JP2000354482A - Activator for useful microorganism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an activator for a useful microorganism capable of easily throwing a solid filler into an inner container without outflow of the solid filler, excellent in dewaterability of obtained sludge, completely free from odor of the sludge and free from emission of odor in the case of using in batch tanks, etc. SOLUTION: In this activator for a useful microorganism comprising an inner container 2 installed in a vertical container main body 1 which has an inflow port 12 to flow a material to be treated inwards and an output port 13 to take out the treated useful microorganism mainly, through proper space S to the inner wall of the container main body 1, a solid filler P filled into the inner container 2 to proliferate the useful microorganism and to set priority in the proliferation or to retain the proliferation and the priority or to activate the useful microorganism or to retain the activity and an air diffuser 3 at the lower part of the inner container 2 and made in such a way that the upper part of the inner container 2 is opened and the lower part is capable of supporting the solid filler P and air from the air diffuser 3 can be introduced into the lower part, a slit part 2b is formed at the upper part of the inner container 2 and the bottom of the slit part 2b is located under the liquid level W of the material to be treated and the top of the slit part is protruded from the liquid level W.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for activating useful microorganisms, and more particularly, to growing and prioritizing useful microorganisms.
Also, the present invention relates to an apparatus for activating useful microorganisms which maintains them, activates useful microorganisms, or maintains the activation.

[0002]

2. Description of the Related Art In recent years, groundwater, surface water, natural water such as lake water and seawater, various wastewaters, industrial, agricultural, and water for industrial use have been developed.
Not only are environmental standards and discharge standards strictly required for water quality, but also measures and countermeasures are required for chemical substances (for example, substances suspected to be endocrine disrupting substances) and odors that are not regulated. It's time to take steps.

[0003] The sludge generated in various industrial fields is the same as in the case of this water. In addition to the purpose of simply discarding, there is a strong demand for a treatment for reusing the sludge. I have.

[0004] In recent years, research and development of biological treatments have been progressing in order to carry out the treatments in accordance with the above-mentioned objects. In particular, a technique utilizing soil fungi has attracted attention (Japanese Patent Laid-Open No.
Nos. 162910, 59-166217, 60-12194, etc.) and a simple seed sludge production apparatus embodying these methods is disclosed in Japanese Examined Patent Publication No. 5-1099.
No. 9 is described.

[0005] A simple apparatus for producing this kind of sludge is composed of an outer casing, an inner cylinder, a microorganism metabolism circuit inducer (solid filler), and an air diffuser. The solid filler is a solid material, which is eluted into a liquid such as preliminary seed sludge and contributes to the culture.

[0006]

[Problems to be solved by the invention]
In the apparatus described in Japanese Patent Publication No. 10999, since the upper end of the inner cylindrical body is closed with a porous perforated plate material, each time a solid filler (also referred to as a pellet) is filled or refilled, a porous perforated plate is used. It was necessary to remove the plate material, and the operation was very complicated.

Another problem is that sludge aggregates, hair, and downsized pellets adhere to the wire mesh used as the porous perforated plate, and the upward flow due to the diffusion of sludge in the inner cylinder is obstructed. there were.

Further examination of the properties of the sludge obtained by this apparatus revealed that there was a problem that the sludge dewaterability was poor.

[0009] Further, it was found that the pellets stagnated in the inner cylinder, the upward flow of sludge was deviated, and the air was not supplied and a putrid odor which was partially anaerobic was generated. At the same time, it was found that the seed sludge obtained also had putrefactive odor.

On the other hand, the applicant of the present application has previously disclosed
In Japanese Utility Model Registration No., a culture device was proposed in which an upper portion of the inner cylinder was opened and a porous perforated plate made of wire mesh or punched metal was provided around the upper portion.

In an apparatus using a wire mesh as the porous perforated plate, the opening is located above the inner cylindrical body.
The complication of pellet filling, which is a drawback of the apparatus described in JP-A-99-99, could be eliminated. Further, the problem that sludge aggregates, hair, and miniaturized pellets adhered to the wire mesh and hindered the upward flow due to the diffusion of sludge in the inner cylinder could also be solved.

However, when the properties of the sludge obtained by this apparatus are examined, it is found that the dewatering property of the sludge is as described in JP-B-5-1099.
Although it was improved over the device described in JP-A-9, it was not yet satisfactory. Further, it was found that a slight putrefaction odor was observed in the obtained cultured sludge.

