KR100330923B1 - anaerobic and aerobic contact circulation method, adhesive filtering method used waste water treatment system and its method - Google Patents

Abstract

The present invention relates to a water treatment system and a method for treating sewage sewage and domestic sewage together, and as an embodiment, a method for treating sewage such as manure sewage and domestic sewage. Or a sedimentation step of collecting sediment into a sedimentation tank for settling; (b) an anaerobic treatment step of sequentially supplying the first treated water flowing from the sedimentation separation tank to each of the circulating water tank 1 and the circulating water tank 2 including anaerobic mediators to remove nitrogen by anaerobic microorganisms; (c) an aerobic treatment step in which the treated water treated in step (b) is sequentially overflowed into one contact aeration tank and two contact aeration tanks each containing an aeration filter and simultaneously abandoned into each contact aeration tank to decompose organic matter by activation of aerobic microorganisms. Wow; (d) a precipitation step of introducing the treated water treated in step (c) into the settling tank to settle the organic matter in the third treated water; (e) It is characterized in that it comprises an attachment filtration treatment step of removing the residual contaminants by activating the aerobic microorganisms by supplying the treated water flowing in the sedimentation tank to the attachment filtration tank including the contact material to the oxygen supply.

Description

Anaerobic and aerobic contact circulation method, adhesive filtering method used waste water treatment system and its method}

The present invention relates to a water treatment system and a method for treating manure sewage and domestic sewage together, and in particular, after wastewater is circulated and treated in an anaerobic / aerobic state through a circulating water tank and a contact aeration tank, and after the final treatment through an attached filtration tank. In the wastewater treatment system and the method using anaerobic, aerobic contact circulation and attachment filtration which discharged and discharged sediment that impedes treatment efficiency effectively, supplied with activated microorganisms, and maximized treatment efficiency by removing residual pollutants It is about.

The pollution of rivers caused by sewage (manure, kitchen sewage, other living sewage, etc.) that is thrown away from homes today is becoming more serious, and environmental problems are increasing globally. And a treatment method are required.

Therefore, in order to solve this problem, the applicant filed Korean application No. 93-2216 (name of invention: sewage purification facility by anaerobic and aerobic contact circulation method and its treatment method) as of February 17, 1993.

It is a sedimentation separation tank (10) for sedimenting and separating solids and contaminants contained in the influent sewage, the first and second filled with anaerobic media (27) (37) to remove the nitrogen component in the sewage and to remove the organic matter The first and second contact aeration tanks filled with anaerobic filtration tanks 20 and 30 and contact materials 44 and 54 including an aerobic microbial layer to separate and remove organic matter, and aeration devices 45 and 55 are installed. A sedimentation tank (60) having an air lift pump (64) and a metering device (90) for circulating the sedimented circulating water and constituting the sewage from the (40) (50) to the center towel (63), and finally sewage The disinfection tank 70 for disinfecting and the discharge tank 80 for discharging the final treated water are connected to each other from the effluent inflow side to the discharge side of the treated water.

However, the above-mentioned technology has i) anaerobic media (27) and (37) do not have the facilities and processes to periodically discharge the backwash water after backwashing, so the contact area between the wastewater and the media will be reduced when used for a long time due to the filter closure phenomenon. Degradation, long-term deposition of inflow solids, causing a decrease in crude treatment capacity and odor, etc. ii) Sludge (precipitate) is just anaerobic filtration tank because it supplies circulating water from the settling tank 60 to the anaerobic filter tank 20. ), Worsening the anaerobic condition, and (i) there is a problem that the remaining pollutants are leaked in the process of direct discharge through the sedimentation tank (60), it was required to improve the security.

The present invention is to solve the problems of the prior art as described above, the waste water is circulated in the anaerobic, aerobic state through the circulating water tank and the contact aeration tank and treated after sediment that is impeded to the treatment efficiency by discharged after the final treatment through the attachment filtration tank The present invention aims to provide a wastewater treatment system and method using anaerobic, aerobic contact circulation and attachment filtration, which effectively discharges the wastewater, is supplied with an activated microorganism, and maximizes treatment efficiency by removing residual pollutants.

