KR20060097871A - Apparatus and method for treating wastewater - Google Patents

Abstract

Provided are a sewage treatment apparatus and method for constructing an aeration-aerobic tank through sedimentation and intermittent circulation of sludge while treating sewage or sewage and wastewater with an activated sludge method.

The sewage treatment apparatus of the present invention is provided with at least one anaerobic storage tank in which sewage is introduced, and at least one being connected to the anaerobic storage tank, and having an acid nozzle for circulating the surface of the treated water and releasing the surface. An aeration-anoxic tank in which an aerobic-anoxic reaction of the sludge is made, including a concentrated aeration pipe and a sludge diffusion means for intermittently diffusing sludge in the sedimentation zone away from the treatment water inflow zone of the aerobic concentration aeration pipe, and the aeration-aerobic tank It consists of a sedimentation tank which is arranged in conjunction with and enables the sedimentation and discharge of treated water.

According to the present invention, sewage treatment is carried out by using floating and adherent microorganisms while making an aerobic environment of sludge (microorganism) through a concentrated bomber and an anoxic environment through sludge settling in one tank. While maintaining the efficiency stable, it is possible to reduce the size of the sewage treatment plant to obtain an improved effect of reducing the construction and operating costs.

Sewage treatment, activated sludge method, aeration-anaerobic tank, aerobic, anaerobic, anaerobic

Description

Apparatus and Method for Treating Wastewater

1 is a configuration diagram showing the overall configuration of the sewage treatment apparatus according to the present invention

Figure 2 is a plan view of Figure 1 showing the present inventors sewage treatment apparatus

3 is a main configuration diagram showing an aeration-anoxic tank of the present invention sewage treatment apparatus.

Figure 4 shows the microbial contact medium used in the aeration-anoxic tank of the present invention sewage treatment apparatus,

(a) is a perspective view

(b) shows the installation state

5 is a perspective view illustrating main parts of a rectifying wall installed in a sedimentation tank of the present invention sewage treatment apparatus.

6 shows a sludge conveying unit installed in the sedimentation tank of the present invention sewage treatment apparatus,

(a) is the front structural diagram

(b) side view

(c) shows the operating state

7 shows the filter unit of the sewage treatment apparatus of the present invention,

(a) is a perspective view

(b) is a schematic diagram

(c) is a schematic diagram showing that an air diffuser nozzle is installed in the lower part of the filter unit.

(d) is a schematic diagram showing the backwash and discharge structure

Explanation of symbols on the main parts of the drawings

1 .... sewage treatment unit 10 .... anaerobic storage tank

30 .... Focused bomber 32 .... Air nozzle

34,36 .... Outlet and inlet 50 .... Sludge diffusion means

52 .... Air pipe 54 .... Air spray nozzle

70 .... Aeration-Anoxic Tank 90 ... Sedimentation Tank

92 .... bulkhead 110 .... microbial contact media

130 .... Settling zone 150 .... Discharge zone

170 .... commutation wall 190 .... sludge return unit

210 .... Filter Unit

The present invention relates to a sewage treatment apparatus for treating sewage, sewage, and wastewater by an active sludge method, and more specifically, an aerobic environment of sludge (microbial) through a concentrated bomber and an anoxic environment through sludge settling. By using floating and adherent microorganisms, the sewage treatment efficiency can be kept stable while reducing the size of the sewage treatment facility while reducing the cost of construction and operation as well as additional filter units. It relates to a sewage treatment apparatus and method for discharging the treated water through the.

Pollutants in sewage, sewage, and wastewater are largely divided into organic matter expressed in biochemical oxygen demand (BOD) and chemical oxygen demand (COD) and nutrients nitrogen and phosphorus.

Up to now, the sewage treatment facility has been mainly treated with organic matter, and much of the nutrients nitrogen and phosphorus cannot be removed, but are discharged to rivers, lakes, or oceans.

However, if large amounts of nitrogen and phosphorus are discharged into sewage, eutrophication occurs in rivers and lakes, and if it enters the ocean, it causes red tide.

In addition, if this eutrophication is severe, the odor is severe, the water pollution is increased, and the use of drinking water and waterways is also restricted.

