KR100446554B1 - Simultaneous removal apparatus of organic matter, nitrogen and phosphorus in sewage water - Google Patents

Abstract

The present invention is a pre-treatment tank, nitrate-nitrogen reduction tank, anaerobic tank, dissolved oxygen reduction tank, semi-anaerobic tank, aerobic tank for filthy water containing pollutants such as organic matter, nitrogen and phosphorus discharged from sources such as homes and restaurants It is purified by microorganisms through the sedimentation tank to remove pollutants at the same time by oxidizing organic matter in filthy water, nitridation and nitrification and denitrification of nitrogen, elution of phosphorus and excessive intake. The present invention relates to a sewage treatment system for simultaneously removing organic matter, nitrogen and phosphorus in sewage.

The present invention is to provide a anaerobic tank (2) and dissolved oxygen reduction tank (3) without oxygen supply to the sewage through the pre-treatment tank (1) designed to remove floating materials such as oil in sewage and sedimentary substances such as sand at the same time In the anaerobic tank (2), the microorganism ingests the organic matter in the sewage and at the same time elutes phosphorus in the microorganism body, and after passing through the pretreatment tank (1) in the dissolved oxygen reduction tank (3) 4), the wastewater sent to the aerobic tank (7) where oxygen is supplied to the aeration tank (7) equipped with an aeration device (6) for supplying air through the semi-anaerobic tank is supplied to the aerobic microorganism and oxygen in the aerobic tank (7). The organic matter in the sewage is oxidized, the nitrogen is nitridized and nitrified, and the microorganisms which released phosphorus in the anaerobic tank 2 ingested the phosphorus in the sewage excessively, and passed the aerobic tank (7) and ingested the organic matter. beauty A portion of the water and sewage mixture is sent to the dissolved oxygen reducing tank through the inner return pipe (8), and the mixed liquid whose dissolved oxygen is reduced through a certain period of time in the dissolved oxygen reducing tank (3) is sent to the quasi-anaerobic tank (4). Nitrogen is removed while being denitrated by the denitrification microorganism, and the remaining mixed liquid other than the mixed liquid transferred through the inner conveying pipe 8 is sent to the settling tank 9 to be precipitated, and the purified supernatant of the upper is the supernatant discharge pipe 10. Part of the sludge discharged and precipitated is removed by the air suction device 11 using the air of the blower 5 to remove the organic matter and phosphorus in the sewage, the remaining precipitated sludge is the air suction device (11) is sent to the nitrate nitrogen reduction tank (13) through the conveying sludge transfer pipe (12) without a separate pump device to reduce the nitrate nitrogen and then sent to the anaerobic tank (2), It is configured to maintain the water concentration.

Description

Simultaneous Removal of Organics, Nitrogen and Phosphorus in Sewage {SIMULTANEOUS REMOVAL APPARATUS OF ORGANIC MATTER, NITROGEN AND PHOSPHORUS IN SEWAGE WATER}

The present invention is subjected to pre-treatment tank, nitrate nitrogen reduction tank, anaerobic tank, dissolved oxygen reduction tank, quasi-anaerobic tank, aerobic tank, sedimentation tank containing filthy water containing pollutants such as organic matter, nitrogen and phosphorus discharged from sources such as homes and restaurants It is purified by microorganisms and removes contaminants at the same time by oxidizing organic matter in sewage, nitridation and nitrification and denitrification of nitrogen, elution and excessive intake of phosphorus, so that contaminants in sewage can be efficiently treated. The present invention relates to a sewage treatment system for simultaneously removing organic matter, nitrogen, and phosphorus.

In general, organic matters in sewage and sewage have been regulated and regulated by limiting the allowable concentration, but nutrients such as nitrogen and phosphorus are rarely regulated, so nutrients in untreated sewage are discharged to the river as it is. It is under the situation of causing eutrophication of rivers and causing red tide of the ocean and threatening marine aquatic ecosystem. Recently, it is possible to remove not only organic matter but also nutrients such as nitrogen and phosphorus by strengthening the concentration standard of nitrogen and phosphorus emission. There is a growing interest and investment in water treatment systems.

