KR100233565B1 - High-quality sewage treatment system using microorganism control tank - Google Patents

Abstract

The present invention can remove organic substances in the domestic sewage and manure by the proliferation and decomposition of anaerobic and aerobic microorganisms, and remove nitrogen and phosphorus from nutrients using nitrification, denitrification, dephosphorization, and the like. A first anaerobic tank (2) for sedimenting and anaerobic digestion of contaminants, sedimentable solids and returned sludge mixed in the processed materials to provide a high efficiency living sewage treatment system using a microorganism control tank; A second anaerobic tank (3) for anaerobic digestion of the processed material passing through the first anaerobic tank (1) and denitrification and dephosphorization by anaerobic tank contact media; Part of the raw water flowing into the first anaerobic tank (2) is introduced into the microorganisms and microorganisms native to the microbial inoculation pumice (Bio-clod) eluted and activated microorganisms contact the aeration chamber (4) And microbial adjustment tank (7) for supplying; By continuously supplying air to the to-be-processed object via the anaerobic tanks (2, 3), the organic material is increased by the activity of the aerobic microorganisms attached to the flexible plate-like contact media having flexibility and the microorganisms supplied from the microorganism control tank (7). A contact aeration chamber 4 for promoting decomposition; The final settling chamber 5 connected through the opening of the bottom of the dividing wall of the contact aeration chamber 4, and the bottom of the final settling chamber 5 has an inclination and flows from the contact aeration chamber 4. Some of the final settling chamber 5 is internally conveyed by gravity, and is conveyed to the first anaerobic tank by a sludge conveying device 12 sludged to settle in the final settling chamber 5; And a filtration decomposition chamber (6) filled with a medium in which untreated organic material is precipitated and biologically decomposed in the processed material that has passed through the final precipitation chamber (5). do.

Description

High efficiency living sewage treatment system using microorganism control tank

The present invention relates to a high-efficiency household sewage treatment system using a microbial control tank for complex treatment of manure and household wastewater discharged from a general household, and more specifically, household wastewater (washing water, washing water, High efficiency combined treatment device designed to decompose organic matter by metabolism and oxidative action of aerobic microorganisms by combining manure discharged from flush toilet, and to remove nutrients which are the main culprit of eutrophication of lake water. will be.

As of the end of 1994, Korea's population is 4,508 million people, and about 1,463 million tons of daily sewage is discharged. 85.1% of the total is emitted from cities above the hourly rate, and 14.9% is emitted from below towns and non-urban areas. Domestic sewage generation accounts for 63.1% of total wastewater generation, of which only 45% of the total population is handled by 71 sewage treatment plants in 63 cities across the country (Ministry of Environment, "Environment White Paper", 1996). However, such a large sewage treatment plant has basically a long length of the collecting pipe, and the concentration of influent flowing into the sewage treatment plant is BOD 200 mg / L due to poor construction, damage, and poor maintenance of sewage pipe construction. In most cases, BOD is less than 100 mg / L, and the actual sewage dissemination rate is only 28%. In addition, Korea's farming and fishing villages account for 15.8% (711 million people) and sewage generation of 9.4% of the total population as of 1994, but the domestic sewage treatment facilities are insignificant. However, in rural areas, the improvement of living standards and the distribution of flushed toilets are being carried out, and in the near future, the amount of sewage will increase, and the pollution of rivers and water sources will be rapidly progressed. Therefore, proper treatment of living sewage and manure is required. It is true.

On the other hand, domestic sewage treatment in foreign countries is not a problem in the United States and Europe, because the anger and domestic wastewater discharged from the home are directly processed into sewage treatment plants through sewage conduits, but Korea, Japan, In Asian countries such as Taiwan, manure is treated as septic tanks.

Therefore, in order to fundamentally prevent water pollution, it is absolutely necessary to develop a technology for a high-efficiency household sewage treatment system that combines manure and daily mixed wastewater. The present inventors have developed a high-efficiency household sewage treatment system using a microorganism control tank capable of simultaneously removing organic substances and nutrients for the complete treatment of domestic sewage discharged from the home for this reason, thereby completing the present invention.

An object of the present invention is to remove organic substances in the domestic sewage and manure by the proliferation and decomposition of anaerobic and aerobic microorganisms and to remove nitrogen and phosphorus in nutrients using nitrification, denitrification, dephosphorization, etc. It is to provide a high efficiency living sewage treatment system using a microorganism control tank that can be.

