KR20150095390A - Apparatus and method for treating high concentration organic wastewater - Google Patents

Abstract

The present invention relates to an apparatus and a method for treating high concentration organic wastewater, wherein the apparatus includes: a heating reactor, a multi-stage foaming tank, and a heat-exchanging culturing tank; the heating reactor maintains the state in which microorganisms and an active ingredient additive are mixed while supplying heat generated during the oxidation of organic matter in inflowing water by the microorganisms, through a culturing tank heating pipe unit to the culturing tank, therefore, the temperature of the culturing tank is adjusted by the heat generated depending on the load of the inflowing organic matter, and furthermore, the culturing amount is changed by the adjusted growth rate of the microorganisms in the heat-exchanging culturing unit and the microorganisms proliferated in the culturing tank is supplied to the heating reactor and the multi-stage foaming tank in order to maintain the activity and the amount of the microorganisms in the entire process. In the final process with aerobic microorganisms in the multi-stage foaming tank after removing high load organic matter from the heating reactor, the microorganisms are supplied in a state in which the decomposition of high molecular organic matter are progressed due to the high activity of the microorganisms supplied to the heating reactor, therefore the decomposition efficiency in the multi-stage foaming tank can be stably maintained. The culturing tank changes the temperature to be suitable for the inflowing organic waste water without an extra warming apparatus or control apparatus by the calories supplied by the heating reactor, therefore, the necessary activity of the microorganisms can be changed. In addition, by distinguishing logarithmic growth phase associated with the microorganism activation and growth retardation associated with maintaining aerobic a heat processing rate, the change in growth rate due to temperature among the growth conditions of the microorganisms can be minimized.

Description

Technical Field [0001] The present invention relates to a high concentration organic wastewater treatment apparatus and a wastewater treatment method,

The present invention relates to a high concentration organic wastewater treatment apparatus and a wastewater treatment method, and more particularly, to a high concentration organic wastewater treatment apparatus and a wastewater treatment method in which effluent treatment efficiency is improved by using an exothermic reaction tank and a heat exchange type culture tank.

The culture tank used in general high concentration organic wastewater treatment facility is designed to supply excess amount of bacteria by supplying a margin to the influent water quality at the time of designing. . In the case of constructing a device for regulating the production amount of cells in a culture tank, the supply amount may be controlled by measuring the amount of the cell mass in the culture tank, the inflow load of the influent water, and the concentration of the reaction tank and treated water. High initial facility cost, low efficiency of control, low utilization. Generally, a method of supplying a substance for culturing a cell culture and a seed bacterium to a process after storing a larger amount of the culture medium than the culture medium required in the treatment process is generally used. As a result, as the storage time elapses, It is possible to obtain the effect of lowering the efficiency of the reaction tank and reducing the amount of water to be supplied to the reaction tank. The microbial reaction conditions of the microorganisms can not be kept constant. These changes are accompanied by the change in the ratio of the microbial cells in the reaction tank and the lowering of the treatment efficiency, which makes it difficult to secure a stable treated water quality.

The high concentration organic wastewater generally contains a large amount of high molecular weight substances and requires a difference in the reaction conditions of the microorganisms formed at the front end and the rear end of the reaction tank. The temperature required for the microorganism during the exothermic reaction at the front end and the multi- The temperature of the reactor can be varied. If the process is directly connected to the reactor, there is a problem that the effluent of the exothermic reactor at a relatively high temperature lowers the microbial activity of the multistage aeration tank.

Generally, the generation of high concentration organic wastewater shows a considerable change rather than a constant load. In general, when the load changes suddenly after a high load, the adaptation time of the microorganisms in the reaction tank increases and the actual treatment time decreases. The problem also occurs.

It is an object of the present invention to provide a high concentration organic wastewater treatment apparatus and a wastewater treatment method improved in wastewater treatment efficiency.

In order to achieve the above-mentioned object, the present invention provides an exothermic reaction tank in which organic wastewater is treated by a microorganism and heat is generated in the process; A heat exchange type culture tank connected to the exothermic reaction tank, for culturing microorganisms and supplying the microorganisms to the exothermic reaction tank; And a heat exchanger installed in each of the exothermic reaction tank and the heat exchange type culture tank for transferring the heat generated in the exothermic reaction tank to the heat exchange type culture tank.

In the present invention, the heat exchanger preferably includes a heat pipe.

In the present invention, the microorganism is preferably a soil microorganism.

