JP5286475B2 - High concentration wastewater treatment system - Google Patents

Description

The present invention relates to a high-concentration wastewater treatment system that achieves high-performance biological treatment utilizing the interaction of natural microorganisms.

Conventionally, biological treatment methods used in wastewater treatment technology are many activated sludge methods in biological treatment, and are actually implemented.

The activated sludge method mainly uses aerobic bacteria, consumes dissolved oxygen, reduces the molecular weight of organic matter while repeating cell culture, and decomposes it into water, carbon dioxide, nitrogen, phosphorus, and the like. On the other hand, in the anaerobic bacteria utilization field, when dissolved oxygen disappears, bacteria utilizing the oxygen of nitrate ion NO ₃ ⁻ also act and decompose into nitrogen gas and oxygen. In addition, it is detoxified by microorganisms using hydrogen sulfide H ₂ S as a reducing agent, and is also effective in reducing sludge by cutting off odor. Therefore, an example in which aerobic treatment and anaerobic treatment are used in combination has also been proposed (Patent Document 1).

In the activated sludge method in the conventional biological treatment, if the growth of the microorganism group corresponding to the amount of inflowing organic matter is not sufficient, it becomes a dilute biological tank. In that case, the molecular weight in the tank does not progress and the number of protozoa also decreases, causing a bulking phenomenon in the sedimentation tank. For this reason, floc sedimentation by adding a flocculant is measured. When the circulatory function of microorganisms works, enzymes emitted by fungi can collect sludge and flock it. It is metazoans that terminate and sink their activity, and the sedimentation rate is fast and dense. Circulation by the food chain between microorganisms is the most important, and if a part of it is missing, the whole will be adversely affected and the ability to respond is weak, making it impossible to adapt to the environment. Many chemicals for pH adjustment are used everywhere in the tank. In the case where the mutual culture action of microorganism groups that normally operate smoothly has been established, there is the ability to create a pH environment in which microorganisms can easily act even if the pH is slightly high and low, and no chemical solution is required.

In addition, there is a proposal to use a natural ore filter medium as a sprinkling filter for the purpose of combined use of aerobic bacteria and anaerobic bacteria, and a method for promoting the interaction of microorganisms in biological treatment is described (Patent Document) 2).

Patent Document 2 is established in a form in which the upper part of the tank is opened when the biochemical oxygen demand BOD of 3,000 ppm is lower than the inflow wastewater. In this system, when the opening is closed, the circulatory function of microorganisms is largely lost. When the balance in the food chain is lost, the entire biological treatment is affected, the ability to adapt to load fluctuations is lost, and the mixture suspended matter concentration MLSS becomes extremely thin. Therefore, there is a problem that high-concentration waste water treatment consisting of BOD 3,000 ppm to 30,000 ppm becomes impossible.

  JP-A-2005-137969   JP 2003-326289 A

Literature, management management of septic tank Supervision: Ministry of Health and Welfare, Health Sanitation Bureau, Water Environment Department, published in April 1985 Sprinkling filter bed design volumetric load factor standard P219, BOD volumetric load 0.6kg / m ³ . Daily filter medium load factor standard P207, BOD filter medium load 0.1-0.7 kg / m ³ . Comparison of daily processing capacity

In the wastewater treatment method in which the opening is closed, the microorganism group corresponding to the wastewater solution with a high concentration does not grow sufficiently, resulting in a thin biological layer. The number of protozoa that require mating time is reduced, and the processing capacity tends to deteriorate due to the lack of adaptation to the environment such as the bulking phenomenon in the sedimentation tank. Circulation of the food chain between microorganisms is very important for improving processing capacity. Protozoa that requires a large number of microorganisms in a series of activities in the biofilm method, and fine organic substances C _n H _m O _p as sources for supplements of bacteria and organic substances C _n H because of the effect on the system function when producing excess organic substances that born in _m O _p synthesis process, specifically complex mixed culture system of microorganisms becomes thin very biological layer can not many interactions not hold . In the case of polymer wastewater such as fatty acids and polysaccharides with a slightly higher BOD, or when fluctuations in load occur, there is a problem that the biological treatment cannot function because the microorganisms cannot adapt.