In addition, the amount of waste sludge produced when the nutrients such as nitrogen and phosphorus are removed by the chemical treatment method is relatively higher than the biological treatment, which increases the cost of treating the waste sludge and increases the cost of purchasing pharmaceutical drugs. Recently, many attempts have been made to biologically remove nutrients such as nitrogen and phosphorus.

The present invention has been made in view of the necessity of simultaneous removal of organic matter, nitrogen, phosphorus in the field of sewage treatment as described above, the present invention is to contaminants such as organic matter, nitrogen and phosphorus discharged from sources such as homes and restaurants The sewage contained is purified by microorganisms through pretreatment tank, nitrate nitrogen reduction tank, anaerobic tank, dissolved oxygen reduction tank, quasi-anaerobic tank, aerobic tank, sedimentation tank to oxidize organic matter in sewage, nitridation and nitrification and denitrification of nitrogen, It is intended to provide a sewage treatment system for simultaneous removal of organic matter, nitrogen and phosphorus in sewage which can efficiently treat pollutants in sewage by simultaneously removing contaminants through elution and excessive intake of phosphorus. When described in detail based on the drawings as follows.

1 is a plan view of a configuration showing a system using a glass fiber reinforced plastic of an embodiment of the present invention

Figure 2 is a plan view of a configuration showing a system using the concrete structure of the embodiment of the present invention

<Description of Symbols on Main Parts of Drawing>

1: pretreatment tank

2: anaerobic tank

3: dissolved oxygen reduction tank

4: quasi-anaerobic tank

5: blower

6: aeration device

7: aerobic tank

8: internal return pipe

9: settling tank

10: upper water discharge pipe

11 air suction device

12: conveying sludge transport

13: nitrate nitrogen reduction tank

Glass fiber reinforced plastic (FRP) or concrete pretreatment tank (1), anaerobic tank (2), dissolved oxygen reduction tank (3), quasi-anaerobic tank (4), aerobic tank (7), sedimentation tank (9) and nitrate nitrogen reduction tank And reaction tanks (13).

In addition, there is a transfer pipe connected between the reaction tank for the passage of the sewage and microorganisms and the organic liquid mixture, a blower (5) and aeration device (6) for supplying oxygen to the aeration tank (7), discharge of sludge and It consists of the air suction apparatus 11 etc. for conveyance.

Hereinafter will be described the working state of the present invention configured as described above.

The sewage from which the material is removed is transferred to the anaerobic tank 2 and the dissolved oxygen reduction tank 3 through a pretreatment tank 1 designed to simultaneously remove substances such as oil and sand in the sewage.

The anaerobic tank (2) is in a state where there is no oxygen supply, and the action of releasing phosphorus in the body of the microorganism takes place in the process of ingesting organic matter in the sewage introduced into the anaerobic tank (2) in the anaerobic tank (2), anaerobic tank (2) The mixed solution of sewage and microorganisms in the anaerobic tank (2) is transferred to the dissolved oxygen reduction tank (3).

In the dissolved oxygen reduction tank (3), the mixed solution of microorganisms in the anaerobic tank (2) and the microorganisms in the anaerobic tank (2) and the pre-treatment tank (1) are separated into the anaerobic tank (2) and the influent sewage and aerobic tank (7). The mixed solution of microorganisms and sewage in the nitrified aerobic tank (7) transferred through the inner conveying pipe (8) is mixed so that the denitrification in the semi-anaerobic tank (4) can be performed well before entering the semi-anaerobic tank (4). The action of sufficiently reducing the dissolved oxygen occurs, and in the semi-anaerobic tank 4, the nitrogen component nitrified in the aerobic tank 7 by the denitrification microorganism under low oxygen concentration is removed by nitrogen gas through the denitrification.