1 is a plan view of a high efficiency living sewage treatment system using a microorganism control tank according to the present invention.

2 is a front view of the high efficiency living sewage treatment system using a microorganism control tank according to the present invention.

Figure 3 is a plan view of the flow rate control device installed in the inlet of the high efficiency living sewage treatment system using a microorganism control tank according to the present invention.

Figure 4 is a front view of the flow control device installed in the inlet of the high efficiency living sewage treatment system using a microorganism control tank according to the present invention.

5 is a sludge conveying apparatus using air installed in the filtration decomposition chamber of the present invention.

Figure 6 is a plan view of a high efficiency living sewage treatment system microbial control tank using a microorganism control tank according to the present invention.

7 is a front view of the high efficiency living sewage treatment system microbial control tank using a microorganism control tank according to the present invention.

8 is a crushed stone and mineral support of the high efficiency living sewage treatment system control tank using a microorganism control tank according to the present invention.

Figure 9 is a filter medium flow preventing plate of the filtration decomposition chamber of the high efficiency domestic wastewater treatment system using a microorganism control tank according to the present invention.

*** Explanation of symbols for main parts of drawing ***

1: High efficiency living sewage treatment system using microorganism control tank

2: First anaerobic tank 3: Contact type 2 anaerobic tank

4: contact aeration chamber 5: final sedimentation chamber

6: filtration decomposition chamber 7: microorganism control tank

8: inflow flow control device 9: transfer pipe

10: anaerobic contact medium 11: aeration chamber contact medium

12: sludge feed device 13: filtration cracking chamber inlet pipe

14: media flow prevention plate 15: sludge settling portion

16: sludge transport apparatus 17: microorganism control tank inlet pipe

18: coarse crushed stone and bio-clod support

19: coordinator

20 bio-cladding layer 21 crushed stone and mineral layer

22: fluid flow pipe 23: aeration tank inlet pipe

24 exhaust port 25 manhole

26: entrance 27: exit

The present invention relates to a first anaerobic tank (2) for sedimentation and anaerobic digestion of contaminants, sedimentable solids, and returned sludge mixed in a workpiece; A second anaerobic tank (3) for anaerobic digestion of the processed material passing through the first anaerobic tank (1) and denitrification and dephosphorization by anaerobic tank contact media; Part of the raw water flowing into the first anaerobic tank (2) is introduced into the microorganisms and microorganisms native to the microbial inoculation pumice (Bio-clod) eluted and activated microorganisms contact the aeration chamber (4) And microbial adjustment tank (7) for supplying; By continuously supplying air to the to-be-processed object via the anaerobic tanks (2, 3), the organic material is increased by the activity of the aerobic microorganisms attached to the flexible plate-like contact media having flexibility and the microorganisms supplied from the microorganism control tank (7). A contact aeration chamber 4 for promoting decomposition; The final settling chamber 5 connected through the opening of the bottom of the dividing wall of the contact aeration chamber 4, and the bottom of the final settling chamber 5 has an inclination and flows from the contact aeration chamber 4. Some of the final settling chamber 5 is internally conveyed by gravity, and is conveyed to the first anaerobic tank by a sludge conveying device 12 sludged to settle in the final settling chamber 5; And a filtration decomposition chamber (6) filled with media through which precipitation and biological decomposition of unprocessed organic substances in the processed materials passed through the final precipitation chamber (5) are performed.

Preferred embodiments of the invention may be further embodied by the content of the dependent claims in the claims.

Description of the Preferred Embodiments

According to the present invention, the treated material is first introduced into the first anaerobic tank to proceed with precipitation and anaerobic decomposition first, the nitrogen removal by denitrification is performed in the second anaerobic tank, and the microorganisms activated in the microorganism control tank are contact width. Combined with high efficiency living sewage treatment using microorganism control tank which is supplied to gas chamber to remove most organic substances, separation of microorganism and treated water in final sedimentation chamber, and final treatment in filtration cracking chamber to secure stable treatment efficiency. Provide the device.

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

1 is a plan view of the living sewage treatment system according to the present invention, Figure 2 shows a front view of the living sewage treatment apparatus according to the present invention.

As can be seen in Figures 1 and 2, the living sewage treatment system 1 of the present invention is the first anaerobic tank 2, the contact type 2 anaerobic tank 3, the contact aeration chamber 4, the final It consists of the precipitation chamber 5, the filtration decomposition chamber 6, and the microorganism control tank 7.

