KR100449138B1 - Biofilter sewage treatment method using highly hydrophilic filter media - Google Patents

Abstract

PURPOSE: To provide a method for environmentally treating organic matter and nutrients of sewage and wastewater by using an intermittent aeration tank in which highly hydrophilic filter media is installed and a constructed wetland. CONSTITUTION: In a method for treating sewage and wastewater by passing sewage and wastewater through anaerobic septic tank (10), flow equalizer (20), intermittent aeration tank (30) and sterilizing tank (60), wherein a porous and highly hydrophilic filter media having continuous pores is installed in the intermittent aeration tank, the biofilter sewage and wastewater treatment method using highly hydrophilic filter media is characterized in that the porous highly hydrophilic filter media is formed of one or more materials selected from melamine foam, pulp foam, cellulose foam and rock wool, wherein intermittent aeration is performed by using an air fan capable of operating blocking and supplying of air.

Description

Biofilter sewage and sewage treatment method using high hydrophilic media {BIOFILTER SEWAGE TREATMENT METHOD USING HIGHLY HYDROPHILIC FILTER MEDIA}

The present invention relates to a sewage and sewage treatment method, and more particularly, to a biofilter sewage and sewage treatment method using a high hydrophilic filter medium composed of intermittent aeration tank and artificial wetland where a high hydrophilic filter medium is installed.

At present, despite the expansion of environmental foundations such as sewage segregation and sewage treatment plants, eutrophication of river and lake water quality still exists. In particular, domestic sewage and sewage in distributed areas where sewage pipes are not properly installed are considered as the main factors for this eutrophication.

Dispersed areas are rural villages, military units, small multi-unit houses, and resorts. Sewage and sewage treatment facilities installed in these areas should consider the following.

First, it is difficult to install sewage and sewage pipes regionally and economically. Second, it is difficult to manage the connection to the sewage treatment plant. Second, it is difficult to maintain the facility because the manager is unable to reside due to the distributed and small relationship. This is because they are very sensitive to noise, and fourthly, the flow fluctuations are very severe over time and season, and finally, the treatment water is discharged directly into the river or farmland, so it should not cause secondary pollution.

However, treatment facilities for distributed areas developed to date are not developed for distributed areas only, and most of them have large scale sewage treatment methods applied by simply reducing the scale or modifying some processes. Not suitable for sewage treatment.

Currently, there are maternal infiltration trench method, activated sludge method, catalytic oxidation method, contact aeration method, water spraying method, etc., but these treatment methods are used for the maintenance of facilities and deterioration of treatment efficiency. The operation of the facility was frequently stopped or there were many difficulties in maintaining a stable treatment efficiency.

In addition to the classical techniques described above, techniques using advanced biological treatment are being distributed to sewage and sewage treatment in dispersed areas.However, most of the processes are developed by simply reducing the size of the method developed for large-scale or medium-scale sewage treatment. It requires a lot of mechanical equipment, and additional equipment and equipment for sludge conveyance, etc. are required for the advanced nitrogen treatment, and regular sludge discharge removal is required. In addition, the technology using the biological advanced treatment is weak in response to the fluctuation of flow rate, it is difficult to form a sufficient biofilm when the inflow of sewage or sewage is small or stopped, the desorption phenomenon of microorganisms appear during severe flow fluctuations, suddenly a large amount of sewage (B) Inflow of sewage deteriorates the treatment efficiency, so it shows good efficiency in urban and commercial areas where continuous and stable sewage and sewage are generated, but it is disadvantageous in applying to dispersed areas.

In an attempt to overcome these problems, techniques have been proposed that consider the characteristics of sewage and sewage in dispersed areas, for example, natural purification, soil treatment, and biofilters. These technologies are easy to maintain and show technological advances by minimizing power and facilities.However, natural purification and soil sewage treatment methods are vulnerable to high concentrations and require a lot of land area and performance deterioration problems such as fading. It is difficult to maintain in winter.

