KR20020011359A - Combination purifier tank - Google Patents

Abstract

PURPOSE: A combined wastewater/sewage treatment equipment is provided which effectively removes non-degradable organic pollutants including high concentrated organic materials, nitrogen and phosphorus contained in sewage and wastewater and has stable treatment capacities by connecting an aerobic fluidization tank and an aerobic contact tank in series. CONSTITUTION: In a combined wastewater/sewage treatment equipment in which an anaerobic sedimentation tank(3), an aerobic fluidization tank(4), an aerobic contact tank(5) and a clarifier(6) are sequentially formed between an inlet(1) into which sewage and wastewater are introduced and an outlet(2) through which purified sewage and wastewater are discharged, the combined wastewater/sewage treatment equipment comprises a baffle(11) which is installed in the aerobic fluidization tank(4); an air diffuser(12) for diffusing air which is arranged at the lower part between a separation plate(3a) between the aerobic fluidization tank(4) and the anaerobic sedimentation tank(3) and the baffle(11), and which is connected to an oxygen supplier(13); a suspending media(14) which is circulated in the aerobic fluidization tank(4); a fixed media(15) which is arranged in the central part of the aerobic contact tank(5); and an air diffuser(16) for diffusing air which is arranged between a separation plate(4a) between aerobic contact tank(5) and the aerobic fluidization tank(4) and the side surface of the fixed media(15), and which is connected to an oxygen supplier(13), wherein the suspending media(14) consists of a capsule made of a synthetic material on the surface of which a plurality of holes are formed, and which captures granular materials, a fixed filling material which is captured in the inner space of the capsule so as to be formed into a granular activated carbon that solidifies activated microorganisms, and a multifunctional filling material controlling an entire specific gravity.

Description

Combined Purification System for Sewage and Wastewater Treatment {COMBINATION PURIFIER TANK}

The present invention relates to a combined purification device that decomposes contaminants such as BOD and COD of manure and domestic sewage generated in the workplaces of general homes and restaurants, and in particular, microorganisms (active sludge) are immobilized on a fluid carrier to accumulate culture. It is a structure that connects aerobic flow tank and aerobic contact tank by high concentration of active microorganism in series, and it has high removal efficiency of high degradable organic pollutants including nitrogen, phosphorus The present invention relates to a combined purification apparatus for treating sewage and wastewater.

In conventional sewage treatment facilities, septic tank facilities are generally anaerobic and aerobic catalytic cracking treatment methods. The treatment method is a first treatment to decompose the treated materials using sedimentation and anaerobic microorganisms, and in the second aerobic state. A septic tank using a lot of catalytic oxidation using a stationary phase carrier was used.

The septic tank as described above shows a general treatment capacity for low concentration sewage treatment. Currently, septic tank has a problem in that it cannot be easily treated because sewage at the workplace or the like contains hardly decomposable concentrations.

In addition, carriers used in combined septic tanks have been developed and marketed for various types of fixed bed or fluidized bed systems. However, due to structural defects, carriers have difficulty in management in terms of mass transfer and maintenance. .

In particular, it is difficult to maintain a high concentration of activated sludge in a contact tank for decomposing organic matter using aerobic microorganisms.

When looking at the fibrous carriers installed in the stationary phase, they are mainly the carriers in which microorganisms adhere to the fibers having a large specific surface area, but these carriers are characterized by the treatment of sewage, which is characterized by severe variation in time of generation of organic matter. Desorption is easy due to the physical force caused by shear stress, and the stress against load fluctuation is weak.

Currently, there are two main causes of the poor treatment efficiency of merged septic tanks: First, wastewater from living and business places contain hardly decomposable substances, and secondly, the variation of wastewater by concentration and generation time is very severe. to be.

The biotechnological method in the treatment of wastewater is to use the pollutants in the wastewater as substrates required for the metabolism of microorganisms, and it is very difficult to maintain the activity of microorganisms because the concentration and occurrence of wastewater are severe. to be.

In addition, the effects of the hardly decomposable organic substances show that the microorganisms having the ability to decompose the hardly decomposable substances are difficult to be immobilized in the septic tank contacted with a carrier which is easy to attach and detach the microorganisms because the microorganisms that decompose and ingest the hardly decomposable substances are extremely slow in growth. .

