KR20020040125A - The Method and Apparatus of Biological High Efficiency Wastewater Treatment Using the Contacting Media for Activated Sludge - Google Patents

Abstract

In the high efficiency biological wastewater treatment system using microorganisms, the present invention not only provides a surface for the settlement of microorganisms but also promotes their proliferation to activate the decomposition of biological organic matter and promotes floc formation by increasing the adhesion of activated sludge. The present invention relates to a biologically efficient wastewater treatment system using an activated sludge carrier capable of increasing sedimentation in a sedimentation tank, and a highly efficient wastewater treatment method using the system.

Specifically, the present invention by providing a mineral component necessary for the growth of microorganisms by promoting the generation and activation of activated sludge floc and by using the active sludge contact carrier for advanced organic wastewater treatment can enhance the cohesion of activated sludge by physicochemical reaction In addition, the present invention relates to a high efficiency biological wastewater treatment system which provides a high treatment effect of organic matter and simplifies the structure of the treatment system, and a high efficiency wastewater treatment method using the system.

Description

The method and Apparatus of Biological High Efficiency Wastewater Treatment Using the Contacting Media for Activated Sludge}

The present invention provides a highly efficient biological wastewater treatment system using microorganisms, which not only provides a surface for the settlement of microorganisms but also promotes the proliferation of microorganisms to activate biodegradation and to help floc formation of microorganisms. The present invention relates to a high-efficiency biological wastewater treatment system using a carrier and a high-efficiency wastewater treatment method using the same. Specifically, the present invention provides an environment and a trace element necessary for the growth of microorganisms, thereby promoting the generation of activated sludge floc and decomposing organic matter, and By using active sludge contact carrier for organic wastewater treatment, which can enhance the cohesiveness of activated sludge by reaction, high efficiency biological wastewater advanced treatment system and its system which give high treatment effect and simplify the structure of treatment system. Used organic Wastewater relates to a highly efficient treatment method.

In general, the treatment of sewage with high organic matter content, such as food industry such as canning and beverage manufacturing, livestock wastewater and domestic sewage, is mostly dependent on biological treatment using organic matter degradability of aerobic microorganisms. A separate microbial agent is also used for the purpose of the treatment process of a general biological wastewater treatment system.

First, the sewage from which contaminants have been removed by going through the settling screen tank and the flow adjustment tank is introduced into the aeration tank where the MLSS (Mixed Liquor Suspended Solid) of the aerobic microorganism is constantly maintained.In the aeration tank where a certain amount of oxygen is continuously aerated, the organic matter in the sewage is activated. On the other hand, it is decomposed and removed by using a group of aerobic microorganisms called as an energy source for microbial metabolism and proliferation.In this way, microorganisms propagated using organic matter as sewage are precipitated in the sedimentation tank, some are removed, and some are aeration tanks. It is returned and used to keep the MLSS of the microorganism constant.

Thus, the treated water of sewage, in which the organic matter is significantly reduced in the aeration tank and the sedimentation tank, is discharged through the sewage pipe or, in some cases, transferred for disinfection and the like.

However, the conventional organic wastewater treatment method has a disadvantage in that a long contact time of at least 6 to 8 hours is required to decompose, ferment and oxidize organic materials by microorganisms. In case of use, some efficiency increase can be expected, but the effect is only limited to the organic treatment function in the aeration tank.

On the other hand, as the economy of Korea improves and the industry develops rapidly, environmental pollution is rapidly progressing, causing problems such as damage to the water quality environment.As a result, the government has established water conservation measures and designated special water treatment areas for watersheds. The government's policy strictly restricts the discharge standard of organic materials for wastewater treatment facilities in the area. As such, the strict discharge water quality standards in special countermeasures areas become strict, and the existing biological treatment systems have such strict discharge water quality standards. Often, situations that do not satisfy the situation have occurred.

Therefore, it can be said that the existing wastewater treatment facility needs to install a new facility for the advanced treatment in addition to the general biological treatment system.

Currently, the advanced treatment system of organic wastewater, which is widely used, is mainly used to treat the secondary treatment facility after the biological treatment. Examples include a method of performing coagulation and filtration after biological treatment with activated sludge, a method of performing biofilm filtration after biological treatment with activated sludge, a method of performing ozone (O ₃ ) treatment after biological treatment with activated sludge, and the like. For example.

