JPH10272480A - Waste water cleaning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an efficient waste water cleaning system which is automatically controlled in charging of microorganism to waste water in the field of the waste water cleaning for flow passage system, such as lakes, ponds and rivers, as the waste water cleaning system utilizing the microorganisms. SOLUTION: This waste eater cleaning system has a septic tank 54 which successively houses the waste water flowing from the flow passage system, cleans the waste water and discharges the same, a water quantity measuring means 51 which occasionally measures the quantity of the waste water flowing into the septic tank 54, a flow meter 52 which occasionally measures the flow rate of the waste water flowing into the septic tank 54, a microbiological preparation charging means 55 which charges microbiological prevention into the waste water housed in the septic tank 54 and a control means 56 which deteriormines the conditions for charging the microbiological preparation in order to control the quantity of the waste water to the target water quantity in accordance with the results of the measurement by the water quantity measuring means 51 and the flow meter 52 and contrails the miucrobiological preparation charging means 55 in such a manner that the microbiological preparation is chargned into the septic tank 54 according to these conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater purification system, and more particularly, to a wastewater purification system using microorganisms in a field of wastewater purification for a flow path system such as water of a lake or a river. The present invention relates to an efficient wastewater purification system in which the introduction of microorganisms into a wastewater is automatically controlled.

[0002]

2. Description of the Related Art Due to various human activities, phosphorus,
The eutrophication caused by ponds, lakes and marshes, slow-flowing rivers, drainage channels, etc., caused by large amounts of wastewater containing nutrients such as nitrogen and organic matter flowing into natural water systems, can cause algae and higher plants to become harmful. Growth causes environmental deterioration such as a shortage of dissolved oxygen, and has a great effect on other organisms. Furthermore, some algae, such as the blue-green algae that make up blue-green algae, have a bad influence on the surrounding environment due to their unique odor.

[0003] There have been many attempts to solve the above problems caused by eutrophication. Among them, there are several attempts to improve water quality by introducing useful microorganisms into lakes and rivers and decomposing and removing organic matter in wastewater by microorganisms. Specifically, a method using mutant bacteria (particularly, JP-A-62-49999), a method using an aerobic microorganism (JP-A-7-6027).
No. 8) and microbial materials used in these methods (described in JP-A-4-247297, JP-A-7-241585, and JP-B-7-15029).

[0004] However, any of the above-mentioned methods for improving water quality using microorganisms is a study on microorganisms themselves and microorganism materials, and attempts to more efficiently introduce microorganisms or microorganism materials into water to be purified. At present, no attempt has been made yet.

On the other hand, in order to purify water containing edible oil discharged from a commercial kitchen or household wastewater, a method and an apparatus for automatically charging a composite microorganism into a treatment tank have been developed (particularly). JP-A-7-308691). In this complex microorganism automatic introduction device, a fixed amount of the complex microorganism is introduced into the treatment tank at an initial stage of operation of the device. afterwards,
The introduced composite microorganisms are basically kept in the treatment tank to continuously purify the above-mentioned miscellaneous wastewater which sequentially flows into the treatment tank, but since the composite microorganisms may flow out or become deactivated, In this case, a water quality sensor is provided in preparation for such a case. If the water quality deteriorates due to insufficient water purification in the treatment tank for the above reason, the water quality sensor detects this and sends a signal to the means for charging the complex microorganisms, similar to the method for charging at the initial stage. In this system, a certain amount of complex microorganisms is put into a treatment tank.

[0006] As described above, in the method and the apparatus for automatically introducing the complex microorganism, the object of purification is the above-mentioned miscellaneous waste water, and the purpose is to completely purify the waste water in the treatment tank. The system is based on the fact that there is always an excess of microorganisms in the system, so the system is designed to control the introduction of complex microorganisms by checking the degree of purification of water discharged from the device. As a result, in the treatment of gray water as described above, the input of complex microorganisms has been automated and the workability has been improved. Attempts to apply to water treatment of a flow path system to be treated have a problem in terms of treatment capacity.

[0007] Therefore, in a wastewater purification system using microorganisms, in the field of wastewater purification for a flow path system such as water of lakes and marshes and rivers, the introduction of microorganisms into wastewater is sufficiently controlled, and efficient wastewater purification is performed. The development of a purification system was desired.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above point of view, and is directed to a wastewater purification system utilizing microorganisms in the field of wastewater purification for a flow path system such as lake or marsh water. It is another object of the present invention to provide an efficient wastewater purification system in which the introduction of microorganisms into wastewater is automatically controlled.

[0009]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have constituted a drainage purification system of a flow path system as follows.

That is, the present invention provides a septic tank for sequentially accommodating, purifying and discharging wastewater flowing from a channel system, a water quality measuring means for measuring the water quality of the wastewater flowing into the septic tank as needed.
A flow meter for measuring the flow rate of the wastewater flowing into the septic tank as needed, a microbial preparation input means for inputting a microbial preparation into the wastewater contained in the septic tank, based on the measurement results of the water quality measuring means and the flow meter, A wastewater purification system comprising: a control unit that controls the microbial preparation input unit so as to determine a microbial preparation input condition for setting the water quality of the wastewater to a target water quality and to supply the microbial preparation to the septic tank according to the condition. is there.

The "flow path system" used in this specification
Refers to rivers and drains, ponds, lakes, marshes, seas and other water systems, and "drain" generally refers to ponds,
Possessing lakes, lakes, marshes, harbors, harbors, inland waters, slow flowing rivers, drains, etc. that contain nutrients such as phosphorus, nitrogen and organic matter that have flowed into or into lakes or the sea. Dissolved oxygen is consumed compared to the supply of oxygen to water, which results in an increase in the amount of biomass in the water, or already eutrophic, resulting in an increase in the amount of biomass in the water or the mineralization of organic matter (respiratory oxidation by organisms). Refers to water that requires purification, such as excess dissolved oxygen-deficient water.

Further, in addition to the configuration of the above-mentioned waste water purification system, the present invention further comprises a water quality measuring means for measuring the water quality of waste water discharged from the waste water purification tank as needed, and measuring the water quality of waste water flowing into the waste water purification tank as needed. 1) a water quality measurement means (second) different from the above, wherein the control means compares the water quality measured by the second water quality measurement means with the target value of the water quality and analyzes the result over time. The method according to claim 1, wherein the conditions for charging the microorganism preparation are modified as necessary, and the means for supplying the microorganism preparation are controlled so that the microorganism preparation is supplied to the septic tank in accordance with the modified conditions. System.

