JP2002086124A - Sewage treating system of garbage treatment drainage by disposer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of BOD load increase, odor increase and sludge increase by utilizing microorganism preparation and ozone, a high performance underwater aerator and an ORP sensor control soft exhibiting a synergetic effect of its feature though a disposer cannot be used hitherto because of giving excess treatment load to an existing sewerage disposal facility or a septic tank when garbage of a kitchen is subjected to pulverizing treatment by a disposer and then is directly discharged to sewerage. SOLUTION: Anaerobic decomposition is executed in a second tank by pouring the microorganism preparation, if necessary, aerobic oxidative decomposition is executed in a third tank by injecting ozonized air and agitating. In a precipitator being in a fourth tank, a supernatant liquid part is transported to a disinfection tank, a lower part is transported to the third tank as return sludge, a bottom layer is transported to a sludge decomposing basin being in a sixth tank as excess sludge and is circulated to the first tank after ozone decomposition. By constructing a system provided with means described above, a disposer can be used in the kitchen for a common home and business. Further invention of clause 5 is relating to a computer soft which enables invention of clauses 1 to 4 to be automatically controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The invention of the first aspect relates to a technique for treating garbage sewage crushed by a general household disposer by a public sewerage system, and the second aspect of the invention relates to a business having a high BOD. The technology in the case where the wastewater of garbage crushed by the disposer for garbage is treated by a private purification facility, and the invention of the third item is a general house or apartment house in a sewer undeveloped area or a small restaurant or other restaurant. The invention of item 4 relates to a technology for treating garbage disposal wastewater by a disposer.
The present invention relates to technology for treating garbage disposal wastewater with a high-OD commercial disposer for sewage treatment.

[0002] The invention of Item 5 is a method for implementing the invention of Items 1, 2, 3, and 4 in which the first, second, third and sixth tanks are fixed to the bottom. The present invention relates to a technology of software for automatically controlling and managing the stirring and air supply operations of each underwater aerator being performed by an ORP controller in cooperation with an ORP sensor provided in each tank, an ozone generator and an air blower.

[0003]

2. Description of the Related Art Conventional sewage treatment facilities, septic tanks or public sewage systems have low responsiveness to disposer drainage and load B.
There were difficulties in increasing OD load, increasing odor due to anaerobic treatment, and treating excess sludge. In general, there are many problems such as collection, transportation, incineration, and incineration of ash from landfills.In particular, carbon dioxide is emitted from smoke exhausted from incineration, and air pollution due to the generation of dioxins is severe, causing pollution. Was. That is,
Conventional incineration has dioxin problems and high cost financial problems. In addition, the primary treatment system in the existing sewerage development area is convenient, but it is double treatment and expensive.

[0004]

DISCLOSURE OF THE INVENTION BO in public sewer or septic tank by garbage disposal wastewater by disposer
In order to cope with the increase in D, bad odor and sludge load, it was an issue to provide a means for easily purifying the wastewater to a certain standard or less and discharging the wastewater directly to a river.

[0005]

In order to solve the above-mentioned problems, in the present invention, surplus sludge, which is the biggest problem, is firstly decomposed with ozone in low concentration ozonized air in a sixth sludge decomposition tank. Then, the ozonized air discharged from the tank is injected into the first tank and the third tank, deodorization is performed in the adjustment tank of the first tank, and decomposition is promoted in the aerobic tank of the third tank. That is, the use of low-concentration ozonized air for decomposing excess sludge, and then the means for wasteful and cyclical reuse of the waste ozonized air were performed.

Further, when a hardly decomposable fat or oil or the like flows into the inflow wastewater, a means for injecting a microorganism and injecting a high-performance underwater aerator to facilitate the decomposition is provided.