The conventional type of equipment that uses the sprinkling filter bed system is formed by using sunlight and opening the top of the tank. When the opening is closed, there is a large gap in the environmental function of microorganisms, the balance of the food chain is greatly disrupted, and high-concentration wastewater treatment becomes impossible due to a decline in the function of the entire biological treatment. In wastewater treatment with a high concentration and high difficulty such as a polymer, a reliable food chain between microorganisms is premised on an interaction important in biological treatment. Therefore, when the sun is blocked by closing the opening for the purpose of preventing human fall by the opening, scattering of fine water droplets, and multipurpose use of the area, it is located at the bottom of the food chain, In addition, there is a problem in that the biological treatment by the biofilm method does not work because the food chain cannot be circulated when the bacteria and microalgae that require the highest number of growth cannot be obtained.

In addition, wastewater components treated by conventional biological treatment have incomplete removal of inorganic nitrogen N ₂ , and the treated water leaving the nutrient components is discharged, creating a cause of river and marine pollution. In conventional biological treatment, there are many examples where natural ore is used in the sprinkling filter bed method and submerged filter bed method, but the high BOD amount and normal hexane are also high. Wake up, it becomes difficult to inhabit aerobic microorganisms with high processing efficiency, and the processing capacity also drops. This shows that the interaction between aerobic bacteria and the ability of different microorganisms such as anaerobic bacteria to denitrify does not work. Further, when load fluctuation occurs, there is a problem that the processing capacity is lost at that time and a bad odor is generated.

Oxygen supply by the conventional biofilm method is low in dissolution efficiency, excessive air flow is set, and the motor that outputs with the pressure that is the sum of atmospheric pressure, water pressure and discharge pressure is operated for a long time, so energy consumption is also large . In consideration of the dissolution efficiency, in the case of a high concentration BOD amount, the water depth of the treatment tank is often set to about 5 meters, and it is necessary to strengthen the structure in order to obtain the pressure strength.

The high-concentration wastewater treatment system of the present invention is a wastewater treatment system without an opening that reduces the molecular weight of an inflowing organic substance ranging from a low concentration to a high concentration by combining an activated sludge method and a sprinkling filter bed method. A device for irradiating light to a plurality of tanks with a light emitting device, an exhausted carbon dioxide CO ₂ air collecting tube that uses again carbon dioxide CO ₂ generated by microorganisms in each tank for aeration at each mixing ratio, and the inside of a sprinkling filter bed tank A high-concentration wastewater treatment system characterized by having a discharge vent pipe that quickly releases inorganic N ₂ that has been reduced in molecular weight and separated from organic matter to the atmosphere, and a dissolved oxygen auxiliary device that enhances the dissolved oxygen effect by a blower. is there.

The high-concentration wastewater treatment system of the present invention activates photosynthesis by continuously irradiating artificial light for the purpose of dealing with high-concentration wastewater liquid that flows in a treatment environment without openings that cannot use natural light. It provides an environment that provides a stable supply of primary supplementary foods that will serve as a basis for enhancing the stable growth of microorganisms. When sunlight is used in a conventional structure, nighttime photosynthesis cannot be obtained, and it also depends on the weather. Therefore, we select artificial wavelengths of 400nm, 500nm and 600nm that are necessary for plant growth, and continuously irradiate light from 8,000 lux to 20,000 lux from the ceiling and walls of each tank to produce stable and reliable photosynthesis. Promptly. Cyanobacteria are recorded as the first microorganisms born on the earth from a fossil of 3.5 billion years ago. The source of construction of organisms in nature is a small microorganism of 0.001mm to 0.002mm as a primary supplement, and the predated microorganisms are preyed on by the next organism, and its stable food chain forms a purification structure in nature. It has been established. In the biological treatment according to the present invention, after transplanting a liquid obtained by accumulating several kinds of microorganisms for food production to the filter bed layer, many microorganisms surrounding the microorganism group that cannot be artificially created are born and have their respective roles. Take advantage of activities. With such a comprehensive action of microorganisms in the natural world, even if the biochemical oxygen demand BOD is 19,000 ppm for livestock wastewater with a high concentration and a high nitrogen content, the ability to purify to 17 ppm BOD by microbial treatment for 120 hours residence time. Light emitting devices play an important role in promoting photosynthesis in reducing the molecular weight of organic substances, oxidizing them, reducing them, and creating a clean environment where natural microorganisms repeatedly act in the food chain.