The apparatus using a perforated metal as the porous perforated plate is also the same as a wire mesh, and the sludge dewatering property is particularly inferior to that using a wire mesh.

Further, when the sludge obtained by the apparatus described in Japanese Utility Model Publication No. 5-10999 and Japanese Utility Model No. 30021094 is transferred to a batch type reaction tank (batch tank) and used for wastewater treatment, The problem of odor generation in the batch tank remained.

Therefore, the present invention enables the solid filler to be easily put into the inner container without flowing out of the solid filler, and has excellent dewatering properties of the obtained sludge, and has no odor of the obtained sludge. It is another object of the present invention to provide an apparatus for activating useful microorganisms which does not generate odor even when used in a batch tank or the like.

[0016]

According to a first aspect of the present invention, there is provided an apparatus for activating useful microorganisms, comprising an inlet for inflowing an object to be treated and an outlet mainly for extracting useful microorganisms after treatment. Inside the mold container body, an internal container is provided through an appropriate gap with respect to the inner wall of the container body, and useful microorganisms are proliferated, prioritized, or maintained in the internal container, or the activity of the useful microorganism. It is filled with a solid filler for achieving or maintaining its activation, has an air diffuser below the inner container, the upper part of the inner container is open, and the lower part can hold the solid filler. In the apparatus for activating useful microorganisms, which is configured to be able to introduce air from the air diffuser, a slit is formed in an upper portion of the inner container, and a lower end of the slit is below a liquid level of the object to be processed. Yes, the upper end is the liquid of the processing object Characterized in that it projects from.

According to this configuration, the solid filler can be easily put into the inner container without flowing out of the solid filler, the obtained sludge has excellent dewatering properties, and the obtained sludge has no odor. Further, it is possible to provide an apparatus for activating useful microorganisms which does not generate odor even when used in a batch tank or the like.

According to a second aspect of the present invention, there is provided the apparatus for activating useful microorganisms according to the first aspect, wherein the outlet is provided at an intermediate position of the vertical container body. is there.

According to this configuration, when the useful microorganisms in the vertical container main body are taken out, about half of the useful microorganisms can be left in the main body, so that they can be preferably used as seed sludge in the next activation operation.

According to a third aspect of the present invention to solve the above-mentioned problems, the inner container comprises a filling portion of the filler and an upper portion thereof.
3. The apparatus for activating a useful microorganism according to claim 1, wherein an upper part of the filling part is a slit part.

According to this configuration, an ascending flow of air and fluid is formed in the filling section, and the filler can be suspended.
In the slit portion, turbulence (hereinafter, referred to as turbulence) due to collision between the upflow and the downflow can be added to the upflow. The turbulent flow occurs on the inner surface of the slit due to the contact between the upward flow in the internal container and the downward flow outside the internal container via the slit, and the turbulent flow prevents clogging in the slit.

According to a fourth aspect of the present invention, the installation position of the outlet of the vertical container main body is adjusted to the position of the bottom of the slit portion.
An apparatus for activating the useful microorganism described in the above.

According to this configuration, by increasing the length of the slit portion, the above-mentioned turbulence effect is increased, the contact ratio between the filler and the sludge is increased, and the effect of activating useful microorganisms is further improved.

According to a fifth aspect of the present invention, there is provided the invention as set forth in the first, second, third or fourth aspect, wherein the slit portion is formed on a part or the entire periphery of the inner container. It is a device for activating useful microorganisms.

Although the effect of the present invention can be exerted even when the slit portion is formed only in a part of the periphery of the inner container, the effect is further improved when the slit portion is formed on the entire surface around the inner container. Is played.

In another preferred embodiment of the present invention, the slit portion has a shape in which the slit portion is opened upward in a straight line or in a curved line.

[0027]

Embodiments of the present invention will be described below.

In the present invention, activation of a useful microorganism means that a useful microorganism is proliferated, prioritized, or maintained, or that the useful microorganism is activated or its activation is maintained. It is a meaning that includes.

The object to be introduced into the apparatus of the present invention includes activated sludge of a biological treatment system, useful microorganisms which require the above-mentioned activation, and the like.

The useful microorganism obtained by the apparatus of the present invention can be applied to various biological treatments. For example, by supplying the useful microorganism to a batch tank, which is a batch type reaction tank, the effects of the present invention can be exerted well. Alternatively, the solution may be sent to a continuous reaction tank or a pretreatment tank, a raw water tank, a sludge storage tank, a sludge concentration tank, a separately provided culture tank, or the like.

