KR100236902B1 - Septic tank with high efficiency - Google Patents

Abstract

Household wastewater containing various organic substances is contained in large quantities, especially N, P, and L, which is a source of water pollution due to sub-films.

The present invention is primarily in the form of the anaerobic fermentation tank, anaerobic fermentation tank, aerobic fermentation tank, lowering the BOD, COS, SS in the shortest possible time, so introducing a porous ceramic filter material to the processing system consisting of four stages of biological membrane as well as the N even N _2, etc. It was scattered and P was removed. Therefore, it has fundamentally solved the problem of water pollution, which can be generated by decomposing, fermenting and removing organic matter in the best condition.

Description

High efficiency combined purification tank

The present invention relates to a high efficiency combined purification tank apparatus.

Generally, sewage and manure are treated in sewage treatment plants in areas where sewage treatment is possible. However, in the areas where residential facilities are scattered, such as farming and fishing villages, clean areas, and water supply protection areas, it is not easy to treat them. It is an uneconomical method that requires excessive use of auxiliary equipment such as collection pipes.

Existing manure septic tanks do not include other household sewage except for manure, and after treatment, high concentrations of BOD of 150ppm or more are discharged to rivers, accelerating water pollution, and accelerating water pollution. Internal and external products have also failed to take fundamental measures against the removal of nitrogen and phosphorus, which cause eutrophication of streams and lakes, and red tide that causes damage to fish farms in nearby waters each year. In 1996, regulations on nitrogen and phosphorus were introduced to solve the pollution problem, and legislative notice was announced to allow the treatment of manure septic tanks.

The present invention is a new technology related to a combined septic tank and waste water purification facility for integrated treatment of rainwater and manure discharged from each household using a composite biofilm process, and can remove nitrogen and phosphorus simultaneously as well as remove existing organic matter and suspended solids. It combines the concept of a suspended growth system in which microorganisms are suspended, and an attached growth system in which microorganisms are attached to media and grow. Introduces a complex biofilm process that allows the filtration, adsorption and decomposition of microorganisms of solid-liquid organic matter by a special catalyst carrier to be carried out in combination, thereby solving the operational problems of existing septic tanks and wastewater purification facilities. To the provision of types of septic tanks and sewage treatment facilities.

The present invention has also been developed for the purpose of the integrated treatment of household sewage and manure, and according to the size of the treatment, it is possible to perform not only the function of the individual septic tank but also the role as a simple sewage purification facility for farming and fishing villages. In the case of co-treatment of existing sewage and flush toilets, the effective septic tank size could not be effectively treated. However, the present invention can be applied as a sewage purification facility without the addition of additional processes in the co-treatment of household wastewater and manure. It is possible.

The present invention also provides a process for the treatment of anaerobic, random and aerobic conditions by a composite biofilm process (filtration, adsorption, and decomposition combined process) for nitrogen and phosphorus removal, and by filling a porous ceramic media (synthetic active ceramic catalyst carrier). The biodegradation and the removal of nitrogen and phosphorus by adsorption and filtration can be induced by utilizing the treatment function by growth and adhesion growth. In addition, the function of the flow control tank is required when most of the living sewage cycles with the maximum flow rate generation period and the sudden change of concentration and quantity occurs. However, having a separate flow control tank in a small, individual merger and purification tank requires additional expense and area consumption. Therefore, the device can perform sufficient flow adjustment functions while reducing the economic burden and the processing area available. It is an object of the present invention to not only introduce an air lift apparatus which can be used, but also that the filled special catalyst carrier has an ability to absorb flow rate and concentration load variation.

Fig. 1 (a) is a cross-sectional view of a small scale septic tank.

Figure 1 (b) is a side cross-sectional view of a small septic tank.

2 is a side cross-sectional view of a large septic tank.

3 is a graph of total nitrogen concentration change over time.

4 is a graph of changes in total phosphorus concentration over time.

5 is a graph of COD concentration change over time.

6 is a graph showing the change in BOD concentration over time.

