KR970002486B1 - Apparatus and method for waste water treatment - Google Patents

Abstract

Sewage and waste water inflow through a inlet pipe(18), earthy componants and large floating materials are eliminated in a sedimentaion tank(1) and on a bar screen(6) and sent to a balancing tank(4). Inflowed sewage and waste water are reacted with a sludge contg. soil micro- organisms which is recycled from a cultivation tank(11) and sent to the aeration tank(7) through a drum screen(6) by a motor(5). lnflowed sewage and waste water in an aeration tank(7) are reacted with a solid-liquid separated sludge in a sedimentation tank(8) with a sludge cultivated in a cultivation tank(11) by the compressed air of diffuser(13) to make the activation of soil micro-organisms. Metabolic product from micro-organisms and dissolved contaminant are coagulated, condensed and sent to a sedimentation tank(8) to separate water from a solid.

Description

Wastewater Purification Method

1 is a plan view showing one example of an apparatus for explaining the treatment method of the present invention.

2 is a longitudinal cross-sectional view of FIG.

3 is an enlarged cross-sectional view of a culture tank used in the method of the present invention.

* Explanation of symbols for main parts of the drawings

1: sedimentation tank 4: raw water adjustment tank

5: drum screen 7: aeration tank

8: settling tank 11: culture tank

13, 14: acid generator 15: submerged reactor

17 terrestrial reactor 19 outlet

The present invention relates to a method for purifying organic wastewater.

In the related art, various processes such as activated sludge method, which are mainly biological treatment methods, long-term aeration method, catalytic oxidation method, sprinkling water phase method, and rotational disc method, are used to proliferate and culture aerobic microorganisms to decompose organic matters. These treatment methods require a second settling tank as well as a huge aeration tank to culture aerobic microorganisms by removing suspended solids from wastewater from the first settling tank and maintaining dissolved oxygen at 0.3 to 1.0 ppm. It is large in size and structurally complex.

In addition to the various issues listed,

① The capacity of the primary sedimentation tank to remove suspended solids entering the wastewater should be at least 6 hours of the inflow amount, and many attached equipments should be installed to lift and remove sedimented suspended solids. Odor is released as corruption progresses, polluting the surrounding environment,

② In the biological treatment method by microorganisms, even if the microorganisms are cultured after a certain time passes in a certain volume, the cultured microorganisms are a process of decomposing, fermenting, and oxidizing organic substances dissolved in wastewater. And malodor caused by mercaptoic acid and the like,

③ Most of the sludge produced by the treatment method is an undecomposed organic substance, and in order to decompose and digest it, a digester for about 30 to 60 days must be installed, and an organic polymer or ferric chloride, etc., is used to dehydrate the digested sludge. By inputting flocculant and dehydrating, it is not only expensive to maintain, but also dehydrated sludge produces pollutants that are difficult to treat such as farmland reduction and soil pollution.

④ Organic wastewater purified by biological treatment method does not decompose organic matters completely and increases water pollution by eutrophicating the water quality of discharged water system under the influence of residual nitrogen and phosphorus (P) compound. This is the lighting that requires a tertiary treatment facility for wastewater to resolve.

The present invention has been made to solve the above problems, for example, by removing the suspended solids by installing a drum screen in the primary settling tank to eliminate the large sized settling tank and the large-scale aeration facilities can be reduced and utilized as aeration reaction facilities.

Accordingly, in the present invention, the decomposition process, which is the source of the conventional biological treatment method, is converted into a complex polycondensation reaction by the excretion of microorganisms, thereby fundamentally eliminating odor generation emitted from wastewater treatment, and extinguishing the sludge produced. The sludge is stabilized without the need to install soils, and the soil can be reduced or recycled, and the remaining pollutants in the treated water can be minimized without adding a separate tertiary treatment facility to remove the factors of eutrophication. The main purpose is to provide a method for treating organic wastewater.