Further, in addition to the above configuration of the waste water purifying system, the present invention further includes a septic tank (first) which accommodates waste water discharged from the septic tank and accommodates waste water flowing from the flow path system. And the flow rate of wastewater flowing into the second septic tank is measured as needed.
A flow meter (second) different from the flow meter (first) for measuring the flow rate of the wastewater flowing into the septic tank at any time, and the microbial agent is introduced into the wastewater accommodated in the second septic tank. 1
A microbial preparation inputting means (second) different from the microbial preparation inputting means (first) for inputting the microbial preparation into the wastewater accommodated in the septic tank, and a second water quality measuring means and a second flowmeter. Based on the measurement result, a condition for supplying the microbial preparation for setting the water quality of the waste water to the target water quality is determined, and the second microbial preparation input means is supplied so that the microbial preparation is supplied to the second septic tank according to the condition. And a control means (second) different from the control means (first) for controlling the first microbial preparation input means, and a second means for measuring the water quality of wastewater discharged from the second septic tank at any time. 3 water quality measurement means, wherein the second control means, based on the water quality measured by the third water quality measurement means, as required by the microbial preparation, as in the first control means. It is characterized by modifying the conditions of input To provide a drainage purification system that.

As the microbial agent charging means used in the wastewater purification system of the present invention, specifically, a hollow fixed shaft, a rotating shaft rotatably provided outside the fixed shaft, and the rotating shaft A device for supplying air and a microbial preparation into drainage and stirring the drainage, comprising an impeller comprising a plurality of blades having openings and concave portions provided radially on the fixed shaft, The rotating shaft has one or more fixed shaft holes penetrating the shaft inside and outside, and the rotating shaft penetrates the rotating shaft inside and outside, and is provided between one or more blades adjacent to each other. When the fixed shaft hole and the rotating shaft hole communicate with each other, a flow path from the inside of the fixed shaft to the outside of the rotating shaft hole through the rotating shaft hole is formed, and the fixed shaft hole is formed. Is to install at least a part of the device in the drainage and air inside the fixed shaft. When the mixture with the microbial agent is supplied, the mixture is provided at a position where the mixture can stay on one of the blades through the flow path, and the mixture stays on the blade, and the rotating shaft is rotated by the buoyancy. Moving the microbial preparation together with air into the waste water, and moving the rotary shaft hole to the position of the adjacent rotary shaft hole, the microbial preparation input means including a device for supplying and stirring the microbial preparation into the waste water. Can be mentioned.

Hereinafter, the present invention will be described in detail. The wastewater purification system of the present invention includes: a septic tank for sequentially accommodating and purifying wastewater flowing from a channel system; a water quality measuring unit for measuring the water quality of the wastewater flowing into the septic tank as needed; and a wastewater flowing into the septic tank. A flowmeter for measuring the flow rate of the wastewater, a microbial preparation input means for inputting the microbial preparation into the wastewater accommodated in the septic tank, and a water quality target water quality based on the measurement results of the water quality measurement means and the flowmeter. And control means for controlling the microbial agent input means so that the microbial agent is input to the septic tank in accordance with the conditions.

Hereinafter, the wastewater purification system of the present invention is constituted by (1) a septic tank, (2) water quality measuring means, a flow meter, and (3)
The description will be made in the order of the microbial preparation input means, (4) the control means for controlling the microbial preparation input means, and (5) the entire wastewater purification system of the present invention.

(1) Septic tank The septic tank used in the wastewater purification system of the present invention has an inlet for taking in the wastewater flowing from the channel system into the septic tank and an outlet for sequentially discharging the wastewater treated in the septic tank outside the septic tank. Having. The size of the septic tank is not particularly limited. In the wastewater purification system of the present invention, a microorganism preparation is introduced into the wastewater that flows in from the inflow port and is sequentially stored in the purification tank by the microorganism preparation introduction means. Therefore, the septic tank has a structure into which a microbial preparation can be charged, for example, a microbial preparation input port.

Here, the phrase "the wastewater is successively stored in the septic tank" means that the wastewater continuously passes through the septic tank from the inlet to the outlet, or passes while temporarily staying in the septic tank. It means a state, such as a state, in which wastewater continuously passes through the septic tank. In the wastewater purification system of the present invention, since the wastewater continuously flows into the purification tank, if the wastewater further flows in beyond the capacity of the purification tank, the wastewater near the outlet is sequentially discharged to the outside of the purification tank.

At the inlet and the outlet of the septic tank, wastewater flows into the septic tank, and receives a microorganism preparation in the septic tank.
As long as it is installed at a position where a series of processes of discharging from the septic tank can be performed thereafter, the installation position is not particularly limited except for that. Preferably, the inflow port and the outflow port are provided such that the wastewater uniformly passes through the septic tank from the inflow port to the outflow port. In order to allow the wastewater to pass through the septic tank evenly, a mechanism that adjusts the flow rate of the wastewater flowing into the septic tank as necessary may be provided at an appropriate position near the wastewater inlet of the septic tank. It is possible.

The septic tank may have a stirring device, an aeration device, etc. in order to allow the waste water to pass through the septic tank uniformly. Examples of the stirring device include an underwater propeller. The aeration apparatus is an apparatus for the purpose of aeration. However, since water flow often occurs due to the aeration, the effect of stirring can be obtained by using the aeration apparatus. Specific examples of the aeration device include an aeration device in which a high-pressure blower, an air compressor, and the like are combined with a porous diffuser plate, a porous diffuser tube, and the like.

Further, by installing the aeration device and the stirring device in the septic tank, the wastewater in the septic tank is subjected to aeration treatment. Aeration is a method generally used for various types of wastewater treatment, and it is possible to increase the amount of dissolved oxygen in wastewater in a state of insufficient dissolved oxygen by aeration.However, in the wastewater purification system of the present invention, Since the microbial preparation is added, by combining this with aeration, the microorganisms in the input microbial preparation can be more activated in the wastewater.

(2) Water quality measuring means and flow meter The waste water purification system of the present invention comprises a water quality measuring means for measuring the quality of the waste water flowing into the septic tank and a flow meter for measuring the flow rate of the waste water flowing into the septic tank. Prepare.

The physical properties of the wastewater measured by the water quality measuring means used in the present invention include physical properties which can be used as an index when purifying the wastewater using a microbial preparation, specifically BOD, CO
D, SS, TN (total nitrogen), TP (total phosphorus), p
H, EC (electrical conductivity), water temperature, dissolved oxygen (DO),
ORP (oxidation-reduction potential) and the like. In order to measure such physical properties of the waste water, the water quality measuring means of the waste water purification system of the present invention includes measuring equipment usually used for measuring them, such as a BOD sensor, a COD automatic measuring instrument, and a T-meter. An N automatic measuring instrument, a TP automatic measuring instrument, a turbidity meter, a pH meter, an EC meter, a water temperature meter, a DO meter, an ORP meter and the like are provided.

In the waste water purification system of the present invention, it is possible to use a water quality measuring means capable of measuring all of these physical properties, but the physical properties to be measured according to the characteristics of the waste water are determined by one.
It is also possible to use one or two. In addition, as the flow meter included in the wastewater purification system of the present invention, the same flow meter as that generally used for measuring the flow rate of a liquid can be used.

