KR20090108187A - Pretreatment device of organic wastewater - Google Patents

Abstract

PURPOSE: A pre-processing device of organic wastewater is provided to increase process efficiency due to reduction of installation cost, and to reduce management cost. CONSTITUTION: A pre-processing device of organic wastewater includes the followings: a microorganism bio contactor connected with a reservoir and a pipe; a plurality of blades(16,22) installed at an inner side of the microorganism bio contactor while maintaining a constant interval; and a compressor installed at the pipe. The compressor supplies the air to a direction toward the microorganism bio contactor.

Description

Pretreatment device for organic waste water

The present invention relates to a pretreatment apparatus for organic wastewater, and more particularly, to a pretreatment apparatus for organic wastewater using a microbial bio-contactor capable of doubling the reaction efficiency by sufficiently reducing the load of the high concentration organic wastewater.

In general, in the treatment and treatment of various wastewater such as livestock wastewater, domestic wastewater, factory organic wastewater, phosphorus, etc., the current water treatment method is a biological treatment method, and microbiological treatment method is expected to be further developed in the future.

However, the current technology is a solid-liquid separator separating sewage from the wastewater contained in the wastewater storage tank in the process of purifying various wastewaters, and an adjustment tank for adjusting the pH of the wastewater separated by the solid-liquid separator by adding a certain amount of chemicals. And a sedimentation tank for disintegrating and purifying by three to five microbial aeration tanks which decompose wastewater that has passed through the adjustment tank by constantly administering microorganisms, and precipitating contaminants in the decomposed wastewater.

However, the conventional wastewater treatment system configured as described above requires excessive installation and operation costs, and its efficiency is very low, so that small and medium-sized businesses avoid the facility and avoid the crackdown due to the excessive operation cost even if installed and operated. Unauthorized discharge has occurred frequently. In addition, the addition of chemicals to lower the pH of the waste water in the adjustment tank not only increases the additional cost accordingly, but also reduces the activity of the microorganisms in the aeration tank due to the administration of excessive chemicals, thereby preventing the waste water from being purified smoothly. there was.

Accordingly, the present invention is a pretreatment apparatus for removing or reducing organic substances and nitrogenous substances in the most efficient manner, the organic wastewater using a microbial bio-contactor which can double the reaction efficiency by sufficiently reducing the load of organic wastewater of high concentration The purpose is to provide a pretreatment device.

In addition, another object of the present invention is to provide a pretreatment apparatus for organic wastewater using a microbial bio-contactor which can reduce the cost and operating costs due to the increase in pretreatment efficiency.

In addition, another object of the present invention is to provide an apparatus for pretreatment of organic wastewater using a microbial bio-contactor which can increase the treatment efficiency due to a reduction in installation cost and efficiently attach microbial media.

The present invention for achieving the above object is a device for pretreatment of wastewater stored in a conventional reservoir, the microbial bio-contactor is installed inside the pipe connected to the reservoir, a plurality of blades on the inner surface of the microbial bio-contactor Is installed, the pipe is characterized in that the compressor for supplying air toward the microbial bio-contactor is installed.

The present invention can not only reduce the cost and operating cost due to the increase of pretreatment efficiency, but also increase the treatment efficiency due to the reduction of the installation cost, and also maintain the state of high oxidation and reduction potential of rapid waste water phase. Therefore, it is possible to increase the activity of aerobic microorganisms in the aeration tank, which has the advantage of reducing the retention time.

In particular, the present invention provides oxygen demand for the removal of organic substances and nutrients, in particular by catalyzing the conversion of the complete turbulence state of the fluid flow by the microbial bio-contactor and the interaction between materials by friction and impact. In addition to promoting the denaturation of proteins and other compounds in the wastewater and the effect of changing the appearance of the wastewater.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description will be presented a representative embodiment in the present invention to achieve the above technical problem. And other embodiments that can be presented with the present invention are replaced by the description in the configuration of the present invention.

The present invention implements a microbial bio-contactor and organic wastewater pretreatment apparatus using the contactor developed in consideration of conditions such as a constant temperature or dissolved oxygen within a range that does not affect the activity of aerobic microorganisms in order to increase the purification capacity of the wastewater. I would like to.

