KR20170045707A - A treatment method of concentrated waste water oder using soilmicrobes population - Google Patents

Abstract

Disclosed is a method for treating wastewater containing a high concentration of the nutrients and organic materials by using a soil microorganism group including facultative Anaerobic and aerobic microorganisms. The disclosed treatment method comprises: collecting odorous wastewater (inflow water) at a high concentration in a water collecting tank (10) and keeping it homogenized; directly retransferring and circulating the wastewater through first to third multiple bioreactors (12-1, 12-2, 12-3) and an aeration tank (14) in order without a chemical process; decomposing the organic substances, nitrogen and phosphorus in the wastewater to reduce an unpleasant odor peculiar to the wastewater; and discharging the treated water, having passed through the membrane in a membrane separation tank (16), to a treatment water tank (20). More over, a certain amount of activated sludge (soil microorganism group) filtered by the membrane separation tank (16) and modified and regenerated is continually retransferred to the water collecting tank (10) in which water flows in, the first to third multiple bioreactors (12-1, 12-2, 12-3) and an aeration tank (14), so wastewater containing a high concentration of the nutrients and organic materials is treated. Filtered residual sludge is sent to a sludge storage tank (18) and sludge cake dehydrated by dehydrating the residual sludge and discharging the same can be used as a good soil conditioner.

Description

 Technical Field [0001] The present invention relates to a method of treatment of high concentration odor wastewater using a soil microbial community,

The present invention relates to a method for treatment of high concentration odor wastewater using a soil microbial community, wherein when the biochemical oxygen demand (BOD) of the influent wastewater is high concentration wastewater of about 10,000 mg / l, (BOD), which is a regulation item of the discharge water quality, is reduced to a minimum level by directing the high concentration wastewater into the soil and inducing the decomposition process of the organic matter caused by the microorganisms occurring in the wastewater treatment plant to the corrosion reaction occurring in the natural soil , And at the same time to an advanced treatment method for the efficient removal of nitrogen and phosphorus, which are nutrients.

Generally, the odor in sewage and wastewater treatment methods is low. Since the wastewater is generated in the process of wastewater treatment, it is selected by physical treatment such as washing and activated carbon adsorption, chemical treatment such as chemical cleaning, oxidation, neutralization, ion exchange resin, and biological treatment such as biofilter and soil deodorization.

 Organic materials in wastewater were treated with activated sludge method or anaerobic digestion method according to biochemical oxygen demand (BOD) concentration. The activated sludge process is developed from a wastewater treatment method with low BOD concentration using secondary aerobic microorganisms after the first chemical treatment, and various modifications are made by the contact oxidation method, rotary disk method, lagoon method, etc. And the anaerobic digestion method is a method in which wastewater having a BOD concentration of 20,000 mg / l or more is heated and treated with anaerobic microorganisms.

 In addition, advanced treatment methods for nitrogen or phosphorus removal include MLE (Modified Ludzack Ettinger) method combined with anaerobic + aerobic process, A2O method combined with anaerobic + anaerobic + aerobic process, UCT method, SBR method, Bardenpho methods Which were applied considering the circumstances and economical efficiency.

Generally, biofilter, adsorption method, and chemical solution cleaning method are most commonly used to remove odor from ammonia, methyl mercaptan, hydrogen sulfide, methyl sulfide, methyl disulfide, etc. .

The adsorption method removes odorous substances by adsorbing them on activated carbon and ion exchange resin. It can be applied to various odors according to the combination of adsorbents. Therefore, compared with the advantages of many objects to be deodorized, the use period is shortened The disadvantage is that the generation of secondary pollutants and the cost of facilities and maintenance are high.

The biofilter method is an environmentally friendly treatment method that removes microorganisms by contact with odorous substances in contact with microorganism-coated filler materials. It is effective for low concentration and odor, but the pores between carriers are clogged in proportion to the use time, There is a problem that the efficiency is lowered and the efficiency is remarkably lowered at the high concentration odor.

In addition, since the chemical solution cleaning method uses a plurality of chemicals to be used in combination, the amount of the cleaning device depends on the chemicals used, so that the facility cost and the maintenance cost are increased, and the second pollution problem caused by the cleaning liquid used for removing the target odor There are disadvantages.

The activated sludge process is a treatment method that utilizes the biodegradation function of aerobic microorganisms under anaerobic conditions of the wastewater. When the wastewater is aerated in the aeration tank together with activated sludge (aerobic microorganism) and the dissolved oxygen is maintained at a certain level, It is a method of cleaning with clean water. In such a process, the activated sludge is used in most of the treatment plants which are subjected to a series of processes in which the active sludge is subjected to a decomposing and purifying action, followed by proliferation, death, sedimentation and disposal, and then returned to the beginning of the treatment process and reused.