The high-performance underwater aerator, which is fixed at the bottom of each of the first tank, the second tank, the third tank, and the sixth tank, performs agitation and air supply operations by using an ORP sensor provided in each tank and an ozone sensor. The generator and the air blower are linked to each other, and software means relating to a system that can be controlled and managed by the ORP controller is provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The invention of the first aspect relates to sewage treatment of garbage wastewater disposer mainly for general households.
When the drainage flows into the public sewer, it first flows into the first adjustment tank. A screen is provided in front of the regulating tank of the first tank, and is separated into decomposable substances and non-decomposable substances mixed in the wastewater, and the non-decomposable substances are removed. I do. It is mixed with the reflux decomposition liquid from the sixth tank and adjusted while stirring with an aerator provided at the bottom of the first tank. At this time, since the discharged ozone remains in the reflux decomposition liquid, it effectively acts on the deodorization in the process after the adjustment tank.

The government has approved the use of disposers on the condition that primary treatment septic tanks are installed. However, after assessing the state of dissemination in the United States and other countries, primary disposal of disposer-treated wastewater from garbage is not necessary, and direct wastewater treatment or public wastewater treatment is not required. A decision was made to allow treatment in the sewer. In addition, recent disposers have improved the material of the crushing blade and the ability of the motor for rotating power, and also improved the packing performance of the installation part, etc. Extremely fine pulverization becomes possible and can flow smoothly in the drain pipe. For one disposer operation, about 5-8 (5)
1 water is used, but since water for washing foods, dishes, cooking utensils, etc. can be used, there is almost no effect on the amount of tap water used.

After the adjustment in the adjusting tank of the first tank, the waste water is discharged to the second tank.
The tank is transferred to the anaerobic tank. The wastewater flowing into the second tank is BO
Since D is about 200 to 300 ppm, there is little need to inject the microbial preparation, but in the case of hardly decomposable water quality such as oils and fats, the microbial preparation is appropriately injected. In the second tank, an anaerobic reaction is promoted by stirring with a submerged aerator.

Next, the anaerobically treated wastewater from the second tank is transferred to the third tank, an aerobic tank. In the third tank,
The returned sludge from the fourth settling tank is returned as seed sludge, and therefore contains microorganisms. In addition, only the ozonized air discharged from the sludge decomposition tank of the sixth tank or only the direct air from the air blower is injected, the air is stirred and sent by the aerator, and the oxidative decomposition is continued for about 8 hours under aerobic conditions. , ORP200
Oxidatively decomposes under the condition of about 500 mV.

Next, the wastewater oxidized and decomposed in the third tank is transferred to the sedimentation tank of the fourth tank. After a lapse of 2 to 3 hours, a supernatant liquid is generated. The supernatant liquid is transferred to the fifth disinfection tank, and after being disinfected, discharged into a river.

After the supernatant liquid of the fourth settling tank is transferred, the sludge is returned to the aerobic tank of the third tank as seed sludge. The returned sludge contains microorganisms, and is aerobically decomposed by drainage from the anaerobic tank of the second tank, stirring and air supply.

The settled sludge after returning the returned sludge from the settling tank of the fourth tank is transferred as excess sludge to the sludge decomposition tank of the sixth tank. Into the sixth tank, ozonized air is injected from an ozone generator, and ozone is decomposed by stirring with an aerator.

The ozonized air injected into the sludge decomposition tank of the sixth tank has an ozone generator and an air blower controlled by an ORP controller to determine an ozone concentration suitable for ozone decomposition.

The sludge decomposition liquid ozonized in the sludge decomposition tank of the sixth tank is returned to the regulating tank of the first tank, and the contained ozone is mixed with the inflow wastewater of the first tank to effectively deodorize. Works.

The invention of the second aspect is that the BOD of the garbage disposer for business use in food processing plants, bento / lunch kitchens, hotels, restaurants, food factories, etc. and the activated excess sludge is 30.
It is intended to be used in cases where the concentration is as high as 00 to 50,000 ppm, and it cannot be discharged directly to public sewerage, but it can be discharged to public sewerage after purification treatment by setting up a purification facility for private use. That is, when fats and oils and the like are contained in the sewage flowing into the anaerobic tank of the second tank, a microbial preparation suitable for promoting the decomposition of oils and fats is injected from a dispenser connected to the tank, and The anaerobic treatment is carried out while stirring under an anaerobic condition and a redox potential of -200 to -300 mV.