Specific means of the present invention for achieving the above object,

As a method for treating sewage, such as manure and sewage,

(a) sedimentation step of the sedimentation process by introducing the solids or contaminants contained in the sewage into the sedimentation tank;

(b) an anaerobic treatment step of sequentially supplying the first treated water flowing from the sedimentation separation tank to each of the circulating water tank 1 and the circulating water tank 2 including the anaerobic mediator to remove nitrogen by anaerobic microorganisms;

(c) an aerobic treatment step in which the treated water treated in step (b) is sequentially overflowed into one contact aeration tank and two contact aeration tanks each containing an aeration filter and simultaneously abandoned into each contact aeration tank to decompose organic matter by activation of aerobic microorganisms. Wow;

(d) a precipitation step of introducing the treated water treated in step (c) into the settling tank to settle the organic matter in the third treated water;

(e) It is characterized in that it comprises an attachment filtration treatment step of removing the residual contaminants by activating the aerobic microorganisms by supplying the treated water flowing in the sedimentation tank to the attachment filtration tank including the contact material to the oxygen supply.

Further, according to the present invention, as a system for treating sewage, such as manure sewage and domestic sewage,

A precipitation separation tank 20;

In order to decompose the treated water overflowed from the sedimentation separation tank 20 into anaerobic microorganisms, each of the circulating water tanks 1 and 2 chambers 30 and 40 having anaerobic media materials 31 and 41, respectively, The seals 30 and 40 include backwashing pipes 32 and 42 for the removal of deposits that are excessively attached to the anaerobic media 31 and 41;

Aerobic media (51, 61) for decomposing the treated water flowed from the circulation tank 2 chamber 40 into aerobic microorganisms, and back washing pipe (52) for dropping the adhered excess attached to the aerobic media (51, 61) And 62) and one or two contact aeration tanks (50, 60) disposed adjacent to each other, including the diffusers (53, 63), and a portion of the treated water in the two contact aeration tanks (60) is a circulation pipe (65). Recycle to the circulation tank 1 chamber (30) through;

A settling tank 70 which receives the treated water flowed from the contact aeration chamber 60 and settles the sludge, and simultaneously transports and discharges the sludge to the sedimentation separation tank through the surplus sludge feed pipe 74 through the air lift means 72. )Wow;

Including the attachment filtration tank 80 for further processing the residual oil contaminants contained in the treated water flowing from the sedimentation tank 70 with the adhesion medium 82, to the backwashing tube 81 disposed in the attachment filtration tank 80 A backwash water transfer pump 88 for dropping off deposits in the adhesion medium 82 and simultaneously transporting the sludges removed to the sedimentation separation tank 20 through the backwash water conveying pipe 89;

It characterized in that it comprises a blower 200 for performing aeration and backwashing and airlift necessary for each of the tanks (30, 40, 50, 60, 70, 80).

1 is a conceptual diagram of a wastewater treatment system according to an embodiment of the present invention.

2 is a layout view of a wastewater treatment system according to an embodiment of the present invention.

3 is a flow chart of a wastewater treatment process according to an embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

20: sedimentation tank 31,41: anaerobic media

32,42: Customs pipe 30,40: Circulating water tank 1,2

50,60: Aeration tank 1,2 Room 51,61: Exhaust media

52,62: Customs Customs 53,63: Industrial Institutions

70: sedimentation tank 80: attachment filtration tank

82: attachment media 84: abandonment control room

90: discharge tank 200: blower

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

1 is a conceptual diagram of a wastewater treatment apparatus according to an embodiment of the present invention, FIG. 2 is a layout view of a wastewater treatment system according to an embodiment of the present invention, and FIG. 3 is a flowchart of a wastewater treatment process according to an embodiment of the present invention. .

First, the present invention has a sedimentation separation tank 20 for collecting sewage to precipitate solids or contaminants.

One side of the sedimentation separation tank 20, the circulating water tank 1, 2 chambers (30, 40) each having an anaerobic medium (31, 41) to decompose the treated water flowing from the sedimentation separation tank 20 into anaerobic microorganisms This is arranged. The circulation tanks 1 and 2 chambers 30 and 40 include backwashing pipes 32 and 42 for dropping of deposits attached to the anaerobic media 31 and 41, and the backwashing pipes 32 and 42 are blowers, respectively. (blower: blower) 200 is connected to the air line 210.