However, biofilter technologies have been developed with fixed contact media that have a relatively stable treatment efficiency throughout the year, a simple process, a relatively small site area, and easy maintenance. These devices mainly use wood, polyurethane foam, minerals, etc. These are techniques used as media.

However, since the conventional media used in the biofilter processes are mostly hydrophilic materials, it takes a long time for the microbial membrane to be completely formed. Moreover, non-hydrophilic media can not expect a stable treatment efficiency because it is difficult to secure sufficient residence time for sewage and sewage treatment, and problems such as deflection flow due to flow through walls or water channel phenomena when supplying sewage and sewage, In addition, microorganisms inhabit only the surface of the filter media, resulting in a decrease in efficiency.

Furthermore, the conventional media are used in aerobic conditions with continuous air supply, and were developed primarily for the removal of organic substances by aerobic microorganisms attached to the media surface, so expect denitrification for the treatment of nutrients such as nitrogen. Has a difficult disadvantage.

It is an object of the present invention to provide a method for environmentally friendly treatment of organic materials and nutrients in sewage and sewage using intermittent aeration tanks and artificial wetlands equipped with highly hydrophilic media.

1 is a process chart of the biofilter sewage and sewage treatment method of the present invention

2 is an intermittent aeration tank filled with a high hydrophilic filter medium

3 is a schematic view showing the underground installation type

4 is a schematic view showing the installation in the form of a prefabricated building

5 shows the structure of a high hydrophilic filter medium

* Description of the major symbols used in the drawings *

10: anaerobic decay tank, 20: flow adjustment tank, 30: intermittent aeration tank,

50: ecological treatment tank, 60: sterilization tank, 70: transparent lightweight roof

55: above ground, 52: soil, 51: plant,

Hereinafter, the technical configuration of the present invention for achieving the above object will be described in detail.

The intermittent aeration tank of the present invention uses a porous high hydrophilic medium. In general, a variety of hydrophilic materials exist, but not many porous and high hydrophilic materials. Such porous high hydrophilic media includes melamine foam, polyvinyl alcohol foam, pulp foam, cellulose foam, and rock wool.

In addition to the above media, ceramic media, rock media, carbon fiber media, wood media, glass fibers, non-woven fabrics, various slags, etc. can be used, but the hydrophilicity is difficult to expect the same effect.

Porous high hydrophilic media is a material with excellent ability to absorb water instantaneously and continuously retain water once absorbed. It is characterized by having fine continuous pores. In the present invention, the microporous serves to prevent microorganisms from attaching in large quantities and to prevent detachment of the microorganisms attached thereto.

In particular, the high hydrophilic filter medium used in the present invention has a merit that the pores are continuously formed so that microorganisms, sewage, sewage or air can be freely moved, and smooth supply of air is possible.

The porous high hydrophilic media absorbs sewage or sewage, which is tens of times to hundreds of times its volume when supplied with sewage or sewage. Deflection flow can be prevented, thus eliminating the need for additional devices such as skirts that are conventionally used.

In the present invention, the porous high hydrophilic filter medium is installed in an intermittent aeration tank, and the intermittent aeration tank is a biochemical reaction tank capable of arbitrarily forming aerobic and anaerobic conditions. In an intermittent aeration tank, microorganisms adsorb and decompose organic matter under aerobic aerobic conditions and convert ammonia nitrogen in sewage or sewage into nitrate nitrogen. When the air in the reactor is blocked, it becomes anoxic condition, and organic matter of sewage or sewage and nitrate nitrogen in nitrified sewage or sewage are removed by denitrification of denitrifying microorganisms.

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

1 is a flow chart illustrating two forms of application of the present invention. Referring to application method 1 of FIG. 1, first, large particles and contaminants of introduced sewage or sewage are filtered out or settled in an anaerobic decay tank 10, and if the existing facility is implemented to carry out the present invention, it is already installed. It is possible to replace the anaerobic decay tanks of the present invention with treatment facilities such as single septic tanks, three stage septic tanks and sedimentation tanks, and some existing improvements to these existing facilities are necessary.