The treatment method of the present invention removes the solids suspended in the sewage from the drum screen of the pretreatment process, and the dissolved contaminants in the sludge containing sludge containing the cultured soil group in the reactor and culture tank of soil group Soil bacteria are excreted by returning them to control tanks and aeration tanks to allow them to multiply and be activated in the tanks. They are combined with metabolites and contaminants in the dissolved state to form macromolecules, aggregates, condensation, and condensation. By inducing the reaction to be decomposed and transferred to the sedimentation tank and separating the solids from the sedimentation tank, the contaminants dissolved in the waste water are denatured into corroded sludge and the supernatant (上等 液) is the contaminant is separated into a very small amount of water, each of which is a complete treatment of waste water.

The treatment apparatus of this invention is comprised from a raw water adjustment tank, an aeration reaction tank, a precipitation tank, and a discharge tank. Among such configurations, the characteristic configuration is the installation of a terrestrial reactor.

The culture tank of soil group is a device that creates the environment that is close to the natural environmental conditions in the soil where the bacterial group can be best cultured and grows in peat or humus soil compressed into irregular masses, cylinders, spheres, etc. Alternatively, the soil sludge produced by the organic sludge produced during the purification process was attached to the water and above the ground by attaching a reactor filled with silicate with pumice, zeolite, or ganbanite with crushed stone. The sludge and contact reaction is configured to infuse soil-like bacteria into culture while injecting air in the state of fluid. It is configured to culture and propagate soil bacterial groups initially cultured in the reactor. Soil bacterial groups initially cultured in the reactor are configured to be sent to the culture tank, whereby a large amount of precipitate sludge and contact culture are added. The growth of soil group in the culture tank is carried out when the sludge concentration is about 5.000 PPM while injecting aerobic air, and the activated activated sludge is controlled by the automatic control pump. Simultaneously with the return to the reaction tank, the sludge precipitated in the sedimentation tank is taken out to maintain the sludge concentration in the culture tank, and the culture growth of the soil bacterial group is continuously repeated.

Soil bacterial group contained in the inflow point of waste water and sludge returned to the control tank aeration reaction tank is mixed, contacted, incubated, and multiplied by the incoming waste water and compressed air of the acid tank installed in the control tank and the aeration reaction tank. It is a device in which a reactor is installed in a culture tank capable of promoting the discharge of metabolites to be excreted.

[Problem to Solve Invention]

① As described above, in the biological purification treatment method of waste water, the dissolved oxygen is purified by aerobic microorganisms and the waste water is treated by the aerobic microorganism. Therefore, the dissolved oxygen must be maintained at least 1PPM in the aeration tank. If it is insufficient, the aerobic microorganisms in the aeration tank is reduced and anaerobic microorganisms are increased, causing confusion in the treatment system, and it takes a considerable time to reduce them back to aerobic state. Since the microorganism is a breathable soil microorganism or a group of soil microorganisms, the dissolved oxygen in the aeration reactor is normally operated at a level of 0.1 PPM. Below Soil bacterial group itself is reduced to rest state without dying and then supplied with aeration air. Soil bacterial group is activated and releases metabolites, so that it can be combined with dissolved organic matter and physicochemical combination, coagulation, polycondensation, etc. Because of the complex reaction of the macromolecules, the macromolecules become high and the liquid is separated, so there is no abnormality in the purification process even if the dissolved oxygen level is temporarily reduced in the aeration tank.

In addition, since there is no decomposition process in the wastewater purification process, there is no odor or gas emission, and there is no need for facilities to prevent corrosion and odor of peripheral devices due to gas, and a huge aeration facility to keep dissolved oxygen in the aeration tank above 1PPM is reduced. .