7 is a graph showing the change in TSS concentration over time.

* Explanation of symbols for main parts of the drawings

1: reactor 10: second reactor

20: third reactor 30: fourth reactor

5: porous ceramic media layer 2: inlet

9: bulkhead 11: second entrance

P1: conveying piping P2: reflux conduit

40: air pump 50: sedimentation tank

51,52: Stirring device

The present invention relates to a high-efficiency combined-purification tank that purifies and cleans sewage, manure, and the like together.

Wastewater from domestic sewage or manure contains high concentrations of organic matter, large amounts of nitrogen and phosphorus, and is a major factor in eutrophication of rivers. Therefore, it is the most ideal method to separate and collect these waste waters.

However, it is impossible to install sewage pipes such as urban farmhouses, neighborhood neighborhoods, or livestock houses, so it is impossible to install sewage pipes such as cities.

The septic tank of the present invention is basically a structure in which four compartments of the first to fourth reaction tanks (1), 10, 20, 30 are juxtaposed to each other, and the first reaction tank (1) (anaerobic fermentation tank) is porous on one side. There is a primary decomposition filtration tank (3) in which the ceramic filter layer (5) is laminated, and is partitioned from the inlet (2) by the partition wall (9). The accumulated reaction layer) and the porous ceramic media layer 5 are configured to flow backward to the phase, and the first reactor 1 and the second reactor 10 protruded through the porous ceramic media layer 5 pass through the porous ceramic media layer 5. A second decomposition filtration tank (13) partitioned from the partition wall (12) is introduced into the second inlet port (11) through the flow adjustment pipe (P1) so that the waste water can serve as the flow adjustment tank. It is configured to reflux from the bottom to the upper, the second reaction tank 10 and the third reaction tank 20, which is addressed to the inside A plurality of granularly charged ceramic media layers 21 configured to open up and down alternately are arranged at a predetermined interval, but two or more diffuser devices 22 are installed on the lower side thereof to separate air from the diffuser pipes 23. The air supply through the pump 24 is configured to be possible, and the third reaction tank 20 and the fourth reaction tank 30 spoken above have a connection passage in which the third reaction tank 20 and the lower contact portion communicate with each other ( 31) so that the sewage and waste water can be directly introduced into the lower part of the biological filtration tank 32, and the second inlet 11 of the second reaction tank 10 can be recycled by a reflux conduit (P2) connected from the lower center. It is a connected structure.

In the present invention, the first reactor (1), the second reactor (10), the fourth reactor (30) may have a lower portion in the plane, but in the cone shape to facilitate the removal of sludge lowermost sharp part A discharge path can be installed in the

In the present invention, the first reaction tank 1 is an anaerobic fermentation tank, the second reaction tank 10 functions as an anaerobic fermentation tank, and the fourth reaction tank 30 exhibits a function as an aerobic biological medium, and only the third reaction tank 20 is used. The aerobic fermentation was possible under sufficient oxygen supply, and the lower structure mainly composed of conglomerate of gravel size prevented the gravel from being structurally separated by a separate support network (1a) (10a) (30a).

In the present invention, the third reactor 20 is a place that induces aerobic oxidation by supplying sufficient air, and in particular, the ceramic of the present inventors patent No. 207801 used in the granular filling ceramic media layer 21. This ceramic media has a physical, chemical and electrical adsorption capacity such as ion exchange ability because ceramic materials that form fine pores inside are utilized as habitats for various microorganisms and provide sufficient space for microbial death due to the closure of voids. This eliminates the risk and ensures maximum combined functionality in the smallest area. In other words, the electric charge and the chemical adsorption of organic and inorganic substances are induced by the weak charge, and the particle diameter larger than the pores causes the pores to be physically caught. The microorganisms inhabiting the pores grow these organic and inorganic substances as nutrients, To be decomposed and removed.