The present invention overcomes these problems of the prior art as described above, in order to achieve the object of the invention for treating wastewater with a stable and excellent treatment efficiency, a system that is resistant to severe load fluctuations, effective removal of nitrogen, detergents The present invention aims to effectively remove hardly decomposable substances and to remove high concentrations of organic contaminants.

That is, an object of the present invention is to introduce a treatment method using a high concentration of immobilized microorganisms in order to effectively remove organic substances and nitrogen phosphorus from the combined purification device, as well as a method for maintaining the concentration of the substance and oxygen transfer and proper microorganism immobilization. By using a carrier that can continuously maintain high activity, it is appropriately applied to a biotechnological treatment facility to provide a merger purifier that meets the situation of Korea and shows stable treatment efficiency.

In the present invention, a sedimentation anaerobic tank, aerobic flow tank, aerobic contact tank, and sedimentation tank are sequentially formed between an inlet for introducing sewage and wastewater and an outlet for purifying treated sewage and wastewater. In the aerobic flow tank, a baffle is installed, and an acid mechanism for injecting air from the lower portion between the diaphragm and the baffle between the aerobic flow tank and the settling anaerobic tank is arranged and connected to an oxygen supply, and the fluid carrier is circulated in the aerobic flow tank. In addition, the stationary carrier is disposed at the center of the aerobic contacting tank, and an air diffuser for injecting air between the side of the diaphragm and the fixed carrier between the aerobic contacting tank and the aerobic fluidizing tank is disposed to be connected to the oxygen supply device. Including, but the fluid carrier to form a plurality of holes on the surface and capture the particulate matter Provides a composite purification device for sewage and wastewater treatment consisting of a synthetic resin capsule, an immobilized filler formed of granular activated carbon trapped in the inner space of the capsule and immobilized active microorganisms, and a multifunctional filler that controls the specific gravity of the whole. do.

1 is a cross-sectional view of the combined purification device for wastewater treatment according to the present invention,

Figure 2 is a model of the aerobic flow tank of the combined purification apparatus according to the present invention,

3 is a model diagram of an aerobic contact tank of the combined purification apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

11: baffle

12, 16: acid diffuser

13 oxygen supply

14: flow counseling

15: fixed consultation

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

1 is a view showing a combined purification and purification apparatus for wastewater treatment according to the present invention, wherein a sedimentation anaerobic tank 3 is disposed between an inlet 1 for introducing sewage and wastewater and an outlet 2 for discharging purified sewage and wastewater. ), The aerobic flow tank (4), aerobic contact tank (5), the precipitation tank (6) will be formed sequentially.

And the present invention is a baffle (11) installed in the aerobic flow tank (4), the diaphragm (3a) between the aerobic flow tank (4) and sedimentation anaerobic tank (3) and the lower portion between the baffle (11) An air diffuser 12 disposed in the air supply unit, an oxygen supplier 13 for supplying air to the air diffuser 12, a fluid carrier 14 embedded in the aerobic flow tank 4, and the aerobic contacting tank 5 A fixed carrier 15 disposed at the center of the diaphragm, and a diaphragm 4a between the aerobic contacting tank 5 and the aerobic fluidizing tank 4 and a lower side between the side of the fixed carrier 15 and It consists of a diffuser (16) connected to the oxygen supply (13).

In particular, as shown in FIG. 4, the fluid carrier 14 is formed in a porous capsule 14a made of a synthetic resin material which traps particulate matter and traps granular material, and is formed in the interior space of the capsule 14a. It consists of an immobilized filler material 14b formed of granular activated carbon obtained by trapping and immobilizing active microorganisms, and a multifunctional filler material 14c for adjusting the specific gravity of the whole.

That is, according to the present invention, after the microorganism having a high concentration of substrate is purified and trapped in the micropore or mesopore of granular activated carbon, the immobilized filler 14b is prepared. The multifunctional filling material 14c together with the immobilizing filling material 14b is filled into the porous capsule 14a, and an aerobic contacting tank using the fully mixed aerobic fluid tank 4 and the fixed carrier 15 5) is connected in series.

As shown in FIG. 2, the air diffuser 12 is discharged from the lower portion between the diaphragm 3a and the baffle 11 upwards by injecting the compressed air of the oxygen supplier 13. The fluid carrier 14 is circulated smoothly in the aerobic fluid tank 4.