② As the aerobic microbial group by the conventional activated sludge method decomposes and purifies the organic matter in the dissolved state, the remaining organic matter and the dead bodies of the aerobic microbial group which are not decomposed are produced as precipitate sludge. In order to stabilize it as a highly activated organic substance, a digestion tank for 30 to 60 days of the generated sludge is installed forcibly digested, but in the present invention, the sludge separated from the solid and liquid in the precipitation tank is corroded and stabilized. Because it is a hardly decomposable state, it does not need a separate extinguishing treatment facility, and even in the dehydration process of high and liquid separated sludge, the sludge itself is corroded and stabilized and is edible, so that an organic polymer or inorganic flocculant is added separately. Dehydration treatment is easy even if the sludge treatment costs are greatly reduced.

③ Even though the existing wastewater treatment plant is in normal operation, the pollutants are not completely removed and the residual amount of organic matter is more than BOD 20PPM, and a large amount of nitrogen (N) or phosphorus (P) compound is left untreated. For treatment, tertiary treatment facilities such as a large scale chemical treatment and anaerobic additional treatment facilities should be installed, but in the present invention, soil microorganisms cultured by the advanced function of culture and propagation of soil microorganisms or soil microbial groups. The metabolites excreted by the group or soil group and the contaminants dissolved in the wastewater are macromolecules by complex physicochemical reactions such as cohesion and polycondensation, and solids (sludge) in the process of liquid separation. It is economical, efficient and safer than tertiary treatment without the need for a separate tertiary treatment facility. Treatment of waste water it is possible to secure the quality.

(BOD 10PPM or less, N, P 70% or more removed)

[Means for solving the problem]

When explaining the present invention in detail to achieve the above object, the organic waste water is a glass treatment process, such as the sedimentation tank, adjustment tank, aeration reaction tank, sedimentation tank, discharge tank is installed in addition to the cultivation tank and the sludge produced in the sedimentation tank is automatically adjusted Filled materials such as amorphous bulk, cylindrical, spherical, etc. manufactured by transporting through the pump and drying the sludge of organic wastewater treated by peat or humus soil or soil bacterial group in and out of the culture tank to be easily dissolved in water. A reactor (BIO-REACTOR) filled with pumice, zeolite and elvanite crushed stone containing silicate and siliceous is installed and the sludge stored in the culture tank is automatically controlled while supplying air to keep the reactor and the culture tank breathable. Incubate for 12 hours by injecting into the reactor through a timer. The control device and the automatic pump repeatedly inhale and convey the sludge in the culture tank so that the sludge in the culture tank is cultured into soil, and the sludge cultured with the bacteria is transferred to the wastewater inlet, the control tank, and the aeration tank, and the wastewater treatment system Wastewater flowed into the whole causes metabolic products excreted by soil bacterial group to combine physicochemical reactions such as binding, flocculation and polycondensation, promotes liquid separation, and introduces wastewater that is separated by liquid into sedimentation tank. By separating the solids and completely purifying the organic wastewater. The supernatant is discharged and the precipitated sludge is characterized in that it has a structure to be returned to the culture tank, the adjustment tank, and the aeration reaction tank.

In addition, the treatment tank adjustment tank, aeration reaction tank and the like is provided with an air dispersing device for supplying air in a ventilated state installed for the purpose of promoting the mixed contact of the transport sludge and cultivation of soil bacteria.

[Action]

The organic wastewater introduced into the control tank and the aeration reaction tank is mixed and stirred by the compressed soil which is discharged from the soil group and the acid organ contained in the sludge returned from the settling tank and the culture tank, and the culture growth of the soil microorganism group and soil group At the same time, metabolic products excreted by soil bacteria and contaminants dissolved in raw water are combined, agglomerated, and polycondensate to induce complex physicochemical reactions in the aeration tank for a certain period of time and then transfer a certain amount to the settling tank. Solids and supernatant are separated by solid and liquid separation function using hydraulic structure in sedimentation tank, and supernatant is stabilized high quality treated water with little residual contaminants. The detection is reduced, tasteless and non-corrosive, so it can be used as heavy water after sand filtration.