The water quality measurement by the water quality measurement means and the flow rate measurement by the flow meter of the waste water purification system of the present invention are performed periodically or continuously. Whether to perform water quality or flow rate measurement continuously or periodically is selected as appropriate,
When the wastewater purification system of the present invention is first introduced into a water system to be subjected to wastewater treatment, it is preferable to continuously measure water quality and flow rate. After that, based on the results of the continuous water quality and flow rate measurement, the measurement is further continued continuously or periodically,
For example, whether to perform measurement every 2 to 24 hours or the like may be selected. Whether the water quality and flow rate are measured continuously or periodically is preferably constantly reviewed based on the water quality and flow rate measurement results since the introduction of the wastewater purification system of the present invention.

The positions of the water quality measuring means and the flow meter are not particularly limited as long as the water quality and the flow rate of the wastewater flowing into the septic tank can be measured. In the wastewater purification system of the present invention, the water quality measurement result and the flow measurement result of the wastewater flowing into the septic tank, which are measured by the water quality measurement means and the flow meter, are transmitted to the control means immediately after the measurement, and the condition of the microorganism preparation input Used for the determination of

(3) Microbial preparation input means The wastewater purification system of the present invention includes a microbial preparation input means for supplying a microbial preparation to wastewater stored in the above-mentioned septic tank. In the wastewater purification system of the present invention, the microbial preparation is introduced into the wastewater using the microbial preparation input means, whereby the water purification ability of the system, specifically, BOD, CO
It is possible to improve the removal rate of D, SS, TN (total nitrogen), TP (total phosphorus), and the like.

First, the microorganism preparation to be introduced into the wastewater by the microorganism preparation introduction means in the wastewater purification system of the present invention will be described. The microorganisms contained in the microbial preparations are not particularly limited as long as they are effective microorganisms for wastewater purification.Specifically, microorganisms having high resolution of organic substances and natural increase similar to those used in ordinary wastewater purification systems are used. Microorganisms that can improve the biota of the formed ecosystem can be mentioned. Also, typical examples of the microorganisms used in the above-mentioned ordinary wastewater purification system include aerobic microorganisms called about 2,000 species used under aerobic conditions in the activated sludge method of sewage treatment, and the activated sludge method. Anaerobic microorganisms such as methane bacteria, sulfate-reducing bacteria, photosynthetic bacteria, lactic acid bacteria, and yeast used in the treatment of sludge produced in sewage treatment, pulp mill wastewater treatment, and alcohol distillation wastewater treatment. Among the various microorganisms, microorganisms suitable for each environment in the wastewater purification system of the present invention can be appropriately selected and used.

Among such microorganisms, the microorganisms used in the wastewater purification system of the present invention include, more specifically,
Microorganisms belonging to actinomycetes, for example, Streptomyces
sp (Streptomyces sp.) (ATCC 3004), Streptoverticillium sp.
(ATCC 23654), Nocardia sp.
(ATCC 19247), Micromonospora, sp (Micromonos
pora sp.) (ATCC 12452), Rhodococcus sp (Rhod
ococcus sp.),

Microorganisms belonging to photosynthetic bacteria, for example, Rhodopseudomonas sp. (R. sp.)
haeroides), Rhodospirillum sp (Rhodospirillum)
sp.) (R.fulum), Chromatium sp (Chromatium)
sp.) (C. okenii), Chlorobium sp.
sp.) (C. limicola),

Microorganisms belonging to lactic acid bacteria (lactic acid-producing bacteria), for example, Lactobacillus sp.
FO 3070), Propionibacterium sp (Propionib
acterium sp.) (P.freudenreichii), Pediococcus sp. (P. halophilus), Streptococcus sp. (S.lacti)
s, S.faecalis),

Microorganisms belonging to filamentous fungi, for example, Aspergillus sp. (RIFY 5770, RIFY 50
24), Mucor sp (Mucor sp.) (IFO 8587), a microorganism belonging to yeast, for example, Saccharomyces sp.
(Saccharomyces sp.) (NRRL1346, Y977), Candida sp. (C. utilis) and the like.

The microorganism used in the wastewater purification system of the present invention can be obtained from soil or the like by a usual method. Furthermore, in the wastewater purification system of the present invention,
Usually, the microorganism thus obtained is artificially cultured by a general method and used. In culturing, a medium and culture conditions suitable for each microorganism are appropriately selected.

In the wastewater purification system of the present invention, a culture obtained by artificially culturing microorganisms as described above can be directly used as a microbial preparation. It is also possible to make up the formulation. Alternatively, a processed product such as a dried product may be used as a microorganism preparation. Furthermore, in consideration of the operability at the time of introduction into water and the sedimentation and diffusion properties of microorganisms after introduction, it is also possible to use a composition containing the microorganisms and the like together with various carriers and other optional components as a microorganism preparation. is there. That is, in the present specification, the term “microbial preparation” is used as a concept including all of the above-mentioned culture, microorganisms separated from the culture, processed products thereof, and compositions containing them. The dosage form of the microbial preparation is not particularly limited.

In the wastewater purification system of the present invention, the microbial preparation is charged into the wastewater by the microbial preparation input means at any time in accordance with the instruction from the control means. It may be stored in the microorganism preparation input means for about one month. Therefore, in the microbial preparation used in the wastewater purification system of the present invention, preferably, so that the activity of the microorganism does not decrease during the storage period until put into the wastewater, compounding components and carriers,
The dosage form and the like are selected. Specifically, considering storage stability, it is preferable that the microbial preparation used in the present invention is formulated in a dry state containing no water.

In preparing the microbial preparation for use in the present invention, BO preparation is performed according to the water quality of the wastewater to be injected.
BOD microbial preparation for the purpose of lowering D, similarly SS
Microbial preparations for SS for the purpose of descent, other T-N
It is also possible to prepare a microbial preparation for each application, such as an N-specific microbial preparation for the purpose of lowering TP and a P-specific microbial preparation for the purpose of lowering T-P.

Next, a description will be given of a means for charging the microorganism preparation into the wastewater. The microorganism preparation charging means in the wastewater purification system of the present invention is a means for charging the microorganism preparation into the wastewater accommodated in the septic tank, and a mechanism capable of weighing the microorganism preparation and introducing it into the wastewater. Having. In order to provide such a mechanism, basically, the microorganism preparation charging means used in the present invention has a microorganism storage tank, a measuring instrument, a microorganism charging section, and a driving source. The arrangement and operation of each member can be the same as those of automatic injection devices for various preparations and the like generally used in various fields.

Specific examples of the microbial preparation input section of the microbial preparation input means used in the present invention include an extrusion method using the rotation of a screw which is used regardless of the dosage form of the microbial preparation, a belt conveyer, a Warren motor, and the like. There are a roulette wheel method, a blowing method using compressed air, a peristaltic pump method particularly used when the microbial preparation is a liquid, and the like. Further, in the wastewater purification system of the present invention, in addition to using the above-described conventionally known microbial agent input machine as the microbial agent input section of the microbial agent input means, the present inventors newly invented It is also possible and preferable to use the following apparatus capable of simultaneously performing aeration and agitation of the wastewater while charging the microbial preparation into the system.