The wastewater treatment apparatus according to the present invention preferably further comprises aeration tank provided at least one downstream of the exothermic reaction tank.

It is preferable that the wastewater treatment apparatus according to the present invention further comprises a separation membrane tank provided on the downstream side of the aeration tank.

The present invention also provides a method of treating organic wastewater using microorganisms in an exothermic reaction tank, Transferring heat generated in the exothermic reaction tank to a heat exchange type culture tank through a heat exchanger; And culturing the microorganisms in a heat exchange culture tank through heat supplied from an exothermic reaction tank and supplying the microorganisms to an exothermic reaction tank.

According to the apparatus and method for treating wastewater of the present invention, the heat generated during the organic matter oxidation process of microorganisms is transferred to the culture tank to treat the high concentration organic wastewater, and the growth rate of the microorganisms is controlled by mixing with the active material in the culture tank. The amount of cultured cells supplied to the aeration tank can be supplied in an appropriate amount. In addition, a device for mixing the active material into the culture tank is installed in the culture tank, and the temperature required for increasing the growth rate during the culturing is supplied from the heating reaction tank through the heating device. It is not necessary to install a gauge and a controller to measure the microbial activity and the amount of microbial cells in a separate reaction tank, and the cultured microorganism is always cultured at a necessary supply amount, It is possible to maintain the activity and control the growth rate of microorganisms. In addition, since the concentration of the cells in the culture medium is controlled, there is no change in the amount of the culture liquid supplied to the exothermic reaction tank and the multistage aeration tank in the culture tank, so that the efficiency of the treatment process can be increased by maintaining the hydraulic retention time and the circulation rate constant in the reaction tank. With regard to changes in influent load or changes in external conditions, the bacteria in the culture tank can be constructed in a state of being mixed with the active substance and having a relatively stable stability and a shorter adaptation time to the change than the microorganisms in the reaction tank.

1 is a configuration diagram of a heat transfer type high concentration organic wastewater treatment apparatus according to the present invention.

More specifically, the present invention relates to an apparatus for treating a high concentration organic wastewater, comprising an exothermic reaction tank, a multistage aeration tank, and a heat exchange type culture tank, wherein the exothermic reaction tank comprises an active additive and a microorganism The heat generated during the oxidation of the organic matter of the influent water to the culture tank is supplied to the culture tank through the culture tank heating piping to maintain the mixture in the culture tank by heat generated proportional to the influent organic matter load in the heat- The microorganism growth rate in the heat exchange type incubator is controlled and the amount of culture is changed, and the microorganism propagated in the culture tank is supplied to the exothermic reaction tank and the multi-stage aeration tank, Heat transfer type high concentration organic wastewater It relates to the re-technology.

According to the present invention, when a high load of organic matter is removed from an exothermic reaction tank and the final treatment is performed by aerobic microorganisms in a multistage aeration tank, the high-molecular organic matter is supplied in a decomposed state due to high activity of the cultured microorganisms supplied to the exothermic reaction tank, Thereby making it possible to stably maintain the decomposition efficiency in the multi-stage aeration tank. The required activity of the microorganism can be changed by changing the temperature of the culture tank to suit the properties of the organic wastewater by the amount of heat supplied from the exothermic reaction tank without a separate heating device or control device. In addition, by distinguishing the growth period associated with the algebraic growth period (the period during which the microbes proliferate rapidly due to the abundance of food) associated with microbial activation and the maintenance of the aerobic exothermic rate (the period during which the growth rate is slowed down and the microbes are reduced as the food is reduced) , It is possible to minimize a change in the growth rate due to temperature in the microbial growth conditions.

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

1 is a structural view of a heat transfer type high concentration organic wastewater treatment apparatus according to the present invention. The wastewater treatment apparatus according to the present invention includes an exothermic reaction tank 20, a heat exchange type culture tank A heat exchanger 40, aeration tanks 50, 60, 70, and 80, a separation membrane tank 90, and the like.

The raw water 10 may be high concentration organic wastewater, livestock wastewater including livestock manure, food wastewater, and the like, or mixed wastewater thereof. The high concentration in the present invention may mean, for example, a case where the oxygen demand (BOD) is 10,000 mg / L or more. The raw water 10 flows into the exothermic reaction tank 20.