In the present invention, useful microorganisms include:
It mainly means Bacillus bacteria. This point has not only been confirmed by the present inventors, but has already been confirmed by Murakami et al. In the Japanese Society of Agricultural Chemistry, Vol. 66, No. 03 (1992).

The solid filler used in the present invention is a pellet having the above-mentioned activating function, and is a natural or artificial humus, a silicate such as andesite or rhyolite or a mixture thereof, or a mixture thereof. It is obtained by molding a raw material obtained by mixing inorganic salts into pellets. Table 1 shows an example of the composition of the solid filler.

[0033]

[Table 1]

The shape of the solid filler is cylindrical, square,
The shape is arbitrary such as a spherical shape, an elliptical shape, and a spindle shape. In addition, a pumice stone or the like can be used in combination.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side sectional view showing an embodiment of the apparatus for activating useful microorganisms according to the present invention.

In FIG. 1, reference numeral 1 denotes a vertical container main body,
The lower part has a hopper structure, and the upper part constitutes a cylindrical container (tank) closed with an openable top cover 11. The upper part of the side wall of the vertical container main body 1 is provided with an inlet 12 through which an object to be processed introduced and processed into the vertical container main body 1 is introduced. An outlet 13 for extracting useful microorganisms is provided.

Reference numeral 2 denotes an internal container, which is accommodated in the vertical container main body 1 at a suitable distance S from the inner wall of the vertical container main body 1 by a spacer 21. The gap S is one of the functions of the present apparatus, and is a function of circulating the object to be processed, that is, the object to be processed which has risen inside the inner container 2 flows out from the upper portion of the inner container 2 and is separated from the vertical container main body 1. It is sufficient that there is an interval such that the action of flowing down the gap S between the lower portion of the inner container 2 and the inside of the inner container 2 again is performed.

The inner container 2 is formed in a cylindrical shape to accommodate the solid filler P therein, and has a cylindrical filling portion 2a for filling the solid filler P, and a slit portion 2b at an upper portion thereof. Is configured. The upper part of the inner container 2 is open without any obstruction, so that the solid filler P can be easily injected into the inner container 2 from the inlet 14 opened in the upper lid 11 of the vertical container body 1. Is configured.

Below the filling portion 2a of the inner container 2, a supporting portion 22 for supporting the solid filler P in the inner container 2 is provided.
Is provided. The support portion 22 is provided in the vertical container main body 1.
The air discharged from the air diffuser 3 disposed below the inner container 2 is configured to be able to be introduced into the inner container 2 through the support portion 22. For example, a hole is provided such that the solid filler P does not drop. And a slit structure having an interval that does not allow the solid filler P to fall, and the like.

The slit 2b at the upper part of the inner container 2 constitutes a gap for allowing the object to be processed to flow out of the inner container 2 without allowing the solid filler P in the inner container 2 to flow out. That is, a continuous opening is formed from one end of the gap to the other end.

Although the width of the slit depends on the capacity of the apparatus and the size of the solid filler P, it is preferable to select a value slightly smaller than the diameter of the solid filler P within a range of 5 mm to 30 mm.

As such a slit portion 2b, in addition to the illustrated example in which a rod 23 made of a wire, a steel material, or the like is formed upright at a predetermined interval on the upper portion of the inner container 2, the slit portion 2b of the inner container 2 is formed. Examples thereof include those formed by erecting a plate material such as a steel plate at a predetermined interval on the upper portion, and those formed by cutting out the upper portion of the inner container 2 at a predetermined interval.

Further, the slit portion 2b is not limited to be provided on the entire surface around the upper portion of the inner container 2 so as to surround the opening above the inner container 2 as shown in FIG. , May be formed partially on the periphery of the upper portion of the inner container 2. For example, as shown in FIG. 2, four slits 2 b are formed in opposing shapes using a bar 23,
A portion where the slit portion 2b is not formed may be used as a side wall of the inner container 2 as it is.

For the purpose of preventing the solid filler P from flowing out of the inner container 2, the lower end of the slit portion 2 b is lower than the liquid level W of the processing object accommodated in the vertical container main body 1. It is important that the upper end protrudes from the liquid level W of the object. It is more preferable that the upper end protrudes above the overflow outlet 15 provided at the upper part of the vertical container main body 1.

In the example shown in FIG. 1, the slit 2b
Is provided slightly below the liquid level W, but as shown in FIG. 3, the lower end of the slit portion 2b is further extended so that the height of the slit portion 2b is higher than the height dimension of the filling portion 2a. It is also preferable to make the dimension longer.