That is, in the wastewater purification system of the present invention, the microbial preparation input means of the microbial preparation input means includes:
A hollow fixed shaft, a rotating shaft rotatably provided outside the fixed shaft, and an impeller made up of a plurality of blades having openings and concave portions radially provided on the rotating shaft, An apparatus for supplying air and powder into water and stirring the water, wherein the fixed shaft has one or a plurality of fixed shaft holes penetrating the inside and outside of the fixed shaft, and the rotating shaft is Penetrating through the shaft inside and outside, having one or more rotation shaft holes provided between adjacent blades, when the fixed shaft hole and the rotation shaft hole communicate, the fixed shaft A flow path is formed from inside to the outside of the rotating shaft hole through the rotating shaft hole, and the fixed shaft hole is configured to install at least a part of the device in water and supply a mixture of air and powder into the fixed shaft. When you do
The mixture is retained at one of the blades through the flow path at a position where the mixture can be retained. The mixture stays in the blades, and the buoyancy causes the rotation axis to rotate and the powder diffuses into the water with air. In addition, it is preferable to use a device for supplying air and powder into water and stirring the water so that the rotation shaft hole moves to the position of the adjacent rotation shaft hole.

When the microbial preparation is introduced into the wastewater using the above-mentioned air-in-water and powder supply stirring device, the powder is replaced with the above-mentioned microbial preparation. In order to supply and agitate a mixture of air and a microbial preparation into drainage using the above-described apparatus, first, a mixture of air and a microbial preparation is allowed to flow into a fixed shaft, and a gap between the fixed shaft and the rotating shaft is provided. The fixed shaft hole and the rotating shaft hole communicate with each other through the through hole to form a flow path extending from the inside of the fixed shaft to the outside of the rotating shaft hole through the rotating shaft hole.

When the mixture is discharged into the drainage through the flow path, the air and a part of the microbial preparation in the mixture change their directions upward and move upward to release the rotary shaft hole which has released the mixture. In the recess of the blade provided in the vicinity of the blade.
On the other hand, the remaining microbial preparations in the mixture stay outside the tip of the rotary shaft hole and in the vicinity between adjacent blades. When the amount of air in the mixture remaining in the recess increases, buoyancy is generated by the weight of the drainage having the same volume as the volume of the stagnated air, and the rotational torque due to the buoyancy drives the impeller. When it becomes larger than this, the impeller rotates.

Next, the rotating shaft hole adjacent to the rotating shaft hole from which the mixture has been discharged is rotationally moved to the outside of the fixed shaft hole of the fixed shaft to communicate the fixed shaft hole and the rotating shaft hole. Is released into the wastewater. Then, air stays in the concave portion of the blade and the buoyancy further increases, and the impeller rotates while increasing the rotation speed. At the same time, the rotation of the impeller generates a circulating flow in the wastewater, and the circulating flow causes microbial preparations retained in the wastewater to diffuse in the wastewater. In addition, the air and the microbial preparations retained in the recesses of the blades are discharged into the wastewater by the rotational movement of the impeller, and the oxygen in the air dissolves in the wastewater to increase the amount of solvent oxygen in the wastewater. Then, the wastewater with the increased amount of solvent oxygen and the microbial preparation released into the wastewater are spread into the wastewater by the circulation flow. Next, as described above,
The mixture flows into the adjacent rotation shaft hole, and the air stays in the concave portion of the blade to generate buoyancy, so that the impeller rotates continuously. Then, the oxygen in the air is dissolved in the wastewater, and the microbial preparation is further diffused into the wastewater.

In the above apparatus, if the impeller is rotatably provided outside the fixed shaft, and if a mixture of air and a microbial agent can flow into the fixed shaft, the shape of the fixed shaft is particularly preferable. Although not limited, a specific example of the shape of the fixed shaft is a cylindrical shape.
Here, it is preferable to provide a gap between the outside of the fixed shaft and the impeller so that the impeller can rotate around the fixed shaft. Also, specifically, as a fixed shaft hole of the fixed shaft, when the entire device is installed in drainage, a fixed shaft hole provided on the side wall of the fixed shaft and located above the axis of the fixed shaft and parallel to the axial direction is fixed. And one or two or more supply holes arranged with a separation dimension of, and the supply holes may have a vertically long oval shape.

Further, in the above-mentioned apparatus, the impeller comprises a rotating shaft and a blade, and air is supplied to the blade to generate buoyancy. The buoyancy causes the impeller to rotate, and also has a function of supplying and agitating the mixture during drainage. If it has, its shape does not matter.
The number of blades of the impeller is preferably, for example, about 3 to 12 in consideration of the supply amount of air and powder into water. The rotating shaft has, for example, a through hole which is cylindrical and has a through hole extending in the axial direction, and is arranged on a peripheral wall of the rotating shaft at a position parallel to the axial direction of the rotating shaft with a certain separation dimension. One or a plurality of rotation shaft holes are provided, and the rotation shaft holes may be provided radially at a constant interval in the circumferential direction. The rotating shaft holes of the rotating shaft are arranged at positions where the respective rotating shaft holes communicate with the respective fixed shaft holes when the impeller rotates and rotates the rotating shaft holes to the positions where the fixed shaft holes are formed. Is preferred.

Further, in the above apparatus, it is preferable that the opening at the tip of the fixed shaft hole has a larger opening area than the opening at the tip of the rotating shaft hole. This is because the fixed shaft hole and the rotating shaft hole communicate with each other to secure a time for forming a flow path from the inside of the fixed shaft through the rotating shaft hole to the outside of the rotating shaft hole, so that many recesses of the blade are formed. This is for supplying the mixture. In addition, the opening at the tip of the fixed shaft hole and the opening at the tip of the rotating shaft hole are such that each rotating shaft hole is fixed when the impeller rotates and moves the rotating shaft hole to the position where the fixed shaft hole is formed. The shape of each opening is not limited as long as it can communicate with the shaft hole. Therefore, the opening at the tip of the fixed shaft hole and the opening at the tip of the rotating shaft hole can have the same shape or different shapes. Each opening may be formed so that one opening includes only a part of the other opening, in addition to the case where one opening includes the other opening.

In the above-described apparatus, the blade constituting a part of the impeller has an opening and a recess, and any shape can be used as long as the mixture can stay therein. The wings, for example,
An example in which the rotating direction of the impeller has a top-end circular arc shape at the tip, a large opening at the rear end, and a concave portion formed inside can be exemplified. In addition, a large number of partitioned small chambers are provided inside the blade, and the small chambers preferably have openings. This is because the air in the mixture discharged from the rotating shaft hole is efficiently retained in the blades, and the retained air is released into drainage to form small bubbles to efficiently dissolve oxygen in the air. .

If a device that can simultaneously perform the charging of the microbial preparation into the wastewater and the stirring and aeration of the wastewater is used as the microbial preparation input section of the microbial preparation input means of the wastewater purification system of the present invention, Purification can be performed more efficiently.