Specifically, when the circulation of wastewater increases in the activation of microorganisms, the shear stress is increased so that the microbial membrane does not grow properly, and the microorganisms in the aeration tank are not properly attached to the microorganisms and desorption occurs, and the circulation flow rate is small. The ground shear stress is reduced so that the aeration in the aeration tank does not occur properly and the microorganisms grow excessively and the total density of the media is reduced. The microorganisms utilize aerobic microorganisms in the aeration tank. Therefore, the aerobic microorganism does not interfere with the activity when the conditions such as a constant temperature, dissolved oxygen, and at the same time increases the ability to purify the waste water, and in view of these points it is to develop a microbial bio-contactor and a pretreatment apparatus using the contactor. .

As described above, in the present invention, a micro-bio contactor is installed and used in a pretreatment device for organic wastewater. The microbial biocontactor is a main component of the present invention.

That is, in organic wastewater treatment, in particular, livestock wastewater has a very low oxygen dissolution rate (DC 0.01 to 0.1 maximum) due to the anaerobic properties of the wastewater, so it is very difficult to expect microbial activity. In addition, since the protein is the main raw material, it is very difficult to increase dissolved oxygen by general aeration.

Therefore, in the present invention, it is possible to raise the dissolved oxygen amount up to 8.45pmm by pretreatment of the wastewater to improve the efficiency and increase the efficiency by using the microbial bio-contactor can sufficiently improve the purification of organic high concentration wastewater, such as livestock wastewater.

On the other hand, the compressed air injected into the microbial bio-contactor of the present invention generally uses the air pressure of the air compressor without using a roots blower. The fluid-engined flow for impact and friction ensures sufficient dissolution rates even with low volume air input. Hereinafter will be described in detail the principle of such a microbial bio-contactor.

First, the waste water stored in the storage tank is separated into a solid-liquid separator and collected in the storage tank, and the wastewater contained in the storage tank is installed with the microbial bio-contactor 10 by the self-suction pump 104 as shown in FIG. At a high flow rate into the pipe 108. At this time, the air pressure of 3Kg / cm ² is simultaneously introduced using a compressor (Compressor Air: 114). Then, the waste water is passed through the inside of the pipe 108 in which the bio-contactor 10 is installed by the self-priming pump 104 generating a predetermined driving force. At this time, the contaminated wastewater undergoes oxidative collision in the instantaneous friction and vortex, and fine particles of water molecules and contaminants in the wastewater not only increase the specific surface area of the contaminants, but also increase the dissolved oxygen in the wastewater, resulting in oxidative contamination. May promote oxidation of the material.

Therefore, the present invention as described above can easily reduce the pollutant concentration of the high concentration wastewater, and the dissolved oxygen in the wastewater is increased to help microorganisms quickly decompose contaminants in the aeration tank, thereby applying the conventional simple aeration biological system. The efficiency improvement of more than 98% can be realized in terms of the efficiency of removing pollutants in municipal waste water. In addition, it can remove more than 98% of organic substances such as COD, BOD, SS, TP, and TN contained in the wastewater, and can also shorten the wastewater purification treatment period and reduce the installation area. .

On the other hand, the technical characteristics of the microbial bio-contactor of the present invention having the above principle are as follows.

First, to remove or reduce organic and nitrogenous substances in the most efficient way, it is a device that can double the reaction efficiency by reducing the load of organic wastewater of high concentration in particular.

Secondly, it is possible to minimize the secondary pollution by the nature-friendly method applying the fluid engineering principle, and also to increase the specific surface area of the residual organic matter by inducing impact friction on the wastewater containing a large amount of organic material, It is possible to increase the reaction rate and minimize the residual organic concentration in the effluent after treatment.

Thirdly, the injection of compressed air for sufficient pressure and speed induces very fast oxidation, which can reduce the unit treatment time, and 50 ~ 60% of organic matter and nutrients without chemical treatment for pretreatment of high concentration organic wastewater. It can be removed until.

