JP7200301B2 - Deodorizing treatment system and organic matter treatment method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a deodorization system and an organic matter treatment method, and more particularly to a deodorization treatment system and an organic matter treatment method for deodorizing odorous gases generated in an organic sludge treatment facility.

A treatment system using a denitrification treatment method with a high mixing ratio of septic tank sludge for treating organic wastewater such as night soil and septic tank sludge and / or organic sludge is known. It is treated by a treatment using a removal method, a phosphorus removal method, or the like (see, for example, Japanese Unexamined Patent Application Publication No. 2015-73979). However, such a treatment system poses a problem of generating offensive odors, and various deodorizing facilities are employed to remove offensive odors.

As conventional deodorizing equipment, a biological deodorizing method, a chemical cleaning method, an activated carbon adsorption method, and the like are known. Among them, the biological deodorizing fixed bed method is a method of decomposing odorous components using microorganisms immobilized on a filler, and is advantageous in that maintenance is easy and running costs can be reduced.

JP 2015-73979 A

However, all of the above-described deodorizing equipment have the problem that the installation area and weight are large, and the deodorizing apparatus becomes large. For example, the above-mentioned deodorizing device using the fixed bed method of the biological deodorizing method has various advantages as described above, but on the other hand, the installation area and weight are large, supplementary water is required, and the electricity cost and maintenance of the circulation pump There is also the issue of cost, and there is room for improvement.

In view of the above problems, the present invention provides a deodorizing process that can reduce the size of the deodorizing equipment and omit equipment such as a circulation pump necessary for the deodorizing process, thereby making it possible to perform the deodorizing process more simply and economically. A system and method for treating organics are provided.

As a result of intensive studies by the present inventors in order to achieve the above object, it has been found that it is effective to adopt a deodorizing device for mixing a dehydration separation liquid containing an inorganic coagulant with a gas containing an odorous component. .

One aspect of the present invention, which was completed based on the above findings, is obtained by dewatering flocculated sludge obtained by flocculating organic wastewater and/or organic sludge containing at least night soil or septic tank sludge. The dehydration separation liquid containing the inorganic flocculant is mixed with the gas containing the odorous component, thereby reacting the odorous component with the inorganic flocculant and/or dissolving the water-soluble odorous component in the dehydration separation liquid. Provided is a deodorizing system provided with a deodorizing device for deodorizing a gas and obtaining a deodorizing gas and a deodorizing liquid.

In one embodiment, the deodorizing treatment system according to the present invention further comprises a separated liquid tank connected to the deodorizing device and storing a dehydrated separated liquid to be supplied to the deodorizing device.

In another embodiment of the deodorizing treatment system according to the present invention, the amount of residual iron in the dehydrated separated liquid supplied to the deodorizing device is 0.1 mg/L or more.

In still another embodiment of the deodorizing treatment system according to the present invention, the deodorizing treatment liquid is diluted with diluent water, and the deodorizing treatment system further comprises a discharge water tank for storing sewage discharge water for discharging into the sewage system.

In another aspect of the present invention, an inorganic flocculant obtained by dehydration treatment of flocculated sludge obtained by flocculating organic wastewater and / or organic sludge containing at least night soil or septic tank sludge is added. A step of deodorizing the deodorized separated liquid by mixing the dehydrated separated liquid containing the There is provided a method for treating organic matter having

In one embodiment, the method for treating organic matter according to the present invention further comprises a step of diluting the dehydrated separated liquid with diluent water and discharging it into the sewage system.

ADVANTAGE OF THE INVENTION According to the present invention, the deodorizing equipment can be kept compact, equipment such as a circulation pump required for deodorizing can be omitted, and the deodorizing treatment system and organic matter can be deodorized more simply and economically. A processing method can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows an example of the deodorization processing system which concerns on the 1st Embodiment of this invention. It is a schematic diagram showing an example of a deodorizing treatment system according to a second embodiment of the present invention. It is a schematic diagram showing an example of a deodorizing treatment system according to a third embodiment of the present invention. It is a schematic diagram showing an example of a deodorizing treatment system according to a fourth embodiment of the present invention. It is a schematic diagram showing an example of a deodorizing system according to a first modification of the fourth embodiment of the present invention. It is a schematic diagram showing an example of a deodorization processing system concerning the 2nd modification of a 4th embodiment of the present invention. It is a schematic diagram showing an example of a deodorizing treatment system according to another embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are denoted by the same or similar reference numerals. The embodiments shown below are examples of devices and methods for embodying the technical idea of the present invention. It does not specify anything.