The sludge sedimented in the lower part of the sedimentation basin, and the sludge separated from the liquid is transferred to the culture tank, the adjustment tank, and the aeration tank through the suction pump, which contributes to the growth of the soil bacteria group, and when the sludge concentration of the culture tank or the aeration tank increases, the sludge concentration tank is dehydrated The dehydrated liquor is transferred to an adjustment tank, and the dehydrated sludge is dried and recycled to the culture reaction of soil bacteria. In this process, there is no decomposition process of organic pollutants, so there is no odor generation, no dehydration facility installed in the dehydration facility, and because the sludge is densely corroded, the dehydration effect is excellent and there is no fear of secondary pollution. It is characteristic.

In the culture tank, porous materials such as pumice, zeolite, and ganbanite containing packed and siliceous powders and siliceous compacts in the state of poor dissolution and sludge produced by the action of peat or humus soil or soil bacterial group When the reactor (BIO-REACTOR) is installed and mixed with crushed stone, and the sludge introduced from the sedimentation tank is reacted with the filler filling the reactor while supplying air in the air, the soil bacterial group is cultured. Sludge, including the cultured soil culture group in the culture tank, is returned to the sedimentation tank, the adjustment tank, and the aeration tank, and becomes large molecules in contact with the incoming wastewater, and the liquid separation proceeds.

When the sludge concentration in the culture tank is increased, the amount of inflow sludge is controlled to maintain the sludge concentration in the culture tank. In addition, sludge produced by the action of peat or humus or soil bacterial groups may be directly administered to promote the culture growth of soil bacterial bacteria in the culture tank.

EXAMPLE

Hereinafter, preferred embodiments of the present invention will be described in detail by the accompanying drawings.

In FIG. 1 and FIG. 2, wastewater flows in through the raw water inlet pipe 18, while soil components contained in the raw water bottle are removed from the bar-screen (2) and (3). It flows into the raw water adjustment tank 4.

The wastewater introduced into the raw water adjustment tank 4 is mixed with the sludge containing the soil bacterial group returned from the culture tank 11 and passed through the drum screen 6 by the motor 5 to the aeration reaction tank 7. do. The drum screen 6 is a device that automatically removes fine suspended matter suspended in the waste water, and replaces the function of the conventional first settling basin (6 hours of holding capacity).

The wastewater introduced into the aeration reaction tank 7 is collected in the sedimentation tank 8, and the compressed air of the air dispersing device 13 is a part of the sludge separated from the liquid and the sludge transported by culturing the soil-like bacteria group in the culture tank 11. By stirring and mixing, the soil bacteria group is activated to release metabolites. Metabolites discharged from the soil group and contaminants in the dissolved state lead to coagulation, binding, and polycondensation reactions, and become macromolecules, which are transferred to the settling tank (8), and liquid separation is induced.

The dissolved acid tank in the aeration reaction tank maintains 0.1 to 0.3 ppm and the sludge concentration is about 3,000 to 5,000 ppm. It is characterized by no divergence.

In the sedimentation tank (8) is formed in the aeration reaction tank (7) to separate the solids and water (supernatant) of the macromolecular soluble material solids are settled quickly in the bottom of the sedimentation tank due to the rapid sedimentation rate to the macromolecularized sludge state The supernatant is introduced into the discharge tank 12.

The precipitated sludge is returned to the culture tank 11 and the aeration reactor 7 or the raw water control tank 4 by an automatic operation pump to be an accelerator for the continuous culture of soil bacteria.

In this process, when the sludge concentration of the aeration reaction tank 7 increases, the amount of returned sludge is reduced, and the excess sludge is transported to the sludge concentration tank 10 for dehydration treatment. Conventional technology is digested sludge, but the present invention is characterized in that the sludge is already corroded, so that it can be dried without digestion and reactivated as a culture batch or soil modifier of organic wastewater treatment. .