However, these methods have some advantages in terms of processing efficiency, but most of them are difficult to operate and manage, and have a problem of increase in construction cost and operation cost due to an increase in additional facilities.

Below is a brief look at the typical of the wastewater advanced treatment methods used in the prior art.

First, "Active sludge + flocculation + filtration" is the most commonly used method of advanced treatment of wastewater. After performing the first biological treatment, the reactor, the flocculation tank and the second stage are used to remove untreated organic matter. Chemical flocculation is carried out in the sedimentation bath, which is subjected to a third filtration tank to lower the SS of the effluent again.

Such "activated sludge + flocculation + filtration" method is excellent in terms of treated water quality and water stability, but the process is complicated and the investment cost for constructing treatment facilities is very expensive, and coagulant and coagulant aid for chemical treatment are added. The maintenance cost is high, and the operation conditions are complicated because the filtration tank needs to be backwashed periodically, and it is difficult to operate and manage without specialized knowledge.

In the "Active sludge + biofilm filtration method", after performing the first biological treatment through the flow adjusting tank, the aeration tank, and the first settling tank, the first treated water is passed through the biofilm filtration tank and the second settling tank to treat untreated organic matter. As a result, the biological treatment is performed once more to lower the organic content of the effluent.

However, such "activated sludge + biofilm filtration" uses a biological treatment method for both the primary treatment and the secondary treatment, so it is very sensitive to environmental changes and the stability of the treatment effect is poor. In addition, in terms of maintenance, it is known that there are many operational difficulties because the phenomenon of closing of the biofilm filtration tank is likely to occur.

In the "Active sludge + ozone (O ₃ ) method", after performing the first biological treatment through the flow adjusting tank, the aeration tank, and the first settling tank, ozone is secondarily applied to the first treated water to remove untreated organic matter. In the contact tank, the oxidation of ozone (O ₃ ), which is a strong oxidizing agent, is performed to lower the organic content of the effluent.

In order to facilitate oxidative decomposition by ozone (O ₃ ) in the "active sludge + ozone (O ₃ ) method", SS of the influent must be removed first. Since the original oxidizing power is a strong toxic substance, the activated carbon adsorption tank is installed at the rear end for adsorption of residual ozone.

"Activated sludge + ozone (O ₃₎ method" is one excellent in the quality of the treated water and processing stability, a large power is required for the ozone generation can be as great a risk of leakage of ozone to the downside.

Taking the "active sludge + biofilm filtration" which is the most commonly used among the above advanced biological treatment methods, the configuration and function of the general organic wastewater biological advanced treatment system are as follows.

As shown in FIG. 1, even in the "active sludge + biofilm filtration method", the filthy water firstly removes bulky floating contaminants and heavy dirt while passing through the immersion screen tank 10.

The sewage from which the contaminants are removed is introduced into the aeration tank 30 through which the MLSS is constantly maintained through the flow control tank 20 for maintaining a constant load of the aeration tank 30.

Organic substances in the sewage introduced into the aeration tank 30 are decomposed by the microorganisms present in the aeration tank 30, some of them are made into components for the growth of the microorganisms and discarded when the sludge is drawn, and some of them are gasified while being used as an energy source of the microorganisms. In order to make aerobic microbial environment underwater, oxygen is aerated in aeration tank 30 by various methods such as an acid engine.

The sewage from which the organic matter is removed by the activated sludge microorganism in the aeration tank 30 is introduced into the settling tank 40 containing a portion of the activated sludge, and the introduced activated sludge forms a floc and settles. Some of the sediment is returned to a kind of microbial inoculum to keep the MLSS of the aeration tank 30 constant and the remainder is drawn to the waste sludge.

The drawn waste sludge is treated by individual anaerobic treatment and the like, and the treated water of sewage, which is significantly reduced in organic matter in the aeration tank 30 and the sedimentation tank 40, is introduced into the Biological Aerated Filter (BAF) 60 and filtered. The biofilm formed on the surface is once again subjected to biological treatment.

The treated water in this way is passed through a backwash tank (70) to store the treated water for backwashing to prevent clogging of the media voids in the biofilm filtration tank (60), and then discharged through sewage pipes or It is transported for further processing such as filtration and disinfection.

As described above, the "active sludge + biofilm filtration method", as described above, is very sensitive to environmental changes, the stability of the treatment effect is inferior, and the operation of the biofilm filtration tank 60 is likely to occur. It has the disadvantage of requiring additional equipment.

The problems of the general advanced processing methods as described above are as follows.