Therefore, in order to prevent such subsidence of the water system, nitrogen compounds or phosphates, which are nutrients, should be sufficiently removed in the sewage treatment plant.

On the other hand, the active sludge method for such sewage treatment is anaerobic tnk, anoxic tank, anoxic tank and anoxic tank to remove nitrogen compounds or phosphates which are the nutrients described above. The sewage treatment is then carried out through biological reaction steps using a sedimentation tank.

For example, in an aeration tank where oxygen is supplied, organic nitrogen or ammonia nitrogen is oxidized to nitrate nitrogen, and in an anoxic tank where free oxygen is not supplied, nitrate nitrogen is reduced to nitrogen gas and denitrification is released into the atmosphere. In an anaerobic tank, phosphorus is released from activated sludge.

In addition, the phosphorus component thus released is excessively ingested by the microorganisms activated in the aerobic tank and the microorganisms ingesting the phosphorus are removed with excess sludge, thereby finally obtaining treated water from which nitrogen and phosphorus are removed.

However, in such a conventional sewage treatment facility, since several anaerobic, anoxic, aeration and sedimentation tanks must be provided, since the installation scale is large, a substantial cost must be invested in the actual installation and operation of the sewage treatment plant. Or in an environment where small sewage treatment is desired.

In addition, the processing time was also delayed by at least six hours.

As a result, the conventional sewage treatment method which treats sewage biologically through the reaction stage of anaerobic (aerobic tank), anoxic (anoxic) tank, and aerobic (aerobic tank) through several tanks is very expensive due to excessive investment, increase of operating cost and treatment time. It was uneconomical.

Therefore, it would be desirable to construct an aeration-aerobic tank that performs anoxic and aerobic reactions intermittently in one tank to reduce the number of anaerobic, anaerobic and aerobic installations, since the size and treatment time of the sewage treatment plant are reduced.

For example, in an aeration tank, air is supplied to the sewage during the sewage treatment, so that the treated water and the air are sufficiently brought into contact with each other to promote the oxidation of the sewage and digestion by the aerobic bacteria.

At this time, the microorganism is to remove the carbon dioxide, hydrogen sulfide, methane gas and the like by the digestion action.

On the other hand, instead of simply blowing air through the diffuser into the aeration tank, a method of using an explosive pipe that increases the oxygen contact through the diffuser inside the tube to circulate the treated water in the tank and the surface spray after circulation is known.

However, in the case of using such aeration pipe, only sludge adjacent to the treated water inflow area of the aeration pipe is circulated among the sludge settled in the aeration tank, so that the sludge in the precipitation zone that is more than a certain distance from the aeration pipe is kept in a settled state. This, in turn, causes sludge to decay in the tank if the sludge is inadequate and causes secondary pollution.

Accordingly, by installing the aeration pipe disposed inside the aeration nozzle in the aeration tank to provide an aerobic reaction environment through the circulation of sludge during the aeration of the treated water, by intermittently injecting air to the sedimentation area that is not circulated out of the aeration pipe, The total equipment size of the sewage treatment apparatus is operated by operating the aeration-aerobic tank that provides an aerobic and anoxic environment in one reactor by preventing the sludge from rotting through the circulation after the diffusion of the sludge and maintaining the anoxic environment in the settling sludge area. Would be preferable because is reduced and economical.

In addition, it would be more desirable to install microbial contact media in the aeration-aerobic tank to further increase the sewage treatment efficiency by using adherent microorganisms and suspended microorganisms.

In addition, if the sludge conveying treatment in the settling tank is assured, the quality of the discharged water is improved, which is more preferable.

The present invention has been made in order to improve the conventional problems as described above, the object is to operate the aeration-oxygen tank while treating the sewage through a biological reaction, so that the aerobic-oxygen tank environment is implemented in one tank, sewage treatment It is to provide a sewage treatment apparatus that reduces costs while reducing the size of the facility, and facilitates the operation of the facility and maintains the sewage treatment efficiency stably.

In addition, another object of the present invention is to provide a sewage treatment apparatus that utilizes adherent and floating microorganisms to increase the sewage treatment efficiency in an aerobic reaction, and discharge through the filter unit to further improve the water quality of the treated water. Is in.