The culture tank 11 of the present invention is composed of an acid device 114, a BIO-REACTOR (15) and a terrestrial reactor (BIO-REACTOR) (17), a device for cultivating soil bacteria group Its function is to contact the soil with the bacterial group cultured in the reactor (15) and (17) while intermittently supplying the air in a ventilated state to the sludge introduced into the sludge which is separated from the sedimentation tank. While culturing the fungal group continuously, half of them are returned to the aeration reactor (7) and the raw water adjustment tank (4).

The function and role of the reactor (BIO-REACTOR) as a culture matrix of the initial or constant soil bacterial group in the wastewater treatment process is the artificial construction of the soil environmental conditions. The steam reactor 15 is a container having a structure in which it is easy to contact with surrounding slurries, and there is an air injection device at the bottom of the container, and inside the container, organic wastewater purified by the action of peat or humus soil or soil bacterial groups present in these soils. Soil bacteria in the sludge in a culture tank filled with amorphous masses, cylinders, spherical fillers, and the same amount of pumice, zeolite, and elvan rock containing siliceous materials. And the ground reactor (17) is installed outside the culture vessel, and its configuration is an automatic air supply device in which the same packing material as the steam reactor is built in a certain container and the aeration state can be maintained in the lower part of the container. Automatic sludge inlet / outlet pump is installed and the sludge drawn from the incubator is ventilated for 12 hours in the reactor. Soil fungi are cultured by air supply. Cultivated sludge is transferred to the culture tank and at the same time the oriental sludge is introduced and repeated in the same manner and plays a fundamental role in the culture growth of the soil bacterial group in the culture tank.

[Special functional effects during operation]

In the process of purifying organic wastewater, it is a process of growing and dissolving organic matter dissolved in wastewater into aerobic microorganisms, decomposing and purifying them and precipitating and separating the residues. In order to prevent the pollution of water, huge facilities such as huge fire extinguishing, dehydration of digested sludge, and incineration of dehydrated sludge are needed to prevent secondary pollution of the produced sludge. Was not completely decomposed, the water quality of the purified treated water was unstable, so a tertiary treatment facility had to be added. Since the purification process of organic wastewater is a decomposition process, odors are emitted during the decomposition of soluble organic matters. Many facilities that cause pollution to the environment and natural environment, and to prevent odor Wateuna In parallel, the state does not see the full resolution.

A special technique of the present invention is to culture the contaminants dissolved in the wastewater to grow a group of breathable soil bacteria to combine, agglomerate, polycondensate, macromolecularly, and separate the feces and soluble substances they excrete. Because it is not a decomposition process, there is no odor emission and because it is not an aerobic microorganism cultivation process, a large amount of air supply facilities can be reduced. It is a simple facility scale that incubates culture water and transfers it to the inflow, control and aeration reaction tanks of wastewater to induce contact reaction with the wastewater.In addition, the high and liquid-separated treated water minimizes the remaining contaminants and the precipitated solids are corroded. Because it is stabilized, dehydration efficiency is good, no extinguishing treatment is required, and it can be recycled.

The culture propagation method of the cultured soil bacteria group having a pivotal function in such a purification process will be described as the main function of the present invention.

The humus distributed on the surface of the earth itself has a function of humus soil organic matter. This is a function of the fungal soil microbial bacteria contained in the humus soil.

By this principle, the earth will continue to form and will continue to form. Humus and peat are homogeneous and indispensably correlated with the earth's original constituent silicon. Humus and peat will be inhabited by soil-like bacteria, which are breathable or near-breathable microbial bacteria, and their functions are applied to the organic denaturation in organic wastewater. will be. In other words, given the conditions close to the soil environment, the soil fungi group will be cultured and the metabolites will be naturally discharged when the soil fungi group is reproduced. In the mixed environment of pumice or peat and silicon containing pumice or ganban stone and zeolite, the air supply in the tungsten state is the most active culture growth of soil bacterial group. To put this into practical use, peat or humus soil is formed into granules of compressed amorphous mass, cylinder, sphere, etc., for sparing use, and it is inserted and filled in pumice containing zeolite or zeolite, elvan, etc. Continued intermittent aeration while contacting causes the bacterial population to grow. At this time, as a method of confirming the culture propagation, the cultured sludge has an earthy smell, and when it is mixed and mixed with organic wastewater, aggregation, binding, and polycondensation occur. Precipitating and separating the waste water which is polycondensed and solidified, the supernatant liquid is almost no residual organic matter and is stabilized and is not broken, and the sludge is also corroded and is not broken and stabilized.