(First embodiment)
The deodorizing treatment system according to the first embodiment of the present invention includes, as shown in FIG. An inorganic flocculant is added to flocculated sludge for dehydration treatment to obtain a dehydrated sludge and a dewatered separated liquid; a separated liquid tank 5 for storing the dehydrated separated liquid; By mixing the gas containing the component with the gas-liquid, the odorous component is reacted with the inorganic flocculant and/or the water-soluble odorous component is dissolved in the dehydration separated liquid to be deodorized, resulting in a deodorized gas and a deodorized liquid. and a deodorizing device 6 for obtaining and.

Organic wastewater and/or organic sludge containing soluble organic matter can be used as the object to be treated by the deodorizing treatment system according to the present embodiment. Specifically, industrial wastewater, sewage, primary treated sewage water, Secondary treated sewage water, night soil, livestock wastewater, wastewater from various manufacturing plants, excess sludge generated in biological treatment, septic tank sludge, etc. can be used.

Organic wastewater and/or organic sludge such as night soil and septic tank sludge is first introduced into the receiving tank 1 . The receiving tank 1 is provided with a settling tank 1a for settling and removing foreign substances in the organic wastewater and/or organic sludge, and the organic wastewater and/or organic sludge passes through the settling tank may be accommodated in the receiving tank 1. In addition, night soil and septic tank sludge may be stored separately, or may be mixed and stored.

The organic wastewater and/or organic sludge in the receiving tank 1 is stored in the storage tank 2 while solid matter is crushed by a pump with a cutter. The organic wastewater and/or organic sludge in the receiving tank 1 may be subjected to pretreatment to remove contaminants in the pretreatment facility 10 before being supplied to the storage tank 2 . As the pretreatment facility 10, various pretreatments can be performed using a drum screen, a screw press, a centrifuge, a multi-disc machine, and the like. Moreover, when there is no pretreatment equipment 10, the storage tank 2 may be omitted. In that case, the organic wastewater and/or organic sludge is sent directly from the receiving tank 1 to the flocculation facility 3 .

The organic wastewater and/or organic sludge stored in the storage tank 2 is sent to the aggregation facility 3 via a pump or the like. In the flocculation facility 3, the organic waste water and/or organic sludge are agitated and mixed to form flocculated flocs to produce flocculated sludge, which is then treated to facilitate solid-liquid separation.

In the flocculation equipment 3, a polymer flocculant is added via flocculant addition means or the like. Although the polymer flocculant is not particularly limited, any of anionic polymer flocculants, nonionic polymer flocculants, cationic polymer flocculants and amphoteric polymer flocculants can be used, and organic wastewater and / Or it can be appropriately selected depending on the properties of the organic sludge. When treating organic sludge, it is particularly preferred to use a cationic polymer flocculant or an amphoteric polymer flocculant.

Examples of anionic polymer flocculants include sodium polyacrylate, copolymers of sodium acrylate and acrylamide, sodium polymethacrylate, and copolymers of sodium methacrylate and acrylamide.

Examples of nonionic polymer flocculants include polyacrylamide and polyethylene oxide.

Examples of cationic polymer flocculants include acrylate-based polymer flocculants (also referred to as "DAA-based polymer flocculants"), methacrylate-based polymer flocculants (also referred to as "DAM-based polymer flocculants"), amide groups, , nitrile groups, amine hydrochlorides, polyvinylamidines containing formamide groups (also referred to as "amidine-based polymer flocculants"), Mannich-modified polyacrylamides, and the like. DAA-based polymer flocculants include polymers of quaternary dimethylaminoethyl acrylate and copolymers of quaternary dimethylaminoethyl acrylate and acrylamide. DAM-based polymer flocculants include polymers of quaternary dimethylaminoethyl methacrylate and copolymers of quaternary dimethylaminoethyl methacrylate and acrylamide.