First, the treatment process is divided into primary treatment and secondary treatment, which is very complicated.

Second, this complicated process requires a high degree of expertise in operation and management.

Third, the initial construction cost is very high as the process is complicated.

Fourth, maintenance costs for the use of chemicals such as flocculants, coagulant aids, and power consumption for ozone generation are very high.

Fifth, it is easy to cause instability of treated water quality due to environmental changes and inexperienced operation management.

On the other hand, there is a biological treatment method using an activated sludge carrier as a method to increase the efficiency of the biological treatment method of the organic wastewater as described above to obtain a certain degree of advanced treatment effect without installing the above advanced treatment system. The explanation is as follows.

In the case of wastewater treatment using activated sludge carriers, the first removal of contaminants by going through the settling screen tank and the flow adjustment tank is the same as the general biological wastewater treatment method, but the microorganisms that decompose organic matter in the sewage in the aeration tank are suspended in the wastewater as in the usual method. Rather than being in the form of a biofilm on the surface of the carrier having a suitable surface area and floating characteristics.

In the case of forming a biofilm using a carrier as described above, the amount of sludge generated is small, sludge conveyance is unnecessary, and the MLSS of the aeration tank can be maintained at a high concentration, so it is more adaptable to fluctuations in organic matter load of sewage and the size of the reactor can be reduced. Has the advantage of being economic.

In addition, when the organic film is removed from the sewage by forming a biofilm using a carrier, it is possible to remove some of the hardly decomposable substances and nitrogen compounds present in the sewage. This is because most of the washing out due to the slow speed becomes possible to grow in the reaction tank by growing on the carrier.

However, biological treatment using a carrier, in addition to the above-mentioned advantages, such as the problem of detachment of the immobilized microorganisms in the carrier, the difficulty in removing the suspended suspension material and the problem of frequent clogging of the pores between carriers, There are other problems.

As such, the methods of using the carrier will be described in the patent according to their type.

First, as a focus on improving the function as a general microbial carrier, a porous carrier made of a ceramic material was disclosed in Korean Patent Publication No. 2000-10218, and a cotton derived from hydrophilic fiber in Korean Patent Publication No. 1000-188805. The carrier has been disclosed, and the Republic of Korea Patent Publication No. 1999-46394 discloses a carrier consisting of activated carbon captured in a metal or plastic cartridge.

However, these conventional patent carriers are merely a certain improvement in the function of the microbial carrier used in the aeration tank, and do not have any additional functions other than the function of slightly improving the biological treatment efficiency. Its limitations are that it is not wide and does not simplify existing processing systems or bring economic savings.

As a patented method for adding another advantageous function in addition to improving the function as a general carrier as described above, the Republic of Korea Patent Publication No. 2000-33238, in addition to the carrier function to give a function to further prevent the external leakage of nitric oxide, etc. Biological wastewater treatment system using a semi-floating carrier structure to move up and down in accordance with the flow rate has been disclosed, and Korean Patent Publication No. 1999-230522 has added calcium as a buffer to adjust the pH of the carrier function -A siliceous porous carrier has been disclosed, and Korean Patent Publication No. 1998-73766 discloses a carrier made of a soil-derived material to provide a habitat suitable for soil bacteria, and Korean Patent Publication No. 2000-37151 It can have emulsifying ability by fusing microbial agent and soap component. It is disclosed for a production carrier.

However, none of these patented methods also has the effect of promoting sedimentation by promoting microbial growth to activate biodegradation or promoting floc formation of activated sludge, so that the advanced biological wastewater treatment system There has been a limit to the scope of application.

Accordingly, not only provides a surface for the settlement of microorganisms, but also promotes proliferation by activating the biodegradation by promoting the proliferation of the microorganisms, and promotes floc formation by increasing the adhesion of activated sludge, which can increase sedimentation. Activated sludge carriers and a high efficiency biological wastewater treatment system using the same can be said.

The present invention is to solve the above problems of the prior art and to accommodate such demands required for the aeration tank carrier, the ultimate object of which not only provides a surface for the settlement of microorganisms but also promotes their proliferation. High-efficiency organic wastewater treatment system using activated sludge carriers that can increase the sedimentation in the sedimentation tank by activating biological organic decomposition and promoting floc formation by increasing the adhesion of activated sludge, and highly efficient wastewater treatment using the system To provide a way.