In the first anaerobic tank (2), sediments and sedimentary solids are precipitated and the anaerobic decomposition of organic substances by anaerobic microorganisms occurs. 12) and sludge deposited in the filtration cracking chamber sludge sedimentation unit 15 is transported using a sludge conveying device 16 having a shape as shown in FIG. Is done.

The inflow into the first anaerobic tank 2 to be treated is the total amount of the first anaerobic tank 2 when a small amount flows from the inlet 26 by the inflow flow regulator 8 having a shape as shown in FIGS. 3 and 4. Inflow to the, when the flow rate is large, it is configured so that some amount can be introduced into the microorganism control tank (7) through the microorganism control tank inlet pipe (17). 6 and 7 through a microorganism control tank inlet tube 17 of a certain amount of the processing material introduced into the microorganism control tank 7 is used as nutrients of the activated microorganism and the contact width through the aeration tank inlet tube 23 It is transferred to the air chamber 4.

In the microorganism control tank 7, various minerals essential for the growth of microorganisms are eluted by oxygen supply from the crushed stone, microorganism inoculation pumice, and the adjustment tank 20 installed at the bottom of the mineral layer 21. The native microorganisms of pumice stone facilitate the activation of the microbial community eluted while passing through the bio-clod layer 20, and the various microorganisms eluted from the bio-clod layer 20 are introduced into the treated material. It proliferates and activates using organic materials and is transferred to the contact aeration chamber 4 to remove a large amount of organic materials through active oxidation and proliferation, and to buffer microbial inhibitors (chlorine-based bleach and detergents, etc.) contained in raw water. It is possible to secure a stable processing efficiency by exerting enough. In addition, the fluid flow pipe 22 installed at the center of the microorganism adjusting tank 7 is installed to prevent sludge settling at the bottom of the adjusting tank 7 and to smooth the flow of the upper and lower portions.

The to-be-processed object which passed the 1st anaerobic tank 2 is conveyed to the contact-type 2nd anaerobic tank 3 filled with the floating media through the conveyance pipe 9. The treated material introduced into the contact-type second anaerobic tank 3 again undergoes anaerobic decomposition and denitrification by the denitrifying microorganisms attached to the anaerobic tank contact medium 10, and the first anaerobic tank 20 The volume ratio of the second anaerobic tank 3 in contact with was made from 1.5: 1 to 3: 1. The capacity ratio is preferably around 2: 1. The to-be-processed object via the said contact-type 2nd anaerobic tank 3 is conveyed to the contact aeration chamber 4. The structure of the preferred delivery pipe 9 is a semi-circular pipe positioned to be locked to a quarter position of the water to prevent the inflow of scum formed on the anaerobic tanks 2 and 3 and the inflow of precipitated sediment. The structure is good.

The workpieces introduced into the contact aeration chamber 4 remain aerobic due to the air sent from the blower and are contained in the workpieces by the aerobic microorganisms attached to the surface of the porous plate contact medium installed in the contact aeration chamber 4. Organic matter is decomposed and nitrification is effected by nitrifying microorganisms attached to the media. In addition, the activated microorganism continuously supplied from the microorganism control tank 7 removes a large amount of organic substances by vigorous proliferation activity and oxidation of organic matter in the contact aeration tank, and the microorganisms eluted from the microorganism control tank 7 form flocs. It is good to separate microorganisms from treated water in the final sedimentation tank. The air supplied to the contact aeration chamber 4 is made of fine bubbles by a diffuser installed in parallel with the contact aeration chamber and delivered. The supplied fine bubbles form a flow in the contact aeration chamber 4 by the oxygen transfer action and the synergism of the air bubbles to maintain a completely mixed state to provide an opportunity for contact between organic matter and microorganisms. In addition, by maintaining the residence time in the contact aeration chamber 4 to minimize the sludge production amount can be operated for about one year to dispose the sludge produced.

The preferred contact medium 11 has a plate-like structure that is easy to attach to microorganisms and does not affect the flow of the contact aeration chamber 4, and is preferably disposed at right angles to the diffuser. The plate media with a flexibility of 3 cm has a very good effect on microbial adhesion ability, permanence and economy.

The workpiece to be processed via the contact aeration chamber 4 is transferred to the final precipitation chamber 5 through an opening at the bottom of the final precipitation chamber separation wall. The lower part of the final precipitation chamber 5 was inclined more than 40 ° to facilitate the precipitation of solid matter and microorganisms and the return of the precipitated microorganisms to the aeration chamber 4. The contact media attached to the contact aeration chamber 4 is desorbed due to the growth of microorganisms over time and is transferred to the final precipitation chamber. The transported desorption microorganisms and precipitated sludge are transferred to the first anaerobic tank by the sludge transport apparatus 12.