Examples of amphoteric polymer flocculants include copolymers of quaternized dimethylaminomethyl acrylate, acrylamide and acrylic acid, and copolymers of quaternized dimethylaminomethyl methacrylate, acrylamide and acrylic acid. can be done. However, the above are examples, and the present invention is not limited to these.

The amount of polymer flocculant added varies depending on the properties of the organic wastewater and/or organic sludge and the type of polymer flocculant selected, but the dry weight of solids in the organic wastewater and/or organic sludge ( DS), preferably 0.5 to 3.0 wt%, more preferably 1.0 to 2.5 wt%.

Aggregated sludge produced in the aggregation equipment 3 is sent to the dehydrator 4 . The dehydrator 4 includes a thickener for thickening flocculated sludge to obtain thickened sludge and a concentrated treatment liquid, and a dehydrator for obtaining dehydrated sludge by dehydrating the thickened sludge.

The thickener is a device for solid-liquid separation of the dehydrated sludge that has been input, and for example, thickeners such as drum screens, gravity screens, and (oval) disk-type gravity screens can be suitably used. The thickened sludge obtained in the thickener is fed into the dehydrator. The concentrated treated liquid separated by the concentrator is supplied to the separated liquid tank 5 .

A dehydrator is a device for further removing water from thickened sludge thickened by a thickener to obtain dehydrated sludge, and for example, a screw, belt, filter, centrifuge, or the like can be used. In particular, by using a shaft-sliding type screw press dehydrator in which the screw shaft can slide back and forth as the dehydrator, thickened sludge can be stably dehydrated and dewatered sludge with a low water content, for example, a water content of 70% or less. can be obtained.

By using a dehydrator that can obtain dehydrated sludge with a low moisture content of 70% or less, the volume and weight of the generated dehydrated sludge can be reduced, and the cost of transporting it outside can be reduced. It can also be used as fuel for facilities such as waste incineration facilities. In addition, by dehydrating the thickened sludge before introducing it into the biological treatment facility 7 described later, when night soil is used as a treatment target, the BOD (biochemical oxygen demand) contained in the night soil, Since COD (Chemical Oxygen Demand), SS (Suspended Solids), TN (Total Nitrogen), TP (Total Phosphorus), etc. can be removed in advance, the pollutant load in the biological treatment facility 7 is reduced. can. The dehydrated separated liquid obtained by the dehydrator is supplied to the separated liquid tank 5 and stored therein.

An inorganic flocculant is added to the thickened sludge introduced into the dehydrator. By adding an inorganic flocculant to the thickened sludge, the strength of flocculated flocs in the thickened sludge is improved, so that dewatered sludge with a lower water content, specifically 70% or less, can be stably obtained.

As an inorganic flocculant, it reacts with the odorous gas that can be generated in a denitrification treatment system with a high mixing ratio of septic tank sludge, and can absorb and/or dissolve the odorous gas and improve the strength of flocculated flocs in thickened sludge. It is not particularly limited as long as it is a material that has the effect of causing the reaction, but for example, polyferric sulfate, ferric chloride, ferrous sulfate, polyaluminum chloride (PAC), aluminum sulfate (aluminum sulfate), etc. can be preferably used. Among them, by using an iron-based inorganic flocculant containing iron, sulfur-based odor components such as hydrogen sulfide and methylcaptan can be more efficiently deodorized.

If the amount of the inorganic flocculant added is too large, the amount of sludge may increase or the flocculation may be disrupted. The amount of the inorganic flocculant to be added varies slightly depending on the properties of the thickened sludge to be dewatered, but it should be 0.5 to 5.0 wt% relative to the solid dry weight (DS) of the thickened sludge to be added. is preferred, and 1.0 to 3.0 wt% is more preferred.

When an iron-based inorganic flocculant is used as the inorganic flocculant, the amount of residual iron in the dehydration separated liquid is preferably 0.1 mg/L or more. The amount of residual iron can be determined by the amount of inorganic flocculant added for efficient dehydration in the flocculation equipment 3 and the dehydration device 4 .