Sewage or sewage through the anaerobic decay tank (10) is supplied to the intermittent aeration tank (30) according to the water level automatically adjusted in the flow adjustment tank (20). The intermittent aeration vessel 30 is filled with porous high hydrophilic media, and microorganisms attached thereto process organic materials and convert ammonia nitrogen to nitrate nitrogen.

The treated water passing through the intermittent aeration tank (30) is introduced into the ecological treatment tank (50), and nutrients such as residual nitrogen and phosphorus are adsorbed and decomposed by the soil (52) having the characteristics of the plant base and the media. It is then absorbed by the plant 51 and finally discharged after sterilization in the sterilization tank (60).

The treated water that has undergone the entire process can be reused for various purposes such as heavy water or agricultural water. If necessary, the ecological treatment tank 50 and the sterilization tank 60 may be omitted.

The intermittent aeration tank 30 will be described in detail with reference to FIG. 2 as follows.

The sewage or sewage supplied intermittently to the reaction tank 31 through the sewage and sewage inlet pipes 32 is deposited on the porous high hydrophilic media layer 36 stacked on the lower support 35 in the form of a net through the injection nozzle 33. Injection 34.

The injection nozzle 33 should not be blocked by foreign matters of about 3 mm, and evenly supplied and injected sewage or sewage without bias of the injection amount is slowly absorbed by the porous high hydrophilic media layer 36 and then moved downward 37 by gravity. .

The upper and lower portions of the intermittent aeration tank 30 are provided with a low noise and low power fan that can block the air (38b, 39b) and supply (38a, 39a), the air flows upstream (39) when supplying air Feed to make the reactor aerobic.

Many of the microorganisms formed in the media under aerobic conditions remove organic matter from sewage or sewage and convert ammonia nitrogen into nitrate nitrogen.

When the inlet air is blocked by a fan capable of blocking the air (38b, 39b), the anoxic tank condition is formed in the intermittent aeration tank and the inside of the media after residual oxygen consumption. Nitrified sewage or sewage in aerobic conditions is denitrified by denitrification microorganisms attached to the media and removed with nitrogen gas.

In addition, organic substances in sewage or sewage remaining and organic substances adsorbed to the media are consumed as a carbon source during the denitrification process, which enables more efficient advanced treatment. Treated sewage or sewage is gradually pushed down by the sewage or sewage supplied intermittently from the top of the reactor.

The pushed-down treated water falls to the bottom of the device to maintain a constant water level 40, and maintains the same level as the level of the treated water collected at the bottom of the device through a pipe 41 that serves to block the inflow of air inside and outside. The discharge 42 is carried out to the outside of the reactor.

The process in the ecological treatment tank 50 will be described in detail with reference to FIGS. 3 and 4 as follows.

Figure 3 shows an example of the underground installation of the present invention, the anaerobic decay tank 10, the flow control tank 20, the intermittent aeration tank 30, which is the treatment process facility shown in the application method of Figure 1 below the ground portion 55 Is placed in the basement (30A).

By placing the ecological treatment tank 50 above the ground to fill the soil 52 that can simultaneously perform the role of the planting base and the adsorption media, the plant 51 is planted.

Here, the ecological treatment tank can be constructed as a concrete structure in the underground (30A) layout type installation as shown in FIG. 3, and when using the prefabricated building as shown in FIG. 4, the ecological treatment tank can also be constructed as a plate and a water tank made of plastic material. have.

Soil 52 can maintain the roots of the plant, it is possible if the soil that is excellent in the adsorption of nitrogen or phosphorus can provide an efficient soil microbial growth environment.

