KR200202247Y1 - Apparatus for removing nutrients of sewage and industrial waste water - Google Patents

Abstract

The nitrogen and phosphorus simultaneous removal apparatus of the present sewage and sewage and wastewater are provided with carriers 22 and 32 in the oxygen-free filter 20 and the aerobic biooxidation filter 30, respectively. The denitrification is performed by the denitrification microbial membrane formed on the carrier 22 of the filter bed 20, and the release and excess of phosphorus by the aerobic bacteria in the anaerobic-aerobic state formed in the pores of the carrier 32 of the aerobic biooxidation filter 30 By removing phosphorus by ingestion and physical filtration, it is possible to construct an advanced treatment apparatus for improving water quality.

Description

Nitrogen and phosphorus removal device for sewage and sewage and wastewaters {APPARATUS FOR REMOVING NUTRIENTS OF SEWAGE AND INDUSTRIAL WASTE WATER}

The present invention relates to domestic sewage, sewage, and various industrial wastewater treatment devices, and in particular, the physical filtration and biofilm treatment are performed in one device so that the water purification and nitrogen of sewage and wastewater can be efficiently performed with a simple configuration. The present invention relates to a simultaneous removal device.

As population growth and industrial development, emissions of industrial wastewater, industrial wastewater, livestock wastewater and leachate, and various organic wastewater are increasing rapidly. Therefore, the amount of nitrogen and phosphorus flowing into the water increases day by day, and even though the increased nitrogen and phosphorus are essential nutrients of living organisms, if they are excessively discharged in the natural world without proper treatment, eutrophication is caused and the water quality of algae is increased. Increase pollution. The water that has undergone eutrophication is not suitable for water supply because of the blockage of the filter paper and the taste of the constant water as well as the bad smell, which is not suitable as a source of water as well as the rapid proliferation of algae, which consumes dissolved oxygen in the water. It causes the mass death of living things.

Therefore, sewage, sewage, and waste water must be purified and introduced into rivers and water sources, and treatment methods and devices are developed to prevent eutrophication by simultaneously treating nitrogen and phosphorus when purifying sewage, sewage, and wastewater. Reached.

Figure 1 shows a form of a typical representative sewage treatment process that can simultaneously process nitrogen and phosphorus, as shown, the primary settling tank (1), bioreactor (2), secondary settling tank (3) and The tertiary filtration unit 4 is provided in sequence, and the bioreactor 2 is generally composed of an anaerobic tank 2a, an anaerobic tank 2b, and an aerobic tank 2c.

When the effluent water from which the suspended solids are removed in the primary settling tank 1 is introduced into the anaerobic tank 2a in the treatment apparatus as described above, organic matter is ingested and decomposed by the microorganisms, and at the same time, the release of phosphorus is released. In addition to the growth of microorganisms, phosphorus is removed by overingesting polyphosphoric acid in the microorganisms. In other words, microorganisms involved in the removal of phosphorus have the ability to remove simple enzyme substrates in the anaerobic state, releasing phosphorus while assimilating it as a storage product in the cell, and in the aerobic state, phosphorus is ingested and stored in the form of multiple phosphates. Is removed.

Nitrogen removal is carried out by nitrification of nitrogen compounds in sewage and effluents by nitrifying microorganisms such as nitrosofying bacteria and nitrify bacteria in the aerobic state in the aerobic tank (2c) and then back to anoxic tank (2b). This is achieved by being denitrified by a denitrification microorganism such as Achromobacter or Pseudomonas in the anaerobic state after being returned to a certain amount.

As described above, the nitrogen and phosphorus-free microbial mixture is separated into solids by sedimentation treatment in the secondary sedimentation tank 3 so that the microorganism and the treated water are separated. Finally, it is treated in (4) and managed to discharge below the discharge standard.

However, the conventional wastewater advanced wastewater treatment method has a problem of having a complicated facility to maintain the water quality of the effluent discharged to the river below the reference value.

The main object of the present invention devised in view of the above problems is to simultaneously perform the biological treatment for the removal of nitrogen and phosphorus in the effluent and the physical filtration for the improvement of water quality in a single device, simplifying the advanced treatment process and equipment The present invention provides a device for simultaneously removing nitrogen and phosphorus from sewage, sewage, and wastewater to reduce facility installation costs due to the reduction of facilities and to increase space utilization efficiency due to the reduction of installation space.

It is another object of the present invention to provide sewage and sewage, which is suitable as a natural purification treatment method for purifying water by allowing a sufficient amount of microorganisms to maintain aerobicity while the effluent flowing through the carrier flows downward from the top of the carrier. It is to provide nitrogen and phosphorus simultaneous removal device of waste water.

1 is a layout view schematically showing a conventional sewage treatment apparatus.

Figure 2 is a schematic view showing the configuration of the nitrogen, phosphorous simultaneous removal apparatus of the present invention sewage and waste water.