Under the activated sludge process, the wastewater treatment plant generates odor from the inflow of lower and wastewater containing organic substances. In the process of filtering the contaminants contained in the wastewater and the wastewater, . In addition, organic matter that has not been degraded and suspended matters with poor sedimentation are contained in discharged water, nitrogen and phosphorus, which are nutrients, are discharged to the rivers, thereby causing eutrophication of the rivers, thereby accelerating river environmental pollution do. In addition, since most of the conventional sewage and wastewater treatment plants are subjected to solid-liquid separation in the second basin, the deposited sludge is transferred to the sludge storage tank, and the excess sludge generated in the aeration tank is subjected to dehydration treatment so that the amount of sludge generated is naturally increased. The processing cost of the sludge cake (CAKE) becomes enormous. Also, in order to increase the capacity of decomposing organic matters, if the aeration tank capacity is increased relatively and the sedimentation tank is made larger in order to maintain sedimentation, the increase of the construction cost and the required site are required.

Nitrogen in wastewater is oxidized to nitrate nitrogen by nitrifying bacteria such as Nitrosomonas and Nitroburter under aerobic conditions in an advanced treatment method aimed at removing nitrogen and phosphorus, Denitrifying bacteria such as micrococysts, pseudomonas, etc., are reduced to nitrogen gas and released to the atmosphere and removed. In the case of phosphorus, phosphorus release occurs under anaerobic conditions by microorganisms such as Ashinato Bakter, Aeromonas, and Pseudomonas, and when overproduction of phosphorus occurs in the subsequent aerobic conditions, phosphorus is removed by discarding the sludge.

The MLE method, which is a typical nitrogen treatment method, is a combination of anaerobic + aerobic process. The nitrification process in an aerobic tank is returned to the anoxic tank to reduce and remove nitrate nitrogen. In this process, do. In addition, there is a combination of anaerobic + anaerobic + aerobic process by the treatment method represented by A2O method. Nitrogen is oxidized to nitrate nitrogen in an aerobic tank and transported to anoxic tank for denitrification and removal. Phosphorus is extracted Remove it by discarding it.

When the A2O method is applied, microorganisms releasing phosphorus from the anaerobic tank are transported to an anoxic tank without cell proliferation and excessive intake of phosphorus in the aerobic tank, resulting in a disadvantage in that the removal efficiency of phosphorus is lowered. When the MLE method is applied, There is a disadvantage that the facility cost and the maintenance cost increase due to the additional placement of the chemical treatment process.

When the plant dies on the ground, the microorganisms that are floating in the air or present on the surface immediately begin to multiply and decompose in the body. As a microorganism related to the degradation, there are mainly a small number of yeasts in animals, and bacteria and filamentous fungi (molds) in plants.

At the beginning of the proliferation, microorganisms secrete oxygen out of the cells and decompose organic matter. For example, a protein that is the main component of an animal is decomposed by the protease protease to become an amino acid. Fats are degraded by lipases to fatty acids and glycerin. On the other hand, in plants, cellulose, which is a kind of carbohydrate, is decomposed by cellulase to become glucose.

The resulting amino acids, fatty acids, glycerin, and glucose are immediately absorbed into the microbial cells and used in various metabolic systems. Finally, the carbon that forms the skeleton of the organic matter is converted into carbon dioxide gas and released into the natural environment. The carbon released here is again consumed in the photosynthesis of the plant, and the plant releases the large amount of oxygen in the atmosphere at the same time, contributing to the material circulation.

In addition, some of the ammonia produced by decomposition and fermentation of amino acids derived from nitrogen compounds is released outside the microbial cells, and most of the ammonia is nitric acid and amino acid compounds and is reduced to the soil as it is, and plays a very large role as a nitrogen source for higher plants. do. This is why soils in which soil microbes survive in large quantities are called "fertility" in particular.

As such, the substances that are contained in the metabolites or secretions produced during the decomposition of the organic substances by the soil microorganisms include the following products that should be particularly noticed.

Complex groups of iron, aluminum, manganese, copper and other elements with corrosive substances are present in the soil. These compounds are classified into complexes in which each root is coordinated with the central ion and an attached product (chelate) in which the molecular center is slightly coordinated to the central ion. The chelate is present in the sludge and the caustic soda of the metabolite produced by polymerization. This chelate or chelate compound generally exhibits properties different from those of the original metal ion and ligand, and also exhibits remarkable catalytic or deodorizing action.

The corrosion process in which fresh nutrients such as plant and animal carcasses supplied from the ground are transformed into stable substances in the soil under the action of microorganisms under the anaerobic condition in which the soil, silicate exists is as follows: Begins by mineralizing its constituents first with carbon gas, water, ammonia and other forms. These components include degradation products (phenol compounds from lignin, tannins and other compounds) and metabolites (microbes as phenolic compounds are produced using carbohydrates), degradation products and recombinants (amino acids and peptides, , Or a metabolite of a microorganism).