The circulation tanks 1, 2 chambers (30, 40) are in communication with each other through the upstream pipe (35), the overflow pipe 35 is the overflow tank of the circulation tank 1 room (30) two circulation tanks (40) To guide.

The backwashing pipes 32 and 42 generate bubbles in the water when the blower 200 is driven, and the bubbles remove the deposits that inhibit the activity of the anaerobic microorganisms while indirectly or directly contacting the anaerobic media (31,41). Function. At this time, the customs pipes (32, 42) is used about once or twice a year.

On the side of the two circulation water tanks 40, one or two contact aeration tanks 50 and 60 are disposed adjacent to each other.

The contact aeration tanks 1 and 2 chambers 50 and 60 are aerobic media (51, 61) and the aerobic media (51, 61) for decomposing the treated water flowed from the circulation tank 2 chamber 40 into aerobic microorganisms; It includes a backwashing pipe (52, 62) and diffuser (53, 63) for the removal of the attachment attached to the.

In addition, an air lift pump 68 is installed in the contact aeration tank 2 chamber 60 to recycle a part of the treated water to the circulation tank 1 chamber 30 through the circulation pipe 65.

Therefore, when the air lift pump 68 is operated, the treated water in the two contact aeration tanks 60 continues to circulate through the circulation pipe 65 into the one circulation chamber 30, thereby reducing the impact load of the contaminants, thereby reducing the stability of the treatment process. Can improve the processing efficiency.

At this time, the air is blown about once or twice a year through the back washing pipes (52, 62) to remove the adherends attached to the contact materials (51, 61), and the diffuser (53, 63) for 24 hours. Blow in the air.

A settling tank 70 is disposed at one side of the two contact aeration tanks 60.

The sedimentation tank 70 receives the treated water flowed from the contact aeration 2 chamber 60 to settle the sludge, and at the same time, the sedimentation sludge is separated by the surplus sludge conveying line 74 into the air lift means 72. By discharging to the tank 20 to increase the settling efficiency.

On one side of the settling tank 70, an attachment filtration tank 80 having an aeration control chamber 84 is installed, and an aeration pipe 83 connected to the air line 210 is installed in the aeration adjustment chamber 84.

The attachment filtration tank 80 further processes the remaining contaminants contained in the treated water flowing out of the settling tank 70 through the adhesion media 82.

The adhesion medium 82 has a large specific surface area and should not easily drop off the microorganism, and has a structure that is not blocked by the excessive adhesion or contaminants of the microorganism, and in this embodiment, the material is polyvinylidene chloride (Polyvinylidene). chloride), the type of hang bio-contactor type was used.

At this time, the abandonment adjusting room 84 is preferably installed to increase the contact efficiency of the attachment medium during the water treatment.

In addition, in the attachment filtration tank 80, a backwashing tube 81 connected to the blower 200 is installed, and the deposit in the attachment medium 82 is dropped by bubbles generated through the backwashing tube 81. . In addition, the attachment filtration tank (80) is provided with a backwash water feed pump (88) for discharging the sludge precipitated after backwashing out of the attachment filtration tank (80) through the backwash water conveying pipe (89).

On one side of the attachment filtration tank 80, a discharge tank 90 for discharging the treated water that has been processed by the attachment filtration tank 80 is disposed.

V1, V2, V4, V6, V10 and V11 are backwash valves connected to the air line 210 on the blower 200 side, V3, V5 and V9 are aeration valves connected to the air line 210, and V7 and V8 are It is an air lift valve connected to the air line 210.

The operation of the present wastewater treatment system configured as described above will be described for each process.

<Precipitation Separation and Backwashing Mixing>

First, sewage, including solids or contaminants, is introduced into the sedimentation separation tank 20, and the solids or contaminants settle to the bottom of the sedimentation separation tank 20.

That is, the sediment and the treated water is separated through the sedimentation separation tank 20.