The exothermic reaction tank 20 is a reaction tank in which organic wastewater is treated by microorganisms, and heat is generated during the treatment. In the treatment of high concentration wastewater, microorganisms react with organic matter and air to generate heat, and the temperature rise due to heat generation may be at least 0.1 ° C, preferably at least 1 ° C, more preferably at most 20 ° C, have.

The operation temperature of the exothermic reaction tank 20 may be 0 to 45 캜, preferably 20 to 40 캜, for example 30 to 44 캜 in summer and 20 to 30 캜 in winter. In addition, the mixed solution suspension solid (MLSS) concentration of the exothermic reaction tank 20 may be 6,000 ppm to 15,000 ppm, the pH may be 6.5 to 8.5, the redox potential (ORP) may be -400 to 200 mV, The oxygen (DO) concentration may be between 0.1 and 5 ppm. The exothermic reaction tank 20 may be a desorbing tank where aeration is performed.

The heat exchange type culture tank 30 is connected to the exothermic reaction tank 20, cultivates microorganisms, and supplies the microorganisms to the exothermic reaction tank 20. Heat required for culturing the microorganism is supplied from the exothermic reaction tank 20. The temperature has a great influence on the treatment process. In order to maximize the efficiency of the culture tank 30 by transferring the heat source generated during the treatment of the organic high concentration wastewater in the exothermic reaction tank 20 to the culture tank 30 using the heat transfer pipe .

The heat exchange type culture tank (30) can be composed of vertical tanks filled with high quality soil microorganisms (pellets), and a part of the sludge return sludge is introduced to produce useful microorganisms in the course of degradation of organic matter by soil microorganisms. And is capable of adsorbing and removing ammonia (NH ₄ -N) nitrogen and other contaminants due to its cation exchange ability.

Treatment of high concentration wastewater is carried out by the microorganisms present in the aeration tank (reaction tank). Appropriate temperatures must be maintained for these to grow well and to facilitate degradation. That is, the temperature has a significant influence on the processing process. Pollutants are mostly organic wastewater materials. Livestock and food wastewater consist of proteins or other macromolecules. Oil content Likewise, when organic contaminants are introduced into the aeration tank, treatment begins by aerobic microorganisms that decompose them into nutrients. In the process of decomposition, most of the action of aerobic microorganisms to decompose substances is by enzymes. These enzymes show good activity only when the appropriate temperature range is maintained, so the temperature must be appropriate for the degradation to occur smoothly.

The formation of aerobic microbial communities should facilitate the degradation of organic pollutants. The growth of microorganisms is extremely sensitive to temperature. This is the law that applies to all organisms living in water, as well as silk microorganisms. If the water temperature is too high or too low, these microorganisms can not grow properly and the microbial existence itself is threatened. As a result, when the temperature is appropriate, the number of microorganisms can be increased and the treatment efficiency is increased.

However, when the water temperature is too low (15 ° C or less) or when the water temperature is too high (40 ° C or more), the treatment efficiency may drop sharply.

Accordingly, in the present invention, the excess sludge is removed from the active material and the overload (which may occur at any time) by using the heat generated in the process of flowing the high concentration wastewater into the exothermic reaction tank 20 (winter 20-35 캜, summer 30-40 캜) And a heat exchange type culture tank (30) was installed so that microorganisms can always live in the environment.

Active substances generally refers to a group of relatively high molecular weight acidic organic compounds produced by a complex process of changing organic matter in the soil. The active substances are composed of soil organic matter derived from animal and plant fluids and their secretion effluents, especially dark amorphous colloidal polymers It means the county.

The temperature condition of the heat exchange type culture tank 30 should be maintained at 25 to 40 캜 similar to the temperature of the exothermic reaction tank 20 to maintain the proper environment so as to produce useful microorganisms having a water-resistant structure.

The microorganism cultured in the heat exchange culture tank 30 is preferably a soil microorganism. The soil microorganism may preferably comprise silicate degrading bacteria. Silicate-degrading bacteria decompose silicate materials and fix nitrogen and carbon in the atmosphere using silicon, phosphorus and various minerals as raw materials, and synthesize their own organic materials. Examples of the silicate-degrading bacteria include Proteus milabilis, Bacillus mucijaginosus, Bacterium caldotyticus and the like, alone or in combination.

A heat exchanger 40 such as a heat transfer tube or a heat transfer plate which facilitates heat exchange is provided between the exothermic reaction tank 20 and the culture tank 30 and the temperature between the exothermic reaction tank 20 and the culture tank 30 is set at a concentration And can be self-regulated by the heat generated in the decomposition process.