Fourth, increase the dissolved oxygen in the wastewater to 5 ~ 8mg / L (ppm) to amplify the bioactivity (most dissolved organic wastewater has 0.01 ~ 1ppm dissolved oxygen), and the fatty acid in the high concentration of organic wastewater It has the effect of separating and removing compounds, insoluble proteins and oils, which can double the activity during secondary treatment.

Fifth, it is possible to maintain the temperature of the waste water up to 14 ~ 20 ℃ even in winter, to maintain the biological activity, so that the solubilization process of insoluble substances in organic matter is short, so that the decomposition and intake of microorganism can be easily made, and also oxidized And because it increases the reduction potential to proceed quickly from reduction to oxidation, there is an advantage that easy removal of chlorine and phenol in the waste water.

Sixth, it is easy to remove odors (livestock wastewater, fishy fish, domestic wastewater, sewage, etc.) in wastewater, and it is easy to adjust pH, and it can double sterilization effect by doubling high concentration of ozone or plasma contact efficiency. have.

Seventh, since the complete gas-liquid mixture is minimized, the impact load is minimized and the activity is remarkably improved, and the existing wastewater facility can be easily connected and reinforced.

Eighth, it is very economical and effective in terms of simple and unattended operation as well as complicated conventional pretreatment process compared to conventional wastewater facilities.

As described above, the effects of the microbial bio-contactor which is an important technical configuration of the present invention are specifically listed as follows.

Although there are differences in application criteria according to the characteristics and concentrations of the microbial bio-contactors for wastewater treatment, the dissolved oxygen dissolved level is determined based on the level of about 7 ppm (mg / L). This is to calculate the oxygen consumption rate by microorganisms in the wastewater that passed through the active control tank to provide enough oxygen consumption when ingesting organic substance decomposition and to provide sufficient efficiency of aerobic microorganism growth and metabolism. This is because the level of metabolism can be raised sufficiently.

In addition, the efficiency of microbial nutrient intake (Nitrogen, Phosphate) is very closely related to oxygen, and in general, nitrogen (Nitrogen) has a lower reduction rate under semi-aerobic or anoxic conditions than aerobic conditions. Phosphate, on the contrary, increases the rate of metabolic metabolism in aerobic conditions.

Therefore, by properly reflecting these conditions in operation, the nutrient removal efficiency can be doubled. However, the current situation of livestock wastewater is that the pollutants such as livestock wastewater are changed to aerobic conditions due to their specific characteristics, and are very mild under general aeration conditions, resulting in double waste of time, operation cost and facility scale. In particular, by reducing the physical properties of the reduced state of livestock waste to the oxidation state in the fastest time, it is possible to solve the difficulty of treatment without expanding the existing facility scale.

In the following, the effects and features of the microbial bio-contactor of the present invention will be described in detail while presenting various experimental data.

1. The cause of TN reduction is good when microbial biocontact is applied to organic wastewater pretreatment.

In the case of livestock wastewater, that is, it consists of TKN, KJ-N, NH3-N, NO2-N, NO3-N, and organic nitrogen. In most houses, manure is collected in mixed wastewater storage tanks, where manure and urine are separated using a solid-liquid separator (0.25 m / m-0.5 m / m). Separated fermented sawdust or chaff mixed fermentation is used as compost, but in the case of urine (처리 1) is first processed into liquid fertilization (液肥) or used as a resource for grassland, paddy fields, fields, or other crops, or final treatment The most important factor in this process is that the solids are well separated and the final wastewater is treated well when discharged from the barn and processed before 24 to 48 hours (ie 1 day-2 days).

For this reason, the urine released from the barn is the most easily treated because it is not anaerobic. However, most of them are anaerobic because they are discharged from the barn and stored for a long time in a group of reservoirs. What happens when the livestock wastewater is anaerobic? The feed of pigs is a grain feed, so when it is anaerobic, most of them produce oil, protein, and fat. This most adversely affects the treatment of money wastewater.