The principle of the sludge conveying apparatus is that the sludge is vertically moved due to the synergism of the air supplied through the air inlet pipe (see FIG. 5).

The transfer device can easily control the amount of contaminant decomposition aerobic microorganisms in the contact aeration chamber, and is installed at the bottom of the final sedimentation chamber for efficient sludge return and anaerobic digestion in an anaerobic tank without cleaning in the aeration chamber (4) after sludge reduction. It has the advantage of cleaning. After the transfer to the first anaerobic tank (2) by the denitrification reaction of the denitrification microorganism attached to the contact medium by feeding the organic material of the workpiece to be transferred to the contact-type second anaerobic tank (3) flowing in an anoxic state Turned into nitrogen and released into the atmosphere. Therefore, the sludge conveying apparatus 12 effectively conveys the microorganisms detached from the contact media of the contact aeration chamber 4 to prevent water deterioration and contributes to the removal of nutrients by denitrification.

The to-be-processed object via the final sedimentation chamber 5 flows into the filtration decomposition chamber 6 through the filtration decomposition chamber 6, the inflow pipe 13. As shown in FIG. The filtration cracking chamber (6) is located over the first anaerobic tank (2) and the second anaerobic tank (3) and submerged to a certain depth on the treated water passing through the first anaerobic tank (2) and the second anaerobic tank (3). It remains floating. The treated material introduced into the filtration decomposition chamber 6 is precipitated and aerobic decomposed while passing through the filtration decomposition chamber 6 filled with the filter media. At this time, the untreated organic material is filtered through the residual dissolved oxygen in the aeration tank. It is decomposed and removed by a microorganism attached to the surface of the. When the flow of the filter medium due to the flow of the filtration decomposition chamber 6, it is difficult to attach microorganisms to the filter medium and there is a phenomenon that the filter medium is driven to one side. Installed in the same shape as.

In the filtration cracking chamber (6), a large amount of pin-floc is discharged without settling in the final settling chamber (5), so that sludge is deposited on the bottom of the filtration cracking chamber (6) to maintain an anaerobic condition. In order to install the sludge settling unit 15 in the first half and the second half of the filtration cracking chamber 6, the sludge deposited in the filtration cracking chamber is transferred to the first mold tank 2 using the sludge feeder 16. Solved. The filter medium flow preventing plate 14 was opened so that the sludge is smoothly moved to the sludge settling portion 15 as shown in FIG.

That is, the median flow preventing plate of FIG. 9 is installed at regular intervals in the filtration cracking chamber. As an example, the filtration cracking chamber 6 shown in FIG. 1 includes a first anaerobic tank 2 and a second anaerobic tank. The median flow prevention plate 14 of the partition type which has the U-shape, and has the cross section (3) is provided inside. Movement of the supernatant and sludge flowing through the filter medium flow preventing plate 14 is made of a different path, the supernatant flows through the A portion, and the sludge moves to the B portion. The sludge moving to the B portion is settled in the sludge settling portion 15 in the filtration decomposition chamber, and the precipitated sludge is returned to the first anaerobic tank 2 by the sludge conveying apparatus. The workpieces flowing through the A portion of each of the media barrier plates 14 are finally discharged through the outlet 27.

The contact medium used in the present invention is a porous plate-like, easy to attach microorganisms, low cost, excellent durability, any product can be used, vinyl chloride resin products or polyethylene resin products have been shown to exhibit a good effect.

The odor generated in the anaerobic tanks 2 and 3 and the odor generated in the nitrogen gas, the contact aeration chamber 4 and the final precipitation chamber 5 are discharged to the outside through the exhaust port 24, and the state of the septic tank 1 And the manhole 25 which can check the microbial state of the contact aeration tank 4 at any time is provided.

Example

Hereinafter, the present invention will be described in more detail with reference to Examples.

Table 1 shows the results of operating the sewage treatment apparatus according to the present invention having the structure described above in the laboratory and operating from August 1996 to October 1997. The values in Table 1 are the average values during the entire test period, and the influent was directly collected from the sewage septic tank storage tank of the apartment. The runoff was collected 1-2 times a week and analyzed according to the Standard Methods.