The heat exchanger 40 is installed in each of the exothermic reaction tank 20 and the heat exchange type culture tank 30 to transfer heat generated in the exothermic reaction tank 20 to the heat exchange type culture tank 30.

The heat exchanger 40 preferably includes a heat pipe. In the present invention, the heat pipe includes not only a tube shape but also a plate or a chamber shape, that is, a combination of a tube, a plate, and / or a chamber.

A heat pipe is a pipe for efficiently conveying heat, which is also referred to as a heat pipe. It could be a pipe filled with volatile liquid with a small hole in the inside of the pipe. When heat is applied to one end of the pipe, the liquid evaporates and can move to the other end with thermal energy. It can be configured to radiate from the other end of the pipe and return to its original position through the inside. Copper, stainless steel, ceramics, tungsten, or the like may be used as the material of the main body, and porous fiber and the like may be used for the wall. Methanol, acetone, water, mercury and the like may be used as volatile substances in the interior.

A heat pipe is a mechanism that encloses an appropriate amount of liquid in a vacuum tube, which can transmit considerably more heat than a metal rod having the same cross-sectional area. The principle is that when heated at one end, the liquid evaporates and condenses on the other end (cooling side) past the center of the tube, and it is automatically returned by the capillary force through the wik (grooved groove) inside the tube . The shape of the heat pipe is not necessarily a pipe, but it may be a plate or a chamber, and some may contain gas.

When a liquid such as water or alcohol is put into a depressurized pipe and one side is heated, the liquid flows into the other side as vapor, and when the liquid flows into the other side, the liquid returns to the heating part by capillary phenomenon. It is possible to apply the principle of transferring the heat repeatedly from the heating section to the heat dissipating section. A heat pipe can be a heat pipe using a principle that an evaporable liquid is sealed in a pipe and the end of the pipe is evaporated when it is heated and condensed at the other end to radiate heat.

A heat pipe is a pipe that conducts heat efficiently. The heat pipe may be a pipe obtained by attaching a core material such as a glass fiber or a mesh wire to the inside of aluminum, steel, or copper pipe, filling a heating medium such as Freon or ammonia, . The thermal conductivity is as high as 1,000 to 1,500 times that of copper.

The heat pipe may include a phase change material (PCM) as an internal thermal medium. Phase change materials are substances that absorb and emit heat while changing phase from solid-liquid-gas to gas-liquid-solid at a certain temperature. As the phase change material, water, paraffin series, organic hydrate, ethylene series, vegetable surfactant and the like can be used. Especially, among the phase change materials in nature, vegetable surfactants having high latent heat and heat storage performance, special substances for temperature control and dehumidification (Eco-carat: a type of volcanic ash that removes moisture) is preferably used. Conventionally widely used PCM materials are paraffin-based chemicals, which are not environmentally friendly, are highly combustible and relatively expensive, but phytonutral surfactants are environmentally friendly, flame retardant and inexpensive.

The phase-change material has a low melting point (melting point) and has a high heat storage capacity, so it is used as a heat storage medium. PCM is applied to various fields because it can adjust the melting point and freezing point according to the desired temperature. In addition, it is lighter in weight than conventional products, has the advantage of reducing installation space, and can save cost by power-free. Generally, paraffinic materials are used as PCM, but they have low density and thermal conductivity, they are flammable and relatively expensive. In contrast, the eutectic system among PCM materials is preferred because it can dissipate and absorb heat at a desired temperature. When the phase change occurs, the volume change is small, the temperature can be maintained at a constant temperature, It also has an advantage. In addition, the ability to reproduce the cycle is 30 times higher than that of the paraffinic material, thus achieving ideal thermal storage performance. However, despite these advantages, when PCM is used for cooling and heating using solar energy, phase separation, supercooling phenomenon, and heat conduction problems are caused. To solve these problems, PCM can be made into a microcapsule, which is a polymer material, to increase the thermal efficiency and realize a stable cycle.

PCM can be divided into a eutectic mixture series and a peritectic series on the basis of the composition concentration and the state transition at the time of crystal formation in the phase change process. Another classification method of PCM can be divided into organic and inorganic materials or mixed forms of these materials depending on the constituent materials. The characteristics of organic PCM are generally low density and low calorific value, but have the advantage of less corrosivity and less volume expansion than inorganic PCM. There are also a number of eutectic materials due to various alcohols, phenols, aldehydes, ketones, ethers and organic compounds.