In the wastewater purification system of the present invention, several types of microbial preparations are prepared for purifying the wastewater in various states, and the microbial preparation is charged according to the water quality of the wastewater to be treated. It is also possible to select one or two or more of several types of microbial preparations and put them into the wastewater. In this case, it is necessary to install the microbial preparation input means as described above for the number of microbial preparations. You can also
It is also possible to arrange the microbial preparation storage tanks of the microbial preparation input means by the number of the microbial preparations, and to share a portion of the microbial preparation into the wastewater for each microbial preparation.

The conditions for introducing the microorganism preparation into the septic tank were as follows:
For example, the control unit described below instructs the microbial preparation input unit such as the input amount and the type of the microbial preparation to be used.

(4) Control Means In the waste water purification system of the present invention, the control means controls the water quality measurement result measured by the water quality measurement means for measuring the water quality of the waste water flowing into the septic tank and the flow rate of the waste water flowing into the septic tank. Based on the flow rate measurement result measured by the flow meter to be measured, determine the conditions for charging the microbial preparation for setting the water quality of the wastewater to the target water quality, and according to the conditions, set the microorganisms so that the microbial preparation is charged to the septic tank. It has the function of controlling the preparation input means. For this purpose, the control means used in the wastewater purification system of the present invention usually stores a program for controlling such a microorganism preparation feeding means.

The target water quality value is a target value when the wastewater flows out of the septic tank, and is set in consideration of the size of the septic tank, the time during which the wastewater stays in the septic tank, and the like. This value may be set in advance, or a method of inputting the value when the system is operating may be adopted. In any case, it is preferable that the design is made such that the initially set target value can be changed during the wastewater purification process.

A method in which the control means determines the conditions for introducing a microbial preparation for setting the water quality of the waste water to the target water quality based on the results of the measurement of the water quality of the waste water and the results of the measurement of the flow rate of the waste water is generally performed by using a microorganism. The method for selecting the type of microbial preparation and the method for calculating the input amount, which are performed when purifying wastewater using the preparation, may be used as they are. In addition, depending on the type of microbial preparation, perform preliminary experiments, etc.
Based on this, it is also possible to design the program.

In the wastewater purification system of the present invention, when the control means receives the water quality measurement result transmitted from the water quality measurement means or the flow rate measurement result transmitted from the flow meter according to the above program, the control means performs the processing based on these values. The kind and the input amount of the microorganism preparation necessary for setting the water quality of the wastewater stored in the septic tank to the target value set as described above are determined. Further, the control means instructs the microorganism preparation input means such as the type and the input amount of the microorganism preparation determined in the above process to the microorganism preparation input means, and the microorganism preparation input means operates accordingly.

(5) Wastewater Purification System of the Present Invention The wastewater purification system of the present invention comprises:
It comprises a water quality measuring means (2), a flow meter, a microorganism preparation input means (3) and a control means (4).

In the waste water purification system of the present invention, waste water is continuously supplied to the above-mentioned purification tank from a flow path system. The water quality and the flow rate of the wastewater flowing into the septic tank are measured at any time by the water quality measuring means and the flow meter. The measurement results of the water quality and the flow rate of the wastewater flowing into the septic tank measured by these are transmitted to the control means immediately after the measurement.

The control means is adapted to compare the water quality measurement result measured by the water quality measurement means for measuring the water quality of the wastewater flowing into the septic tank and the flow rate measurement result measured by the flow meter for measuring the flow rate of the wastewater flowing into the septic tank. Based on the conditions, the conditions for introducing the microorganism preparation for setting the water quality of the wastewater to the target water quality are determined, and the microorganism preparation introduction means is controlled so that the microorganism preparation is introduced into the septic tank according to the conditions. The microbial preparation input means inputs the microbial preparation into the wastewater stored in the septic tank according to the instruction of the control means. The wastewater into which the microbial preparation has been introduced moves in the septic tank while being purified while containing microorganisms, and is sequentially discharged out of the septic tank from the outlet.

In this way, the wastewater treated and discharged in the septic tank in the wastewater purification system of the present invention is appropriately moderated by the action of microorganisms contained in the microorganism preparation as a result of the efficient introduction of the microorganism preparation. It can be said that the water is purified and has a self-purifying effect by containing microorganisms.

Further, in the wastewater purification system of the present invention, in addition to the configuration of the wastewater purification system, the quality of the wastewater discharged from the wastewater treatment tank is measured as needed. Water quality measuring means (second) is provided separately from the water quality measuring means (first), and the control means compares the water quality measured by the second water quality measuring means with a target value of the water quality, and Based on the result of the analysis over time, modify the conditions for charging the microbial preparation as needed, and control the microbial preparation input means so that the microbial preparation is charged into the septic tank according to the corrected conditions. Is preferred.

With the above-described configuration of the wastewater purification system of the present invention, the conditions for charging the microorganism preparation are corrected and optimized, and the introduction of the microorganism preparation into wastewater can be performed more efficiently.

Here, the second water quality measuring means is exactly the same as the first water quality measuring means for measuring the water quality of the wastewater flowing into the septic tank at any time. Further, in the control means, the measurement result of the water quality transmitted from the second water quality measurement means, that is, the water quality of the wastewater discharged from the septic tank after the microbial preparation is charged under the conditions determined by the control means, As a method of comparing with a preset water quality target value, analyzing this over time, and correcting the condition for charging the microbial preparation, a conventionally established method may be used.

Specifically, when the water quality measurement result transmitted from the second water quality measurement means is lower than the target water quality, an amount of water corresponding to the difference between the water quality and the target water quality is determined. There is a method in which a microorganism preparation is added to the septic tank in an additional form. In this case, when the measurement result of the water quality transmitted from the second water quality measurement unit matches the target water quality, the additional introduction of the microorganism preparation is stopped. Then, the same operation is repeated thereafter.

Further, assuming that no difference appears as a result of the analysis over time between the water quality measurement result transmitted from the second water quality measurement means and the target water quality, In such a case, the part of the program stored in the control means that determines the microbial preparation input conditions is modified so that the microbial preparation input amount is smaller than the initial design, and specifically, the coefficient of the calculation formula The input amount of the microbial agent is reduced by adjusting the parameters and the variables, and the water quality measurement result transmitted from the second water quality measurement means is lower than the target water quality. There is also a method of performing additional input. In such a method of correcting the condition for introducing a microbial agent, when the measurement result of the water quality transmitted from the second water quality measurement means has fallen below the target water quality, the coefficient or variable It is also possible to increase the input amount of the microbial preparation by modifying the input so as to increase the input amount of the microbial preparation. Further, in the wastewater purification system of the present invention, in addition to the above configuration, a septic tank that accommodates wastewater discharged from the septic tank and that is different from the septic tank (first) that accommodates wastewater flowing from the flow path system. (2) a flow meter (1) that is different from the flow meter (1) that measures the flow rate of the wastewater flowing into the first septic tank as needed, and measures the flow rate of the wastewater flowing into the second septic tank as needed. 2)
A microbial preparation input means (first) for inputting a microbial preparation into wastewater stored in the first septic tank, wherein the microbial preparation is injected into wastewater stored in the second septic tank; Based on the results of the preparation input means (second) and the measurement results of the second water quality measurement means and the second flow meter, the conditions for inputting the microbial preparation for setting the water quality of the wastewater to the target water quality are determined. Control means for controlling the second microbial preparation input means such that the microbial preparation is supplied to the second septic tank in accordance with the following. A control means different from the control means (first) for controlling the first microbial preparation input means By providing (2), it becomes possible to operate the system with higher drainage purification capacity.