The ring which is important for the formation of corrosive substances is the condensation of the structural unit, which is caused by the oxidizing action of the phenol oxidase type enzyme to convert phenol to quinone by semicuron or by the interaction of quinone with amino acid or peptide. This process is closely related to polycondensation, and various reactions proceed simultaneously.

In this way, the corrosion of the organic matter is caused by the presence of the silicate, which plays a major role in the regulation of metabolic function and metabolic function of the soil microorganism group, so that an aromatic constituent is produced and polymerized under anaerobic conditions, and finally, And its progress is a very complicated process related to the way in which silicate is involved, the metabolism of the microorganisms involved, or the phase change. The mechanism is not clear, but is generally referred to as corrosion reaction.

Corrosive material is a brown or black brown amorphous high molecular substance produced by polycondensation by repeatedly decomposing and synthesizing by the action of microorganisms such as copper and plants themselves.

Organic matter is fermented and decomposed by the microorganism from the easily decomposable part. At this stage, the species and density of the microorganisms involved vary, and degradation predominates over the entire process. Part of the degradation product is synthesized and fixed in the living body, but environmental organic matter is changed by the influence of waste products, secretions, and microorganisms themselves due to biological activity, and decomposed by the next generation of microorganisms.

Organic materials in which the same shape is repeated become various materials having high molecular weight and decomposition properties, and the kinds of microorganisms capable of decomposing and decomposing them are reduced, and they can not be used at certain stages. Then, the progress of the time course depends on the kind of the first organic material, the substances such as minerals existing in the surroundings, and the physicochemical conditions such as temperature, moisture and pH. Eventually, it proceeds in different microorganism and material state.

In the initiation stage of organic decomposition, microbial activity is strongly influenced by oxygen. Through the history of long evolution, microorganisms have mastered the technology of enduring the harmful effects of oxygen or using oxygen as the ultimate. Therefore, if oxygen is moderate, it does not interfere with the progress of corrosion, but rather it plays a role of over decomposition and conversion, transition of anaerobic condition, and C / N ratio adjustment. Therefore, when an artificial manipulation is applied, adjustment of oxygen according to conditions is very important.

The organic substances in the stage of transition of substances, organic matter, and water involved in corrosion, which are closely related to general copper and plant nutrient absorption, are called corrosion precursors.

In the initial stage, lactic acid bacteria, yeast, etc. are thriving through fermentation decomposition of organic substances which are likely to be decomposed and produce amino acids, sugars and various fatty acids.

At the latter stage, decomposition organic matter such as cellulose and lignin, metabolism products which are mixed with the initially degraded microorganisms, the residue absorbed in the general organisms, and the microorganisms themselves used in the early stage, and the products to be bound are mainly decomposed.

When the reaction proceeds further, polymerization is mainly performed by polycondensation rather than microbial action. Most of these substances are produced by the accumulation of these metabolites through the extinction and proliferation processes of the time-series microorganisms. Therefore, the function of coagulating and macromolecularizing organic matter is essentially reached to the highest level.

Substance changes at this stage are extremely slow, and at the final stage, there are hundreds of thousands of molecular weight stabilizers without active microorganisms.

The basic principle of the wastewater treatment method using soil microorganisms is that a mixture of silicate material and corrosive substance is added to and mixed with a contaminant to change the microorganism environment and induce activity of the soil microorganism group in a given environment, And to make the same type of change.

Therefore, it is necessary to make the microbial bacteria useful at the stage of the material condition of the initial corrosion precursor stage easy to work, and it is necessary that the corrosion precursor stage is formed in the same form and that the stage of the corrosion material is suitable for the wastewater treatment . This adjustment can be easily accomplished by the addition rate of corrosion precursors and corrosives.

Microbial function can be roughly divided into three types: environmental control function, nutrition function, and metabolic function. Each of these functions can be effectively used and at the same time organically linked to enable survival and prosperity as an individual or a colony of the initial microorganism.

The environmental coordination function refers to the external influences of the microorganism or colony on the environment to achieve a suitable environmental function in survival, and when the microorganism or colony reaches the extreme, it is expressed to function as an azimuth. The environmental regulation function seen in microorganisms is mainly caused by physical and chemical reactions between the metabolites released from microorganisms, and the external environment is not suitable for survival or prosperity of microorganisms, .

In terms of the optimum survival environment of microorganisms, organic matter and inorganic matter should exist in a state suitable for survival and prosperity of microorganisms.