To this end, the present invention provides a sedimentation screen tank for removing contaminants in the sewage, a flow adjusting tank for maintaining a constant flow rate of the sewage flowing into the aeration tank, an aeration tank for biologically decomposing organic matter in the sewage using activated sludge microorganisms, and an aeration tank Sludge in the treated water flowing out from the sediment is sedimented into the waste sludge and part of the sludge returned to the sludge return pipe of the general biological treatment system consisting of a settling tank for returning to the aeration tank as microbial inoculum, the activity for reacting the sludge and activated sludge carrier It provides a high efficiency biological wastewater treatment system, characterized in that provided via a sludge carrier reaction tank, and a biological high efficiency wastewater treatment method using the same.

1 is a process diagram schematically showing a typical biological wastewater treatment system.

Figure 2 is a process diagram schematically showing a biological high efficiency wastewater treatment system according to the present invention.

Figure 3 is a process diagram schematically showing another biological high efficiency wastewater treatment system according to the present invention.

[Description of Symbols for Main Parts of Drawing]

10: immersion screen tank 20: flow rate adjustment tank

30: aeration tank 31: contact tank

40: sedimentation tank 50: K2-M reactor

60: biofilm filtration tank 70: backwash tank

P: Pump B: Blower

The present invention provides a high efficiency biological wastewater treatment system using microorganisms, which not only provides a surface for the settlement of microorganisms but also promotes their proliferation to activate the decomposition of biological organic matter and promotes floc formation by increasing the adhesion of activated sludge. The present invention relates to a highly efficient treatment system for organic wastewater using an activated sludge carrier capable of increasing the sedimentation property in and to a method for treating organic wastewater with high efficiency using the system.

Specifically, the present invention provides a highly active organic sludge contact carrier for organic wastewater, which contains a trace element, i.e., a mineral component, to promote the generation of activated sludge floc and to decompose organic matter and to enhance the cohesion of activated sludge by physicochemical reaction. The present invention relates to a biologically efficient organic wastewater treatment system in which the treatment efficiency is maximized and the structure of the treatment system is simplified, and a method for treating organic wastewater with high efficiency using the system.

The carrier used in the method and system of the present invention has already been disclosed by the applicant in Korean Patent No. 0269511, and the applicant has a pH of 4.5 to 5.5 and a component composition ratio of SiO ₂ : 45 to 55 weight of the dissolved aqueous solution. %, Al ₂ O ₃ : 25-30% by weight, Fe ₂ O ₃ : 10-15% by weight and red-yellow loess having a specific surface area of 20 m ² / g or more, boron (B): 0.3-0.5% by weight, sodium chloride ( NaCl): 0.5 to 0.6% by weight, magnesium sulfate (MgSO ₄ ): 0.2 to 0.3% by weight and Agar: 0.5 to 0.6% by weight of the ocher mixture prepared by mixing 40-60% by weight, soluble foreign matter is removed The activated sludge contact carrier was prepared by mixing 4-6% by weight of powdered activated carbon, 30-50% by weight of powdered rock, and 4-6% by weight of open soil.

Such a carrier for use in the present invention, that is, K2-M, has a pH of 4.5 to 5.5 of the dissolved aqueous solution, and a component composition ratio of SiO ₂ : 45 to 55%, Al ₂ O ₃ : 25 to 30%, Fe ₂ O ₃ : 10 Red yellow ocher having a specific surface area of ~ 15% and a specific surface area of 20 m ² / g or more is processed into a granular state of about 80 to 100 mesh and placed in an automatic mixer, which is boron (B): 0.3 to 0.5% and sodium chloride (NaCl): 0.5 to 0.6 %, Magnesium sulfate (MgSO ₄ ): 0.2 to 0.3% and agar (Agar): 0.5 to 0.6% of the first compounding step of a balanced formulation; Water is added to the formulation to the water content of about 20% to stabilize the temperature for 72 hours in a state of maintaining the temperature at 30 ~ 35 ℃, and then dried in a natural state to process into a particle of about 80 ~ 100 mesh ; 40 to 60% by weight of the yellow clay thus prepared was contacted with a sulfuric acid solution at a concentration of 5 to 10% for at least 2 hours to remove soluble foreign substances. A second compounding step of blending 30 to 50% by weight of powdered ganguerite and 4 to 6% by weight of open soil; And 5-10% of the liquid coagulant is added thereto, stirred with water, cut into constant diameters and lengths, and dried to prepare a final method of manufacturing a tablet.