Plant 51 that can be used in the present invention can be applied to aquatic plants exhibiting excellent water purification effect, such as yellow irises, irises, irises, babies, moon roots, etc., good landscape and showing a strong growth in a relatively humid place have.

Since the present invention treats most organic matter and suspended matter in the intermittent aeration tank 30, it prevents the coloration of the ecological treatment tank 50 according to the long-term operation, and the residual nitrogen and the treatment lacking only in the intermittent aeration tank 30. Phosphorus is treated in the ecological treatment tank 50 by the adsorption process by the soil 52, the absorption process by the plants 51, and the decomposition process by the soil microorganisms.

This ecological treatment can produce aesthetically stable natural hydration. In addition, to ensure a stable residence time of influent sewage or sewage, and to increase the flow distance in a limited area by passing through the zigzag equation (54) for more stable treatment.

Figure 4 shows an example of the construction using a prefabricated construction and lightweight structure, anaerobic decay (10), which is the treatment process facility shown in the application method of Figure 1 in a prefabricated building structure (30B) with good insulation and economical and easy to construct, The flow control tank 20 and the intermittent aeration tank 30 were disposed, and a greenhouse with a transparent lightweight roof 70 made of plastic was installed along the periphery using the outer wall of the building, and the soil was placed in a tank disposed about 1 m below the ground. An ecological treatment tank 50 filled with 52 is placed. The ecological treatment tank 50 may be installed in addition to the concrete plate of a plastic material or a metal container that is easy to assemble and construct.

In case of reuse of treated water, a sterilization facility can be installed inside. When applied to this installation example, the treatment efficiency is stable enough without special heating even in winter, and the surrounding area of the treatment facility is surrounded by plants and flowers, which can improve the landscape and give aesthetically positive effect.

[ Comparative example One] High hydrophilicity Media and existing Media compare

Sewage and sewage uptake and instantaneous absorption of media have a significant impact on sewage and sewage retention times, treatment efficiency, deflection flow and deflection when there is injection or watering of sewage and sewage.

Therefore, in Comparative Example 1, the dry weight, instantaneous absorption weight, and deposition absorption weight of the high hydrophilic contact media of the present invention and the media applied to the existing similar treatment apparatus are tested, and the results are shown in Table 1.

Each medium was tested to have a porous characteristic, and the standard used was a cubic shape of 4 cm in width, length, and height. The instantaneous absorption weight was removed after contacting each filter medium with water for 1 second, excluding the amount of water lost by gravity, and then weighing.

Submerged absorption weight was removed by contacting with water sufficiently and then weighed in the same manner as the instantaneous absorption weight. In addition, the comparison was made by quantifying the ratio of the absorption to dry weight for relative evaluation.

The media used in the experiments are melamine foams, PVA foams, rock wool, cellulose foams, which are the high hydrophilic media used in the present invention, and porous foams made of polyurethane are used in similar methods for comparison. Polyurethane foam 1) and large (polyurethane foam 2) were used for comparison.

The results of Table 1 show that the high hydrophilic media of the present invention have superior instantaneous absorption and less difference between the instantaneous absorption and the depositional absorption compared to polyurethane foams.

These results demonstrate that high hydrophilic media have the ability to absorb large amounts of water instantaneously and retain them for a long time. In the biofilter-type treatment device that supplies sewage or sewage by spraying or spraying, it is not only excellent in treatment efficiency because of sufficient treatment time due to a material having a large capacity for absorbing sewage or sewage, but also generated when sewage or sewage is supplied It is possible to prevent the sewage or sewage deflection flow due to the sewage or sewage of the sewage or the channelization phenomenon.

Highly hydrophilic media showed a generally similar trend, but the relatively light weight of melamine foam absorbed the largest amount and absorbed about 120 times its own weight.