The high-concentration wastewater treatment system of the present invention is designed to match the natural structure in which the microorganisms corresponding to the inflowing high-concentration wastewater are active while multiplying in a chain-changing environment. When carbon dioxide CO ₂ generated by microorganisms in the treatment process provided by the environment is mixed with normal aeration to enrich the growth environment of microalgae to synthesize a large amount of microalgae by photosynthesis, unsynthesized surplus organic matter generated at the same time For stable production, carbon dioxide CO ₂ generated by the activity of microorganisms is recovered and reused. Carbon dioxide CO ₂ dissolved in water is changed to bicarbonate ion HCO ₃ −, which is converted to carbon dioxide by an enzyme such as algae, and is combined with hydrogen H to produce microalgae that forms a new organic substance CnHmOp. The unbound surplus organic matter generated at the same time is used for fungal food and fungal growth processes, leading to a stable supply of important primary supplements in the food chain. The carbon dioxide concentration in the atmosphere is as low as 0.035%, and the reuse of carbon dioxide released by microorganisms works efficiently in the circulation of the food chain. Carbon dioxide CO ₂ is recovered from the air collector installed in each tank, and BOD The amount collected by the air collector is blown at a ratio of 20: 1 to 5: 1 with respect to the aeration amount by a blower according to the amount.

In the high-concentration wastewater treatment system of the present invention, a microorganism having the ability to decompose organic substances of wastewater components is transplanted to a sprinkling filter bed in which volcanic pumice-like natural ore and shells are piled up and stacked. In addition to the ability of aerobic bacteria or anaerobic bacteria, along with the structure of nature, it also has a sprinkling filter bed system that makes the most of it. NO ₃ nitrate, which has become a low molecular weight and nitrified under the fast decomposition rate, with aerobic bacteria, facultative anaerobic bacteria, weak anaerobic bacteria and anaerobic bacteria active in the same volume of the sprinkling filter bed Is decomposed into oxygen O and nitrogen gas N ₂ by denitrifying bacteria that are facultative anaerobic, and nitrogen gas N ₂ is partially used for photosynthesis. Nitrogen gas N is used for the purpose of activating the inside of the sprinkling filter bed layer. ₂ Provide a gas collection tube and discharge. Since nitrogen compounds are decomposed to nitrogen gas by denitrification reaction and organic matter removal is performed at the same time, the amount of excess sludge can be extremely reduced from 0.2 to 0.14, which is an important function in the system of the present invention. is there.

Furthermore, in the watering filter bed, aerobic bacteria, facultative anaerobic bacteria, weak anaerobic bacteria and anaerobic bacteria coexist. Oxidation and nitrification are carried out in the sprinkling filter bed tank, and sulfates in the sludge resulting from sludge reduction are reduced to anaerobic bacterial sulfur salt-reducing bacteria to produce hydrogen sulfide H ₂ S. It is an anaerobic bacterium that has an ability that cannot be obtained by aerobic bacteria, such as it does not generate odor by being oxidized and detoxified by sulfur-oxidizing bacteria that survive by photosynthesis, which is also a feature, and at the same time it decomposes mercaptans. The role of activities is great. Since the growth speed of sulfur-oxidizing bacteria is very slow, one per 72 hours, the growth environment of anaerobic bacteria that can coexist in the trickling filter is important. The material used for the filter medium is porous rhyolite, which is a mixture of natural ore with a content of 72% or more of silicon dioxide SiO ₂ and shells made of calcium carbonate at a ratio of 15: 1 to 27: 1. Use shells to dissolve the calcium carbonate required for the mixing.