The waste water purification system further includes third water quality measurement means for measuring the water quality of waste water discharged from the second purification tank at any time, and the second control means comprises:
Based on the water quality measured by the third water quality measuring means, it is possible to operate the system more efficiently by modifying the conditions of the microbial preparation as needed, as in the first control means. It becomes possible.

The second septic tank in this waste water purifying system can be the same as the first septic tank containing the waste water flowing from the flow path system. The second flowmeter is the first flowmeter, the second microbial preparation input means is the first microbial preparation input means, and the third water quality measurement means is the first water quality measurement means. The same can be applied. Further, the second control means may have the same configuration as the first control means.

In the waste water purification system, the treatment of waste water in the first purification tank is as described above, but the waste water discharged from the first purification tank further flows into the second purification tank, And a second microbial preparation input means for further inputting a microbial preparation as needed. The water quality and flow rate of the wastewater flowing into the second septic tank are measured at any time by the second water quality measuring means and the second flow meter.
The measurement results of the water quality and flow rate of the wastewater flowing into the second septic tank measured by the above are transmitted to the second control means immediately after the measurement.

The second control means includes a water quality measurement result measured by the second water quality measurement means for measuring the water quality of the wastewater flowing into the second septic tank, and a water quality measurement result of the wastewater flowing into the second septic tank. Based on the flow rate measurement result measured by the second flow meter that measures the flow rate, the condition for charging the microorganism preparation for setting the water quality of the wastewater to the target water quality is determined. The second microbial preparation input means is controlled so as to be input into the septic tank. Second
The microbial preparation input means of the present invention inputs the microbial preparation into the wastewater accommodated in the second septic tank in accordance with the instruction of the control means of the above-mentioned 2. The wastewater into which the microbial preparation has been introduced moves in the second septic tank while being purified while containing microorganisms, and is sequentially discharged from the outlet to the outside of the second septic tank.

Further, the second control means compares the measurement result of the water quality transmitted from the third water quality measurement means with the target water quality, and based on the result of analyzing these over time, The process of correcting the conditions for charging the microorganism preparation, which is performed, is the same as that of the first control means.

Further, in the waste water purification system of the present invention, it is possible to increase the number of the purification tanks in the same manner as the second purification tank is connected in series to the first purification tank. In the case where a plurality of septic tanks are provided in this manner, the same microbial agent charging means as described above is provided for each of the septic tanks. Control means are provided. In addition, a water quality measuring unit and a flow meter are appropriately installed as described above.

[0069]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

[First Embodiment] FIG. 1 is a view schematically showing a first embodiment of a waste water purification system according to the present invention.

In the waste water purification system shown in FIG. 1, the purification tank 54 has an inlet 53 for taking in waste water from the flow path 50 and an outlet 57 for discharging waste water to the flow path 50. A first water quality measurement device 51 and a flow meter 52 for measuring BOD are provided in an inflow pipe for guiding drainage to the drainage pipe, and the first water quality measurement device and a first water quality measurement apparatus are provided for a discharge pipe for guiding drainage from an outlet 57 to the flow path 50. A second water quality measuring device 58 for measuring the same BOD is provided. Further, this wastewater purification system has a microorganism preparation input device 55 for supplying a microorganism preparation into wastewater stored in a purification tank, and further has a control device 56 for controlling the microorganism preparation input apparatus.

The first water quality measuring device 51 is for the wastewater flowing into the septic tank 54, and the second water quality measuring device 58 is for the wastewater 5
The BOD of the wastewater discharged from No. 4 is set to a fixed time (2
２４24 hours) or continuously. The flow meter 52 measures the flow rate of the waste water flowing into the septic tank for a fixed time (2 to 2).
24 hours) or continuously. First water quality measurement device 51, second water quality measurement device 58, and flow meter 52
Are transmitted to the control device 56.

The control device 56 includes a CPU, ROM, RA
M, an A / D converter, a D / A converter, and other circuits. The first water quality measurement device 51, the flow meter 52, the second water quality measurement device 58, and the D It is connected to the microbial preparation input device 55 via the / A converter.
The CPU in the control device 56 performs the following control shown in the flowchart of FIG. 2 according to the program stored in the ROM.

The control device 56 receives the BOD measurement result measured by the first water quality measurement device 51,
When the flow rate measurement results measured by the above are received, the input amount of microorganisms is determined based on those values so that the BOD value of the wastewater flowing out from the outlet becomes the target BOD value. Then, the microbial agent input device 55 is controlled so that the determined input amount is input to the septic tank. The target BOD value of the drainage is designed so that it can be input when the system is operating, and can be changed in the middle.

The controller 56 further controls the BOD of the wastewater flowing out of the septic tank, which is measured by the second water quality measuring device 58 at regular time intervals (2 to 24 hours) or continuously.
Receiving the measurement result of. The control device 56 compares the measured value of the BOD received from the second water quality measuring device 58 with the target BOD value set at the time of operating the system, analyzes this over time, and based on the result, Modify the conditions for the introduction of the microbial preparation as necessary.

The microbial preparation input device 55 includes a control device 56.
The microbial preparation is introduced into the wastewater stored in the septic tank 54 according to the conditions for supplying the microbial preparation determined as described above. Thereafter, the wastewater into which the microbial preparation has been introduced in the septic tank 54 moves through the septic tank and is discharged from the outlet 5.
7 is discharged to the flow path 50 via a discharge pipe.

Here, as the microbial preparation input section of the microbial preparation input device 55, specifically, a microbial preparation having both the function of supplying the microbial preparation and the function of aeration and agitation of waste water as shown in FIGS. A supply stirring device can be exemplified.

The microbial agent supply stirring device 1 shown in FIG.
The whole is installed in the drainage W, the fixed shaft 3 and the impeller 5
It has. The fixed shaft 3 is connected and fixed to a fixed object (not shown). The fixed shaft 3 has a cylindrical shape and has a through-hole 7 penetrating therein in the direction of the axis I. Fourteen fixed shaft holes 9 are provided on the side wall of the fixed shaft 3 at a position above the axis I of the fixed shaft 3 and parallel to the direction of the axis I with a certain spacing. I have. In addition, the number of the fixed shaft holes 9 can be arbitrarily changed based on the ability to supply and stir the air and the microorganism preparation into the wastewater.