As shown in FIG. 3, the air diffuser 16 ascends from the lower portion between the diaphragm 4a and the fixed carrier 15 upwards from the air flowing out by spraying compressed air of the oxygen supplier 13. Thus, the sewage and wastewater in the aerobic contacting tank 5 are brought into smooth contact with the fixed carrier 15.

Of course, in the present invention, the circulating pump 7 is installed at the bottom of the settling tank 6 to return the sewage and wastewater submerged in the settling tank 6 to the settling cooper tank 3, as described above. It is obvious to place the anaerobic carrier 8 in (3).

At this time, the fixed carrier 15 used in the aerobic contacting tank 5 of the combined purification apparatus according to the present invention is the immobilized filling material 14b used in the fluid carrier 14 of the structure to capture the active microorganisms. The fluid carrier 14 used in the aerobic flow tank 4 using the filled material is mixed with a multifunctional filler 14c by immobilizing a filler (bioparticle ^TM ) 14b having a structure for trapping active microorganisms. Make.

Here, since the specific gravity of the immobilized filler material 14b is about 1.4, which is heavier than water, the aerobic fluid tank 4 specifically prepares a multifunctional filler material (bioball ^TM ) 14c to enable flow in a completely mixed state. It is mixed with the immobilized filling material (14b) in an appropriate ratio to form a fluid carrier (14).

Of course, the fixed carrier used in the aerobic contact tank 5 (also referred to as biocartridge ^TM ) will be described in a separate microbial culture apparatus in a porous capture body that is easy to install in a contact tank such as a cylinder, a rectangle, and an amorphous form. The microorganisms with excellent pollutant removal ability are cultured and filled with immobilized immobilization fillers (Bioparticles ^TM ), and the fluid carriers (Biocapsules ^TM ) used in the aerobic flow tank 4 have a spherical shape. The microorganisms used for the fixed carriers in the porous capsule 14a are immobilized immobilization material 14b (also called bioparticles ^TM ) and multifunctional fillers 14c for specific gravity control (also called bioballs ^TM ). ) Is manufactured by mixing and filling.

The capturing body and the capsule 14 may be made of plastics, iron materials, fiber materials, etc., but the fixed carrier 15 may be a PP fiber material of the sieve network, and the fluid carrier 14 may easily transfer materials and oxygen. The plastic material of one structure is preferable, and the fluid carrier 14 controls the filling ratio of the multifunctional filling material 14c, so that the specific gravity can be controlled, so that the fluid can flow well in the wastewater. Will be given.

The specific gravity of the multifunctional filler (14c) is 0.35-0.45, and its physical and chemical properties are very excellent, and the specific surface area is 1,500 n / g because the specific gravity of the activated carbon is used to make the carrier with the specific gravity. It is large, and it has a multifunctionality that can be immobilized as well as specific gravity control.

In addition, by adjusting the ratio of the multifunctional filler material (14c) according to the present invention can be adjusted at will, such as a carrier to be used in a completely mixed reactor, a carrier for a filling reactor, a carrier to be used in a floating reactor.

At this time, the specific gravity of the carrier required for each type of wastewater treatment system is as shown in Table 1 below, when making the carrier, the fluid carrier 14 used in the present invention controls the ratio of the multifunctional filler material. Thereby retaining the versatility available for all reactors.

Reactor type importance For fully mixed reactor 0.98-1.03 For filling reactors 1.20 or more For floating reactor 0.98 or less

The combined purification apparatus according to the present invention completely decomposes contaminants such as organic substances in a fully mixed reactor by using the fluid carrier 14 in the aerobic flow tank 4, and desorbs from the untreated organic substances and the fluidized bed. Suspended material containing the microorganisms is adsorbed and biologically treated in the aerobic contact tank (5) to completely clean the contaminants of the wastewater.

The fixed carrier 15 is filled with an immobilized filler material immobilized with microorganisms into a cylindrical shape that is easy to install with a fiber having a pore size of 10 mesh. The immobilized filler material 14b and the multifunctional filler material having the active microorganisms trapped inside the porous capsule 14a made of plastic material having a hole of 10 mesh size, 14c), the physical and chemical properties of the fluid carrier 14 is shown in Table 2 below.

number Analysis item Analysis unit One Wet density 1.01 g / cm ³ 2 Apparent density 1.20 g / cm ³ 3 diameter 4.5 cm 4 Microbial mass 35 g / EA

The combined purification apparatus as described above removes sediment and organic matter of sewage and wastewater from the settling anaerobic tank 3, and fixes the fixed carrier of the fluid carrier 14 and the aerobic contacting tank 5 of the aerobic flow tank 4. Purification treatment is easily performed using (15).