On the other hand, on the sprinkling filter bed, a group of microorganisms obtained by culturing several kinds of eubacteria and fungi as microorganisms for food production at an appropriate ratio is fixed on the filter medium. For example, aerobic bacteria on the surface of porous serpentine, facultative anaerobes on the inside, weak anaerobic bacteria on the inside, and anaerobic bacteria live on the inside. For example, the size of one filter medium is an elliptical shape of about 250 mm, and the amount of the filter medium is filled according to the components of the organic substance and the amount thereof. The BOD filter media load factor is 13 times 13 kg / m ³ of the BOD volume load. It can cope with high concentration waste liquid treatment day by day. In the filter medium, leaching of carbonate and silicon dioxide required by microorganisms and a small amount of magnesium occurred, and the conventional clogging blockage was solved by the presence of microorganisms that can use this. In the anaerobic state, red earthworms of annelids are present at the top of the food chain and play a role in preventing clogging, and at the same time, sludge nitrification activities are carried out inside the filter bed tank, increasing the effect of reducing excess sludge.

The high-concentration wastewater treatment system of the present invention uses a dissolved oxygen auxiliary device for the purpose of supplying efficient dissolved oxygen. The dissolved effect of this system can be increased by 5% to 20% compared to the conventional method of aeration only with a diffuser. In an environment where the amount of supplied oxygen must always exceed the amount of oxygen consumed by microorganisms, an ideal effect can be obtained with a small blower. In terms of structure, the bubble ball is retained in a curved air pocket while changing the bubble bubble that becomes larger as the water pressure is lowered into a small bubble ball, and the bubble ball makes the residence time longer while touching the contact area of the water film. Get the dissolved effect. Therefore, the depth can be made 0.5 m to 1.0 m shallower than the depth of the conventional water tank, and a structurally advantageous result can be obtained. On the other hand, since the water pressure is also reduced by 0.05 to 0.1 point, the blown energy to be discharged can be reduced.

In the present invention, by utilizing the above-mentioned facilities, the interaction between microorganisms composed of complicated mixed culture systems enhances the activities that match the mechanism of the natural world, and the environment inside the wastewater treatment facility is naturally The effect of adapting to is obtained. Therefore, it is possible to realize a high-concentration wastewater treatment system capable of reliably performing treatment of wastewater consisting of biochemical oxygen demand BOD 3,000 ppm to 30,000 ppm and high-molecular wastewater such as oil.

The ability to achieve day-and-night photosynthesis to provide an artificial photosynthetic environment increases the base of the food chain base by microorganisms, and the total amount of food chain tissue is much greater than that of general microorganism treatment. An increase in processing speed is obtained over microbial processing. The ability to stably supply a constant and powerful light without being affected by fluctuations in the amount of natural sunlight, can achieve a strong maintenance of the food chain that is the basis of microbial treatment. Eliminating the danger of falling by eliminating the opening, preventing the water from splashing finely, preventing adverse effects in the surrounding area, and the exclusive area can be used for other purposes. Furthermore, if there is no problem in equipment construction, the equipment can be installed 0.5 to 1.0 m shallower than the conventional depth. We have taken steps to correctly understand and protect the food chain of microorganisms, which is the basis of biological treatment, so that each interaction is enriched, and the load changes due to complex reactions that the microorganism group adapts to itself. I was able to deal with myself. In addition, since the basics of biological treatment are perfect, the following effects were obtained. Effluent water quality according to the effluent standards can be obtained stably and can play a major role in protecting the natural environment. No filtering device such as activated carbon is required. The generation of excess sludge is 1/6 or more than before, and excessive sludge extraction is very little, and the amount of chemicals used is reduced accordingly, which greatly reduces the overall maintenance cost. A high-concentration wastewater treatment system that does not have any dangerous components such as hydrogen sulfide H ₂ S generated from treatment facilities, and that does not generate odors from biological treatment facilities even with livestock wastewater, and that can reliably perform a natural purification function. Can be realized.