On the other hand, corrosion precursors are collectively referred to as various organic substances, microbial metabolites including aromatic organic acid constituents, and substances in the process of changing into corrosion by the action of minerals. As a microorganism that contributes to the corrosion of organic matter, corrosion precursors can be regarded as the best environment material.

The environmental regulation function by microorganisms is expressed through the metabolites produced from microorganisms. At the same time, the corrosion precursors accumulating large amounts of metabolites including aromatic organic compounds contribute to the optimum environment by the microorganisms which contribute to the corrosion of the organic matter . The metabolites or corrosion precursors of the present invention are mainly aggregates of active substances and have immobilized and inactivating action of environmental marine substances and control and sterilization effect on some organized anaerobic bacteria and viruses, Permeability, and permeability.

Corrosion reaction is a process in which substances, microorganisms, and water all go together, and substances, microorganisms, and water that are present in the process are somewhat different, but have a property to maintain such state. The wastewater treatment method using soil microorganisms utilizes this property and is characterized by the effective use of corrosion precursors, corrosive materials and harmonized water thereof.

When the microorganisms are exposed to the optimal environment and other environments, the environment is first adjusted by the release of the metabolites. In the case of severe pollution, even in the case of potentially bacterium that performs microbial activity with excellent environmental purification function, it is killed or becomes sporadic if it releases the metabolite beyond the limit. Even if it is not wiped out, the density of microorganisms is decreased. It takes time until the microorganisms in a complex interrelated environment are structured in a certain order, and as many microorganisms as possible are subjected to microorganism activities having excellent environmental purification functions It is necessary to keep it.

Environmental conditioning by erosion preconditioning is initiated by chemical reactions between the organisms, including metabolites, and direct environmental changes are small for many species of bacteria at high densities while maintaining constant order within the precursors. Even if large changes occur, microorganisms can respond as a cluster and can respond by changing the distribution of microorganisms in nature.

As a result, there are two major features that have a large buffer for environmental changes and a large number of microbial reserve groups, which are easy to use and highly reproducible for this reason.

In order to induce and cultivate the soil microorganisms, the soil microorganisms in the treatment system must be maintained in the organic aromatic metabolites. Especially, the bacterial group (a group of bacteria that are symbiotic with the soil anaerobic group) that grows outside the system at the beginning of the target system and has enhanced aromatic constitutional metabolic function is used as a seed bacterium under a certain condition, A < / RTI >

In general, the use of corrosive substances as additives is stable and reasonable. In this case, the corrosive substance is collectively referred to as the corrosive substance including the metabolism and secretion of microorganisms, and in the case of a good treatment facility, the high quality corrosion sludge produced by the long-term operation treatment is used as the secondary purification substance.

Since the soil microorganism group exhibiting aromatic constitution metabolism is left in an artificial environment for a long time, it is converted into non-aromatic metabolism. Therefore, in order to avoid the denaturation and the addition of the inducing substance, the aromatic metabolism function of the soil microorganism group It is necessary to create an environmental condition.

The characteristics of the wastewater treatment method as a technique for applying and purifying the purification mechanism due to the corrosion of the organic matter to the wastewater treatment under certain conditions are as follows.

1) Types of bacteria that reproduce in the treatment system: Aromatic constituents A toxic aerobic unit showing metabolic function, complex bacteria of tuberous anaerobic bacteria

2) Increasing the reaction capacity of the treatment system: Polymerization, sludge formation and corrosion by the presence of silicate due to binding, granulation, agglomeration, condensation polymerization reaction by reaction of metabolites and organics increase the sedimentation ability of sludge .

3) Large volume load, facility, and device miniaturization: The treatment capacity for high concentration raw water is large and dilution of raw water is not necessary.

4) Wide range of processing temperature: 4 ~ 45C range of practical treatment is possible.

5) Prevention of odor from treatment facility: In each process of treatment (odor is not generated from the raw water stage when the contact between raw water and return sludge is good).

6) High concentration wastewater: High concentration wastewater such as high salinity (8%) and unique stakes can be treated without special facility or dilution, and can be efficiently reduced in the same way.

7) Generated sludge: The generated sludge has advanced chelate structure, and the amount of sludge is also reduced compared with the conventional treatment method, and also the water release is good, and various ion substances can be removed by chelation.

8) Physiological effects of sludge and treated water: Sludge and treated water can have physiological activity against organisms and antimicrobial action against germs (Escherichia coli, Salmonella, Staphylococcus, etc.) I do not.

In addition, a wastewater treatment device disclosed in Korean Patent No. 10-1027642, No. 10-0769039, No. 10-1397780, No. 10-0798411, No. 10-1384367, No. 10-0315875, etc. In this method, the bioreactor mainly blows air into the microorganisms to simply decompose, ingest, and remove the organic matter. Therefore, it is impossible to fundamentally reduce the odor characteristic of the wastewater, and the biochemical oxygen demand of the discharged water is better than the legal limit And there is a problem that a large-scale treatment facility paper must be secured.