Comparison of high affinity media and general media Dry weight (A) Instantaneous absorption weight (B) Immersion Absorption Weight (C) B / A ratio C / A ratio Melamine foam 0.51 g 61.25 g 62.86 g 120.78 123.96 PVA Foam 2.26 g 46.82 g 57.56 g 20.71 25.47 Rock wool 3.89 g 49.71 g 54.52 g 12.78 14.06 Cellulose Foam (Pulp Foam) 1.65 g 54.43 g 60.28 g 32.99 36.53 Polyurethane Foam 1 (Comparative Example) 1.29 g 3.89 g 47.40 g 3.00 36.61 Polyurethane Foam 2 (Comparative Example) 1.91 g 23.11 g 33.30 g 12.07 17.40

[ Comparative example 2] Evaluate the coping ability by blocking the sewage and sewage supply

After 10 minutes, 1 hour, 3 hours, 24 hours, one week and one month after the water is sufficiently sprayed for 30 seconds in the reaction tank filled with a high hydrophilic media according to the present invention and the reactor filled with polyurethane foam media The weight of sewage held by the company was measured and compared.

The media used in the experiments were cubes of 4 cm in width, length, and height, and 5 pieces were randomly selected prior to filling the media and the respective weights were measured. In the same manner as in 1, after completely immersing in sewage, the weight was measured and used as the reference for retention rate ⁽²⁾ .

The weight of each media and the weight of each media measured by randomly taking three media at the top of the reaction vessel for each time period were divided by the initial total deposition weight and the retention ratio ⁽²⁾ is shown.

Looking at the results shown in Table 2, there is a slight difference depending on the media, but similarly to Comparative Example 1, the absorbency of the high hydrophilic media was very good compared to the polyurethane foam media, especially when the sewage was supplied by spraying water, Hydrophilic media were much better.

That is, most of the high hydrophilic media used in the present invention showed a retention of 90% or more, but only 39% of the polyurethane foam media. After 30 days, most of the high hydrophilic media had sewage that can be judged by the naked eye and by hand.However, in the case of the polyurethane foam media, a considerable amount of sewage was lost after 7 days. Most of the sewage was removed except for the remaining contaminants, and after 30 days, the retention rate was 6%. This 6% was judged to be the weight due to the accumulation of contaminants.

As can be seen from the results of the experiment of Comparative Example 2, the Bao filter method for sewage and sewage treatment using high hydrophilic media has a situation where the supply of sewage or sewage is interrupted during the operation of the apparatus, or due to mechanical failures and maintenance of the equipment or equipment. Even if it occurs, it has been proved that it can be operated without killing or eliminating microorganisms. In addition, when the treatment plant is restarted, it can be normalized within a shorter time, and thus, it is considered to be superior to other treatment facilities and devices in terms of protection and stability of the facility.

Assessment of the coping capacity according to the sewage or sewage Measuring time Comparison of sewage reserves and retention rates by media over time Melamine foam PVA Foam Rock wool Cellulose Foam (Pulp Foam) Polyurethane foam Measured value (g) Retention rate ⁽²⁾ (%) Measured value (g) Retention rate ⁽²⁾ (%) Measured value (g) Retention rate ⁽²⁾ (%) Measured value (g) Retention rate ⁽²⁾ (%) Measured value (g) Retention rate ⁽²⁾ (%) Sprinkler ⁽¹⁾ 0.5 0 2.3 0 3.7 0 1.7 0 1.8 0 Immersion absorption 64.2 100 57.7 100 53.6 100 63.3 100 32.0 100 10 minutes 61.6 96 54.2 94 47.7 89 55.5 92 12.1 39 1 hours 57.0 89 50.2 87 34.8 65 50.0 83 8.1 26 3 hours 55.1 86 40.9 71 27.9 52 48.8 81 7.1 23 24 hours 44.2 69 27.7 48 23.6 44 37.9 63 4.0 13 7 days 38.4 60 19.0 33 21.9 41 29.5 49 2.5 8 30 days 32.6 51 15.0 26 19.3 36 27.1 45 1.9 6.6

(1) Before sprinkling: The average value of the weight of the initial media according to each media was shown, and the retention rate was 0%.