The aeration tank (50, 60, 70, 80) refers to a device for performing oxygen adsorption and oxidative decomposition by aerobic bacteria by supplying oxygen and stirring to a mixture of wastewater and activated sludge through air.

At least one aeration tank 50, 60, 70, 80 may be installed on the downstream side of the exothermic reaction tank 20, and may be configured as a multi-stage as shown in FIG. The number of the aeration basins 50, 60, 70, and 80 can be appropriately changed as needed.

When the aeration tanks 50, 60, 70 and 80 are constructed in multiple stages, even if the aeration tank has the same capacity, if the aeration tank is divided to increase the number of aeration tanks, the ability to cope with changes in the raw water properties is excellent, There are advantages. The aeration tank (reaction tank) can be configured in a batch manner.

The membrane separation tank 90 refers to a filtration apparatus using a membrane. As the separation membrane, a hollow fiber membrane, a flat membrane, or the like can be used. As the material of the separation membrane, cellulose acetate, aromatic polyamide, polysulfone, fluoropolymer and the like can be used.

The separation membrane basin 90 may be installed downstream of the aeration basins 50, 60, 70, and 80. By providing the separation membrane bath 90, the treatment time can be drastically shortened as compared with the sedimentation tank, and the filtered water can be utilized as a liquid waste. Some of the sludge separated in the separation membrane bath 90 may be returned to the heat exchange type culture tank 30.

Further, at least one of a screen tank, a raw water input tank, a solid-liquid separator, a composting tank, a raw water storage tank, a centrifugal dehydrator, a flow rate adjusting tank, a distribution measuring tank, a liquid storage tank, a sludge return tank and a treatment tank may be additionally provided.

The apparatus and method according to the present invention can reduce the odor in the treatment plant, improve the efficiency and operation management of the treatment facility, and reduce the drug cost, the power consumption, and the operation cost, compared with the prior art.

Table 1 shows the results of treating livestock manure using the wastewater treatment apparatus and method according to the present invention. Each water quality item was measured using each meter, apparatus or device according to the water pollution process test method.

division Biological
Oxygen requirement
(BOD) Chemical
Oxygen requirement
(CODcr) Suspended matter
density
(SS) Ammonia
Nitrogen concentration
(NH ₃ -N) Gun
density
(TP) Escherichia coli
(Dogs / L) Remarks enemy 35,000 45,000 35,000 3,000 800 5,000 mg / L Treated water 60 200 70 50 10 300 Below

The present invention relates to a natural purification technique using self heat generation in a heat exchange type incubator. The natural purification method focuses on the fact that soil bacteria change the way of life by environmental conditions. Metabolism is obviously different from when soil bacteria live in the condition of free oxygen and when they do not exist Has been proven by experiments, and it is natural purification method that established it as technology.

Soil bacteria in a living environment without free oxygen emit metabolites containing compounds of phenol or phenol exposure groups as their metabolites. Phenol metabolism is present in an environment where other germs can not inhabit because of extremely high antimicrobial activity due to phenolic metabolic products at the same time with the group of anaerobic bacteria of the soil type, anaerobic bacteria of the soil type, anaerobic bacteria of the soil type, Bacteria (soil bacteria) are made in the system. Soluble organics are rapidly macerated, agglomerated, condensed, and polycondensed by contact with the metabolites of microorganisms, including compounds of phenol or phenol exposure groups, resulting in macromolecular changes into clay loams. In fact, there is a fundamental difference between the Natural Purification Act and all other treatment methods currently in place. The natural purification method is, in extreme terms, the theory of polymerisation. The pollutants introduced into the purification system are reduced to the polymerized soil. The feature of this treatment is to unify the metabolic functions of the soil soils with the phenolic metabolic functions to create an activating process to create the habitat environment of the soil hybrids by sufficient metabolites including compounds with phenol or phenol exposure groups.

The basic process of the natural purification method is to activate the sludge by creating a unified habitat environment with the phenolic metabolic functions and to activate the sludge by contacting the inflowed contaminants with activated soils and silicates A reaction step, and a separation step of solid-liquid separation of the polymerized sludge.

The natural purification method is a purification process of high quality soil which has the highest purification ability in the natural world. It is the purification activity by the polycondensation action or the aerobic decomposition action by the soil microorganism living in the soil, the metabolite of the soil microorganism and the reaction product thereof with the organic matter It is a new organic wastewater treatment method that maximizes the activity of purification by increasing the activity of soil bacteria by creating a living environment suitable for soil bacteria in the treatment system.

