improved, and this improvement device 11 can discharge the treated water of livestock wastewater D stored in the tank body 2 of the urine tank 1 to a river or the like. Therefore, it is not necessary to pump the livestock wastewater D stored in the tank body 2 of the urine storage tank 1 with vacuum or the like and to spray it on farmland in the name of using it as liquid fertilizer.
[0038]
Moreover, since the livestock wastewater D stored in the tank body 2 of the urine tank 1 is flowed into the membrane separation tank 12 and membrane-separated by the membrane separation device 21, the livestock wastewater stored in the tank body 2 of the urine tank 1 is stored. Compared with the case where D is further processed by a method other than membrane separation, it can be changed to a good livestock wastewater treatment facility with minimum facilities. Therefore, since the improvement device 11 is compact and easy to install, the improvement workability of the existing urine reservoir 1 can be improved.
[0039]
Furthermore, the sludge return pipe 25 is connected to the membrane separation tank 12, an ejector 27 is attached to the sludge return pipe 25, and air is taken into the sludge M passing through the sludge return pipe 25, so that the existing urine is collected. The air diffuser 8 and the blower 7 of the air diffuser 5 provided in the reservoir 1 are modified so that the efficiency of the air diffused by the air diffuser 5 is not improved and stored in the tank body 2 of the urine reservoir 1. The amount of dissolved oxygen in the livestock wastewater D can be improved to an appropriate value.
[0040]
Next, the configuration of an embodiment of the present invention will be described with reference to FIG.
[0041]
The improvement device 11 shown in FIG. 2 is basically the same as the improvement device 11 shown in FIGS. 1 and 2, except that the downstream end of the sludge return pipe 25 is connected to the inflow pipe 3 of the upstream urine reservoir 1. The sludge M precipitated in the membrane separation tank 12 is returned to the inflow pipe 3 by being connected.
[0042]
Further, an ozone generator (not shown) is connected to the inlet 28 of the ejector 27 connected to the sludge return pipe 25 of the sludge return means 24, and ozone (O ₃ ) generated by this ozone generator is The sludge is brought into contact with the sludge M passing through the sludge return pipe 25.
[0043]
As a result, in the improvement device 11 shown in FIG. 2, the livestock wastewater D overflowed from the tank body 2 of the urine storage tank 1 in the overflow section 13 flows into the membrane separation tank 12, and enters the membrane separation tank 12. The inflow of livestock wastewater D is separated by the membrane separation device 21 and the sludge M generated by the membrane separation by the membrane separation device 21 is returned to the tank body 2 of the urine storage tank 1 by the sludge return means 24. Therefore, the same operational effects as the improvement device 11 shown in FIGS. 1 and 2 can be obtained.
[0044]
Further, the downstream end of the sludge return pipe 25 is connected to the inflow pipe 3 of the urine storage tank 1, and the sludge M returned by the sludge return pipe 25 is returned further upstream, whereby the tank of the urine reservoir 1 is obtained. Since the amount of dissolved oxygen in the livestock wastewater D stored in the main body 2 can be further improved, the treatment of the livestock wastewater D by the tank body 2 can be made more efficient, and the processing capacity of the livestock wastewater D by the existing urine reservoir 1 can be increased. It can be improved.
[0045]
In addition, the ozone generated by the ozone generator is taken into the sludge M passing through the sludge return pipe 25, so that it is stored in the tank body 2 of the urine storage tank 1 by the strong oxidizing action of this ozone. Since the hardly decomposable substance contained in the livestock wastewater D is more easily decomposed, the processing capacity of the livestock wastewater D by the urine storage tank 1 can be further improved.
[0046]
That is, by returning the sludge M containing ozone to the inflow pipe 3 of the urine storage tank 1, the high-concentration hardly decomposable substance contained in the raw water of the livestock wastewater D is contained in the tank body 2 of the urine storage tank 1. Since it comes into contact with ozone in a higher concentration before it flows into and diffuses, it can more effectively promote oxidative degradation and deodorization of the livestock wastewater D, and urine stones to the urine tank 1 and the improvement device 11 And scale can be prevented.
[0047]
In each of the above embodiments, the livestock wastewater D stored in the tank body 2 of the urine tank 1 is overflowed to the membrane separation tank 12 at the overflow section 13. The livestock wastewater D stored in 2 may be sent to the membrane separation tank 12 by pumping up or the like.
[0048]
Further, although the sludge return pump 26 and the ejector 27 are configured as separate bodies, the sludge return pump 26 and the ejector 27 may be configured as a single unit.
[0049]
【The invention's effect】
According to the improvement device of the existing livestock drainage storage tank according to claim 1 and the improvement method of the existing livestock drainage storage tank according to claim 2 , the tank is stored in the tank body of the existing livestock drainage storage tank. When the livestock wastewater aerated by the aeration means flows into the membrane separation tank and the livestock wastewater flowed into the membrane separation tank is separated by the membrane separation means, the membrane separation tank is separated by the membrane separation of the livestock wastewater by the membrane separation means. If sludge is returned to the tank body by the sludge return means and ozone is supplied to the sludge returned by the sludge return means, the sludge is stored in the existing livestock wastewater storage tank. The livestock wastewater can be treated more efficiently, and the existing livestock wastewater can be treated without removing the livestock wastewater stored in the tank body of the existing livestock wastewater storage tank or stopping the storage of livestock wastewater in the tank body. Wastewater storage The membrane separation tank, the membrane separation unit, since each sludge return means and supply means are attached, the processing capacity of the livestock waste water according to the existing livestock waste water reservoir can be easily improved.
[0050]
In addition, if ozone is supplied by the supply means to the sludge returned by the sludge return means, the hardly decomposable substances contained in the livestock wastewater stored in the tank body of the existing livestock wastewater storage tank are further decomposed by ozone. Since it becomes easy to be done, the processing capacity of livestock wastewater by this existing livestock wastewater storage tank can be improved more.
[0051]
Furthermore, by returning sludge containing ozone to the inflow pipe through which livestock wastewater flows into the tank body, high-concentration refractory substances contained in the raw water of livestock wastewater flow into the tank body and diffuse. Since it comes into contact with ozone in a higher concentration state before it is consumed, the oxidative decomposition and deodorization of livestock wastewater can be promoted more effectively, and the occurrence of urine stones and scales can be prevented.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a related embodiment of an improvement device for an existing livestock wastewater storage tank of the present invention.
FIG. 2 is an explanatory view showing an existing livestock drainage storage tank as described above.
FIG. 3 is an explanatory diagram showing an improvement device for an existing livestock wastewater storage tank according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Urine reservoir tank as existing livestock drainage storage tank 2 Tank main body 3 Inflow pipe 5 Aeration device as aeration means
11 Improvement device
12 Membrane separation tank
21 Membrane separation device as membrane separation means
24 Sludge return means
27 Ejector as supply means D Livestock drainage M Sludge