When treated materials such as sewage and waste water enter the sedimentation anaerobic tank (3) through the inlet (1), particulate matter precipitates, and the first anaerobic anaerobic microorganisms are attached to the anaerobic carrier (8). Decomposition takes place and the diaphragm 3a flows over and flows into the aerobic flow tank 4.

The contaminants of the workpieces introduced into the aerobic flow tank 4 are decomposed by the highly active microorganisms immobilized on the fluid carrier 14, and the nitrogen component is molecularly moved to the internal anaerobic region of the carrier for denitrification.

At this time, the necessary oxygen is supplied by the diffuser 12 and the oxygen supplier 13, and the flow of the fluid carrier 14 is assisted by the baffle 11, as shown in FIG. 4) flows into the model of a fully mixed bioreactor to facilitate the transfer of oxygen, active microorganisms and contaminants.

Here, the material to be treated for a certain time reaches the aerobic contact tank 5 beyond the diaphragm 4a constituted by the overflowware device of the structural type of the network of the structure in which the fluid carrier 14 cannot pass.

Here, the untreated residual contaminants and suspended substances are adsorbed and decomposed to the fixed and fixed carriers 15 which are activated and completely purified, and the purified to-be-processed object is disposed between the aerobic contacting tank 5 and the settling tank 6. The activated sludge, which is moved to the settling tank 6 through the diaphragm and is settled for a predetermined time, is returned to the settling tank 3 by the circulation pump 7 and the clean supernatant is discharged through the outlet 2.

In order to examine the performance of the combined purification apparatus according to the present invention, an experiment was conducted to treat restaurant sewage.

At this time, the treatment condition was maintained for 24 hours, and the test period was tested for about 3 months from 1999.4.1-June 30, 1999. The results of the continuous test are shown in Table 3, where the influent and the effluent were analyzed once daily, and the analysis method was analyzed according to the standard method.

Metric Influent Runoff Average removal efficiency Concentration Average Concentration Average BOD 450-800 650 8-13 10 98% CODcr 320-920 780 15-25 20 97% SS 30-280 150 6-10 8 95% TKN 20-60 36 4 or less 2 94%

As shown in the test results table of Table 3, BOD removal is very high even though the concentration of contaminants is very high such as BOD average 650mg / L, COD average 780mg / L, etc. The efficiency was very good with 98% BOD, 97% COD, 95% SS and 94% TKN.

The combined purification apparatus for continuous treatment in aerobic flow tank and aerobic contact tank according to the present invention can treat pollutants very effectively in sewage treatment to obtain very stable treated water quality, and is suitable for treating restaurant sewage in waterworks protected areas. In addition, when installed to treat domestic sewage in areas where sewage treatment is impossible, it provides an effect that greatly contributes to the preservation of the natural environment due to its excellent treatment ability.

Claims (1)

In the combined purification apparatus for treating sewage and wastewater by sequentially forming a sedimentation anaerobic tank, aerobic flow tank, aerobic contact tank, and sedimentation tank between an inlet for introducing sewage and wastewater and an outlet for purifying treated sewage and wastewater, A baffle is installed in the aerobic flow tank, and an acid mechanism for injecting air from the lower portion between the diaphragm and the baffle between the aerobic flow tank and the settling anaerobic tank is arranged to be connected to an oxygen supply, and the fluid carrier is circulated in the aerobic flow tank. In addition, the stationary carrier is disposed at the center of the aerobic contacting tank, and an air diffuser for injecting air between the side of the diaphragm and the fixed carrier between the aerobic contacting tank and the aerobic fluidizing tank is arranged to be connected to the oxygen supply. , The fluid carrier is formed of a synthetic resin capsule that traps granular material and forms a plurality of pores on the surface, an immobilized filler formed of granular activated carbon trapped in the inner space of the capsule to immobilize the active microorganism, and the specific gravity of the whole. Combined purification device for wastewater treatment consisting of multifunctional filling material to control the.