In the present invention, the length of the slit portion 2b is L when the length from the support portion 22 in the inner container 2 to the upper end of the inner container 2 is L (see FIG. 1).
/ 10 L is preferable, and more preferably 4/5 L to
The range is 1 / 5L.

An upward flow of air and fluid is formed in the filling portion 2a of the inner container 2, and the solid filler P inside can be suspended, and a turbulent flow can be added to the upward flow in the slit portion 2b. This turbulent flow is generated on the inner surface of the slit portion 2b when the upward flow in the internal container 2 and the downward flow outside the internal container 2 come into contact with each other through the slit portion 2b. Although the clogging is prevented, the turbulence effect is increased by increasing the length of the slit portion 2b, the contact ratio between the solid filler P and the sludge is increased, and the activation effect of the useful microorganisms is further improved. improves.

In this embodiment, it is preferable that the installation position of the outlet 13 of the vertical container main body 1 be adjusted to the position of the bottom of the slit portion 2b in order to efficiently operate the present apparatus.

The slit form of the slit portion 2b is as follows.
As shown in the figure, the slit is not limited to the one extending vertically in the upper part of the inner container 2 but may be formed in a spiral shape so as to surround the periphery of the opening above the inner container 2.

Further, it is also possible to adopt a form in which the opening is gradually expanded upward. There are two types of expansion such as a linear expansion and a curved expansion.

The cross-sectional shape of the vertical container main body 1 and the internal container 2 is arbitrary such as circular or square. Although the material is not particularly limited, it is also possible to reduce the cost by diverting an existing concrete fume pipe, steel pipe, resin pipe or the like.

The air diffuser 3 is provided below the inner container 2 in the vertical container main body 1, supplies air into the inner container 2, and supplies a solid filler carried in the inner container 2. P is brought into contact with air,
It also plays a role in creating an upward flow.

In order to activate useful microorganisms by the above-mentioned apparatus, the object to be treated is received and filled in the vertical container main body 1 from the inflow port 11, air is supplied from the air diffuser 3, and An ascending liquid flow is created to bring the object to be treated into contact with the solid filler P in the inner container 2. The liquid that has risen inside the inner container 2 goes down the gap S through the slit 2b at the upper part of the inner container 2, is again introduced from the bottom of the inner container 2, and circulates in the vertical container main body 1.

Since the upper portion of the inner container 2 from which the object to be treated flows out is formed by the slit portion 2b, the upper portion of the inner container 2 is formed of a porous plate material such as punched metal or wire mesh. In comparison, the occurrence of clogging due to adhesion of sludge aggregates, hair, miniaturized pellets, and the like included in the object to be treated is small. Therefore, a constant circulating liquid flow can always be created, and the activation of useful microorganisms can be stabilized. In the course of such liquid circulation, useful microorganisms are proliferated, prioritized and activated, and sludge is reformed.

The sludge thus modified becomes odorless and hardly perishable, has good dewatering properties, and maintains its properties even when exposed to outside air. The water separated (dewatered) from such sludge is also generally odorless and sterile (no E. coli, etc.). For example, dewatered sludge is converted into compost as it is to return to agricultural land. Can be reused immediately.

Usually, a method is adopted in which the sludge modified here is mixed with a large amount of unmodified sludge and the whole is reformed with a slight aeration and / or stirring. By adopting this method, a relatively large-scale water treatment facility can be introduced only by introducing the small useful microorganism activation device according to the present invention,
It is possible to deodorize the entire treatment facility and to effectively use the generated sludge and treated water (closed system).

[0058]

Hereinafter, the present invention will be described with reference to Examples.
The present invention is not limited by the following examples.

The apparatus for activating useful microorganisms (Examples 1 and 2) and the conventional apparatus (Comparative Examples 1 to 3) according to the present invention were installed in a batch type activated sludge water treatment (sewage treatment) facility, and operated. Was done. In this test, a system was used in which the sludge was extracted from the bottom of the batch tank with a submersible pump, treated and reformed with this device, and then returned to the flow control tank.

The specifications of the apparatus according to the present invention and the conventional apparatus are as shown in Table 2.

[0061]

[Table 2]

In the apparatus according to the present invention, the slit at the upper portion of the inner container has a linear shape with a slit width of 20 mm and a slit length of about 700 mm (Example 1) and a slit width of 2 mm.
A linear shape having a slit length of 0 mm and a slit length of about 500 mm (Example 2) was used.