K2-M prepared as described above is inhabited by a variety of microorganisms naturally, and thus contains a large amount of enzymes having various functions such as catalase, diphenol oxidase, saccharase, and protease.

The present inventors have developed an advanced organic wastewater treatment system using the carrier K2-M having the above characteristics, and an advanced treatment method of organic wastewater using the system, and named it the B.M.S (Bio-Mineral System) method.

Such B.M.S. In the system of the present invention according to the method, a facility for attaching or supporting microorganisms to the carrier by reacting the microorganisms with the activated sludge carrier in a general biological treatment system is additionally installed, but its size is small and the installation method is also simple in the conveying sludge pipeline. Since it is possible to intervene, the installation cost is low and it can be easily applied to an existing facility.

BMS (Bio-Mineral System) method and the system according to the present invention in response to the deepening of environmental pollution due to population growth and high industrial growth and strengthening the effluent water quality standards, the treatment to the extent that no more advanced treatment is required except for a special purpose. It is a practical and economical system that has been developed to have a high efficiency and simple process facility configuration and not to be difficult to operate.

Hereinafter, the present invention will be described in detail with reference to Examples and Test Examples, but the present invention is not intended to be limited thereto.

Example 1

According to the present invention, a general embodiment of a high efficiency organic wastewater treatment system using K2-M and a high efficiency organic wastewater treatment method using the system will be described with reference to FIG. 2.

As shown in FIG. 2, in the system of the present invention, the raw sewage water introduced into the system is first introduced into the aeration tank 30 through the flow adjustment tank 20 after the contaminants are removed while passing through the sedimentation screen tank 10.

The organic matter in the sewage introduced into the aeration tank 30 is decomposed and removed by being used as an energy source for microbial metabolism and proliferation by the activated sludge microbial community. In the system of the present invention, the organic matter decomposing microorganism is a carrier for supporting microorganisms, that is, K2. Carry out microbial degradation in -M.

At this time, K2-M provides natural minerals to increase the activity of organic matter-decomposing microorganisms by reacting with sewage, and because the size thereof is very fine, bulky activated sludge of general large volume ceramic, plastic or activated carbon materials Unlike the carrier, it acts as a coagulation nucleus to induce floc formation, thereby greatly improving the concentration of microorganisms in the aeration tank 30 and at the same time increasing the sludge sedimentation ability to form a highly compact aggregated sludge in the precipitation tank 40.

Such K2-M is introduced into the aeration tank 30 through the K2-M reaction tank 50, the K2-M reaction tank 50 of the sludge conveying pipe conveying the conveying sludge from the settling tank 40 to the aeration tank 30. Located in between, the activated sludge microorganism of the sludge to be returned and the carrier, that is, K2-M is reacted to serve to attach or support the microorganism to the carrier.

K2-M reactor 50 of the present system, unlike other facilities such as aeration tank (30), sedimentation tank (40) reacts the carrier with a small flow rate of sludge and does not require a large volume, the reaction time is also very short Therefore, it can be said that there is little burden in terms of facility cost and processing capacity of the system.

In addition, the K2-M reaction tank 50 of the present system can be easily installed in the middle of the conveying sludge pipe leading from the settling tank 40 to the aeration tank 30, the advantage that it can be easily applied to existing general biological treatment facilities Have.

On the other hand, in the aeration tank 30 of the system of the present invention alternates between aeration and non-aeration at intervals of about 30 minutes, which is for selective cultivation of random bacteria with strong degradability of organic matter, in the case of using random microorganisms in terms of treatment efficiency compared to aerobic treatment. Does not have a big advantage, but it adapts to environmental changes better than aerobic microorganisms, so there is no problem such as sludge bulking, and it is possible to easily maintain a good aeration tank 30 state simply by simply operating the aeration device intermittently. The operation management of the facility is also easy.

Sewage from which the organic matter is removed by the random bacteria in the aeration tank 30 is introduced into the settling tank 40 containing a portion of the activated sludge as in the general treatment method, and the introduced activated sludge is settled to form flocs. Some of the precipitates precipitated are attached to the carrier by reacting with K2-M through the K2-M reactor (50), and then returned to a kind of microbial inoculum to keep the MLSS of the aeration tank constant, and the remainder is drawn to the waste sludge. do.

The treated water of sewage, in which the organic matter is significantly reduced in the aeration tank 30 and the sedimentation tank 40, is discharged through the sewage pipe as in the general biological treatment method, or sometimes transferred for further advanced treatment such as disinfection.