In addition, another object of the present invention is to nitrate organic nitrogen or ammonia nitrogen and release and release nitrate nitrogen into the atmosphere while constructing an aerobic anoxic reaction environment in one tank through intermittent diffusion of sludge in an aeration-aerobic tank. It is to provide a sewage treatment method to remove sewage by treating sewage through denitrification and linking a storage tank to an anaerobic tank.

As a technical aspect for achieving the above object, the present invention, the anaerobic storage tank in which sewage is introduced and phosphorus is released from the microorganism;

At least one and installed in connection with the anaerobic storage tank, and provided with an acid nozzle for enabling circulation and surface ejection of the treated water therein, and at least one concentrated aeration engine, and in the treatment water inlet area An aeration-anoxic tank in which an aerobic-aerobic reaction of the sludge is carried out, including sludge diffusion means for intermittently diffusing the sludge in the sedimentation zone that has been released; And,

A settling tank disposed in association with the aeration-free oxygen tank to allow settling and discharge of the treated water;

Provides a sewage treatment apparatus consisting of.

In another aspect, the present invention, in the anaerobic storage tank in which sewage is introduced, the phosphorus is released from the sludge, the released phosphorus is excessively ingested by the activated microorganisms in the aeration-aerobic tank, and through the removal of excess sludge Is removed; And,

The sludge is intermittently diffused through the sludge diffusion means in the aeration-aerobic tank disposed in association with the anaerobic storage tank, and the diffused sludge is circulated through the concentrated bomber with treated water to provide an aerobic environment for nitrification, and the diffusion of the sludge is When stopped, the nitrogen-free environment in which the denitrification is made in the sludge of the precipitation zone is repeatedly provided to remove nitrogen;

Provides a sewage treatment method comprising a.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 1 and FIG. 2 show the whole structure of the sewage treatment apparatus 1 which concerns on this invention.

That is, the sewage treatment apparatus 1 of the present invention is largely composed of an anaerobic storage tank 10, an aeration-aerobic tank 70, and a precipitation tank 90.

Therefore, compared with the conventional biological sewage treatment facilities consisting of inflow tank, anaerobic tank, anaerobic tank, and anaerobic tank, and sedimentation tank, the sewage treatment efficiency remains stable while providing economic advantages in terms of construction, operation, and cost. do.

On the other hand, the anaerobic storage tank 10 and the aeration-oxygen tank 70 and the sedimentation tank 90 of the sewage treatment apparatus 1 of the present invention will be described in detail.

First, as shown in FIGS. 1 and 2, the anaerobic storage tank 10 receives raw water (inflow sewage) from which constrictions or other foreign substances having a large particle size are introduced through the screen device 12.

At this time, phosphorus is released from the microorganisms contained in the raw water in the anaerobic storage tank 10, the phosphorus released as described above is introduced (overflow) into the aeration-oxygen tank 70 to be described later, and thus oxygen supply is increased. Microorganisms (adherent and floating microorganisms) activated by the aerobic reaction in the aeration-aerobic tank 70 overingest phosphorus, and excess sludge ingested in excess of phosphorus is recovered and removed in the next settling tank 90 to finally remove phosphorus. Is done.

Meanwhile, as illustrated in FIGS. 1 and 2, the conveying pipe 200 connected to the sludge conveying unit 190 of the sedimentation tank 90 described in detail below is connected to the anaerobic storage tank 10 to be sludge. By carrying out, the release of phosphorus is made more smooth, and, thereby, phosphorus removal efficiency can be improved.

Next, FIGS. 1 to 3 show the aeration-anoxic tank 70 of the sewage treatment apparatus 1 of the present invention. The aeration-anoxic tank 70 of the present invention, in which sewage flows in and discharge of phosphorus is made. At least one branch is installed in conjunction with the anaerobic storage tank (10), at least one is provided with an acid nozzle (32) to enable the circulation and surface injection of the treated water on the inner side of the concentrated width pipe 30 and , Aerobic anoxic-free of sludge (microorganism), including sludge diffusion means 50 for intermittently spreading the sludge S in the sedimentation zone (T) deviating from the treated water inlet area (A) of the acid intensive concentration pipe (30) Sewage is treated with repeated cycles of reaction.