In order to improve the deodorizing efficiency of sulfur-based odor components, it is preferable that the amount of residual iron in the dehydration separation liquid is large. may become unbalanced, and the amount of sludge may increase. Considering the balance between dehydration treatment and deodorization treatment and efficient treatment in the entire system, the amount of residual iron in the dehydrated separated liquid in this embodiment is 0.1 to 10 mg / L. is preferred, and 0.5 to 3.0 mg/L is more preferred. As a result, the dehydrated separated liquid can be used as the liquid used for gas-liquid mixing in the deodorizing device 6, which will be described later, so that the deodorizing process can be made more compact.

The dehydrated separated liquid in the separated liquid tank 5 is supplied to the deodorizing device 6 via a pump or the like. The deodorizing device 6 removes odorous components generated in the deodorizing treatment system according to the embodiment of the present invention, such as sulfur-based odorous components such as hydrogen sulfide, methylcaptan, methyl sulfide and methyl disulfide, and water-soluble odorous components such as ammonia. Deodorize the gas contained.

The deodorizing device 6 is a gas that can react with the odorous component and/or dissolve the water-soluble odorous component into the dehydration separated liquid by bringing the gas containing the odorous component into contact with the liquid to mix the gas and the liquid. It is preferable to use a liquid-mixing deodorizing device. By adopting a gas-liquid mixed deodorizing device as the deodorizing device 6, it is possible to efficiently bring the gas containing the malodorous component into contact with the liquid. Compared with a deodorizing system using such a deodorizing device, the overall size of the deodorizing system can be reduced.

The gas-liquid mixing type deodorizing device 6 is provided with a channel inside the device, and is configured so that the gas containing the odorous component and the dehydrated separated liquid come into intense contact in the channel. As a result, the odorous components of the gas containing the odorous components are reacted with the inorganic coagulant in the dehydrated separated liquid, and/or the water-soluble odorous components are dissolved in the dehydrated separated liquid, and deodorized gas is produced outside the deodorizing device 6. to the

The deodorizing liquid produced by the deodorizing device 6 can be biologically treated, for example, by the biological treatment facility 7 shown in FIG. Details of the biological treatment facility 7 are not particularly limited. For example, the biological treatment facility 7 includes a denitrification tank 71 to obtain a denitrification solution by anaerobically denitrifying the deodorizing solution from the deodorizing device 6 by a denitrification reaction using heterotrophic bacteria; A nitrification tank 72 in which ammonium nitrogen contained therein is oxidized using autotrophic bacteria to obtain a nitrified liquid by nitrification, and a secondary denitrification tank 73 in which the nitrified liquid is further denitrified. A re-aeration tank 74 for further aerating the secondary denitrification treatment liquid obtained in the secondary denitrification tank 73 can be provided. The biological treatment liquid treated by the biological treatment facility 7 undergoes solid-liquid separation in the solid-liquid separation facility 100 .

The denitrification tank 71 supplies part of the organic wastewater and/or organic sludge contained in the storage tank 2 to the separation liquid tank 5 or the denitrification tank 71 when the pretreatment facility 10 is in operation. may be connected to the bypass line B1. The denitrification tank 71 may be connected to a bypass line B2 for mixing the dehydrated separated liquid contained in the separated liquid tank 5 with the deodorizing treatment liquid from the deodorizing device 6 and supplying the mixture into the denitrification tank 71 . By providing the bypass lines B1 and B2, maintenance and flow rate adjustment of the deodorizing treatment system according to the present embodiment can be easily performed, and stable treatment can be performed. The nitrified liquid in the nitrification tank 72 can be returned to the denitrification tank 71 via a return line L3.

The solid-liquid separation equipment 100 is a device for solid-liquid separation of the biological treatment liquid supplied from the reaeration tank 74, and any solid-liquid separation means such as gravity sedimentation, centrifugation, and flotation can be used. Separation, coagulation separation, membrane separation, etc. are available. An inorganic flocculant, a polymer flocculant, or the like may be added to improve separation efficiency. The separated liquid obtained by solid-liquid separation is sent to post-treatment. For example, when gravity sedimentation is used in the solid-liquid separation equipment 100, in the post-treatment, fine sludge that could not be removed by the solid-liquid separation equipment 100 is aggregated to obtain supernatant water and precipitated sludge. is done. After that, SS, COD, pigments, etc. are removed by sand filtration treatment or activated carbon adsorption treatment, and further disinfection is performed with hypochlorous acid or the like.