At this time, the sedimentation tank (20) from the sedimentation tank (70) and the attachment filtration tank (80) by the air lift 72 and the backwash water transfer pump (88), respectively, surplus sludge and backwash water from the surplus sludge transport pipe (74) and backwash water It is periodically supplied through the transfer pipe (89).

Anaerobic and backwashing

The treated water passed through the sedimentation separation tank 20 is sequentially passed to the circulation water tank 1 chamber 30 and the circulation water tank 2 chamber 40 including anaerobic mediators 31 and 41, respectively, and nitrogen is added by the anaerobic microorganisms. Removed.

In this process, the deposit attached excessively to the anaerobic media (31, 41) is backwashed after opening the backwash valves (V1, V2) once or twice a year for 5 to 10 minutes each time, and through this process, the anaerobic media ( 31, 41) to smooth the contact again to prevent a decrease in processing efficiency.

At this time, the circulating water 1 chamber 30 is returned from the contact aeration tank 2 chamber 60 and the circulating water containing no precipitate is increased, thereby increasing the treatment efficiency.

<Aerobic and backwashing>

The anaerobic secondary treated water flows into the contact aeration tank 1 chamber 50 and the contact aeration tank 2 chamber 60, and in the contact aeration tanks 1 and 2 chambers 50 and 60 through the diffusers 53 and 63. The air is blown to form an aerobic atmosphere and microorganisms are activated. Therefore, decomposition of organic matter by microorganisms is performed using the aerobic media 51 and 61 in the contact aeration tanks 1 and 2 chambers 50 and 60.

On the other hand, the backwashing pipes 52 and 62 open the backwashing valves V4 and V6 every 5 to 10 minutes each time about once or twice a year, and the backwashing air is blown by the blower 200, thereby exhaling the air filter medium (51). 61, the attachment attached to 61 is removed. Therefore, the processing load of the contact aeration tanks 1 and 2 chambers 50 and 60 is reduced, excessive growth of the aerobic media 51 and 61 is prevented, and clogging of the media is reduced.

<Sedimentation stage>

The exhaled treated water flows into the settling tank 70 from the two contact aeration tanks 60. In the sedimentation tank 70, the sediment is precipitated, and the precipitated sediment is transferred to the sedimentation separation tank 20 through the sludge conveying line 74 by the air lift 72.

This can prevent the sedimentation efficiency of the sedimentation tank 70 from being lowered by continuously circulating inside the treatment facility unlike the conventional art, and is directly transferred to the sedimentation separation tank 20 to improve the sedimentation efficiency.

At this time, the sedimentation tank 20 is externally returned to the sedimentation tank 20 using a cleaning vehicle about once a year.

<Attachment filtration process>

On the other hand, the treated water flowing from the settling tank 70 flows into the aeration control chamber 84 disposed on one side of the attachment filtration tank (80). In the aeration control room 84, sufficient oxygen (DO: dissolved oxygen) is supplied to the adhering water flowing into the attachment medium (82).

Secondary water passing through the aeration control chamber 84 flows into the attachment medium 82 to remove residual contaminants through contact with the filter medium.

In the attachment filtration tank 80, backwashing is performed every time for about 15 minutes once a day through the backwashing tube 81. Due to this backwashing, the substance attached to the attachment media 82 is dropped and the contact with the treated water is smoothed. The efficiency is raised.

The sediment dropped out is transferred to the sedimentation separation tank 20 along the backwash water transport pipe 89 by the backwash water transport pump 88.

At this time, the adhesion medium 82 contacts the microorganisms on the surface of the adhesion medium by adhering suspended solids (SS) in the treated water separated from the solid-liquid separation liquid in the settling tank 70 to highly process the remaining organic matter.

The final treated water treated in the attachment filtration tank 80 is discharged through the discharge tank 90.

As described above, according to the present invention, backwashing pipes are installed in the circulation water tanks 1 and 2, and the backwashing water and the sediment are periodically discharged to the sedimentation separation tank after the backwashing to prevent a decrease in the tank capacity.

According to the present invention, the sludge precipitated in the sedimentation tank is discharged to the sedimentation separation tank so that the anaerobic atmosphere of the circulating water tanks 1 and 2 can be exerted without deterioration, thereby improving treatment efficiency.