In the semi-anaerobic tank (4), the denitrification and the mixed solution of the microorganisms are transferred to the aerobic tank (7), and in the aerobic tank (7), the aerobic microorganisms are sewage by using oxygen supplied by the blower (5) and the aeration device (6). After oxidizing the organic matter in the inside and over-ingestion of phosphorus in the body released from the anaerobic tank 2, sedimentary sludge is formed. Nitrogen in the sewage that is not removed is nitridation and nitrification by microorganisms. Nitrate nitrogen through the, the nitrate nitrogen component is removed in the form of nitrogen gas through the denitrification through the dissolved oxygen reduction tank (3) and the quasi-anaerobic tank (4) as described above through the inner conveying pipe (8).

The remaining mixed liquid except the internally returned filthy water and microbial mixed liquid is transferred to the settling tank 9 and settled, and the purified supernatant of the upper part is discharged through the supernatant discharge pipe 10, and some of the precipitated sludge is discharged from the aerobic tank 7 The air suction device 11 using the air of the blower 5 used in the aeration device 6 is transferred to the nitric acid nitrogen reduction tank 13 through the conveying sludge transport pipe 12, and in the nitric acid nitrogen reduction tank 13, the anaerobic tank The concentration of nitrate nitrogen in the returned sludge before the transfer to (2) is sufficiently reduced so as not to inhibit phosphorus elution by the microorganisms in the anaerobic tank (2), and then transferred to the anaerobic tank (2) to maintain the required microbial concentration in the system. The remaining sludge in the sludge precipitated in the settling tank (9) is to be removed through the air suction device (11) to remove the organic matter and phosphorus in the sewage.

As described above, the present invention passes the filthy water containing contaminants such as organic matter, nitrogen, and phosphorus through a pretreatment tank, a nitrate nitrogen reduction tank, an anaerobic tank, a dissolved oxygen reduction tank, a quasi-anaerobic tank, an aerobic tank, a precipitation tank, and the like by microorganisms. By purifying and removing pollutants such as organic matter, nitrogen and phosphorus in the sewage at the same time and discharged to the river, it is possible to prevent environmental pollution by the sewage containing the pollutants, and by nutrients such as nitrogen and phosphorus It can prevent the destruction of ecosystems by preventing the eutrophication of rivers and the red tide of the ocean.

Claims (1)

The sewage through the pretreatment tank (1) designed to simultaneously remove suspended solids such as oil in sewage and sedimentary substances such as sand is sent to the anaerobic tank (2) and dissolved oxygen reduction tank (3) without oxygen supply, and to the anaerobic tank. In (2), the microorganism ingests the organic matter in the sewage and at the same time elutes phosphorus in the microorganism body, and mixes with the sewage sent after passing through the pretreatment tank (1) in the dissolved oxygen reduction tank (3) to the quasi-anaerobic tank (4). Aeration device 6 for supplying air by the blower 5 through the quasi-anaerobic tank is provided, and the sewage sent to the aerobic tank 7 where oxygen is supplied is discharged by the aerobic microorganism and oxygen in the aerobic tank 7. Of the organic matter is oxidized, nitrogen is nitridation and nitrification, the microorganisms releasing phosphorus in the anaerobic tank (2) excessively ingested the phosphorus in the sewage, and after passing through the aerobic tank (7) and the microorganisms and sewage A part of the mixed solution is sent to the dissolved oxygen reducing tank through the inner return pipe (8), and the mixed solution in which the dissolved oxygen is reduced through a certain time stay in the dissolved oxygen reducing tank (3) is sent to the quasi-anaerobic tank (4) to denitrify microorganisms. Nitrogen is removed while being denitrified, the remaining mixed liquid other than the mixed liquid transferred through the inner conveying pipe (8) is sent to the settling tank (9) to be precipitated, the purified water of the upper is discharged through the supernatant discharge pipe (10) And part of the precipitated sludge is removed by the air suction device (11) using the air of the blower (5) to remove the organic matter and phosphorus in the sewage, the remaining precipitated sludge is the air suction device (11) It is sent to the nitrate nitrogen reduction tank 13 through the return sludge transfer pipe 12 without a separate pump device to reduce the nitrate nitrogen, and then sent to the anaerobic tank 2 to maintain the microbial concentration required for the process. Simultaneous removal of organics, nitrogen and phosphorus in sewage, designed to maintain sewage.