Claims (2)

An apparatus for improving an existing livestock wastewater storage tank, comprising a tank body in which livestock wastewater is stored, aeration means for aeration of livestock wastewater stored in the tank body, and an inflow pipe for allowing livestock wastewater to flow into the tank body Because
A membrane separation tank into which livestock wastewater stored in the tank body flows,
Membrane separation means for membrane separation of livestock wastewater flowing into the membrane separation tank;
And sludge return means to return your sludge of the membrane separation tank to the inlet pipe,
This sludge is sent back by the sludge return means comprise a supply means for supplying ozone,
It said sludge return means, the membrane is sucked from the separation tank the sludge ozone is supplied at a delivery unit, improving apparatus existing livestock wastewater storage tank which is characterized in that is returned to the inlet pipe. A method for improving an existing livestock wastewater storage tank comprising a tank body in which livestock wastewater is stored, aeration means for aeration of livestock wastewater stored in the tank body, and an inflow pipe for allowing livestock wastewater to flow into the tank body Because
Provide a membrane separation tank into which livestock wastewater stored in the tank body flows,
Membrane separation means for membrane separation of livestock wastewater flowing into this membrane separation tank is provided,
Providing a sludge return means for returning the sludge in the membrane separation tank to the inflow pipe;
A supply means for supplying ozone to the sludge returned by this sludge return means is provided.
The sludge sucked out from the membrane separation tank and supplied with ozone by the supply means is returned to the inflow pipe by the sludge return means.
The improvement method of the existing livestock drainage storage tank characterized by this.

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