At this time, as shown in Figure 3, the concentrated aeration pipe 30 of the aeration-aerobic tank 70, the injection hole 34 and the inlet hole (up and down) to enable the inflow and surface injection of the treated water ( 36, wherein the diffuser nozzle 32 is disposed in connection with an air supply pipe 32a at an upper portion of the inlet hole 36 in the lower side of the concentrated width pipe 30, and in the air supply pipe 32a. Air supply equipment, such as a blower which is not shown in figure, is connected.

Therefore, as shown in FIG. 3, when sewage (or wastewater), which has passed through an anaerobic storage tank, flows into the aeration-aerobic tank 70, it is injected through the internal diffuser nozzle 32 of the concentrated aeration pipe 30. The concentrated aeration by the high pressure air is made, and the treated water flowing through the inlet hole 36 rises through the concentrated aeration pipe 30 and at the water surface or at the top thereof depending on its position through the blower hole 34. To be attached.

As a result, as the oxygen supply is smooth, activation of the microorganisms included in the treated water is achieved, and the amount of dissolved oxygen can be increased rapidly.

Then, nitrification is performed to oxidize the organic nitrogen or ammonia nitrogen contained in the sewage with nitrate nitrogen to remove nitrogen through denitrification in the following anoxic environment.

At this time, as shown in Figure 3, because the concentrated width pipe 30 is mixed with the bubbles generated by the organic matter and sedimentable solids (SS), etc. contained in the treated water, because it is processed through the precipitation in the settling tank To increase the precipitation efficiency.

That is, when high pressure air is injected through the diffuser nozzle 32 inside the concentrated aeration pipe 30, the treated water (sewage) flowing into the pipe through the inlet hole 36 of the concentrated aeration pipe 30 is water. Since a large amount of bubbles (bubbles) are generated when ejected through the discharge hole 34 while being forced up and circulated in the plane, organic matter and solids contained in the sewage can be adsorbed to such bubbles.

Therefore, the concentrated aeration pipe 30, at least one of which is installed vertically in the aeration-aerobic tank 70 of the present invention, increases the purifying ability by the self-cleaning action through the forced circulation of the treated water, and simultaneously circulates the treated water. To increase the amount of dissolved oxygen by blowing it into a bubble state on the surface of the water, and the particulate matter, that is, organic matter or sludge (generated sludge) is adsorbed and agglomerated into the bubble (bubble), thereby increasing the treatment efficiency through precipitation.

In addition, the circulation of the treated water increases the oxygen demand of the microorganism, and also promotes the degassing of volatile gases such as ammonia dissolved in the sewage into the atmosphere.

On the other hand, looking at the biological reaction, as shown in Figure 3, the area (H1) (T) in which the sludge (S) is precipitated is not supplied with air, the inflow circulation of the treated water through the centralized explosion pipe 30 Since the sludge does not flow even in the city, an oxygen-free reaction environment is formed. On the contrary, in the region H2 where the sludge circulation is smooth through the circulation of the treated water or the sludge diffusion means 50 which will be described later, the aerobic exhalation is smooth. Maintain the reaction environment.

Therefore, in the aeration-aerobic tank 70 of the present invention, the aerobic environment in the circulating area H2 of the treated water and sludge and the anoxic environment of the settling area H1 (T) are one by the concentrated aeration pipe 30. May be provided in the bath.

Next, in Figures 1 to 3 intermittent sludge diffusion means 50 of the present invention is provided in the aeration-oxygen tank 70 of the present invention to provide an aerobic environment and an oxygen-free environment in the sludge sedimentation state portion according to the actual sludge circulation (50) )

That is, as shown in Figures 2 and 3, the sludge diffusion means 50 of the present invention is concentrated in the sludge sedimentation zone (T) deviated from the adjacent treated water inlet area (A) of the concentrated width pipe (30). The air pipe 52 disposed in the air pipe 52 and the air pipe 52 provided in the air pipe 52 forcibly diffuse the settling sludge during the air spraying to enable circulation through the concentrated aeration pipe, thereby providing an aerobic environment by activating the sludge. The nozzle 54 is comprised.