It is an object of the present invention to reduce the odor peculiar to wastewater from the inflow stage of wastewater, to achieve better quality of treated water than the legal regulation value of biochemical oxygen demand (BOD) of discharged water quality, and to maximize the removal efficiency of nitrogen and phosphorus The present invention also provides a treatment method of high concentration odor wastewater using a soil microbial community capable of minimizing the amount of sludge generated during treatment.

The present invention relates to a method for removing nitrogen and phosphorus from a biological reactor, which is a wastewater introduced into a water collecting tank in a multi-bioreactor, wherein the microorganism layer is formed by multi- The sludge is transferred to a sludge storage tank. The final treated water is transferred to a treated water tank for discharge, and decomposition and nitrification of organic matter are progressed in the aeration tank. A method of treating a high concentration odor wastewater using a soil microbial community comprising the steps of: returning a portion of treated water to the multi-bioreactor, and returning a portion of the sludge from the membrane separator to the collecting tank and the multi-bioreactor, The reaction tank is equipped with an agitator, And a sludge conveyed from the aeration tank and the membrane separation tank is introduced into the bottom of the sludge tank and sequentially contacted with the liquid suspending and aerobic microbial sludge layers to form a first multi-organism And an electrode for supplying a direct current of a weak voltage to an air inlet pipe for supplying oxygen from the bottom to improve the decomposing ability of the microorganisms flowing upward from the first multi-bioreactor, A second multi-bioreactor for returning to the lower part of the multi-bioreactor; and a second multi-bioreactor having the same structure as the first multi-bioreactor and adjusting the separation interface between the microbial layer and the supernatant so as to perform biofiltration and adsorption, And a third multi-bioreactor for transferring the bioreactor to the aeration tank, By treating the sludge which is returned from the waste water flowing from the water tank and the aeration tank and the membrane separation tank it is characterized in that performing the high concentration of organic matter decomposition and denitrification process and the Gang Ex.

In addition, the present invention is characterized in that DC electricity of 25 to 45 V is supplied to the electrodes of the second multiple bioreactor, and is intermittently supplied while varying the voltage.

The present invention also relates to a method for preparing a membrane separation vessel, which comprises pulverizing silicate, corrosive material, elvan stone, pumice into 3 to 5 mesh size, introducing a solution of a water-soluble silicate and a corrosive acid in a weight ratio of 1: Thereby activating the corrosive reaction of the soil microorganisms contained in the sludge.

The method of treating a high concentration odor wastewater using the soil microbial community according to the present invention is advantageous in that it can reduce the odor generated in the collecting tank as well as the lower and wastewater generated in the entire treatment plant including the sludge storage tank, It is possible to remarkably reduce the characteristic odor and to treat the water quality regulation value of the discharge water of the wastewater as much as possible compared with the conventional treatment method and to maximize the removal efficiency of nitrogen and phosphorus which are the nutrients, The amount of surplus sludge generated can be remarkably reduced, and the sludge dewatering cake has the advantages of making good quality compost and reducing it to a soil conditioner.

1 is a systematic view showing one embodiment of a method for treating a high concentration odor wastewater using a soil microbial community according to the present invention.
FIG. 2 is a schematic diagram illustrating an embodiment of the multi-bioreactor shown in FIG. 1; FIG.

The present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIG. 1, when the wastewater (raw water) flows into the water collecting tank 10, air is blown into the wastewater to be agitated by the method of treating the odorous wastewater using the soil microbial community according to the present invention. At this time, a certain amount of the conveying sludge, in which the corrosion reaction is extremely activated in the membrane separation tank (16), also flows into the point where the wastewater flows. In the mixing state, the raw water and the transport sludge are homogeneously mixed and homogenized, and the corrosion reaction in which the decomposition of the organic matter in the raw water starts in the contact mixing starts.

The multi-bioreactor 12 comprises first to third multi-bioreactors 12-1, 12-2 and 12-3. In the first multi-bioreactor 12-1 of the first cylindrical structure, The agitated corrosive material and the corrosive corrosive substance conveyed from the water collecting tank (10) are supplied to the driving shaft while maintaining the uniformity of the length of the driving shaft at intervals of 1 m and the stirrer is operated at a high speed in the range of 10 to 20 rpm A predetermined amount of mixed high-concentration raw wastewater and the sludge conveyed in the membrane separation tank 16 are sequentially brought into contact with the inflow, flow-through, and aerobic microbial sludge layers from the bottom to cause biodegradation and adsorption. At this time, while the MLSS concentration in the tank 12-1 is maintained at 8,000 to 25,000 mg / l, the upward flow rate is considerably adjusted to the rate at which the microorganisms in the tank 12-1 precipitate and settle, The supernatant and the microbial layer are separated to form a weak interface. The wastewater thus brought in contact with the microbial layer is allowed to flow to the second multi-bioreactor (12-2) via the upper portion in a state of laminar flow. The second multi-bioreactor 12-2, which is a simple spherical structure, mixes aeration and aeration using the air inlet pipe 24, and is connected to the tank 12-2 through the positive and negative electrodes provided on the tank 12-2. The DC electricity converted into the weak voltage of 25 volts to 45 volts is applied to the internal cells in a variable and intermittent manner, and the degradation ability of microorganisms is enhanced by the stimulation. During this process, a certain amount is transferred to the first multi-bioreactor 12-1 and the rest is transferred to the third multi-bioreactor 12-3.