Example 2

Meanwhile, according to the present invention, the highly efficient organic wastewater treatment system using K2-M and the highly efficient organic wastewater treatment method using the system may be implemented in other forms. Hereinafter, the highly efficient organic wastewater treatment system using K2-M according to the present invention. And another embodiment of a high-efficiency organic wastewater treatment method using the system with reference to Figure 3 as follows.

As shown in FIG. 3, in this embodiment, filthy water introduced into the system is first introduced into the aeration tank via the flow adjusting tank 20 after the contaminants are removed while passing through the immersion screen tank 10. Same as the case.

However, in the present embodiment, unlike the first embodiment, the aeration tank into which the filthy water flowing through the flow adjustment tank is introduced is divided into two, a contact tank 31 and an aeration tank 30 '.

The contact tank 31 is a place where the activated sludge carrier K2-M used in the present invention is introduced, where the organic matter in the sewage and the activated sludge microorganism in the carrier are contacted for a short residence time. Is attached to the activated sludge in the carrier to be introduced into the next aeration tank (30 ').

In the aeration tank 30 ′, sewage is retained for a relatively long time, and the organic matter attached to the activated sludge in the carrier during the residence time undergoes decomposition by microorganisms.

As such, the aeration tank is divided into the contact tank 31 and the aeration tank 30 'by first contacting and attaching organic substances and microorganisms in the contact tank 31, and then oxidizing the aeration tank 30' to reduce the overall reaction time. It is possible to improve the treatment efficiency of the effluent and to better cope with the variation of the organic load of the incoming effluent.

In this embodiment, K2-M is introduced into the contact tank 31 via the K2-M reaction tank 50 located between the conveying pipe conveying the conveying sludge from the settling tank 40 to the contact tank 31, K2 As in Example 1, the -M reaction tank 50 reacts the activated sludge microorganisms of the sludge with the carrier, that is, K2-M, to attach or support the microorganisms to the carrier.

On the other hand, in the contact tank 31 and the aeration tank 30 'of this embodiment, the selective culture of the random bacteria is induced by alternating aeration and non-aeration at intervals of about 30 minutes.

The sewage from which the organic matter is removed by the random bacteria in the aeration tank 30 'is introduced into the settling tank 40 containing a part of the activated sludge as in the general treatment method, and the introduced activated sludge forms a floc and settles. Some of the sediment thus precipitated is returned to a kind of microbial inoculum to maintain a constant MLSS of the aeration tank 30 'and the remainder is drawn and disposed of as waste sludge.

Sewage treated water in which the organic matter is significantly reduced in the aeration tank 30 ′ and the settling tank 40 is discharged through the sewage pipe as in the general biological treatment method, or sometimes transferred for further treatment such as disinfection.

[Test Example]

A system according to Example 2 of the present invention was prepared, and the effect test on the wastewater treatment efficiency was conducted using a conventional general biological wastewater treatment system as a comparative example.

The test was performed using a system installed in a general biological treatment system via a K2-M reactor in a return sludge pipe line according to the present invention. The general system operating conditions used in the test are shown in Table 1 below. It was investigated by measuring the SV ₃₀ , BOD and SS of the treated sewage, and the results measured with different aeration conditions to determine the proper operating conditions of the system of the present invention are shown in Table 2 below. Here, SV ₃₀ is the aeration liquid of the aeration tank in the 1000ml mass cylinder and settled for 30 minutes, when the solid-liquid separation, the height of the sediment relative to the total height is quantified in%, the lower the value is the sedimentability is high and dense precipitate It can be said that formed.

System operating condition Driving conditions Contents Remarks Average Inflow BOD (ppm) 281.6 Average Inflow SS (ppm) 214.0 Average Inflow Flow (㎥ / day) 5.22 BOD volume load (㎏ / ㎥day) 0.2-0.7 Average: 0.465 Raw water discharge time 12hr 08: 00-20: 00 Raw water injection time 12hr 08: 00-20: 00 Sludge Return 1 ~ 2Q 24hr continuous SRT (day) 30

Water Quality Changes According to Aeration Conditions by Hours Aeration conditions Processing status BOD (mg / L) SS (mg / L) Continuous Aeration Sludge Non-drawn -. Water quality deteriorates sharply 68.3 38.0 30 minutes Aeration 30 minutes Stop sludge Non-drawn -. Treated water quality is not continuously improved. Continuous increase above MLSS 6000ppm. SV ₃₀ worse than 70% 47.5 29.5 30 minutes Aeration 30 minutes Stop sludge drawing -. Stabilized to less than 20ppm of treated water. MLSS keeps around 5500ppm. SV ₃₀ improved below 60% 15.7 9.9

In view of the results shown in Table 2, it was found that the system of the present invention exhibits high treatment efficiency of organic wastewater at a high treatment level under conditions in which aeration and non-aeration are applied to fix random microorganisms and draw sludge.