That is, a heat exchange type culture tank containing an incubator is installed in the wastewater treatment system to cultivate and activate the soil bacteria in the soil having the highest purification ability in the natural environment, while the non-soil bacteria are inactivated to inhibit the proliferation It is a method to effectively treat sewage and wastewater by inducing the microorganism in the aeration tank to the subject of soil bacteria.

A heat exchange type culture device is a device for cultivation and activation of a soil strain group (a group which metabolizes a phenolic compound), and a mixed substance which functions to activate microorganisms is filled in the inside.

The material of the filling material in the culture equipment is dried and mixed with soil organic matter and clay soil. The filler material is chelated in the incubator to polycondense the malodorous substances and promote the diversification and growth of microorganisms such as flocculation of pollutants.

As a basic reaction, organic matter is rapidly bound, granulated, aggregated, polymerized and macromolecularized by adding microbial metabolites, including compounds with phenol and phenol exposure groups. Subsequently, when an appropriate amount of a substance having a large amount of activated silicate powder is added, a polycondensation reaction is caused.

The characteristics of the natural purification method are as follows: First, the stability of the treatment improves as the forces of the soil bacteria in the treatment system are expanded. The sludge concentration (MLSS) in the aeration tank is usually operated at 6,000 to 15,000 ppm, and it has high stability against external factors such as load fluctuation and outside temperature. Second, high concentration wastewater can be diluted without dilution according to the structure of the treatment system and has a high treatment efficiency. Third, if a pyrogenic incubator is additionally installed in a facility planned by the activated sludge method, the BOD of the treated water becomes less than 10 ppm, so that it can be recycled to the heavy water and the effect of advanced treatment is obtained. Fourth, a hygienically excellent treated water is obtained. In the culture test of E. coli, generally 100 cells / cm3 or less is obtained. Since the treated water has antimicrobial activity, no decomposition due to the decomposition of residual BOD occurs, and a biologically excellent treated water can be obtained. Fifth, the maintenance cost of about 20-30% is reduced as compared with the existing activated sludge process, and addition amount of polymer coagulant and the like is reduced in the dehydration treatment of excess sludge. Sixth, there is no oxidation, fermentation, or decomposition process in the treatment process, and macromolecularization by the polycondensation reaction occurs, so there is no need for a deodorizing facility because the odor is not fundamentally generated. Since the return sludge is introduced into the raw water tank and the flow rate adjusting tank, the offensive odor generated in the inflow water is fundamentally removed, and even if the sludge is left in the anaerobic condition for a long time, no odor due to organic acids and emulsions is produced. Seventh, when the sludge of the soil group is transported to the sludge tank and the aeration tank, the foam due to the synthetic detergent and the soap component disappears, so no vesicle is required. Eighth, it has a high treatment effect of removing more than 60% of nitrogen and phosphorus contained in wastewater. Ninth, the amount of surplus sludge generated is about 20% on average of the amount of incoming BOD, and surplus sludge may not be treated for more than one year. In the tenth, sediment sludge has good separability between water and sludge and excellent dewaterability, so the use of coagulant is not necessary. Precipitated sludge is polymerized by polycondensation reaction rather than oxidation, catabolism, assimilation and decomposition process, so digestion facilities are not needed and soil reduction is possible. Eleventh, since the sludge is transported to the raw water tank and the flow rate adjustment tank, the aeration tank BOD is reduced to about 50%, and the capacity of the aeration tank can be reduced, thereby reducing the construction cost. The construction cost savings increase as the throughput increases or as the BOD of the raw water increases.

In addition, compared with the conventional activated sludge process, since the decomposition step by the microorganism is omitted and it is converted into a complex polycondensation reaction by the metabolites of microorganisms having phenol and phenol exposure groups, macromoleculeization can be fundamentally prevented , The organic sludge is stabilized without the digestion facility of the generated organic sludge, so that soil reduction or recycling is possible. The suspended solids contained in the wastewater are removed from the micro-screens of the pretreatment process. The dissolved contaminants are removed by the culture, proliferation and activation of the activated contaminants by the metabolites excreted by the activated soil bacteria, It is macromolecularized by a complex reaction and solid-liquid separation is carried out in the immersion separator. Since the dissolved oxygen demand of the soil bacteria is about 0.3 to 1.0 ppm, the initial installation cost is reduced because a large capacity of aeration device is not required. Even if the aeration or the aeration device is stopped, the soil bacteria itself does not die and is dormant When it returns to the abandonment state, it is activated, so the deterioration of the treated water quality does not occur due to the lack of dissolved oxygen in the aeration tank. Since the sedimentation sludge separated by solid-liquid separation is stabilized, a separate digestion facility is not required, and since the sludge is stabilized even when dewatering, the addition of a flocculant is unnecessary, and consequently, the treatment cost can be reduced.