In the case of the second aspect of the invention, the same as in the first aspect of the invention, the decomposition liquid ozonized in the sixth sludge decomposition tank is refluxed in the first adjustment tank. Since dissolved ozone remains in the sludge decomposed liquid related to the reflux, there is an action of deodorizing the stench of the adjustment treatment in the first tank by stirring. In the center of the bottom of the tank, an aerator which is the same stirring device as in the first aspect of the present invention is provided.
The aerator is automatically controlled by the ORP sensor.

In the decomposition treatment in the anaerobic tank of the second tank, the organic matter generates carbon dioxide, hydrogen, hydrogen sulfide, nitrogen, methane and the like as end products of decomposition through organic acids, alcohols and the like.

In the decomposition treatment in the aerobic tank of the third tank, carbon compounds are converted into carbon dioxide and water, and nitrogen compounds are converted into ammonia or nitrate. In aerobic metabolism, the ratio of organic substances synthesized by microorganisms is high, but in anaerobic metabolism, the ratio is small.

The capacity of the third tank and the sixth tank is designed and installed according to the flow rate and water quality of the target wastewater. The deeper the tank, the longer the residence time of ozone bubbles, the finer bubbles and the synergistic effect of trace ozone Is big.

The third aspect of the present invention is a process for purifying garbage processing wastewater by a disposer in a general house or apartment house, a small restaurant, or the like in a sewer undeveloped area. A purification facility will be installed and the scale will be adjusted to the amount of wastewater.

[0023] The invention of the fourth aspect is a facility for purifying garbage disposal wastewater by a business disposer having a high BOD in an undeveloped area of a sewerage system, and has a scale corresponding to the amount of treated wastewater.

The invention according to a fifth aspect is the invention according to the first to fourth aspects, wherein the aerator fixed at the bottom of each of the first, second, third and sixth tanks is provided. It is automatically controlled by an ORP controller in conjunction with an ORP sensor provided in the tank.

[0025]

An embodiment will be described with reference to FIG. FIG. 1 is a plan view showing the arrangement of the first to sixth tanks in the first, second, third, fourth, and fifth aspects of the invention. The inflow wastewater is separated into decomposable substances and non-decomposable substances by a screen before the adjustment tank 1 of the first tank, and only the decomposable wastewater flows into the adjustment tank 1. The liquid decomposed by ozone is refluxed from the sludge decomposition tank 8 of the sixth tank to the adjustment tank 1. Since ozonized air remains in the reflux liquid, the aerator 1
The stirring action of No. 5 has an action to deodorize the odor of anaerobic decomposition in the process after the adjustment tank. However, since the amount of the reflux liquid is about 1 to 3% with respect to the inflow wastewater amount, the adjustment tank 1 is in an anaerobic state as a whole. After adjustment in the adjustment tank 1, the second
The tank is transferred to the anaerobic tank.

A microbial preparation is injected from the dispenser 3 according to the inflow condition of the hardly decomposable oil and fat from the wastewater flowing into the anaerobic tank of the second tank 2. The anaerobic treatment is promoted by the stirring of the aerator 16, and the ORP is treated under the condition of -200 to -600 mV for about 2 to 8 hours.

In the aerobic tank 4 of the third tank, the waste water transferred from the second tank 2 and the seed sludge returned from the sedimentation tank 5 of the fourth tank are mixed together, and the sludge decomposition tank of the sixth tank is mixed. Only the exhausted ozonized air or the air from the air blower 10 that is refluxed from 8 is directly injected, and decomposition under aerobic conditions is promoted by stirring and sending air from the aerator 17, and under conditions where the ORP is about 200 to 500 mV, It is processed for about 8 hours.

The wastewater oxidized and decomposed in the aerobic tank 4 of the third tank is transferred to the sedimentation tank 5 of the fourth tank, and after a lapse of 2-3 hours, the supernatant liquid is transferred to the disinfection tank 6 of the fifth tank and disinfected. It is released into the river afterwards.

In the sedimentation tank 5 of the fourth tank, the sludge after the supernatant liquid is transferred is returned as seed sludge to the aerobic tank 4 of the third tank as return sludge. Since the returned sludge contains microorganisms, the sludge is aerobically oxidatively decomposed by injecting low-concentration ozonized air or air and agitating and sending air to the aerator 17. The ozone discharged from the sixth tank 8 is reused as the ozonized air.