In the third multi-bioreactor (12-3), the same mechanical operation is performed as in the first multi-bioreactor (12-1), and the separation interface (26) of the microbial layer and the supernatant is provided to perform biofiltration and adsorption. And the supernatant is transferred to the aeration tank 14, which is the next processing stage.

When the concentration of the organic substance is not high, the first multi-bioreactor (12-1) directly bypasses the aeration tank (14) without using the second multi-bioreactor (12-2) .

The treated water of the multi-bioreactor 12 flowing into the aeration tank 14 is mixed with and contacted with the sludge conveyed in the membrane separation tank 16, so that decomposition of organic matter, that is, corrosion reaction, occurs actively under aerobic conditions. And the excess intake of phosphorus is concurrent. Therefore, since the aeration tank 14 operates at a high concentration of MLSS concentration of 8,000 to 10,000 mg / l, the sludge age is kept long and the density of the nitrifying bacteria having a slow growth rate is maintained high. In addition, since the growth rate of nitrifying bacteria is increased due to the effect of the growth promoting substance and the active substance, which are the metabolites of microorganisms contained in the activation of the corrosion reaction, in the sludge transported from the membrane separation tank 16 to the aeration tank 14, Naturally. In addition, when the aeration tank 14 is kept in aeration and aeration to maintain the aeration tank 14, the air diffusing pipe is used to prevent the sludge floc from loosely coagulated and condensed by using a micro- The aeration tank 14 is divided into two or three sections in order to increase the decomposition efficiency and to perform nitrification. The aeration tank 14 is subjected to a different aeration intensity and is transported from the downstream end of the aeration tank 14 to the front end of the aeration tank 14 by 250 to 400% (DO) concentration is maintained at 1 to 2 mg / l and the redox potential (ORP) is maintained at 200 mV to -150 mV at the shear stage and the dissolved oxygen (DO) concentration is maintained at 0.5 to 1 mg / The reduction potential (ORP) should be maintained at + 150mV to + 200mV.

The membrane separation tank 16 separates the wastewater transferred from the aeration tank 14 using solid-liquid separation using a separation membrane, and then the treated water having passed through the membrane is sent to the treatment water tank 20 to be discharged. A mixture of silicate and corrosive material (HUMUS), elvan stone, pumice in the size of 3 ~ 5mesh and activating the corrosion reaction in the mixed state, mixing water-soluble silicate and humic acid (HUMIC ACID) (10) to 20%, 20 to 30% to the multi-bioreactor (12), and 150 to 150% to the aeration tank (14) by supplying the sludge maximizing the corrosion reaction activity constantly at a rate of 100 to 200 mg / To 200%, and the remaining sludge is sent to the sludge storage tank 18. The MLSS concentration in the tank is maintained at 8,000 to 10,000 mg / l, the dissolved oxygen (DO) in the bath is 0.5 mg / l to 0.7 mg / l, the redox potential (ORP) is maintained at + 150 mV to +200 mV, The sludge ages are maintained in accordance with the design by controlling the amount of conveyance while continuously conveying the sludge. In addition, when the sedimentation tank is employed in place of the membrane separation tank 16, the sedimentation sludge conveyance function can be performed in the same manner.

The surplus sludge introduced into the sludge storage tank 18 is dehydrated so that the dehydrated cake is simply discharged or used as a soil improvement agent. In the sludge storage tank 18, the corrosion reaction is activated in the membrane separation tank 16, Since it contains a large amount of corrosive substances such as phosphorus growth promoting substance and active substance, it is transferred to the collection tank to promote the corrosion reaction of decomposing the organic matter of the wastewater.

The principle of removal of odor and high concentration organic matter, nitrogen and phosphorus by the above-described treatment method will be described in detail.