(2) Retention rate: Average value of the measured weight of each filter medium / deposit absorption weight (see Comparative Example 1) after the passage of time

[ Comparative example 3] in aerobic conditions High hydrophilicity Media and Polyurethane foam Sewage and Sewage Treatment Efficiency Comparison

The high hydrophilic contact media and the polyurethane foam media according to the present invention were charged into the same biofilter reactor and operated for 6 months at 200 L / day influent sewage while maintaining aerobic conditions. The results showed that high hydrophilic media such as melamine foam, PVA foam, rock wool, and pulp foam showed more than 90% treatment in BOD and SS water quality items, while polyurethane foam also showed good BOD and SS treatment rates. In the treatment of nutrients such as nitrogen and phosphorus, all the media showed treatment efficiency of less than 30% under the conditions of Comparative Example 3. As can be seen from the experiments, aerobic conditions showed good treatment efficiency except for the removal of nutrients such as nitrogen and phosphorus. In the aerobic conditions as in Comparative Example 3, the characteristics of the high hydrophilic media were not noticeable.

Sewage Treatment Efficiency of High Hydrophilic Media and Polyurethane Foam Analysis item Influent Source Concentration (mg / L) Treated water by media of aerobic reactor Melamine foam PVA Foam Rock wool Cellulose Foam (Pulp Foam) Polyurethane foam Measured value (mg / L) Throughput% Measured value (mg / L) Throughput% Measured value (mg / L) Throughput% Measured value (mg / L) Throughput% Measured value (mg / L) Throughput% BOD 141.5 8.8 93.8 10.2 92.8 14.4 89.8 9.2 93.5 16.2 88.6 SS 84.2 4.6 94.5 5.1 93.9 7.5 91.1 6.5 92.3 10.8 87.2 TN 55.3 39.5 28.6 41.7 24.6 43.6 21.2 40.7 26.4 43.6 21.2 TP 18.7 15.3 18.2 16.1 13.9 13.5 27.8 14.9 20.3 16.2 13.4

[ Comparative example 4] in intermittent aeration conditions High hydrophilicity Media and Polyurethane foam Media Nutrient Removal Efficiency Comparison

This Comparative Example 4 was carried out to investigate the difference and characteristics of the treatment efficiency difference between the intermittent aeration tank using the high hydrophilic filter medium and the intermittent aeration tank using polyurethane foam, in particular, the removal efficiency of nutrients such as nitrogen and phosphorus .

After filling the intermittent aeration tank with high hydrophilic media and polyurethane foam media, the aerobic and anaerobic conditions were added alternately at 3 hour intervals, operating for 6 months at 200 L / day inflow as in Comparative Example 3 The average value measured is shown in Table 4.

Referring to the results of Table 4, the melamine foam, PVA foam, rock wool, pulp foam, etc., which are highly hydrophilic media different from Comparative Example 3, showed that BOD and SS showed a treatment rate of 90% or more similar to Comparative Example 3, but the polyurethane The foam had a treatment rate of about 10% reduced compared to Comparative Example 3.

This difference seems to be due to the fact that the high hydrophilic media not only absorbs sewage and sewage sufficiently, but also has sufficient retention time for stable treatment.

This difference is even more apparent in terms of the processing efficiency of nutrients such as nitrogen and phosphorus. In other words, under aerobic conditions as in Comparative Example 3, no denitrification reaction was performed, and thus the treatment efficiency was less than 30%. However, when air was intermittently supplied as in Comparative Example 4, 60% or more of the melamine foam was treated. It shows efficiency.

In addition, although the difference was shown by the media, most of the high hydrophilic media showed an increase in nitrogen treatment rate. On the other hand, a slight increase in the treatment efficiency was observed in the polyurethane foam, but there was no satisfactory effect.