As described above, the present invention can provide a highly efficient wastewater treatment system and a highly efficient wastewater treatment method using the system, which can greatly improve the treatment efficiency of organic matter in sewage, but have a very simple structure.

Specifically, according to the present invention, by selectively cultivating a random bacteria by alternately applying aeration / non-aeration, the treatment safety of the treatment system is greatly improved, but the construction method is very simple, the installation cost of the facility is low and the existing general biological treatment A biological high efficiency wastewater treatment system which can be easily applied to a facility and easy operation management of the facility and a high efficiency wastewater elevation method using the system can be provided.

Claims (12)

In the biological high efficiency wastewater treatment system, Sedimentation screen tank 10 for removing impurities in the sewage; A flow rate adjustment tank 20 for maintaining a constant flow rate of filthy water flowing into the aeration tank 30; An aeration tank 30 for biologically decomposing organic matter in sewage using activated sludge microorganisms supported on the activated sludge carrier; A settling tank 40 for sedimenting sludge in the treated water flowing out of the aeration tank 30 to draw some waste sludge and returning the sludge to the aeration tank 30; And Characterized in that it comprises an activated sludge carrier reaction tank 50 for reacting the sludge conveyed from the precipitation tank 40 to the aeration tank 30 and the activated sludge carrier, Biological high efficiency wastewater treatment system. The method of claim 1, The activated sludge carrier has a pH of 4.5 to 5.5 and a component composition ratio of 45 to 55% by weight of SiO ₂ , 25 to 30% by weight of Al ₂ O ₃ , and 10 to 15% by weight of Fe ₂ O _3. Boron (B): 0.3 to 0.5% by weight, sodium chloride (NaCl): 0.5 to 0.6% by weight, magnesium sulfate (MgSO ₄ ): 0.2 to 0.3% by weight, and agar (Agar) in red yellow loess having a specific surface area of 20 m ² / g or more. ): 40 to 60% by weight of the ocher mixture prepared by mixing 0.5 to 0.6% by weight, 4 to 6% by weight of powdered activated charcoal, soluble foreign matters removed, 30 to 50% by weight of powdered rock, and 4 to 6% by weight of soil A biologically high efficiency wastewater treatment system, characterized in that it is prepared by powdering or tableting by mixing%. The method of claim 1, The activated sludge carrier reaction tank 50 is characterized in that it is provided in the sludge conveying pipe connected to the aeration tank 30 from the settling tank 40, Biological high efficiency wastewater treatment system. In the biological high efficiency wastewater treatment system, Sedimentation screen tank 10 for removing impurities in the sewage; A flow rate adjustment tank 20 for maintaining a constant flow rate of filthy water flowing into the contact tank 31; A contact tank 31 for contacting the activated sludge microorganisms supported on the activated sludge carrier with the organic matter in the sewage; An aeration tank 30 'for biologically decomposing organic matter in sewage using the activated sludge microorganisms supported on the activated sludge carrier; A sedimentation tank 40 for sedimenting sludge in the treated water flowing out of the aeration tank 30 'and drawing some into the waste sludge and returning the sludge to the contact tank 31; And Characterized in that it comprises an active sludge carrier reaction tank 50 for reacting the sludge and the sludge returned to the contact tank 31 from the settling tank 40, Biological high efficiency wastewater treatment system. The method of claim 4, wherein The activated sludge carrier has a pH of 4.5 to 5.5 and a component composition ratio of 45 to 55% by weight of SiO ₂ , 25 to 30% by weight of Al ₂ O ₃ , and 10 to 15% by weight of Fe ₂ O _3. Boron (B): 0.3 to 0.5% by weight, sodium chloride (NaCl): 0.5 to 0.6% by weight, magnesium sulfate (MgSO ₄ ): 0.2 to 0.3% by weight, and agar (Agar) in red yellow loess having a specific surface area of 20 m ² / g or more. ): 40 to 60% by weight of the ocher mixture prepared by mixing 0.5 to 0.6% by weight, 4 to 6% by weight of powdered activated charcoal, soluble foreign matters removed, 30 to 50% by weight of powdered rock, and 4 to 6% by weight of soil A high efficiency biological wastewater