The returned sludge in the settling tank 5 of the fourth tank is returned as excess sludge to the sludge decomposition tank 8 of the sixth tank after returning the returned sludge, and the air blower 10 is supplied to the sludge decomposition tank 8 of the sixth tank.
Is connected to the medium concentration (2
(00-600 ppm) of ozonized air to inject ozonolysis, and then the decomposed liquid is refluxed to the adjusting tank 1 of the first tank.

In the second aspect of the present invention, since the amount of waste water or sludge flowing into the adjusting tank 1 of the first tank is about 1000 to 50,000 ppm, after being transferred to the anaerobic tank 2 of the second tank, the waste water or sludge is suitable for oils and fats of the waste water. The microbial preparation was injected from the dispenser 3 and stirred with a stirrer 16 fixed at the bottom to promote the treatment under anaerobic conditions.
The mixture is stirred under the condition of -300 mV. Stirring time is 2
Perform for ~ 8 hours. Others are carried out in accordance with the invention of the first item.

According to the third aspect of the present invention, since the sewage treatment system is a garbage treatment wastewater treatment system using a general household disposer in a sewerage undeveloped area, the system is implemented in a sewage treatment facility suitable for the scale of the treatment wastewater. In the case of a detached house, the sewage treatment facility of the present invention according to the scale of the resident is provided in the premises of the house, and in the case of a shared house, the sewage treatment facility in the premises is provided in accordance with the number of houses.

According to the invention of the fourth aspect, since the sewage treatment system is a garbage disposal wastewater treatment system using a commercial disposer in a sewage undeveloped area, it can be implemented in a treatment facility according to the type of garbage and the amount of effluent in business. is necessary. In the anaerobic tank of the second tank, the effluent for business use has a high oil and fat concentration,
Microbial preparations are required depending on the water quality. An optimal formulation is prepared from about 37 types of microorganisms that decompose oils and fats, proteins, starch, cellulose, lignin, sugar, and the like.

In the fifth aspect of the present invention, the first, second, and third aspects
In carrying out the inventions of the above paragraphs and 4, the stirring and air supply operations of the respective aerators 15 to 18 which are fixed at the bottom of the first tank 1, the 22nd tank, the third tank 4 and the sixth tank 8 are performed. ORP sensor provided in each tank and ozone generator 9
And an air blower 10 that implements software related to a system in which the ORP controller 11 can automatically control and manage the system.

[0035]

According to the present invention, in the case of sewage treatment of garbage treatment wastewater by a disposer, in an anaerobic tank,
Inject microbial preparations according to the water quality of the inflow wastewater, such as fats and oils,
Stirring with a high-performance underwater aerator, injecting low-concentration ozonized air into an aerobic tank, and stirring and sending air with a high-performance underwater aerator to activate microorganisms, enzymes, activators of microorganisms, and ozonation Anaerobic decomposition /
The effect of promoting the action of aerobic decomposition is significant.

In the sludge decomposition tank for surplus sludge, which is the biggest problem, medium concentration ozonized air is injected from an ozone generator to which an air blower is connected, and firstly, the sludge is ozone decomposed by stirring and air supply. The decomposed liquid is returned to the first control tank, and the ozonized air remaining in the decomposed liquid is reused in the control tank, effectively acting on the deodorization of the offensive odor after the control tank. . This is also the reuse of the ozone discharged from the sludge decomposition tank.

Further, the ozone discharged from the sludge decomposing tank is injected into the aerobic tank, and the discharged ozone is reused, thereby effectively promoting the aerobic oxidizing action.

A high-performance underwater aerator is fixed at the bottom of each of the first, second, third and sixth tanks.
The synergistic effect of being able to freely perform a biological reaction under anaerobic conditions with stirring without air supply or with stirring without air supply is large.

In combination with the above effects, the present invention makes it possible to easily increase the load of treated water, increase the odor, increase the amount of fats and oils, and particularly increase the amount of sludge, which is the subject of sewage treatment of garbage treatment wastewater by a disposer. For kitchens and commercial use of single-family houses and apartment houses, it is very effective that the existing sewage treatment facility can be remodeled or the disposer can be used by a septic tank for disposer drainage.