Figure 3 is a cross-sectional view showing a carrier according to the present invention.

4 is a cross-sectional view for explaining the operation of the present invention.

Explanation of symbols on the main parts of the drawings

10: first settler 20: oxygen-free filter

30: aerobic biooxidation filter 40: treatment tank

22,32 carrier

In order to achieve the object of the present invention as described above, in the first sedimentation, anoxic filter, aerobic biooxidation filter, sewage and wastewater treatment apparatus using a treatment tank, the physical effluent of the effluent inside the aerobic biooxidation filter and anoxic filter A nitrogen and phosphorus simultaneous removal apparatus for sewage, wastewater and wastewater is provided, which is provided with a carrier for biofilm treatment together with phosphorus filtration.

Hereinafter, with reference to the embodiment of the accompanying drawings, nitrogen and phosphorus simultaneous removal apparatus of the present invention sewage and waste water, as described above in more detail as follows.

Figure 2 is a block diagram showing the structure of the present invention sewage and sewage, wastewater nitrogen, phosphorus simultaneous removal device, Figure 3 is a cross-sectional view showing a carrier according to the present invention, Figure 4 is a cross-sectional view for explaining the operation of the present invention As shown, the initial settler 10, the oxygen-free filter 20, the aerobic biooxidation filter 30, the treatment tank 40 are sequentially arranged, these are transfer pipes (11) (21) (31) Inlet pipe 12 is provided on the inlet side of the initial settler 10, and discharge pipe 42 is provided on the outlet side of the treatment tank (40).

The lower portion of the treatment tank (40) is provided with an effluent circulating means (50) for circulating a certain amount of effluent into an anoxic filter (20), and a back washing means for backwashing the aerobic biooxidation filter paper ( 60), aerobic maintenance means 80 for supplying air to the backwash water discharge means 70 and the aerobic biooxidation filter 30 for discharging the backwash water is provided.

The inside of the oxygen-free filter 20 is filled with a porous medium with a carrier 22 to inhabit denitrifying bacteria, and inside the aerobic biooxidation filter 30 to form an aerobic microbial membrane with physical filtration. As shown in FIG. 3, the carrier 32 formed by stacking the porous medium layer 32a, the royal sand layer 32b, and the gravel layer 32c is filled, and the lower collecting device 23 is disposed below the carriers 22 and 32, respectively. 33 is provided.

The circulation means 50 is a circulation line 51 connecting the lower end of the treatment tank (40) and the outlet pipe (11) of the initial settler (10), and a circulation pump (52) installed on the circulation line (51). And valves 53 and 54 provided at the front and rear of the circulation pump 52.

The backwashing means (60) is a compressor (62), an air storage tank (63), a flow indicator (64), which is installed on an air pipe (61) connected to one side of the lower end of the aerobic biooxidation filter (30), and automatic. A backwash pump 67, a valve 68: 68 ', installed on the valve 65, the washing water supply line 66 connected to the circulation line 51 and the lower side of the aerobic biofiltration paper 30; 68 ', 68' ').

The backwash water discharging means 70 is connected to the backwash water discharge line 73 and the backwash water tank 72 installed outside and the trap is disposed on the upper inside of the aerobic biooxidation filter (30) In addition, the backwash tank 72 is connected to the inlet pipe 12 of the initial settler 10 by a pumping pipe 74, and the pumping pipe 74 is provided on the pumping pipe 74, respectively Valves 76, 77, 78 are provided in the connecting pipe.

The aerobic maintenance means 80 is an aerobic maintenance pipe 81 for connecting one side of the air pipe 61 and the aerobic biooxidation filter 30, the valve 83 and the flow rate indicator for adjusting the air supply amount 84 It consists of.

In addition, the opening degree of the air supply amount control valve 83 is adjusted by the dissolved oxygen detector / regulator 82 provided on the upper portion of the treatment tank 40.

It describes the treatment process by the nitrogen, phosphorous simultaneous removal device of the sewage and wastewater, wastewater of the present invention is configured as described above.

When sewage and sewage and waste water enter the initial settler 10 through the inlet pipe 12, the solid matter is precipitated and removed from the inner bottom of the initial settler 10, and the effluent is discharged through an outflow pipe 11 to obtain an anaerobic filter ( 20) flows into the interior.

In the oxygen-free filter 20, the circulated water circulated in the treatment tank 40 along with the effluent from the initial settler 10 passes through the carrier 22 and is physically filtered and attached to the carrier 22 to form a biofilm. The denitrification of the nitrified nitrates in the aerobic biooxidation filter (30) by the denitrifying bacteria forming the nitrogen gas is released into the atmosphere to remove the nitrogen in the sewage or waste water.