A storage tank return line L1 is connected to the solid-liquid separation equipment 100 . The separated sludge obtained in the solid-liquid separation equipment 100 is sent via the storage tank return line L1 to the storage tank 2 for storing the organic wastewater and/or organic sludge to be supplied to the flocculation equipment 3. If there is no 2, it is returned to the receiving tank 1. When an inorganic flocculant is added in the solid-liquid separation equipment 100, unreacted inorganic flocculant remains in the separated sludge. of the inorganic flocculant can be reused, and as a result, the amount of inorganic flocculant used in the entire dehydration device 4 and the deodorizing treatment system can be reduced.

The storage tank return line L1 may further include a return line L2 for returning at least part of the separated sludge to the denitrification tank 71 . Organic waste water and/or organic sludge can be treated more stably by appropriately adjusting the return destination and return amount of the separated sludge according to the properties of the object to be treated. Although not shown, the separated sludge obtained by the solid-liquid separation equipment 100 is temporarily stored in another tank of the sludge storage tank before being stored in the storage tank 2, and then sent to the storage tank 2. good too.

The return line L3 may further include a supply line L4 for supplying at least part of the nitrified liquid to the deodorizing device 6. Moreover, the return line L2 may further include a return line L5 for supplying at least part of the separated sludge to the deodorizing device 6 . In the solid-liquid separation equipment 100, an inorganic flocculant or a polymer flocculant is added in order to improve the efficiency of solid-liquid separation, so the inorganic flocculant remains in the separated sludge. Further, in the present embodiment, since at least part of the separated sludge containing the remaining inorganic flocculant is returned to the denitrification tank 71, the inorganic flocculant also remains in the nitrification liquid. By supplying at least part of the separated sludge and nitrified liquid to the deodorizing device 6, the deodorizing treatment system as a whole can perform the deodorizing treatment more efficiently.

According to the first embodiment of the present invention, a dehydrated separation liquid containing an inorganic flocculant obtained by dehydration treatment of organic wastewater and/or organic sludge is mixed with a gas containing an odor component in a gas-liquid manner. Therefore, since it is not necessary to add a new inorganic flocculant for deodorizing treatment in the deodorizing device 6, the amount of the inorganic flocculant to be added can be reduced. In addition, by subjecting the organic wastewater and/or organic sludge to coagulation treatment and dehydration treatment in advance before being sent to the biological treatment facility 7, BOD, COD, and BOD contained in the organic wastewater and/or organic sludge can be Since substances such as SS, TP, and TN can be removed in advance, the pollution load on the biological treatment facility 7 can be reduced, and a more efficient system can be realized.

(Second embodiment)
As shown in FIG. 2, in the deodorizing system according to the second embodiment of the present invention, after adding an inorganic flocculant to organic wastewater and/or organic sludge, a polymer flocculant is added to flocculate sludge. a dehydrator 4 for dehydrating the flocculated sludge to obtain a dehydrated sludge and a dewatered separated liquid, and a gas-liquid mixture of the dehydrated separated liquid containing an inorganic flocculant and a gas containing an odorous component. a deodorizing device 6 for reacting an odorous component with an inorganic flocculant and/or dissolving a water-soluble odorous component in a dehydration separated liquid for deodorization, thereby obtaining a deodorized gas and a deodorized liquid; and a biological treatment facility 7 for biologically treating the

That is, the deodorizing system according to the second embodiment differs from the deodorizing system according to the first embodiment in that the flocculation equipment 3 adds an inorganic flocculant and a polymer flocculant. Others are substantially the same as those of the deodorizing system according to the first embodiment, so redundant description is omitted.

The organic wastewater and/or organic sludge stored in the storage tank 2 is sent to the aggregation facility 3 via a pump or the like. In the flocculation facility 3, the organic waste water and/or organic sludge are agitated and mixed to form flocculated flocs to produce flocculated sludge, which is then treated to facilitate solid-liquid separation. For example, first, an inorganic flocculant is added to the first flocculating tank to form microflocs that easily flocculate in the tank. After that, a macromolecular flocculant is added to the second flocculation tank connected to the rear stage of the first flocculation tank to crosslink the fine flocs and form coarse flocs in the tank.