Moreover, the volume for biological treatment is also small compared to the activated sludge method. Since the BOD load factor with respect to the volume of the trickling filter bed of the present invention is 22 times higher than the BOD volume load described in Non-Patent Document P219, the degree of difficulty of high concentration with a smaller volume than the activated sludge method. Even high-molecular wastewater components such as oil and starch, which are said to be high, have no failure and can be reliably treated.

It is sectional drawing of the biological treatment system which shows embodiment of this invention. It is sectional drawing of a watering filter bed and a light-emitting device. It is a top view of a trickling filter bed tank. It is a side view of a dissolved oxygen auxiliary board. It is an elevation view of a dissolved oxygen auxiliary plate. It is an enlarged view of the water film contact surface of a dissolved oxygen auxiliary plate. It is installation sectional drawing of a light-emitting device. It is a block diagram of the food chain of microorganisms.

FIG. 1 shows a flow of processing steps from inflow to discharge of high-concentration waste liquid and an apparatus for carrying out the processing method.

9 in FIG. 1 is a type of volcanic rock showing a sprinkling filter bed. The ratio is 90% to 97% of porphyry rocks, which are 70% or more of silicon dioxide and porous natural ore, and 10% to 3% of shells. The filter medium mixed in the ratio is filled. Leached carbonate or silicic acid and calcium carbonate are used.

A mixture of two or more types of microorganisms for food production having the ability to process high-concentration waste liquor in a proportion corresponding to the waste liquor components, and a culture solution of 900,000 / 1 mm to 1.1 million / 1 mm liter is produced to create a filter bed tank The biological treatment process begins after transplantation and colonization.

Reference numeral 17 in FIG. 1 denotes a light emitting device. The illuminant is a device that combines a discharge tube having three wavelengths of 400 nm, 500 nm, and 600 nm, which works for food cultivation, and a reflector having high light reflectance, and is housed in a protective case. The illuminant is mixed and irradiated with three wavelength bands having 400 nm, 500 nm, and 600 nm necessary for photosynthesis in plant growth, and the upper part of the filter bed is irradiated for a long time at an illuminance of 8,000 lux to 20,000 lux. Preventing the scattering of fine waste water droplets generated during water spraying, using the site necessary for wastewater treatment for other purposes, preventing human fall accidents, or preventing sound generated by water spraying, etc. For this reason, even in a wastewater treatment facility that does not have an opening, it is possible to exhibit the ability to purify nature by using the light emitting device, and it is possible to treat a high concentration waste liquid.

The light emitting device is for reducing the molecular weight of a high concentration wastewater solution in a short residence time, and can increase the concentration including microorganisms, that is, the mixed solution suspended solid concentration MLSS value. Microalgae, which are important for highly efficient food chain circulation, are preyed on by fungi as the primary supplementary food that needs the largest number. It is important and important to provide a stable supply of supplementary foods by applying the action of photosynthesis to keep the food chain in the purification of nature. By irradiating light in the wavelength band necessary for the growth of microalgae in addition to minerals such as carbonate or silicic acid and calcium carbonate that are slightly leached from the filter medium, active photosynthesis works, and new 0.001mm to 0.002mm An environment that allows birth of a large amount of microalgae of the size of scientists has been prepared, and the microorganisms themselves have an extremely simple structure by artificially synthesizing the food chain circulation necessary for the microorganisms that are the basis of biological treatment. It is a treatment method that incorporates a natural purification function that can be circulated.