Therefore, no set of anaerobic wastewater (called the reduced state) can be treated by any process unless it is converted to an oxidized state (aerobic state). Therefore, the microbial bio-contactor of the present invention is composed of unit elements (indicating individual biochips in the drawing), and the air is drawn together to create a tubent with a high flow rate in the air by inhaling air in the atmosphere together. It quickly dissolves O ₂ (20.95%) in wastewater and destroys very small suspended solids, and also converts insoluble substances in organic matter into soluble substances in a short time. It also shortens the process of adsorption decomposition to 10-15 minutes and at the same time reduces NH ₃ -N (more than 90%).

That is, 2NO ₃ + organic carbon water → nitric acid → N ₂ + 2OH + 4H ₂ O

2N0 ₂ + Organic Carbonate → Nitrous Acid → N ₂ + 2OH + 2H ₂ O

Decreases via NH ₃ → NH ⁺ ₄ → NO ^- ₃ → N ₂ .

In addition, the conversion of the waste water from the negative (reduced) state to the positive (oxidized) state measured by the ORP measuring system means that the nitrogen (T-N) reduction is good as described above. At a high concentration of more than 10000ppm, the reduction of nitrogen is about 30-50%.

2. The cause of reduction of BOD , COD , SS is good when using microbial biocontact

In the process of mixing air (O ₂ ) in the air into the wastewater, when the wastewater passes between the air pressure of 4Kg / ㎠ and the unit element, finely destroys the suspended solids and increases the surface area. Oxidation proceeds rapidly as protein and fat are separated from the foam and act as a kind of filtering function. So, for wastewater, Aldehyde, Formic acid, Formic, Ethyl, Indol, Scadol, Oxalisobuthyl, Propionic- Isopropyl, etc. are sent to the foam at a very high speed to remove the odor. TN is also removed by the above principle at the same rate.

3. Efficiency and Results of Microbial Bio Contactors

Unlike other acidic methods and liquid phase separation methods, the microbial bio-contactor of the present invention can obtain efficiency within a short time, so that the effect on the surrounding environment is small and the retention time of wastewater can be shortened in the treatment plant. It is advantageous and can be a very economical facility because it can reduce the vastness of the treatment facility, minimize the aeration tank and simplify the auxiliary facilities.

The injection of air is adjusted according to the inflow water quality, and the higher the BOD and the higher the concentration of nutrients, the more air is required for the microbial bio-contactor used for pretreatment. You get a maintenance fee.

Odor (odor) is oxidized in the reduced state by the increase of dissolved oxygen to inhibit anaerobic fermentation and decay microbial activity is eliminated as the initial oxidation and reduction potential increases.

4. Removal Efficiency of Organic Substances and Nutrients According to Wastewater Characteristics of Microbial Bio Contactor

In fact, after three months of trial operation at the Royal Palace wastewater treatment plant in Iksan-si, the data shown in Table 1 below were obtained. In addition, simulation data is the result of the average value obtained by designing a microbial bio-contactor to livestock wastewater. As described above, the microbial bio-contactor is a device that amplifies the oxidation degree of the physical constituents of the high concentration organic wastewater and controls the flow of hydrodynamics, thereby changing its chemical properties with physical changes.

division enemy Activity regulator of microbial biocontact Remarks  BOD 15,000 8,250 45% removal Simulation data 3,000 1,200 60% removal Iksan Royal Palace Trial Run  T-N 5,500 3,410 38% removal Simulation data 770 423 45% removal Iksan Royal Palace Trial Run  T-P 1,350 742,5 45% removal Simulation data 51.4 38.6 25% removal Iksan Royal Palace Trial Run

Therefore, the microbial bio-contactor method can be easily achieved by using chemical coagulant as a nature-friendly method or by various methods such as electrodialysis, B3 method, Membraine method, anaerobic digestion method, flotation separation method, RBC method, etc. have.

5 . Excellence of Microbial Bio Contactor

(1) In case of high concentration organic wastewater, COD and BOD decrease by about 30 ~ 60%, T-N 30 ~ 45% or more, T-P 10 ~ 20% or more, and SS, 30% ~ 50% or more.

(2) Amplify the microbial activity in the aeration tank by increasing dissolved oxygen (DO) to 5-8.4ppm.

(3) When DO passes through the microbial bio-contact, the oxygen duration lasts for a long time, but if Roots Blower is used, the amount of dissolved oxygen disappears in a short time.