In the above process, the purification function of waste water is solidified and liquid-separated for the polycondensation reaction between the excreta of the soil group and the organic matter in the dissolved state, and the organic matter is corroded to purify the pollutants of the organic waste water and the residual sludge is stabilized. It is a treatment method that seeks perfect purification without causing secondary pollution. It is a feature of the present invention that the culture propagation of the soil bacterial group which constitutes the main function of the purification function is possible by mixing with peat or humus and pumice, zeolite, elvan and the like for a certain time in a state of contact with organic sludge and aerated aeration.

[Result of invention]

As described above, in the present invention, the treatment structure and the treatment process of wastewater consist of only the sedimentation adjusting tank, the dream screen, the aeration reaction tank and the sedimentation tank, and the discharge water tank, and the large structure of the primary sedimentation battery is eliminated as well as the sedimentation adjusting tank and the aeration reaction tank. The sludge containing the soil bacteria group cultured in the culture tank is returned by the automatic operation stool and mixed contact with a small amount of compressed air in a breathable state, and the soil bacteria group promotes the growth and activation, and is dissolved in the excreta and waste water of the soil bacteria group. Since the contaminants are polycondensation macromolecules to induce high liquid separation, there is no decomposition process in the wastewater purification process, no odor generation at all, and no aerobic treatment. The sludge produced by the liquid separation is stabilized because the organic material is corroded, so that no separate deodorization facility and an additional deodorization facility are required, and the introduction of the polymer flocculant during the dehydration process is minimized. The sedimented and treated water has almost no residual pollutants, so the chlorine ash sterilization process is excluded, the generation of THN (trihalomentane) is suppressed, and the tertiary treated water quality is secured and stabilized. It is possible to use in the middle.

Claims (4)

Contacting organic sludge in a culture tank having a reactor containing a filler and an acidic device to obtain soil bacterial grouped sludge, and returning the soil bacterial grouped culture sludge to a raw water control tank and an aeration reaction tank, which are pretreatment systems, to waste water. In the method for purifying water, the culture tank 11 includes an internal submerged reactor 15 and an external ground reactor 17, and both reactors 15 and 17 are peat, humus or soil bacteria. Filled by mixing the sludge produced by the action of the group with the pumice, zeolite or crushed rock of siliceous, zeolite or ganban stone is filled, and in the aeration reaction tank (7), the solid wastewater and the sedimentation tank (8) are separated into solid and liquid. Part of the sludge and the sludge conveyed by cultivating the soil group in the culture tank 11 is the sludge concentration, 3,000 ~ 5,000PPM, dissolved oxygen 0.1 ~ 0.3PPM A method for purifying wastewater, characterized in that it is stirred, mixed and reacted by compressed air. The method according to claim 1, wherein the filler is an amorphous mass, cylindrical or spherical filler and siliceous containing the same amount of the compressed and solidified sludge of the organic wastewater purified by the action of the soil bacteria present in the soil in a poorly soluble state A process for purifying wastewater, characterized in that it is crushed stone of pumice, zeolite or elvan. The method of claim 1, wherein the raw water adjustment tank (4) is provided with a drum screen (6) to filter out 35% of the incoming contaminants. The method for purifying wastewater according to claim 1, wherein the culture sludge returned to the raw water adjustment tank (4) and the aeration reaction tank (7) is 1/2 of the capacity of the culture tank (11).