In the second embodiment, phosphorus contained in organic wastewater and/or organic sludge can be removed by adding a polymer flocculant after adding an inorganic flocculant. Also, since the flocs are stronger, the separated liquid can be made cleaner.

Depending on the properties of the organic wastewater and/or organic sludge, in the first flocculation tank of the flocculation equipment 3, the solid dry weight (DS) of the organic wastewater and/or organic sludge is 2.0-7. 0 wt%, more preferably 4.0-5.0 wt% inorganic flocculant can be added. In the second flocculation tank of the flocculation equipment 3, 0.5 to 3.0 wt%, more preferably 1.0 to 2.5 wt% of solid matter dry weight (DS) of organic wastewater and / or organic sludge A polymeric flocculant can be added.

In the second embodiment, the example in which the coagulation equipment 3 has two coagulation tanks has been described, but it is of course possible to have a single coagulation tank or two or more coagulation tanks.

(Third Embodiment)
In the deodorizing system according to the third embodiment of the present invention, the dehydrator 4 includes a thickener for thickening flocculated sludge to obtain a thickened sludge and a concentrated treated liquid, and an inorganic flocculant added to the thickened sludge for dehydration. It is equipped with a dehydrator that obtains dehydrated sludge having a moisture content of 70% or less and a dewatered separated liquid by treatment, and as shown in FIG. 3, at least part of the concentrated treated liquid obtained by the thickener is stored. Equipped with a phosphorus undiluted solution tank 81 and a phosphorus recovery device 82 for recovering magnesium ammonium phosphate (MAP) from the concentrated treated liquid, and the separation liquid tank 5 recovers the MAP and sends the recovered liquid to the deodorizing device for dehydration separation. It differs from the deodorizing system according to the first embodiment in that it is mixed with liquid and stored. Others are substantially the same as the configuration of the deodorizing treatment system according to the first embodiment, so the description is omitted.

The concentrated treated liquid stored in the phosphorus undiluted liquid tank 81 is sent to the phosphorus recovery device 82 via a pump or the like. The phosphorus recovery device 82 utilizes the crystallization phenomenon of MAP generated by the reaction of phosphate ions, ammonium ions and magnesium ions, and adds a magnesium source to the concentrated treatment liquid containing phosphorus and ammonium ions to supersaturate the liquid. It is an apparatus for bringing MAP into contact with seed crystals in a state, crystallizing MAP on the surface of the seed crystals, and recovering the MAP.

Magnesium chloride, magnesium hydroxide, etc. can be used as the magnesium source to be added. As the phosphorus recovery device 82, two or more crystallization tanks may be arranged in series or in parallel, and the specific configuration is not particularly limited. The post-recovery liquid after MAP recovery is sent to the separated liquid tank 5, and a part of the concentrated treated liquid sent to the phosphorus undiluted liquid tank 81 may be supplied to the separated liquid tank 5 via a pump or the like. .

According to the deodorization treatment system according to the third embodiment of the present invention, dehydrated sludge produced by the dehydrator while efficiently recovering MAP useful as a chemical fertilizer from organic waste water and/or organic sludge. can achieve low moisture content and volume reduction.

(Fourth embodiment)
As shown in FIG. 4, the deodorizing treatment system according to the fourth embodiment of the present invention dilutes the deodorizing treatment liquid from the deodorizing device 6 with dilution water instead of the biological treatment facility 7 shown in FIG. A discharge water tank 9 for storing sewage discharge water to be discharged to the sewage system is provided. A bypass line B2 from the separation liquid tank 5 is connected to the discharge water tank 9 . In the discharge water tank 9, the water is discharged into the sewage system via a pump or the like after being subjected to a predetermined dilution process so as to satisfy the discharge standards. Others are substantially the same as the configuration of the deodorizing system according to the first embodiment, so the description is omitted.