(4) It is converted in a short time from anaerobic (reduction) to aerobic (oxidation).

(5) The conversion of ORP (oxidation potential difference) is fast from (-) to (+), and in the case of livestock wastewater, it rises from raw water (-100) to high (+700).

(6) It is very excellent in microbial activity aeration tank by not using any chemicals.

(7) Excellent for removing odor by increasing oxidation degree.

(8) The oxidation of nitrate nitrogen and phosphate is excellent.

(9) It is easy to supplement existing equipment.

(10) Unmanned operation and maintenance cost is low.

(11) Nature friendly method using fluid engineering principle, no secondary pollution.

(12) Efficiency is maximized by induction of complete gas and liquid mixing.

(13) In the case of livestock wastewater, it can be made into liquor and used as a resource.

(14) When only 1/10 of chicken and pig are mixed and recycled, it is free from odors and helps to prevent disease.

(15) Rapid growth in hydroponic cultivation.

(16) Either discharge or discharge treatment systems are possible.

6. Application Field of Microbial Bio Contactor

Livestock wastewater, organic factory wastewater, slaughterhouse wastewater, organic landfill wastewater, food processing plant wastewater, domestic waste and sewage, golf course wastewater, fish farms, fish farms, freshwater lakes, paper wastewater, hydroponics, and other organic wastewater.

7. Micro - Bio Contactor TEST result of contactor )

Hereinafter, the present invention will be described in detail based on the preferred embodiment of the present invention, but the present invention is not limited to the embodiment.

{Example 1}

As shown in Figures 1 to 4, the microbial bio-contactor 10 of the present invention is typically used in the assembly of 8 to 10 units inside the pipe for wastewater treatment, specifically, the individual blades 16, Each of the bodies 14 and 20 formed with 22 forms a biochip 12 formed in a cylindrical shape due to the combination of the bodies 14 and 20.

That is, the microbial bio-contactor 10 is composed of a plurality of biochips 12a, 12b, 12c, as shown in FIG. 2, wherein the biochips 12a, 12b, 12c are semi-cylindrical and have a blade 16 on the inner surface. And 22, each body 14, 20 formed therein.

In the present invention, when naming the biochip, each reference number (12, 12a, 12b, 12c) is described in order to help the understanding of the present invention. Only reference numbers arbitrarily selected from the reference numbers 12, 12a, 12b, and 12c will be selected and described.

In particular, the body 14, 20 of the biochip 12 has a tongue-shaped blade (16, 22) is formed, respectively, the reason for such a shape is that the waste water supplied from the reservoir pressure of the self-suction 104 This is because when a flow rate is given, a tubular (turbulent) is generated, and since the frictional connection of the wastewater is intense, the molecules of the wastewater cause oxidation and reduction, thereby reducing various organic substances.

In addition, when the above-described biochip 12 is composed of 8 to 10 microbial bio-contactor 10, the blades (16, 22) formed on the inner surface of the body (14, 20) of the biochip 12 is shown in FIG. As shown in FIG. 4, the angles may be zigzag-shaped differently to match the concentration of the wastewater, and as shown in FIG. 4, the blades 16 and 22 may be manufactured to form different directions while maintaining a constant interval. It can completely change the appearance of the wastewater.

{Example 2}

5 to 6 is a view showing in detail the pre-treatment device of the organic wastewater in which the microbial bio-contactor 10 of the present invention is mentioned above, the pretreatment device 100 is an impeller 102, self-suction pump 104 , Motor 106, oil / water separator 110, permanent magnet 112, and compressor 114. The impeller 102 is provided with a pipe 108 in which the microbial bio-contactor 10 of the present invention is installed, and the pipe 108 is connected with a connection pipe 116 provided with a permanent magnet 112 and a compressor 114. do.