In this case, as shown in FIG. 3, the blower 56 connected to the air pipe 52 and supplying air is electrically connected to the controller 58 to enable periodic intermittent supply of air.

That is, the sludge diffusion means 50 of the present invention, while being installed on the inner bottom side of the aeration-oxygen tank 70, is settled out of the treated water inlet area (A) flowing into the concentrated aeration pipe 30 The sludge S in the sedimentation zone T, which is difficult to circulate in the furnace and is easily decayed, is intermittently forcibly diffused so that the sludge diffused in the treated water together with the treated water is circulated, thereby enabling the sludge to be activated.

In particular, intermittent operation allows the periodic conversion of the oxygen-free oxygen-free environment by blocking the aerobic environment and circulation through the diffusion and circulation of sludge.

For example, as shown in FIG. 3, in the aeration nozzle 32 of the concentrated aeration pipe 30 in the aeration-aerobic tank 70 of the present invention, high-pressure air is continuously sprayed for 24 hours to eject the surface of treated water. When the air is injected to the bottom of the tank through the sludge diffusion means 50 for 5 minutes at intervals of 30-90 minutes, preferably 60 minutes, while treating the sewage, sedimentation sludge in the sludge sedimentation zone (T) While maintaining an anoxic environment, the sludge spreads and circulates for 5 minutes during which the sludge spreads and becomes an aerobic environment in which the sludge is activated throughout the tank. Sludge of T) becomes an oxygen-free environment.

At this time, if the operation period of the sludge diffusion means 50 is shorter than 30 minutes, the sludge is not precipitated after diffusion, so that an oxygen free environment is not formed in the precipitation zone T, and if it is longer than 90 minutes, the sludge diffusion-circulation is performed. The spacing of the exhalation environment through is long, making it difficult to effectively treat sewage, most preferably at 60 minute intervals.

In addition, the operating time of the sludge diffusion means 50 may be about 5 minutes, since the sludge in the sedimentation zone T may be diffused as air spraying to enable circulation through the concentrated width engine 30.

Therefore, the crude material becomes an aerobic environment for about 5 minutes at intervals of about 30-90 minutes, and during the rest of the time, an anoxic environment is formed by sludge settling, and nitrogen removal through nitrification and denitrification is performed in one aeration-aerobic tank (70). Can be done in

Next, FIGS. 3 and 4 illustrate a microbial contact medium 110 that is additionally provided to the aeration-anoxic tank 70 of the present invention.

At this time, the microbial contact medium 110, as shown in Figure 4, provided between the support pipes 112, 114 of the upper and lower, while being composed of a filter cloth woven with synthetic resin micro sand to which the adherent microorganism is attached And may be placed in at least one of the vessels.

Thus, as shown in Figures 3 and 4, the contact medium 110 is attached to the adherent microorganism (M1) contained in the treated water, and nitrification with the floating microorganism (M2) contained in the treated water By making excess intake of phosphorus smooth, the nitrogen and phosphorus removal efficiency is improved.

At this time, as shown in Figure 4, if the upper support pipe 112 of the support pipe is fixed across the rough wall, the lower support pipe 114 is to be supported across the center of the contact medium 110, The contact medium 110 will increase the adhesion of microorganisms while being kept in a taut state.

Next, FIG. 1 and FIG. 2 show the sedimentation tank 90 of the sewage treatment apparatus 1 of the present invention, and the sedimentation tank 90 of the present invention is disposed in association with the aeration-oxygen tank 70 and treated. It is configured to enable precipitation and discharge of water.

At this time, the settling tank 90 may be separated into a settling zone 130 and a discharge zone 150 through the partition wall 92 provided therein.

That is, the excess sludge which has been excessively ingested with phosphorus contained in the treated water introduced into the aeration-aerobic tank 70 is precipitated in the settling tank 90 and disposed of or disposed of as described above, or returned to the anaerobic storage tank 10. Can be conveyed using the tube (200).