As shown in FIG. 5, the flocculation equipment 3 is similar to the flocculation equipment 3 shown in FIG. Also good. Further, as shown in FIG. 6, it has the same configuration as the phosphorus undiluted solution tank 81, the phosphorus recovery device 82, and the separated liquid tank 5 as shown in FIG. you can go

(Other embodiments)
Although the present invention has been described by the above embodiments, the statements and drawings forming part of this disclosure should not be understood to limit the present invention. Various alternative embodiments and operational techniques will become apparent to those skilled in the art from this disclosure.

For example, as shown in FIG. 7, two or more biological treatment facilities 7 branching from a storage tank 70 or the like storing the deodorizing treatment liquid may be installed side by side. Further, the deodorizing treatment system shown in FIGS. 1 to 6 shows an example in which a single receiving tank 1, storage tank 2, aggregation equipment 3, dehydrator 4, separated liquid tank 5 and deodorizing apparatus 6 are provided. , of course, may be arranged in plurality.

Further, for example, in the examples of FIGS. 2 and 5, an inorganic flocculant is added in the flocculation equipment 3, and the presence or absence of addition is not specified in the dehydration equipment 4, but the organic wastewater and / or organic wastewater to be treated Depending on the properties of the sludge, it is also possible to add an inorganic flocculant to the dehydrator 4 .

In this way, the present invention is represented by the matters specifying the invention in the scope of claims that are valid from the above disclosure, and can be modified and embodied in the implementation stage without departing from the gist of the invention.

DESCRIPTION OF SYMBOLS 1... Receiving tank 1a... Settling tank 2... Storage tank 3... Aggregation equipment 4... Dehydration apparatus 5... Separation liquid tank 6... Deodorization apparatus 7... Biological treatment equipment 9... Discharge water tank 10... Pretreatment equipment 70... Storage tank 71... Denitrification tank 72... Nitrification tank 73... Secondary denitrification tank 74... Re-aeration tank 81... Phosphorus stock solution tank 82... Phosphorus recovery apparatus 100... Solid-liquid separation equipment B1, B2... Bypass line L1... Storage tank return line L2, L3... Return line L4 , L5... supply line

Claims (6)

Organic wastewater containing at least night soil or septic tank sludge and/or a dewatered separation liquid containing an inorganic flocculant obtained by dehydrating flocculated sludge obtained by flocculating organic sludge and biological treatment The dehydration-separated liquid is mixed with a gas containing an odorous component to cause the odorous component to react with the inorganic coagulant and/or dissolve the water-soluble odorous component into the dehydration-separated liquid. a deodorizing system comprising a deodorizing device for obtaining a deodorizing gas and a deodorizing liquid. 2. The deodorizing system according to claim 1, further comprising a separated liquid connected to said deodorizing device and storing said dehydrated separated liquid to be supplied to said deodorizing device. 3. The deodorization treatment system according to claim 1, wherein the amount of residual iron in said dehydration separated liquid supplied to said deodorization device is 0.1 to 10 mg/ L . Organic wastewater containing at least night soil or septic tank sludge and/or a dewatered separation liquid containing an inorganic flocculant obtained by dehydrating flocculated sludge obtained by flocculating organic sludge and biological treatment The dehydration-separated liquid is mixed with a gas containing an odorous component, thereby reacting the odorous component with the inorganic coagulant and/or dissolving the water-soluble odorous component into the dehydration-separated liquid. a deodorizing device for obtaining a deodorizing gas and a deodorizing liquid;
a discharge water tank for storing the sewage effluent for diluting the deodorizing treatment liquid discharged from the deodorizing apparatus with dilution water so as to satisfy the standards for discharge to the sewer as it is , and for discharging the sewage to the sewage ;
A deodorizing treatment system. Organic wastewater containing at least night soil or septic tank sludge and/or a dewatered separation liquid containing an inorganic flocculant obtained by dehydrating flocculated sludge obtained by flocculating organic sludge and biological treatment By mixing the dewatered separated liquid that has not been dehydrated and separated with a gas containing an odorous component, the odorous component is caused to react with the inorganic coagulant and/or the water-soluble odorous component is dissolved in the dehydrated separated liquid. A method for treating organic matter, comprising a step of deodorizing with 6. The method for treating organic matter according to claim 5, further comprising a step of diluting the dehydrated separated liquid with diluent water and discharging it into a sewage system.

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