The fixed shaft hole 9 has a vertically long oval shape. At both ends of the fixed shaft 3, flange portions 13 projecting outward are provided.
A communication pipe 17 connected to a compressor (not shown) that compresses and supplies a mixture 15 of the microorganism preparation P and the microorganism preparation P is connected.

The impeller 5 is rotatably provided outside the fixed shaft 3 via a small gap 19. The impeller 5
As shown in FIGS. 3 and 4, the rotating shaft 21 and the rotating shaft 21
Eight blades 23a, 23b provided radially outside the
23c, 23d, 23e, 3f, 23g, and 23h.

The rotating shaft 21 has a through hole 25 penetrating in the direction of the axis I.
A large number of rotary shaft holes 27 are provided at a position perpendicular to the direction of the axis I of FIG. Eight sets of the plurality of rotary shaft holes 27 are radially provided at a constant interval in the circumferential direction. Hereinafter, the aggregate 29 of the rotation shaft holes 27 is referred to as 29a, 29b, 29c, 29.
d, 29e, 29f, 29g, and 29h.

Fitting holes 31 for fitting bearings are provided at both ends of the rotating shaft 21, and ball bearings 33 serving as the bearings are fitted in the fitting holes 31. This ball bearing 33
A seal member 35 for preventing the drainage W from entering the inside of the ball bearing 33 and the rotary shaft 21 is mounted on the outside of the shaft.

The seal material 35 is provided outside the seal material 35.
And a movement prevention plate 37 for preventing movement of the ball bearing 33. The movement prevention plate 37 is fixed to a side portion of the rotating shaft 21 by a bolt (not shown).

The blades 23a, 23 provided on the rotating shaft 21
b, 23c, 23d, 23e, 3f, 23g, and 23h have a top-end arc shape at the tip in the rotation direction of the impeller 5, have a large opening (opening) at the rear end, and have a space (recess) inside. ) 4
3 are formed. The rotating shaft hole 29 is opened between the adjacent blades 23.

The operation in which the impeller 5 of the microbial agent supply / stirring device 1 rotates from the stopped state and the mixture 15 is supplied and diffused into the wastewater W will be described. FIG. 4 shows a state where the rotating shaft hole 29e and the fixed shaft hole 9 communicate with each other.

First, the mixture 15 of the air A and the microbial preparation P is compressed by a compressor (not shown) and discharged into one of the communication pipes 17. The mixture 15 is placed in the communication pipe 17.
May be supplied through one or the other of the communication pipes 17 connected to the flange portion 13 of the fixed shaft 3, or may be supplied through both the supply communication pipes 17.

The mixture 15 flows into the through hole 7 of the fixed shaft 3 through the communication pipe 17, and a part of the mixture 15 is formed between the plurality of fixed shaft holes 9 and the outside of the fixed shaft 3 and the rotating shaft 3. Shaft hole 29f near the fixed shaft hole 9 through the small gap 19 of FIG.
And is discharged into the drainage W through the rotary shaft hole 29f.

On the other hand, the mixture 15 which does not pass through the fixed shaft hole 29f passes through the through hole 7 of the fixed shaft 3 and returns to the compressor (not shown) through the other communication pipe 17. Next, the air A and a part of the microbial preparation of the mixture 15 discharged into the drainage W change their directions and move upward to open the blades 23f disposed near the rotary shaft hole 29f that has released the mixture 15. It passes through 41 and stays in the space 43 around the top of the blade 8f. On the other hand, after the remaining microbial preparation P is discharged into the wastewater W, it stays near the blade 29e and the blade 29f.

When the amount of the air A staying in the space 43 increases, buoyancy corresponding to the weight of the drainage W having the same volume as the volume of the staying air A is generated. Then, when the rotational torque due to the buoyancy becomes larger than the driving torque for driving the impeller 5, the impeller 5 rotates in the direction of the arrow Y (clockwise).

Next, as shown in FIG.
And adjacent to the rotating shaft hole 29f which has released the
9f, the rotation shaft hole 29e on the counterclockwise side moves to the outside of the fixed shaft hole 9 of the fixed shaft 3 to rotate the fixed shaft hole 9 and the rotation shaft hole 2
9e is communicated, and the mixture 15 is discharged into the drainage W from the rotation shaft hole 29e. The space 43 of the blade 23e
Then, the air A and a part of the microbial preparation P stay there, and the buoyancy further increases, and the impeller 5 rotates while increasing the rotation speed.

At the same time, the rotation of the impeller 5 causes the waste water W to circulate in the direction indicated by the arrow X, and the microbial preparation P released into the waste water W by this circulation flow is diffused into the waste water W. Further, the air A and a part of the microbial preparation P staying in the space 43 of the blades 23e and 23f are released into the drainage W by the rotational movement of the impeller 5, and the oxygen in the air A is dissolved in the drainage W. To increase the amount of solvent oxygen in the waste water W. And
The wastewater W and the microorganism preparation P, in which the amount of solvent oxygen has increased, spread into the wastewater by the circulating flow.

Next, in the same manner, the mixture 15 flows into the adjacent rotary shaft hole 29 and a part of the air A and the microbial preparation P stays in the space 43 of the blade 23 to generate buoyancy, thereby causing the impeller Rotate continuously, oxygen in the air is dissolved in the waste water W, and the microbial preparation P further diffuses in the waste water W.

Therefore, the wastewater W can be efficiently aerated and the microorganism preparation P can be efficiently diffused into the wastewater W. The amount of microorganisms input by the microorganism input device can be adjusted, for example, to 5 to 50 ppm / min, and can be input continuously according to instructions from the control device.

[Second Embodiment] FIG. 5 is a diagram schematically showing a second embodiment of the waste water purification system of the present invention.

The waste water purification system shown in FIG. 5 is different from the first embodiment in that the waste water discharged from the outlet 57 of the purification tank (first) 54 is further discharged to the second purification tank 64.
And a mechanism for sequentially containing the microbial preparation therein, discharging the microbial preparation into the flow channel 50, and the like. Until the wastewater that has flowed in from the flow path 50 is processed and discharged in the first purification tank 54, it is the same as the wastewater purification system of the first embodiment. The description is omitted.

The second septic tank 64 has an inlet 63 for taking in the drainage discharged from the first septic tank 54 and an outlet 67 for discharging the drainage to the flow path. In addition to the second water quality measuring device 58 for measuring the BOD, a second flow meter 62 is installed in an inflow pipe for guiding drainage to an inflow port 63 of a septic tank. Further, a discharge pipe for guiding drainage from the outlet 67 of the second septic tank to the flow path includes:
Third BOD measurement similar to the second water quality measurement device
Is installed. Further, the wastewater purification system includes a second microorganism preparation input device 6 for supplying a microorganism preparation into wastewater stored in the second septic tank.
5 and a second control device 66 for controlling the second microbial preparation input device.