The membrane separator (16) is a place to improve and adjust the anaerobic microorganism, which is a soil microorganism, in addition to the solid-liquid separation function. The silicate and the corrosive substance (HUMUS), the elvan stone and the pumice cause the corrosion reaction and the water soluble silicate and the humic acid ACID) to maximize the corrosion activity, maximizing the concentration of the metabolite having polyphenolic aromatic nature, dissolving the inorganic substance and continuously supplying it to the treatment process to maintain the concentration of the microbial metabolite, (Soil) response of the plant. Therefore, the water-soluble organic matter is decomposed and re-synthesized by a special (soil) microorganism group that secretes a metabolite containing a compound having a polyphenol aromatic nature. In this process, the chelated organic matter and the Metal alkaline earth metals and the like, and organic and inorganic compounds.

This soil microbial group is adsorbed and bound to the soil microorganism group from high concentration organic matter and nutrients such as odorous substance, nutrients, and nutrients from the sewage tank into which the wastewater is introduced through the return, It is removed through biodegradation reactions such as polycondensation, oxidation and reduction.

In the state where odorous substances such as ammonia, methyl mercaptan, hydrogen sulfide and the like are mainly present in the ion state, wastewater flows into the water collecting tank (10), and the sludge conveyed in the membrane separating tank (16) The reaction starts to be activated. The transport sludge contains a large amount of microbial metabolites, such as growth promoting substances and active substances, especially chelates and chelate compounds, and the corrosion of the wastewater is activated to collect the odor ions as chelate constituent molecules, It is possible to eliminate the odor without using a separate facility. Such a removal mechanism is performed in the pretreatment process, and thus the odor of the entire treatment plant including the sludge storage tank 18 and the dehydration facility, which cause a great deal of odor problems, is fundamentally reduced.

In addition, the organic matter is firstly decomposed in the multi-bioreactor 12, and the secondary decomposition is performed in the aeration tank 14, so that the remaining organic matter is corroded. Thus, the corrosive matter contained in the return sludge of the membrane- It returns to the front of the water collecting tank (10), which is the inflow point of the raw water, and mixes and contacts with the organic material in the raw water, thereby changing the artificial environment and maintaining the same as the natural environment in which the corrosive material exists, thereby causing corrosion of the organic material occurring in the natural environment ecosystem. That is, in the first multi-bioreactor (12-1), the wastewater containing a high concentration of organic matter is subjected to a direct decomposition treatment without using an impact load and is also used as a carbon source for denitrification of nitrogen in the first multi- ), Aerobic microorganisms are consumed in excess of phosphorus and used as a nutrient source for the growth of soil microorganisms and decompose the remaining organic matter. Further, in the second multi-bioreactor (12-2), electricity is energized in the microbial cells, thereby promoting the activation of the microbial cells. This is because of the effect of the magnetic field and the electric field due to the conduction of the DC current, So that the removal efficiency is maximized relatively.

In addition, nitrogen and phosphorus are passed through three stages of multi-bioreactor (12) in which a homogeneous and aerobic microorganism layer is formed. At the same time, denitrification and phosphorus release are performed at the same time as the first high- The sludge conveyed from the membrane separation tank 16 and the sludge conveyed from the downstream end of the aeration tank 14 are simultaneously introduced into the bioreactor 12-1 so that the sequential contact between the raw water and the microorganisms is carried out, Nitrogen is transported to the membrane separation tank 16 and the downstream end of the aeration tank 14 is denitrified using the carbon source of the wastewater and is removed, In this process, the corresponding organic substances are simultaneously removed and collected as a lead chelate compound to be removed and released. In the aeration tank (14) and the membrane separation tank (16), phosphorus is removed by excess sludge drawing after the excessive consumption of phosphorus. Since the multi-bioreactor (12) uses molecular oxygen in the raw water, the operation amount of the air blower is reduced because the amount of air required is very small, and dilution of the wastewater is not necessary because the treatment can be performed regardless of the organic substance concentration of the wastewater. The amount of sludge generated is extremely small and the amount of sludge generated is considerably reduced. The discharged sludge is stabilized without generating odor because it becomes corrosive.

The results of comparison between the present invention and the representative activated sludge process and A2O process of the conventional process are shown in Table 1 below.

Item unit Classification by public law Standard activated sludge A2O Invention Remarks F / M ratio kgBOD / kgMLSS 0.2 to 0.4 0.15-0.25 0.5 to 0.7 MLSS concentration mg / l 1500 ~ 3000 3000 ~ 5000 8000 ~ 12000 Sludge residence time day 5 to 15 4 to 25 30 ~ 45 1-2 The first multi- Anaerobic hr - 0.5 to 1.5 0.5 to 1 The second multi- Anoxic tank hr - 0.5 to 1.5 1-2 Third multi-bioreactor Aeration tank hr 6 to 8 3.6`6.0 4 to 6 1-2 Membrane separation tank Sludge return rate % 30-100 20 to 50 150 ~ 200 Recycling rate % 60 to 200 100 to 300 300 to 400

As shown in Table 1, the first to third multi-bioreactors 12-1, 12-2, and 12-3, which have high treatment efficiency to treat the high concentration organic wastewater at a high F / M ratio and are capable of direct inflow without dilution, 12-2, and 12-3), it is possible to reduce the total sludge disposal cost by eliminating the need for a chemical treatment process and thus reducing the facility cost of the entire treatment facility and the resulting drug sludge generation amount, Since the sludge was a sludge which had undergone the corrosion reaction, it was possible to achieve a clean environment since no odor was generated.