Unit: mg / L Metric Yu can Outflow Removal efficiency (%) BOD 223 4.5 98.0 COD 422 42 90.0 SS 242 4.9 98.0 TKN 64 6.5 89.8 T-P 12.5 5.4 56.8

From the above experimental results, the average BOD removal efficiency of the sewage treatment apparatus according to the present invention was 98% or more and COD removal efficiency was 90% or more, and the removal efficiencies of nutrients TKN and TP were 90% and 57%, respectively. It was found to be high and a very satisfactory result was obtained with a BOD of effluent not exceeding 5 mg / L.

Household sewage treatment system according to the present invention as described above,

First, it is possible to remove manure and household wastewater discharged from home at the same time, and it is expected to contribute to groundwater pollution and river pollution reduction because no long tea pipe is needed.

Secondly, by developing and applying microbial community (Bio-clod) with excellent organic material removal, it is excellent in organic material removal ability and nutrient removal ability by applying and installing in microbial control tank, and acts as a buffer for chlorine-based bleach and detergent included in inflow water. The floc formation was excellent and the treated water quality was very good.

Third, the contact type anaerobic tank is installed, and a large amount of denitrification microorganisms are secured in the contact medium to remove nitrogen through the denitrification reaction.

Fourth, in order to prevent sluggish sludge flowing into the filtration cracking chamber by installing a sludge settling section in order to prevent efficiency degradation and sludge decay of the filtration cracking chamber due to precipitation of pin-floc flowing into the filtration cracking chamber, It is a high efficiency living sewage treatment system.

Claims (8)

A first anaerobic tank (2) for sedimenting and anaerobic digestion of contaminants, sedimentable solids and returned sludge mixed in the object to be treated; A second anaerobic tank (3) for anaerobic digestion of the processed material passing through the first anaerobic tank (1) and denitrification and dephosphorization by anaerobic tank contact media; Part of the raw water flowing into the first anaerobic tank (2) is introduced into the microorganisms and microorganisms native to the microbial inoculation pumice (Bio-clod) eluted and activated microorganisms contact the aeration chamber (4) And microbial adjustment tank (7) for supplying; By continuously supplying air to the to-be-processed object via the anaerobic tanks (2, 3), the organic material is increased by the activity of the aerobic microorganisms attached to the flexible plate-like contact media having flexibility and the microorganisms supplied from the microorganism control tank (7). A contact aeration chamber 4 for promoting decomposition; The final settling chamber 5 connected through the opening of the bottom of the dividing wall of the contact aeration chamber 4, and the bottom of the final settling chamber 5 has an inclination and flows from the contact aeration chamber 4. Some of the final settling chamber 5 is internally conveyed by gravity, and is conveyed to the first anaerobic tank by a sludge conveying device 12 sludged to settle in the final settling chamber 5; And And a filtration decomposition chamber (6) filled with a medium in which untreated organic substances are precipitated and biologically decomposed in the processed materials passed through the final precipitation chamber (5). 2. The apparatus of claim 1, wherein the volume ratio of the first anaerobic tank (2) and the contact type second anaerobic tank (3) is 1.5: 1 to 3: 1. The raw water is supplied only to the first anaerobic tank (2) when the amount of raw water flowing into the first anaerobic tank (2) is small. High efficiency living sewage treatment system, characterized in that it has an inflow flow rate control device (8) having an inlet pipe (17) to the microorganism control tank (7) at a predetermined height to be introduced into the microorganism control tank (7). The method of claim 1, wherein the contact type second anaerobic tank is filled with a floating anaerobic tank contact medium (10) to facilitate denitrification. 2. The microorganism control tank (7) is provided with a control tank diffuser (19) at the bottom of the microorganism control tank (7), on which a microorganism inoculation pumice and mineral-rich crushed stone and mineral layer (21) are placed. (20) is installed, the central part of the high efficiency living sewage treatment apparatus, characterized in that the fluid flow pipe 22 is installed. The apparatus of claim 1, wherein the contact aeration chamber (4) has a large amount of microorganisms by providing a porous contact medium made of polyurethane or vinyl chloride resin therein. The filtration cracking chamber (6) according to claim 1, wherein the filtration cracking chamber (6) prevents the flow of the filled media and the bottom is opened to allow the sludge to flow smoothly and to move smoothly. High efficiency living sewage treatment apparatus, characterized in that a plurality of filter medium flow preventing plate (14) is installed. The sludge settling section (15) and sludge settled in the sludge settling section (15) for collecting the pin-floc that is introduced into the filtration cracking chamber (6) and settled. And a sludge conveying device (16) for conveying the same to the first anaerobic tank (2).

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