treatment system, characterized in that it is prepared by mixing or powdering by mixing%. The method of claim 4, wherein Activated sludge carrier reaction tank 50 is characterized in that it is provided in the sludge conveying pipe connected from the settling tank 40 to the contact tank 31, Biological high efficiency wastewater treatment system. In the biological high efficiency wastewater treatment method, A settling screen step for removing sewage from the sewage; A flow rate adjusting step for maintaining a constant flow rate of the sewage from which the contaminants have been removed in the sedimentation screen stage into the aeration stage; An aeration step for biologically degrading organic matter in sewage using the activated sludge microorganisms supported on the activated sludge carrier; A settling step for sedimenting and drawing sludge in the treated water flowing out in the aeration step; A sludge conveying step for conveying some of the sludge sedimented in the precipitation step to the aeration step; And Interposed in the middle of the sludge conveying step, characterized in that it comprises an active sludge carrier reaction step for reacting the sludge to be returned and the activated sludge carrier, Biological high efficiency wastewater treatment method. The method of claim 7, wherein The activated sludge carrier has a pH of 4.5 to 5.5 and a component composition ratio of 45 to 55% by weight of SiO ₂ , 25 to 30% by weight of Al ₂ O ₃ , and 10 to 15% by weight of Fe ₂ O _3. Boron (B): 0.3 to 0.5% by weight, sodium chloride (NaCl): 0.5 to 0.6% by weight, magnesium sulfate (MgSO ₄ ): 0.2 to 0.3% by weight, and agar (Agar) in red yellow loess having a specific surface area of 20 m ² / g or more. ): 40 to 60% by weight of the ocher mixture prepared by mixing 0.5 to 0.6% by weight, 4 to 6% by weight of powdered activated charcoal, soluble foreign matters removed, 30 to 50% by weight of powdered rock, and 4 to 6% by weight of soil A method for treating wastewater with high biological efficiency, characterized in that it is prepared by mixing or powdering by mixing%. The method of claim 7, wherein In the aeration stage, the aeration and non-aeration conditions are alternately applied to cultivate random bacteria as activated sludge microorganisms, Biological high efficiency wastewater treatment method. In the biological high efficiency wastewater treatment method, A settling screen step for removing sewage from the sewage; A flow rate adjusting step for maintaining a constant flow rate of the sewage from which the contaminants have been removed in the immersion screen step into the contacting step; A contact step for contacting the activated sludge microorganisms supported on the activated sludge carrier with the organic matter in the wastewater; An aeration step for biologically degrading organic matter in sewage using the activated sludge microorganisms supported on the activated sludge carrier; A settling step for sedimenting and drawing sludge in the treated water flowing out in the aeration step; A sludge conveying step for conveying a portion of the sludge settled in the precipitation step to a contacting step; And Interposed in the middle of the sludge conveying step, characterized in that it comprises an active sludge carrier reaction step for reacting the sludge to be returned and the activated sludge carrier, Biological high efficiency wastewater treatment method. The method of claim 10, The activated sludge carrier has a pH of 4.5 to 5.5 and a component composition ratio of 45 to 55% by weight of SiO ₂ , 25 to 30% by weight of Al ₂ O ₃ , and 10 to 15% by weight of Fe ₂ O _3. Boron (B): 0.3 to 0.5% by weight, sodium chloride (NaCl): 0.5 to 0.6% by weight, magnesium sulfate (MgSO ₄ ): 0.2 to 0.3% by weight, and agar (Agar) in red yellow loess having a specific surface area of 20 m ² / g or more. ): 40 to 60% by weight of the ocher mixture prepared by mixing 0.5 to 0.6% by weight, 4 to 6% by weight of powdered activated charcoal, soluble foreign matters removed, 30 to 50% by weight of powdered rock, and 4 to 6% by weight of soil A method for treating wastewater with high biological efficiency, characterized in that it is prepared by mixing or powdering by mixing%. The method of claim 10, In the aeration stage, the aeration and non-aeration conditions are alternately applied to cultivate random bacteria as activated sludge microorganisms, Biological high efficiency wastewater treatment method.