At this time, as shown in Figure 1 and 5, the rectification wall 170 to increase the sedimentation in the precipitation zone 130 in the precipitation zone 130 is separated into the partition wall 92 of the precipitation tank 90. This is preferably provided.

On the other hand, as shown in Figure 5, the rectifying wall 170 is formed with a plurality of holes 172, such a hole 172 is preferably a bottom reduction type that the inlet area is wider and the outlet area is narrower Is provided.

Thus, as shown in FIG. 5, when the treated water passes through the holes 172 of the rectifying wall 170, the flow of water collides with each other downwards, which is a result of the sludge (surplus sludge) contained in the treated water. Smooth out the settling.

Next, as shown in FIG. 2 and FIG. 6, between the rectifying wall 170 and the partition wall 92 of the sedimentation region 130, a sludge conveying unit for disposing of the sludge or conveying it to the anaerobic storage tank 10 ( 190 is provided.

At this time, the sludge conveying unit 190, the unit body 194 that moves back and forth along the rail 192 at the bottom of the sedimentation tank, and the unit body 194 is connected to the operation unit is installed in an endless track form on the sedimentation tank A wire 196 and a hose 198 connected to the unit body 194, and a conveying pipe 200 and a waste pipe 202 connected thereto may be included.

In addition, although FIG. 1 illustrates that the conveying pipe 200 is connected to the anaerobic storage tank 10, the conveying pipe 200 may also be connected to the aeration-anoxic tank 70 to enable conveyance of sludge. And, in this case, the returned sludge will smoothly perform intake and nitrification and denitrification in the aeration-aerobic tank 70.

1 and 6, the sludge conveying unit 190 of the present invention is a part of the sludge (surplus sludge) precipitated in the sedimentation region 130 of the sedimentation tank 90 through the waste pipe 202. Disposal or sludge conveyance to the anaerobic storage tank 10 through the conveyance pipe 200 is possible.

In particular, the transfer unit 190 of the present invention, as shown in Fig. 6B, the drive pulley 196c on the drive shaft 196b driven by the motor 196a and the other pulleys 196c disposed on the upper and lower sides and the front and rear sides of the tank. Operating wires 196, which move in a caterpillar, are connected to the unit body 194, which is provided to be movable while moving along the rail 192.

In this case, the operation wire 196 is shown to be connected to both sides of the center of the unit body 194, this operation wire 196 may be connected to both sides of the unit body.

Therefore, the conveying unit 190 of the present invention, as shown in Figure 6c, can be transported without leaving the sludge (S) precipitated at the bottom of the sedimentation tank sedimentation zone 130 over all parts of the sedimentation tank bottom. This will improve the quality of the effluent through the settling tank.

At this time, the unit body 194 of the transfer unit 190, the reciprocating movement in the bottom of the sedimentation tank, the drive motor 196a for moving the operation wire 196 for this purpose uses a motor capable of forward and reverse rotation. .

Next, as illustrated in FIGS. 1, 2, and 7, the discharge area 150 of the sedimentation tank may further include a filter unit 210 to improve the quality of the discharged water.

At this time, as shown in Figure 7, the filter unit 210 of the present invention is disposed in the unit body 214 and the unit body 214 is provided with a pipe connector 212 to enable the discharge of the treatment water treatment It is composed of a melbrane filter member 216 that blocks contaminants such as bacteria when passing through water.

Therefore, as shown in FIGS. 1 and 7, the treated water is discharged through the discharge pipe 220 connected to the pipe connector 212 of the filter unit 210, and at this time, while passing through the melbrane filter member 216. Bacterial microorganisms or other sludge contained in the effluent may be filtered to improve the quality of the final effluent.

At this time, the membrane filter member 216 is a paper filter (membrane) 216a attached to the outside of the unit body 214 and a resin filter (membrane) 216b attached to the inside thereof, as shown in FIG. 7B. Etc., such membrane filter elements are known.

On the other hand, as shown in Figure 7c, by installing an air diffuser 222 for injecting air in the lower portion of the filter unit 210 to intermittently inject air on the filter unit 210, filter unit 210 It is possible to prevent clogging of the filter member due to the constriction attached to the membrane filter member 216 of the membrane, and at the same time, it may be possible to improve the water quality by increasing the amount of dissolved oxygen by supplying oxygen from the precipitation tank.