The fourth reaction tank 30 of the present invention has a function for releasing the finally treated waste water and at the same time allows the partial decomposition of the nitric oxide and the remaining undegraded product by the action of the partial reflux conduit (P2) to allow complete decomposition. That is, the filtration layer 32 was installed at the lower side by the support net 31a to form the porous ceramic layer 33, and the effluent outlet 34 was formed at the upper side thereof so that only sufficient decomposition filtration was discharged. The bottom layer 34 is provided with a suction port 35 of the reflux conduit P2 to be returned to the second reaction tank via P2.

Air pump 40 according to the present invention is connected to the aeration tank 22 of the transfer pipe (P1), reflux conduit (P2) and the third reaction tank 20 to enable simultaneous transport and aeration by air pressure.

The operational relationship according to the above structural features will be described.

When living sewage, manure, etc. are introduced into the inlet 2 of the first reaction tank 1, partitioned by partition 9, the upper and lower sides of the primary decomposition filtration tank 3 divided into conglomerate and porous ceramic media layers 5 Proceed downward to pass from the top to the bottom, anaerobic food scraps and manure are digested and decomposed.

Subsequently, when introduced into the second inlet 11 of the second reaction tank 10 through the transfer pipe P1, it passes through the second decomposition filtration tank 13 divided into the partition 12 in the same form as the first reaction tank. The same anaerobic digestion continues.

The characteristic of the second reactor is that the organic nitrogen is gasified by transforming the nitrogen oxide (NOx) form into N2 form by anaerobic decomposition.

After passing through the second reaction tank (10) is proceeded to the third reaction tank (20) and the adsorption filtration conditions in the packed ceramic media layer 21 by the various aerobic microorganisms by the various aerobic microorganisms removal and removal of microorganisms of P and nitrification of ammonia The reaction is active. After passing through the third reaction tank is directly supplied to the connecting passage 31 communicated to the lower side, the part is flowed back to the second reaction tank through the reflux conduit (P2) and part is discharged to the outside through the decomposition filtration layer (32). At this time, the discharged water is characterized by having a concentration of at least 20ppm or less.

In the present invention, the transfer pipe (P1) of the first reaction tank (1) is installed on the porous porous media layer (5) of the upper side of the decomposition filtration tank (3) to enable the reaction tank to be used as a space for adjusting the flow rate. That is, the lower suction port P1 is disposed close to the upper portion of the filter layer 5, so that the flow rate adjusting function is exerted.

Provided as yet another second embodiment of the present invention is the medium to large scale system of FIG. The basic configuration is the same as that of the first embodiment of FIG. 1, but the larger one is provided with a flow rate adjusting tank separately in front of the first reaction tank, and a precipitation tank 50 is provided between the fourth reaction tank and the third reaction irradiation (FIG. 2 hidden line). Display portion), the first and second reaction tanks were allowed to install agitator (51, 52), the second reaction tank may not be provided with a porous ceramic media layer (5), the discharge water pump (53) It was installed in the fourth reactor to allow the backwash of the porous ceramic cracking tank as well as the discharge.

The sludge collected in the sedimentation tank 50 was subjected to dehydration treatment through a separate concentration tank 54 and a storage tank 55.

In another third embodiment of the present invention, if the denitrification efficiency is not required, general biological oxygen demand (BOD) or suspended solids (SS) removal can be processed even if the second reactor is omitted, so that it is suitable for the purpose of the purification facility. It can also be economically constructed. At this time, the reflux conduit (P2) was induced to be refluxed to the first reactor.

The actual test example according to the apparatus of the present invention will be described and the effect thereof will be described.

The housing in the water supply protection area where two adults and three children per household were selected was subjected to microbial planting using a return sludge from a sewage treatment plant in a decomposition filtration tank. This is to shorten the time since the natural growth of microorganisms takes considerable time initially.

The apparatus shown in FIG. 1 of this invention and the product of I company in Japan were arranged in parallel, and the waste water discharged from the said household was divided into 2 minutes, and it supplied to each.

The company's product is a structure using anaerobic reactor filter media made of PVC or PE and aerobic reactor filter material in which the cilia are in the form of ropes.