The second flow meter 62 measures the flow rate of the waste water flowing into the second septic tank for a fixed time (2 to 2) in the same manner as the first flow meter 52 measures the flow rate of the waste water flowing into the first septic tank. 24
Measure every hour or continuously. Further, the third water quality measuring device 68 measures the BOD of the wastewater flowing out of the second septic tank 64 at regular intervals (2 to 24 hours) or continuously. Then, the second water quality measuring device 58 for measuring the water quality of the wastewater discharged from the first septic tank 54 and flowing into the second septic tank 64, the third water quality measuring device 68, and the second
The BOD measurement result and the flow measurement result obtained by measuring the respective flow meters 62 are transmitted to the second control device 66.

The second control device 66 is constructed in the same manner as the first control device 56, and operates in the same manner as the first control device controls the first microorganism input device 55. The second microbial agent input device 65 is controlled by determining the conditions for inputting the microbial agent into the second septic tank 64 by the agent input device 65 or correcting the conditions. In the second control device 66, the received BOD measurement result and flow rate measurement result are, as described above, the second water quality measurement device 58, the third water quality measurement device 68, and the second water quality measurement device 68.
Are the BOD measurement results and the flow measurement results obtained respectively by the flow meter 62 of FIG.

[0099] The second microbial preparation feeding device 65 determines the second microbial preparation in accordance with the microbial preparation input conditions determined by the second control device 66 as described above and indicated.
Into the wastewater stored in the septic tank 64. here,
The second microorganism preparation input device 66 can be exactly the same as the first microorganism preparation input device 56 described above.

[0100] The wastewater into which the microbial preparation has been introduced in the second septic tank moves in the second septic tank and is discharged from the outlet 67 to the flow path via the discharge pipe.

[0101]

The waste water purification system of the present invention is an efficient waste water purification system in which the introduction of microorganisms into waste water is automatically controlled in a flow passage waste water purification system for lakes, marshes and rivers.

[Brief description of the drawings]

FIG. 1 is a diagram schematically illustrating a first embodiment of a wastewater purification system of the present invention.

FIG. 2 is a diagram showing a flowchart of a control device in the first embodiment of the wastewater purification system of the present invention.

FIG. 3 is a longitudinal sectional view of an example of a microbe preparation supply and stirring device used in the wastewater purification system of the present invention.

FIG. 4 is a side view of an example of a microorganism preparation supply and stirring device used in the wastewater purification system of the present invention.

FIG. 5 is a view schematically showing a second embodiment of the wastewater purification system of the present invention.

[Explanation of Symbols] 50 flow path 51 first water quality measuring device 52 flow meter (first) 53 inflow port (first septic tank) 54 septic tank (first) 55 microorganism injection device (first) 56 control device (first 1) 57 Outflow port (first septic tank) 58 Second water quality measuring device 62 Second flowmeter 63 Inflow port (second septic tank) 64 Septic tank (second) 65 Microbial input device (second) 66 Control device (Second) 67 Outflow port (second septic tank) 68 Third water quality measuring device 1 Microorganism preparation supply stirring device 3 Fixed shaft 5 Impeller 7 Through hole (hollow) 9 Fixed shaft hole 15 Mixture 21 Rotating shaft 23, 23a , 23b, 23c, 23d, 23e, 3f, 23
g, 23h Blade 27 Rotation shaft hole 41 Opening (opening) 43 Space (recess) A Air P Microbial preparation W Drainage

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tatsuro Mizutani NEC Seiki Co., Ltd. 1-19-9 Tsutsumidori, Sumida-ku, Tokyo

Claims (4)

[Claims] 1. A septic tank for sequentially containing, purifying and discharging wastewater flowing from a channel system, a water quality measuring means for measuring the water quality of the wastewater flowing into the septic tank as needed, and a flow rate of the wastewater flowing into the septic tank. A flow meter for measuring at any time, a microbial preparation input unit for inputting a microbial preparation into the wastewater contained in the septic tank, and a measurement result of the water quality measurement unit and the flow meter,
A wastewater purification system comprising: a control unit that determines a condition for supplying a microorganism preparation for setting the water quality of the wastewater to a target water quality, and controls the microorganism preparation introduction unit such that the microorganism preparation is supplied to the septic tank according to the condition. 2. A water quality measuring means (second) different from a water quality measuring means (first) for measuring the water quality of wastewater flowing into the septic tank at any time, wherein the water quality measuring means measures the water quality of wastewater discharged from the septic tank. The control means compares the water quality measured by the second water quality measurement means with a target value of the water quality and analyzes the result over time. 2. The wastewater purification system according to claim 1, wherein the condition is corrected, and the microorganism preparation input means is controlled so that the microorganism preparation is charged into the septic tank in accordance with the corrected conditions. 3. A septic tank (2) that accommodates wastewater discharged from the septic tank and that is different from the septic tank (first) that accommodates wastewater flowing from the flow path system, and the second septic tank. A flow meter (second) different from the flow meter (first) for measuring the flow rate of waste water flowing into the first septic tank as needed, the flow meter measuring the flow rate of waste water flowing into the first septic tank at any time; A microbial preparation input means (second) different from the microbial preparation input means (first) for inputting the microbial preparation into the wastewater stored in the first septic tank, the microbial preparation being input into the stored wastewater; A condition for inputting a microbial preparation for setting the water quality of the wastewater to a target water quality is determined based on the measurement results of the second water quality measurement means and the second flow meter; The second microorganism preparation is injected so as to be put into the septic tank. A control means (second) different from the control means (first) for controlling the input means, and the control means (first) for controlling the first microbial preparation input means, and measuring the water quality of wastewater discharged from the second septic tank as needed And a third water quality measurement means, wherein the second control means, based on the water quality measured by the third water quality measurement means, as necessary as the first control means, 3. The wastewater purification system according to claim 2, wherein conditions for charging the microorganism preparation are corrected. 4. The microorganism preparation charging means has a hollow fixed shaft, a rotating shaft rotatably provided outside the fixed shaft, and an opening and a concave portion radially provided on the rotating shaft. An apparatus for supplying air and a microbial preparation to drainage and stirring the drainage, comprising an impeller including a plurality of blades, wherein the fixed shaft has one or a plurality of fixed members penetrating the inside and outside of the fixed shaft. Having a shaft hole, the rotation shaft penetrates the inside and outside of the rotation shaft, and has one or more rotation shaft holes provided between adjacent blades, and the fixed shaft hole When the rotating shaft hole communicates, a flow path is formed from the inside of the fixed shaft to the outside of the rotating shaft hole through the rotating shaft hole, and the fixed shaft hole is installed at least a part of the device in drainage. When a mixture of air and a microbial agent is supplied inside the fixed shaft, the mixture passes through the flow path. Provided at a position capable of staying the mixture into one of the vane Te, the accumulated mixtures on the wing, microbial formulation and the rotating shaft rotated by its buoyancy is diffused into the wastewater together with the air,
2. The wastewater purification system according to claim 1, further comprising a device for supplying and stirring the air and the microbial preparation into the wastewater, wherein the rotating shaft hole moves to a position of an adjacent rotating shaft hole.