Alternatively, as shown in FIG. 7D, when the backwashing pipe 220a connected to the blower B branched to the discharge pipe 220 of the filter unit 210 is connected, the filter unit is supplied by the air supplied to the reverse side. The constriction attached to the membrane filter member 216 of 210 may be reversed to prevent clogging of the filter member.

Meanwhile, referring to the sewage treatment method using the sewage treatment apparatus 1 of the present invention described above, as shown in FIGS. 1 and 2, phosphorus is released from the sludge in the anaerobic storage tank 10 and the phosphorus released The phosphorus removal step of overingestion by the microorganisms activated in this aeration-aerobic tank 70 and removal of excess sludge is performed.

In addition, the treated water in the tank is discharged from the surface after circulation through the concentrated aeration pipe 30 of the aeration-aerobic tank 70, and the organic matter and the constriction in the treated water are bubble-adsorbed, and the microorganisms in the treated water circulated and ejected are activated and organically Nitrogen removal step is carried out through the aerobic reaction of nitrification in which nitrogen or ammonia nitrogen is oxidized to nitrate nitrogen and the denitrification reaction by sludge which does not supply oxygen in the non-circulating sedimentation zone (T). Lose.

In addition, the nitrogen removal step is repeated intermittently an aerobic environment through the anoxic environment in the sedimentation zone (T) of the sludge and the sludge diffusion and activation through the sludge diffusion means 50 and the concentrated aeration pipe 30 and the activation at the time of circulation .

For example, the sludge spreads for 5 minutes in a period of 30 minutes to 90 minutes, while increasing the sludge circulation through the concentrated bomber while spreading the sludge in the tank, making the entire environment in the tank an aerobic reaction environment. Allow denitrification to an anoxic reaction environment of the sludge being precipitated.

Therefore, according to the sewage treatment method of the present invention as a whole, while increasing the sewage treatment efficiency, the number of reaction vessels is reduced to provide an advantage of reducing the size and cost of the apparatus.

Meanwhile, chemical oxygen demand (COD), ammonia nitrogen (NH ₃ -N), nitrogen nitrate (NO ₃ -N), total nitrogen (TN), and phosphate by the sewage treatment apparatus and method of the present invention. The water quality measurements of -P (PO ₄ -P) are shown in Table 1 below, which is an average of the values measured once a day for approximately 7 days in total.

Classification (unit mg / l) Measured value COD 16.5 NH ₃ -N 7.8 NO ₃ -N 5.0 T-N 12.8 PO ₄ -P 0.1

Therefore, as can be seen in Table 1, it can be seen that the sewage treatment efficiency is effective through the sewage treatment apparatus and method of the present invention, for example, the chemical oxygen demand COD is significantly lower than the emission standard 50mg / l, nitric acid The nitrogenous NO ₃ -N is also considerably lower than the emission standard of 10 mg / l.

According to the sewage treatment apparatus of the present invention as described above, while treating the sewage through a biological reaction, aeration and anoxic reaction steps are performed in one tank, thereby reducing the size of the facility and economical in terms of cost, and easy operation of the facility and sewage treatment. The benefits of increased efficiency are also provided.

In addition, there is another effect of improving sewage treatment efficiency in the aerobic reaction environment by utilizing adhesive and suspended microorganisms, and by discharge through the filter unit to further improve the water quality of the treated water.

Finally, according to the sewage treatment method of the present invention, the sludge in the sedimentation zone is forcibly diffused and circulated in the aeration-aerobic tank, and the aerobic reaction environment and the anoxic reaction environment of the sludge in the sedimentation zone are repeatedly made. As a result, the removal of nitrogen through nitrification and denitrification and phosphorus release through anaerobic storage tanks and aeration-aerobic tanks are effectively carried out. It is to provide a good effect to be maintained.