This is because the retention time of the sewage is shorter than the high hydrophilic media due to the characteristics of the polyurethane foam, so the retention time is short, and thus, sufficient treatment was not achieved.

Comparison of Treatment Efficiency between High Hydrophilic Media and Polyurethane Foam Media in Intermittent Aeration Conditions Analysis item Influent Source Concentration (mg / L) Treated water by media of aerobic reactor Melamine foam PVA Foam Rock wool Cellulose Foam (Pulp Foam) Polyurethane foam Measured value (mg / L) Throughput% Measured value (mg / L) Throughput% Measured value (mg / L) Throughput% Measured value (mg / L) Throughput% Measured value (mg / L) Throughput% BOD 121.2 7.5 92.9 11.4 90.6 9.8 91.9 8.5 93.0 19.8 78.2 SS 58.5 3.2 94.5 4.6 92.1 5.5 90.6 4.2 92.8 12.9 77.9 TN 39.8 14.7 63.1 20.4 53.0 24.9 48.5 16.8 57.8 25.4 36.2 TP 12.4 8.5 31.5 12.2 28.2 15.5 34.7 10.2 27.4 15.5 16.9

Highly hydrophilic media has a relatively sufficient retention time due to the instantaneous and high sewage absorption compared to existing media such as polyurethane foam, and organic materials and nutrients by alternating aerobic and anaerobic conditions through air supply and blocking control. Could be processed simultaneously. In addition, in comparison with advanced treatment facilities that require a lot of machinery and equipment, it is believed that the apparatus and method of the present invention will be advantageous for the effective treatment of sewage and sewage in distributed areas in various aspects such as treatment efficiency, economy, and maintenance. do.

[ Comparative example 5] Comparison of Ecological and Sand Filtration Processes

The ecological treatment process according to the present invention was compared with the conventional sand filtration treatment process. In Comparative Example 5, the amount of sewage flowing into the intermittent aeration tank filled with the high hydrophilic filter medium was 200 L / day.

As a result of the evaluation, the treated water in the intermittent aeration biofilter showed that there was no difference between sand filtration and ecological treatment because most organic substances were removed. there was.

However, there was a big difference in the treatment efficiency of nutrients such as nitrogen and phosphorus. In case of sand filtration, the treatment rate of phosphorus slightly increased, but nitrogen was hardly treated. This is because the nitrogen was changed to nitrate nitrogen in the intermittent aeration tank and could not be treated by sand filtration. However, in the ecological treatment process of the present invention, the residual ammonia nitrogen and nitrate nitrogen were significantly reduced due to the absorption and decomposition of soil microorganisms and plants, and the treatment efficiency of phosphorus was also increased. In total throughput, more than 80% of nitrogen and phosphorus were removed.

Comparison of Treatment Efficiency between Soil Ecological Treatment Tank and Sand Filter Analysis item Influent Source Concentration (mg / L) Intermittent Aeration Biofilter Treatment Water Concentration (mg / L) Throughput% Ecological Treatment vs. Sand Filter Treatment Ecological treatment Sand filtration Post-treatment concentration (mg / L) Additional throughput rate (%) Total throughput (%) Post-treatment concentration (mg / L) Additional throughput rate (%) Total throughput (%) BOD 165.5 9.8 94.0 4.2 57.1 97.4 6.1 37.7 96.3 SS 87.8 6.2 92.9 1.8 70.9 97.9 1.6 74.1 97.9 TN 62.4 27.3 56.3 9.2 66.3 85.2 26.1 4.4 58.1 TP 24.9 18.5 25.7 3.2 82.7 87.1 13.5 27.0 45.7

The effects of the present invention are summarized as follows.