Graphs showing changes over time for changes in total nitrogen concentration (TN), total phosphorus concentration (TP), total COD (TCOD), BOD, and total SS (TSS) of the device of the present invention and the company I products are shown in FIGS. 7th. Here, the circled points are measurements of company I, and the squared and triangular points indicate the discharge from the device of the present invention. In other words, firm I's product changes from 25 to 70 for total nitrogen until 4-15 for total phosphorus, 40 to 150 for TCOD, 50 to 170 for BOD, and 30 to 170 for TSS. On the other hand, it came out through the apparatus of the present invention maintains almost uniform deviation of less than 20mg / l total nitrogen, less than 4mg / l total phosphorus, less than total cos 20mg / l, less than 40mg / l BOD, less than 25mg / l TSS Shows excellence.

Another feature of the present invention is that the purification system of any size of small and medium can be installed, so that its application range is wide. In addition, in the case of domestic sewage, a large amount of waste and waste water is discharged at a predetermined time (for example, breakfast preparation time or dinner preparation time), and at this time, the transfer pipe (P1) of the first reaction tank 10 is at the top of the anaerobic reactor filling medium layer. The upper part of the decomposition filtration tank (flow control part) was kept empty for a certain period of time, and the excess waste water was stored here so that untreated waste water was discharged. .

Claims (5)

At least four partitioned first to fourth reactors (1) (10) (20) and (30) are arranged in parallel with each other, and the first reactor (1) has a first decomposition in which a porous ceramic media layer (5) is laminated on one side. There is a filtration tank (3), which is partitioned from the inlet (2) by the partition wall (9), so that only the upper and lower sides of the inlet and the waste water are introduced, so that only the reverse flow of the conglomerate layer and the porous ceramic media layer (5) is carried out to the bottom. The first reactor 1 and the second reactor 10, which are addressed above, have a flow rate so that the waste water that has passed through the porous ceramic media layer 5 can serve as a flow control tank. The second reaction tank (10) is configured to flow back from the lower portion to the upper portion of the second decomposition filtration tank (13) partitioned with the partition wall (12) through the adjustment transfer pipe (P1). The third reaction tank 20, which has been addressed with, has a plurality of granularly charged ceramic media layers 21 to be opened up and down alternately therein. The aeration tank 22 is arranged at a lower side thereof, but two or more aeration tanks 22 are installed at the lower side thereof, so that air can be supplied through the air pump 24 by separate diffuser pipes 23, and the third The reaction tank 20 and the fourth reaction tank 30 spoke have a connection passage 31 in which the third reaction tank 20 and the lower contact portion communicate with each other, so that the waste water flows directly into the lower portion of the biofiltration layer 32. A high efficiency combined purification tank device configured to be connected to the second inlet port 11 of the second reactor 10 so as to be recirculated by a reflux conduit P2 connected from the center bottom. According to claim 1, wherein the flow rate adjustment tank in which the flow rate adjustment pump is installed in front of the second reaction tank was installed separately, and the settling tank (50) was installed between the fourth reaction vessel and the third reaction irradiation, and the lower side of the first reaction vessel and the second reaction vessel. Stirring devices (51) and (52) were installed, but the porous ceramic filter layer was removed in the second reaction tank, and the discharge water pump (53) was installed in the fourth reaction tank so that the porous ceramic cracking tank could be backwashed together with the discharge. Medium and large-sized high-efficiency combined purifier. The high efficiency combined-purification tank apparatus according to claim 1, wherein the reflux conduit (P2) is directly connected to the inlet of the first reactor (1) by omitting the second reactor (10). The high efficiency combined-purification tank apparatus according to claim 1, wherein the lower portion of the inlet port (P1 ') of the transfer pipe (P1) is disposed above the porous ceramic media layer (5). The porous ceramic media according to claim 1, wherein each of the packing media in the first reactor (1), the second reactor (10), the third reactor (20), and the fourth reactor (30) is capable of filtration adsorption and biodegradation. High efficiency combined septic tank device, characterized in that consisting of.