According to the present invention, the natural purification method utilizing a heat exchange type incubator using self heat generated during a biological treatment process provides an environment suitable for soil bacteria in a treatment plant, As a high-concentration wastewater treatment method, it is possible to treat livestock wastewater having an inflow BOD of 35,000 mg / L up to 10 mg / L or less.

The present technology is a biological treatment method such as an activated sludge process or a contact oxidation process for organic wastewater treatment, and the basis of the biological treatment is based on the action of the sludge formed in the treatment system. In the prior art, this sludge is always influenced greatly by the fluctuation of the inflowing water, the apparatus configuration and the operating method, and is formed spontaneously. This technology consists of a system for inducing the composition of the microorganism group of sludge, which is the basic of organic wastewater treatment, to the subject of the soil group, and a system for stabilizing it after induction.

The size of the culture tank is usually about 10 to 15% of the inflow amount, and an incubator using the invention is installed in the culture tank to activate the cultivation and proliferation of the soil bacteria. The filling material filled in the incubator is operated by regulating the culture efficiency by self heat generation. When the return sludge is brought into contact with the soil microorganism in the incubator, the soil microorganism group is selectively cultivated, proliferated and activated, and the activated sludge is introduced into the aeration tank for 24 hours as much as the culture tank capacity. In a heat exchange type incubator, the best habitat condition (environment condition similar to good soil) is contained in the soil hypha group (the group which metabolizes the phenolic compound). As the soil condition is selectively cultivated, propagated and activated by this environmental condition, the non - soil - borne bacteria group (spoilage bacteria, coliform group, etc.) are inactivated to inhibit the growth.

When the exothermic incubator is operated, the sludge in the apparatus (bacteria inhabited in the apparatus) passes through the incubator and passes through the sludge, And the sludge in the apparatus becomes dominant in the soil strain along with the action of the stabilization system. The period of time in which the sludge germs in the apparatus changes to the soil type usually takes about one month. When the sludge becomes the main body of the soil sludge, the treated water and the sludge have the above-mentioned characteristics and can be discriminated by analysis or observation.

The heat exchange type incubator is a device for cultivation and activation of soil bacteria (a group of bacteria metabolizing a phenolic compound). The inside of the incubator is packed with an active substance which acts to activate microorganisms. Depending on the installation location, Built-in type (inside the tank). The material of the filling material in the pyrogenic incubator is a mixture of soil organic matter and clay soil. The filler is chelated in a heat exchanger type incubator to polycondensate odorous substances and promote diversification and growth of microorganisms such as flocculation of pollutants.

10: The enemy
20: Exothermic reaction tank
30: Heat exchange type culture tank
40: heat exchanger
50, 60, 70, 80: aeration tank
90:
100: Processed water

Claims (6)

An exothermic reaction tank in which organic wastewater is treated by microorganisms and heat is generated in the process;
A heat exchange type culture tank connected to the exothermic reaction tank, for culturing microorganisms and supplying the microorganisms to the exothermic reaction tank; And
And a heat exchanger installed in each of the exothermic reaction tank and the heat exchange type culture tank for transferring the heat generated in the exothermic reaction tank to the heat exchange type culture tank. The method according to claim 1,
Wherein the heat exchanger comprises a heat pipe. The method according to claim 1,
Wherein the microorganism is a soil microorganism. The method according to claim 1,
Wherein at least one aeration tank is further provided downstream of the exothermic reaction tank. 5. The method of claim 4,
Further comprising a separation membrane tank provided on the downstream side of the aeration tank. Treating organic wastewater using microorganisms in an exothermic reaction tank;
Transferring heat generated in the exothermic reaction tank to a heat exchange type culture tank through a heat exchanger; And
Culturing the microorganisms in a heat exchange culture tank through heat supplied from an exothermic reaction tank and supplying the microorganisms to an exothermic reaction tank.

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