In the second multi-bioreactor (12-2), the activation of the degradation function of the causative organism and the aerobic microorganism is maximized by the direct current injection of weak voltage, thereby improving the efficiency of the denitrification function including decomposition of organic matter, thereby improving the treatment efficiency .

In addition, it is possible to directly modify, adjust and proliferate the soil microorganisms in the membrane separation tank 16, and it is not necessary to separately form a separate growth and culture tank. And it was easy to secure the stabilization of the treatment plant.

When the present invention is applied to a wastewater treatment plant to remove nitrogen and phosphorus, it is possible to achieve the desired purpose by converting the functions of the existing facilities without adding the advanced treatment facilities, and it is also possible to reduce the root- .

In the present invention, DC electricity of 24 to 45 V is supplied to the second multi-bioreactor (12-2) in order to secure safety against electric shock. The reason for supplying the voltage variable and intermittently is not constant for microorganisms And it is intended to improve the decomposition ability of the organic matter inherent in the microorganism by continuously changing the stimulus.

In addition, in the present invention, the reason for limiting the silicate, the corrosive substance, the elvan stone, and the pumice to the size of 3 to 5 mesh is to prevent the shortening of the dissolution time and the degradation efficiency of the organic material.

In addition, in the present invention, the weight ratio of the water-soluble silicate and the corrosive acid is 1: 1 and 100-200 mg / l is put in order to keep the soil microorganisms functioning continuously.

10. . . Sump tank
12. . . Multiple bioreactor
12-1. . . The first multi-
12-2. . . The second multi-
12-3. . . Third multi-bioreactor
14. . . Aeration tank
16. . . Membrane separation tank
18. . . Sludge storage tank
20. . . Treatment tank
22. . . Dehydrator
24. . . Air inlet pipe
26. . . Separation interface between microbial layer and supernatant

Claims (3)

The raw water which is wastewater flowing into the water collecting tank (10) is contacted with the microorganism in a state where the microorganism layer formed by multi-layered with a homogenous or aerobic microorganism in the multi-bioreactor (12) is decomposed to remove nitrogen and phosphorus And is transported to the aeration tank 14. The decomposition and nitrification of the organic matter are promoted in the aeration tank 14 and transferred to the membrane separation tank 16 to transfer the filtered sludge to the sludge storage tank 20, And a part of the treated water having undergone decomposition and nitrification of organic matter is conveyed to the multi-bioreactor (12) in the aeration tank (14), and a part of the sludge is discharged from the membrane separation tank (16) (10) and a multi-bioreactor (12), wherein the multi-bioreactor (12) is equipped with a stirrer A certain amount of wastewater flowing from the water collecting tank 10 and a sludge conveyed from the aeration tank 14 and the membrane separating tank 16 are introduced into the bottom of the anaerobic microorganism sludge bed, A first multi-bioreactor (12-1) for performing biodegradation and adsorption by contacting the first multi-bioreactor (12-1), an air inlet pipe (24) for supplying oxygen from the bottom, and an electrode A second multi-bioreactor 12 - 1 for improving the decomposition ability of microorganisms flowing upward from the first multi-bioreactor 12 - 1 and returning a predetermined amount to the lower portion of the first multi-bioreactor 12 - 2 and the first multi-bioreactor 12-1 so that the separation interface 26 between the microbial layer and the supernatant is maintained so as to perform biofiltration and adsorption, And a third multi-bioreactor (12-3) for transferring the wastewater flowing from the water collecting tank (10) and the sludge conveyed from the aeration tank (14) and the membrane separation tank (16) Wherein the high concentration organic matter decomposition treatment, the denitrification and the desorption are carried out. [2] The method according to claim 1, wherein a DC voltage of 25 to 45 V is supplied to the electrode of the second multi-bioreactor (12-2) while being intermittently supplied while varying the voltage. Disposal method of odor wastewater. The method according to claim 1, wherein the membrane separation vessel (16) is pulverized into silicate, erosion material, elvan stone, pumice in a size of 3 to 5 mesh, and the mixture is mixed with water-soluble silicate and corrosive acid at a weight ratio of 1: And 100 to 200 mg / l, thereby activating the corrosive reaction of the soil-borne microorganisms contained in the sludge.

Images