The length of each of the wire mesh and the punched metal provided on the upper side surface of Comparative Examples 2 and 3 was about 500 mm.

As solid fillers, all were about 40 pumice stones.
Approximately 40 kg of humic pellets having a diameter of 20 mm and a diameter of 20 mm were filled.

The effective capacity of the apparatus for the batch tank is about 1% in each case. Sludge was extracted from the apparatus every 8 hours.

As a result, in the case of sewage treatment, in the device of Comparative Example 1, the wire mesh on the upper part of the inner container having a function of preventing the exhausted and small humic pellets from being discharged from the inner container,
Aggregates of sludge, hair, miniaturized pellets adhere,
A phenomenon occurred in which the upflow due to the aeration of sludge was obstructed in the inner container.

In the apparatuses of Examples 1 and 2 and Comparative Examples 2 and 3, such a phenomenon was not observed at all, and the difference between the rising flow rates estimated by visual observation was twice that of the apparatus of Comparative Example 1. That was all.

However, in the case where the structure of the upper part of the inner container is not a slit structure but a wire mesh (Comparative Example 2) or a punching metal (Comparative Example 3), unless the amount of air diffusion is reduced, a rapid upward flow occurs. A phenomenon was observed in which humic pellets flowed out from the inner container. Therefore, in Comparative Examples 2 and 3, it was necessary to suppress the aeration more than in Examples 1 and 2, and as a result, the effect of the sludge reforming was lower than in Examples 1 and 2.

Tables 3 and 4 show the results of the odor analysis after three months when the odor of the treatment plant was reduced under the above conditions and the properties of the sludge generated at that time.

[0070]

[Table 3]

[0071]

[Table 4]

In comparison with Examples 1 and 2, Example 1 is superior in both odor and sludge properties. This is because the slit length of the slit portion is longer than that of the second embodiment, so that the turbulent flow effect due to the contact between the upward flow and the downward flow through the slit portion is high, and the solid filler and the sludge are in contact with each other. This is considered to be due to the fact that the contact ratio was further increased and the effect of activating useful microorganisms was improved.

[0073]

According to the present invention, the solid filler can be easily put into the inner container without flowing out of the solid filler, the obtained sludge is excellent in dewatering properties, and the odor of the obtained sludge is reduced. It is possible to provide an apparatus for activating useful microorganisms that does not generate odor even when used in a batch tank or the like.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an apparatus for activating useful microorganisms according to the present invention.

FIG. 2 is a cross-sectional view showing another example of the internal container of the apparatus for activating useful microorganisms according to the present invention.

FIG. 3 is a side sectional view showing another example of the apparatus for activating useful microorganisms according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical container main body 11 Top lid 12 Inflow port 13 Outlet port 14 Input port 15 Outflow port for overflow 2 Internal container 2a Filling part 2b Slit part 21 Spacer 22 Supporting part 23 Bar material 3 Air diffuser P Solid filler S Gap W Liquid surface

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C12M 3/02 C12M 3/02

Claims (5)

[Claims] 1. An internal container is provided in a vertical container main body having an inlet for inflowing an object to be treated and an outlet for taking out mainly useful microorganisms after treatment, with an appropriate gap to the inner wall of the container main body. Growing useful microorganisms in the inner container,
Prioritize or maintain them, or try to activate useful microorganisms, or fill with a solid filler to maintain the activation, have a diffuser below the internal container, above the internal container Is open and the lower portion is a useful microorganism activation device configured to be able to carry the solid filler and to be able to introduce air from the air diffuser portion, wherein a slit portion is formed at an upper portion of the inner container, An apparatus for activating useful microorganisms, characterized in that a lower end of the slit portion is below the liquid surface of the object to be processed and an upper end protrudes from the liquid surface of the object to be processed. 2. The apparatus for activating useful microorganisms according to claim 1, wherein the outlet is provided at an intermediate position of the vertical container main body. 3. The apparatus for activating useful microorganisms according to claim 1, wherein the inner container comprises a filling portion of the filler and an upper portion thereof, and the upper portion of the filling portion is a slit portion. 4. The apparatus for activating useful microorganisms according to claim 1, wherein the installation position of the outlet of the vertical container main body is adjusted to the position of the bottom of the slit portion. 5. The apparatus for activating a useful microorganism according to claim 1, wherein the slit is formed on a part or the whole of the periphery of the inner container.