That is, the motor 106 is connected to the self-priming pump 104, the impeller 102 is installed in the self-priming pump 104 serves to transfer the wastewater supplied from the reservoir to the pipe 108. In addition, the microbial bio-contactor 10 mentioned above is installed inside the pipe 108, and a connection pipe 116 for connecting air supplied from the compressor 114 to the pipe 108 is connected to one side thereof. The compressor 114 is a device for supplying air pressure (preferably 3 ~ 5kg / ㎠ air pressure) having a constant pressure, one side of the compressor 114, the permanent magnet 112 and the oil-water separator 110, respectively Is installed. In this case, the compressor 114, the permanent magnet 112, and the oil / water separator 110 are connected to each other by a connection pipe 116.

A process of pretreating organic wastewater using the pretreatment apparatus 100 of the present invention configured as described above will be described.

First, wastewater stored in a conventional storage tank (not shown) is separated once the waste (SS) with a solid-liquid separator (not shown), and then the wastewater using a self-suction pump 104, the microbial bio-contactor 10 Flows into the installed pipe 108 at a high flow rate, causing a turbulent to pass. At the same time, the air pressure of 3kg / cm 2 to 5kg / cm 2 is introduced into the pipe 108 using the compressor 114 from the outside. At this time, the air passes through the permanent magnet 112 having magnetic force and oxygen in the air is converted into oxygen.

Thereafter, the wastewater is passed through the pipe 108 in which the microbial bio-contactor 10 is installed by the self-suction pump 104 generating a predetermined driving force, and an oxidized ooze is generated in the instantaneous friction and vortex and contaminated with water molecules in the wastewater. At the same time, the particles of the material are finely granulated, and the molecules of the wastewater have a strong oxidizing power, and not only increase the specific surface area of the pollutant, but also increase the dissolved oxygen of the wastewater to promote oxidation of the oxidative pollutants.

Thus, the present invention can easily reduce the contamination levels of the high-concentration waste water, by suction, as the air in the atmosphere O ₂ (20.95% in the atmosphere by giving done tyubyul parent with a fast flow rate in the microbial bio-contactor (10) ) Quickly dissolves in the wastewater and at the same time destroys very small suspended solids. In addition, it plays a role of shortening the process of adsorption and decomposition of microorganisms by 10-15 minutes by performing the role of converting insoluble substances in organic matter into soluble substances within a short time. In addition, by increasing the amount of dissolved oxygen in the wastewater, microorganisms can be quickly decomposed in the aeration tank, so that when applied to the conventional simple aeration type biological system, it is possible to realize an efficiency improvement of more than 98% in terms of efficiency of removing pollutants in the wastewater. In addition, as much as 98% or more of organic substances such as COD, BOD, SS, TP and TN contained in the wastewater can be removed, and the wastewater purification treatment period can be shortened and the installation area can be reduced.

1 is a view showing the configuration of a biochip according to an embodiment of the present invention.

FIG. 2 is a view illustrating a state in which the biochips illustrated in FIG. 1 are assembled to each other and constitute one microbial biocontactor.

Figure 3 is a view showing a state in which the blades of the microbial bio-contactor shown in Figure 2 are installed in a zigzag shape different from each other.

Figure 4 is a view showing a state in which the blades of the microbial bio-contactor shown in Figure 2 are installed in different directions while maintaining a constant interval.

5 and 6 is a view showing a pretreatment apparatus for organic wastewater equipped with a microbial bio-contactor according to the present invention.

Claims (5)

In the apparatus for pretreatment of wastewater stored in a conventional reservoir, A microbial bio-contactor is installed inside the pipe connected to the reservoir; Pretreatment device for organic wastewater, characterized in that a plurality of blades are installed on the inner surface of the microbial bio-contactor. The method of claim 1, Always blades are pre-treated organic wastewater, characterized in that installed in the inner surface of the microbial bio-contactor in a zigzag shape different angles. The method of claim 1, The blade pretreatment apparatus for organic wastewater, characterized in that installed on the inner surface of the microbial bio-contactor in different directions while maintaining a constant interval. The method according to any one of claims 1 to 3, The pipe is a pre-treatment device for organic wastewater, characterized in that the compressor for supplying air toward the microbial bio-contactor is installed. The method of claim 4, wherein The compressor is a pre-treatment device for organic wastewater, characterized in that for supplying the air pressure of 3kg / ㎠ ~ 5kg / ㎠ to the pipe.

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