In addition, the present invention has the advantage of further processing the remaining organic matter from the settling tank by additional installation of the adhesion filtration tank.

Claims (7)

As a method for treating sewage, such as manure and sewage, (a) sedimentation step of the sedimentation process by introducing the solids or contaminants contained in the sewage into the sedimentation tank; (b) an anaerobic treatment step of sequentially supplying the first treated water flowing from the sedimentation separation tank to each of the circulating water tank 1 and the circulating water tank 2 including anaerobic mediators to remove nitrogen by anaerobic microorganisms; (c) an aerobic treatment step in which the treated water treated in step (b) is sequentially overflowed into one contact aeration tank and two contact aeration tanks each containing an aeration filter and simultaneously abandoned into each contact aeration tank to decompose organic matter by activation of aerobic microorganisms. Wow; (d) a precipitation step of introducing the treated water treated in step (c) into the settling tank to settle the organic matter in the third treated water; (e) Anaerobic, aerobic contact circulation method and deposition filtration method comprising the deposition filtration step of introducing the treated water flowing in the sedimentation tank into the attachment filtration tank including the contact material to further remove residual contaminants and then discharge. Wastewater method using The method of claim 1, An anaerobic, aerobic contact circulation and attachment filtration method comprising the pumping step of the attachment filtration tank for transferring the sludge precipitated in the attachment filtration tank in the step (e) into the sedimentation separation tank. The method of claim 1, Anaerobic, aerobic contact circulation method and attachment filtration method characterized in that the air is blown about once or twice a year to the circulating water tank 1,2 chamber and the contact aeration tank 1,2 chamber to eliminate the sludge attached to each medium. Wastewater method using The method of claim 1, The wastewater method using the anaerobic, aerobic contact circulation method and the attachment filtration method comprising a backwashing step to blow off the sludge attached to the contact material by blowing air into the attachment filtration tank once a day. The method of claim 1, In order to reduce the impact load of the contaminants in the two contact aeration tanks and to improve the stability of the treatment process, a part of the treated water is circulated to the one circulation water tank using anaerobic, aerobic contact circulation, and attachment filtration. Wastewater method. As a system for treating sewage such as manure sewage and domestic sewage, A precipitation separation tank 20; In order to decompose the treated water overflowed from the sedimentation separation tank 20 into anaerobic microorganisms, each of the circulation water tanks 1 and 2 chambers 30 and 40 having anaerobic media materials 31 and 41, respectively, The seals 30 and 40 include backwashing pipes 32 and 42 for the removal of sludge that is excessively attached to the anaerobic media 31 and 41; Aerobic media (51, 61) for decomposing the treated water flowing from the circulation tank 2 chamber 40 into aerobic microorganisms, and backwashing tube (52) for dropping the sludge excessively attached to the aerobic media (51, 61) And 62) and one or two contact aeration tanks (50, 60) disposed adjacent to each other, including the diffusers (53, 63), and a portion of the treated water in the two contact aeration tanks (60) is a circulation pipe (65). Recycle to the circulation tank 1 chamber (30) through; A settling tank 70 that receives the treated water flowed from the contact aeration chamber 60 and settles the sludge, and simultaneously transports and discharges the sludge to the settling separation tank through the surplus sludge transport pipe 74 to the air lift 72. Wow; Including the attachment filtration tank 80 for further processing the residual contaminants contained in the treated water flown from the sedimentation tank 70 with the adhesion medium 82, attached to the backwashing tube 81 installed in the attachment filtration tank 80 A backwash water transfer pump 88 for dropping the excess sludge in the filter medium 82 and simultaneously transporting the sludge dropped out to the sedimentation separation tank 20 through a backwashing pipe line 89; Wastewater treatment using anaerobic, aerobic contact circulation and attachment filtration, comprising a blower 200 for performing aeration and backwashing and airlifting required for each tank 30, 40, 50, 60, 70, 80 system. The method of claim 6, Using the anaerobic, aerobic contact circulation method and the attachment filtration method, the attachment filtration tank 80 is provided with an aeration control chamber 84 for supplying sufficient oxygen to the adhering water in order to improve the contact efficiency with respect to the adhesion medium 82. Wastewater Treatment System.