Completion of a sewage treatment system for waste disposal using a disposer, not only eliminating the need for conventional garbage collection trucks, but also eliminating carbon dioxide emissions and dioxin emissions from incineration of garbage. The effect of preventing air pollution is great. In addition, the cost savings of the government's garbage incineration are greatly reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an arrangement according to the system of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 1st tank: Adjustment tank 2 2nd tank: Anaerobic tank 3 Microbial preparation dispenser 4 3rd tank: Aerobic tank 5 4th tank: Sedimentation tank 6 5th tank: Disinfection tank 7 O ₃ eraser 8 6th tank: Sludge Decomposition tank 9 Ozone generator 10 Air blower 11 ORP control 12 ORP sensor 13 ORP sensor 14 ORP sensor 15 ORP sensor 16 Aerator 17 Aerator 18 Aerator 19 Aerator

Claims (5)

[Claims] In the case of treating garbage wastewater by a disposer in a public sewer, the wastewater flowing into a regulating tank of a first tank is stirred and adjusted, and then transferred to an anaerobic tank of a second tank to be anaerobically treated. After constant stirring under the conditions, the mixture is transferred to the aerobic tank of the third tank. In the third tank, low-concentration ozonized air is injected, and after the aeration and agitation treatment under the aerobic condition, Transfer to the four sedimentation tanks, transfer the supernatant liquid after settling to the disinfection tank of the fifth tank, discharge it to the river after disinfection, and return the sludge after transferring the supernatant liquid of the fourth tank to the disinfection tank. The sludge returned from the third tank is returned to the third tank, and the settled portion after returning the returned sludge is transferred as excess sludge to the sludge decomposition tank of the sixth tank, and medium-concentration ozonized air is injected into the sixth tank. And the mixture is stirred and decomposed with ozone. Then, the decomposed liquid is returned to the regulating tank of the first tank, and the ozone of the settled sludge is removed in the sixth tank. Sewage treatment system for a food waste disposal waste water by disposer that was characterized by Drying decomposition exhaust ozonized air to the third vessel. 2. A wastewater flowing into an adjustment tank of a first tank in a case where a garbage processing wastewater crushed by a commercial disposer having a high BOD is treated in a private purification facility before being discharged to a public sewer. After adjusting the stirring, the mixture is transferred to the anaerobic tank of the second tank, and the microorganism preparation is appropriately injected according to the inflow / drainage conditions such as oils and fats. After constant stirring under anaerobic conditions, the mixture is transferred to the aerobic tank of the third tank. In the third tank, low-concentration ozonized air is injected.
Transfer to the sedimentation tank of the tank, transfer the supernatant liquid after settling to the disinfection tank of the fifth tank, discharge to the public sewer after disinfection, the sludge after the transfer of the supernatant liquid of the fourth tank as return sludge The sludge is returned to the third tank, and the sedimented portion after the return in the fourth tank is transferred as surplus sludge to the sludge decomposition tank of the sixth tank, and medium-concentration ozonized air is injected into the sixth tank and stirred. A garbage disposal wastewater by a disposer, characterized in that after the ozonolysis, the decomposition liquid is refluxed to the first treatment tank, and the decomposed waste sludge discharged in the sixth tank is returned to the third tank. Sewage treatment system. 3. In the case of sewage treatment of garbage treatment effluent by a general house or apartment house or a small restaurant or other disposer in a sewer undeveloped area, the invention according to claim 1 according to the scale of effluent is carried out. Sewage treatment system for garbage disposal wastewater by disposer. 4. A garbage disposal in a sewage undeveloped area by a business disposer having a high BOD. A garbage disposal by a disposer which implements the invention according to the second aspect according to the scale of the effluent in the case of purifying wastewater. Wastewater sewage treatment system. 5. The method according to claim 1, 2, 3 or 4, wherein each of the submersibles fixed at the bottom of the first, second, third and sixth tanks. Software that controls and controls the aeration and aeration operations of the aerator by linking an ORP sensor provided in each tank with an ozone generator and an air blower.