When the denitrified effluent from the anaerobic filter 20 flows into the aerobic biooxidation filter paper 30 through the transfer pipe 21, the effluent flows downward as shown by the arrow on the upper side of FIG. While passing through the porous medium layer 32a, the sand layer 32b, and the gravel layer 32c, which are the carrier 32, physical filtration is performed and at the same time, adsorption oxidation of organic substances and growth of microorganisms are performed by the microorganisms.

In addition, the nitrogenous material contained in the sewage in the form of ammonia nitrogen is oxidized to nitrite nitrogen or nitrate nitrogen, which is oxidative nitrogen, by the nitrifying microorganisms, which are aerobic microorganisms, in the aerobic biooxidation filter (30). And flows into the treatment tank 40 through the circulation tank 51 and the circulation pump 52 in the treatment tank 40, and a certain amount is circulated to the anaerobic filter 20, in the anaerobic filter 20 Under anoxic conditions, the nitrate nitrogen is reduced by the denitrifying microorganisms and is released in the form of nitrogen gas, thereby removing nitrogen gas.

On the other hand, the removal of phosphorus in the anaerobic-aerobic state formed in the porous medium proceeds to release the phosphorus and excess intake, so that the discharged water discharged to the stream through the discharge pipe 42 is discharged in the state of nitrogen and phosphorus removed .

The circulating water circulated to the anaerobic filter 10 in the effluent flowing into the treatment tank 40 in the aerobic biooxidation filter 30 is to adjust the circulation rate according to the required denitrification degree, the circulation amount is 0.2 to 3 times compared to the influent It is desirable to adjust in between.

The aerobic biooxidation filter (30) is such that the air generated by the compressor 62 and the air storage tank 63 is introduced into the carrier 32 through the aerobic maintenance pipe (81), dissolved oxygen detection / The controller 82 is used to detect the concentration of dissolved oxygen in the effluent flowing into the treatment tank 40 to adjust the appropriate air injection rate.

On the other hand, if the pores of the filtration layer is clogged by the growth of microorganisms attached to the carrier 32 of the aerobic biooxidation filter (30) operating as described above to form a microbial membrane, the loss of the filtration head of the effluent is gradually increased. When the value reaches the design level, the backwash of the carrier 32 is performed.

When backwashing, first, close the valve 83 of the aerobic maintenance pipe 81 and open the valve 65 of the air piping 61 so that the air flows into the lower side of the aerobic biooxidation filter 30. Passed from the lower side to the upper side 32 and shakes the microorganisms attached to the carrier 32 so that the microorganisms fall from the carrier 32.

In such a state, when the valve 68 of the washing water supply line 66 and the valve 78 of the backwash water discharge pipe 73 are opened and the backwash pump 67 is operated, the inner lower portion of the aerobic biofiltration filter 30 is opened. The backwash water is supplied, and the supplied backwash water flows from the lower side of the carrier 32 to the upper side and flows upward with the separated microorganisms, and the level of the backwash water flowing upward is set at the installation height of the trap. When the backwash water is reached, the backwash water is discharged to the backwash tank 72 through the trap (71) and the backwash water discharge pipe (73), and the backwash water discharged to the backwash tank (72) is transferred to the conveying pump (75). Is pumped back to the inlet 12.

In the above embodiment, a porous medium is used as the carrier 22 filled in the anoxic filter 20, and a porous medium, royal sand, and gravel are stacked as the carrier 32 filled in the aerobic biofiltration paper 30. For example, but not necessarily limited thereto, denitrification bacteria may inhabit the inside of the anaerobic filter 20 by adding an anthracite layer, and form an aerobic biofilm inside the aerobic biooxidation filter paper 30. In addition, if the configuration capable of physical filtration can be applied to any number within the scope and spirit of the present invention.

As described in detail above, the device for simultaneously removing nitrogen and phosphorus of sewage, sewage, and wastewater is equipped with a carrier for biofilm treatment simultaneously with physical filtration in an anaerobic filter and aerobic biooxidation filter, and in sewage, sewage, and wastewater. By simultaneously removing nitrogen and phosphorus and physical filtration, the discharge water quality is kept below the statutory discharge water quality standard so that water quality such as red tide and green algae caused by adverse effects of water or abnormal growth of microorganisms, etc. It is effective in preventing environmental destruction.

In addition, the present invention has a simple structure compared to the conventional high processing apparatus, the manufacturing cost is reduced, the installation area is effective.

Claims (2)

In the sewage and wastewater treatment apparatus using an initial settler, an oxygen-free filter, an aerobic biooxidation filter, and a treatment tank, a carrier for physical filtration and biofilm treatment is provided inside the aerobic biooxidation filter and an oxygen-free filter, respectively. Simultaneous removal of nitrogen and phosphorus from sewage and wastewater. The apparatus of claim 1, wherein the carrier is any one of a porous media layer or a porous media layer, a royal sand layer, and a gravel layer, which are sequentially stacked.