While the invention has been shown and described in connection with specific embodiments so far, it will be appreciated that the invention can be varied and modified without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

Claims (14)

Anaerobic storage tanks in which sewage is introduced; At least one and installed in connection with the anaerobic storage tank, and provided with an acid nozzle for enabling circulation and surface ejection of the treated water therein, and at least one concentrated aeration engine, and in the treatment water inlet area An aeration-anoxic tank in which an aerobic-aerobic reaction of the sludge is carried out, including sludge diffusion means for intermittently diffusing the sludge in the sedimentation zone that has been released; And, A settling tank disposed in association with the aeration-free oxygen tank to allow settling and discharge of the treated water; Sewage treatment unit consisting of. According to claim 1, wherein the concentrated explosion pipe, the upper and lower blowout and inlet holes for the inflow and surface ejection of the treated water, the diffuser nozzle is the upper portion of the inlet hole in the lower side of the concentrated width pipe Sewage treatment apparatus, characterized in that arranged in connection with the air supply pipe. The method of claim 1, wherein the intermittent sludge diffusion means, An air pipe that is concentrated in the sludge settling zone which is separated from the adjacent treatment water inflow zone of the concentrated bomber; And An air spray nozzle provided in the air pipe to forcibly diffuse the settling sludge during the air spray to enable circulation through the concentrated expansive pipe; Sewage treatment device, characterized in that consisting of. 4. The sewage treatment apparatus according to claim 3, wherein the blower connected to the air pipe of the sludge diffusion means is electrically connected to the control unit to enable periodic intermittent supply of air. The sewage treatment apparatus according to claim 1, wherein the aeration-aerobic tank is further provided with a microbial contact medium which enables the attachment of the microorganisms in the treated water to increase the treatment efficiency. The method of claim 5, wherein the microbial contact medium is composed of a synthetic mesh of fine resin microsaft to facilitate the attachment of adherent microorganisms provided between the upper and lower support pipes, characterized in that disposed at least one in the tank Sewage treatment unit. The sewage treatment apparatus according to claim 1, wherein the sedimentation tank is divided into a sedimentation zone and a discharge zone through partition walls provided therein. 8. The sewage treatment apparatus according to claim 7, wherein the settling zone of the settling tank is provided with a rectifying wall for smoothing sludge settling of the treated water. 8. The sewage treatment apparatus according to claim 7, wherein a reciprocating sludge conveying unit is provided between the rectifying wall and the partition wall in the sedimentation zone of the sedimentation tank for disposing of the sludge and conveying the sludge to the anaerobic storage tank or the aeration-anoxic tank. . The method of claim 9, wherein the sludge conveying unit, A unit body moving back and forth along the rail at the bottom of the sedimentation tank; An operation wire connected to the unit body and installed in an endless track shape on the settling tank; And, A hose connected to the unit body, and an anaerobic storage tank or aeration-aerobic tank return pipe and waste pipe connected thereto; Sewage treatment apparatus comprising a reciprocating type including a. 8. The sewage treatment apparatus according to claim 7, wherein the discharge zone of the settling tank is provided with a filter unit for improving the water quality of the discharged water. The method of claim 11, wherein the filter unit, A unit body provided with a pipe connector for discharge of treated water; And, A melbrane filter member disposed on the unit body to improve water quality when passing through the treated water; Sewage treatment apparatus comprising a membrane filter including a. Phosphorus is released from the sludge in an anaerobic storage tank into which sewage is introduced, and the released phosphorus is excessively ingested by the activated microorganisms in the aeration-aerobic tank, and phosphorus is removed through removal of excess sludge; And, The sludge is intermittently diffused through the sludge diffusion means in the aeration-aerobic tank disposed in association with the anaerobic storage tank, and the diffused sludge is circulated through the concentrated bomber with treated water to provide an aerobic environment for nitrification, and the diffusion of the sludge is When stopped, the nitrogen-free environment in which the denitrification is made in the sludge of the settling region is repeatedly provided to remove nitrogen; Sewage treatment method configured, including. 15. The sludge system of claim 13, wherein the concentrated wide-area engine continuously performs circulation and surface ejection of the treated water including sludge, and the sludge diffusion through the sludge diffusion means is performed at intervals of 30-90 for 5 minutes. Sewage treatment method characterized in that the diffusion of the intermittent and the aerobic and anoxic environment is made intermittently repeated.

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