The intermittent supply of sewage and sewage ensures a sufficient reaction time by microorganisms, which actively promotes the removal and decomposition of organic substances under aerobic conditions, and promotes nitrification of ammonia nitrogen in sewage and sewage. In addition, under anoxic conditions, it is possible to denitrify the nitrified treated water by using organic substances adsorbed to the media by denitrifying microorganisms and organic substances in sewage and sewage as carbon sources to increase the efficiency of nitrogen removal and to prevent clogging by contaminants. There is.

In the biofilter method using the high hydrophilic filter according to the present invention, by using the high hydrophilic filter having fine continuous pores, it is possible to remove the suspended solids with an excellent filtration function while enabling the initial attachment and growth of a large number of microorganisms.

This high hydrophilic media absorbs the sewage or sewage instantaneously when supplying sewage and sewage, and has the effect of compensating for the disadvantages of sewage and sewage sewage, deflection flow and wall flow without a separate device such as a skirt used in existing methods. have.

In addition, sewage or sewage is retained in the media until re-supply of sewage or sewage, which ensures sufficient treatment time by microorganisms, thereby improving treatment efficiency, and using media having excellent sewage and sewage retention capabilities. Even if there is no supply of sewage or sewage for a long period of several months or more, microbial apoptosis does not occur, and in particular, normalization of treatment efficiency is possible upon resupply of sewage or sewage.

In addition, the ecological treatment tank of the present invention provides stable efficiency in reducing nutrients such as nitrogen and phosphorus by improving many site requirements and increasing efficiency, compared to conventional artificial wetlands, and removing aesthetic rejection of treated water. It can induce water reuse and improve the landscape of the facility, which is expected to reduce the aversion or rejection of sewage and sewage treatment facilities and to increase various space utilization. In addition, it minimizes the mechanical equipment compared with other biological advanced treatments and prevents the maintenance difficulties due to frequent mechanical failures and the operation interruption of the facility.It is possible to operate unattended with a simple control device without special manpower and the sludge of the reactor itself. No treatment is required, which makes maintenance easier compared to conventional advanced treatment facilities that require backwashing or periodic sludge treatment. In addition, it is resistant to fluctuations in the flow rate of sewage and sewage, and can be a sewage and sewage treatment method suitable for a dispersed area.

Claims (6)

Anaerobic decay tank (10), flow adjustment tank (20), intermittent aeration tank (30), sterilization tank (60), In the sewage and sewage treatment method in which the porous high hydrophilic media having continuous voids is installed in the intermittent aeration tank (30), The porous high hydrophilic media is a biofilter sewage and sewage treatment method using a high hydrophilic media, characterized in that any one or two or more selected from melamine foam, pulp foam, cellulose foam, rock wool. Anaerobic decay tank (10), flow adjustment tank (20), intermittent aeration tank (30), ecological treatment tank (50), sterilization tank (60), In the sewage and sewage treatment method in which the porous high hydrophilic media having continuous voids is installed in the intermittent aeration tank (30), The porous high hydrophilic media is a biofilter sewage and sewage treatment method using a high hydrophilic media, characterized in that any one or two or more selected from melamine foam, pulp foam, cellulose foam, rock wool. delete The method of claim 1 or 2, wherein the intermittent aeration is a biofilter sewage and sewage treatment method using a high hydrophilic media, characterized in that using an air fan capable of operating the blocking and supply of air The anaerobic decay tank (10), the flow adjusting tank (20), and the intermittent aeration tank (30) are installed in the basement (30A), and the ecological treatment tank (50) is disposed thereon, so that the soil (52) is removed. Biofilter sewage and sewage treatment method using a high hydrophilic filter medium characterized in that the plant 51 is planted after filling. 3. The soil 52 in the greenhouse according to claim 2, wherein the anaerobic decay tank 10, the flow regulating tank 20, and the intermittent aeration tank 30 are installed in the building 30B and have a transparent lightweight roof 70 therein. Biofilter sewage and sewage treatment method using a high hydrophilic filter medium characterized in that after placing the ecological treatment tank 50 planted plant (51).