Reference numeral 15 in FIG. 1 denotes an exhausted carbon dioxide CO ₂ air collecting tube. The air collection tube sucks and collects carbon dioxide CO ₂ generated by the microorganisms in the activity process, and blows air by changing the ratio of the air collection amount and the aeration amount from 1: 5 to 1:20 according to the BOD amount from the aeration apparatus. Circulating the food chain of the microbial community is important to purify high-concentration wastewater by biological treatment. With the supply of supplementary foods between the microorganisms, the primary supplementary food becomes the beginning of the food chain. In the process of proliferating microalgae in the bacterial area as the supplementary food, it greatly assists in the birth of new organic matter. The proportion of carbon dioxide CO ₂ in the atmosphere is as low as 0.035%. Usually, carbon dioxide CO ₂ dissolves in water and changes to bicarbonate ion HCO ₃ ⁻ , but in this process fine carbon dioxide is produced by the action of enzymes such as algae. It is generated as CO ₂ and combined with hydrogen H to become a new organic substance C _n H _m O _p . This is largely related to the birth of microalgae. Microalgae are used as food for many fungi. The large amount of unbound surplus organic matter generated at the same time can be used only by fungi and is used for the growth of fungi. Wastewater that promotes the low molecular weight of high-concentration wastewater components that play an important role in the degradation of polymers such as cellulose, lysine, starch, saccharides, disaccharides, and polysaccharides. Processing method.

Reference numeral 14 in FIG. 1 denotes a discharge vent pipe. The discharge vent pipe is made of high-density polyethylene. Pipes are installed at intervals of 700 mm with respect to the cross section of the filter bed tank, and pipes are installed at an interval of 700 mm with respect to the plane, particularly with a 11 ° gradient in the cross section. Many holes of 30 mm are made on the lower side of the discharge vent pipe, and the end on the climbing side is joined to the vertical pipe to discharge to the outside air. The filter medium is pumice-like porous, and the surface has aerobic bacteria, facultative anaerobic bacteria, weak anaerobic bacteria, and anaerobic bacteria in the order of different microorganisms living in the same environment. Among these activities aerobic bacteria most often, protein is an organic compound containing nitrogen is depolymerized by bacterial aerobic, after brought to nitrate NO _3, denitrifying bacteria hydrogen and organic which is anaerobic bacteria Nitrogen NO ₃ is converted to nitrous acid NO ₂ in a denitrifying environment with carbon, and anaerobic bacteria are further decomposed into nitric oxide NO, further converted into dinitrogen monoxide N ₂ O, and nitrogen gas N ₂ separated therefrom is It is necessary to quickly separate from the filter medium layer. By carrying out this process promptly, it was possible to reduce the amount of excess sludge by 1/3 to 1/6 of the conventional biological treatment. In this way, the source of interaction between anaerobic bacteria and anaerobic bacteria in the same environment is to achieve it in the best environment of the food chain, which is the basis for natural purification. As a result, the amount of nitrogen N ₂ in the discharge water is reduced, so that the secondary pollution prevention effect after the discharge is very large, and the drainage treatment system has a large effect of the discharge vent pipe.

Reference numeral 19 in FIG. 1 denotes a dissolved oxygen assist device. Conventional aeration systems emit fine bubbles that are discharged from the floor. Inversely proportional to the drop in water pressure, the bubble bubble becomes larger, the rising acceleration is added, the liquid level is reached quickly, and it immediately goes out to the atmosphere and is inefficient. Therefore dissolved oxygen aids in the process of air discharged at the bottom rises, air is small is larger by then bubble ball milling plate from following the water film shown in 3 8 6 in the course of the repeated The contact material or the like mainly plays a role of bringing oxygen into contact with the waste liquid, and holds the bubble balls in the liquid for a long period of time. Compared with the conventional air diffuser, the effect of dissolved oxygen was increased by 18% to 23% with the same air flow. The amount of microorganisms corresponding to a high concentration waste liquid is large, and the supply amount of oxygen is naturally required to be large. It is important to satisfy the oxygen amount most suitable for the activity of microorganisms. Furthermore, in the case of the conventional aeration method, it depends greatly on the fluctuation of the water temperature and the water depth, and it is necessary to send a large amount of aeration, but this dissolved oxygen auxiliary device is not necessary. A blower can be made small by using a dissolved oxygen auxiliary device together with a conventional diffuser. Moreover, even if the depth of the water tank structure is 0.5 m to 1.0 m shallower than the conventional depth, a sufficient amount of oxygen can be obtained.

DESCRIPTION OF SYMBOLS 1 Raw water pit tank 2 Screen tank 3 Flow control tank 4 Filter bed layer and immersion filter bed tank 5 Circulation explosion tank 6 Precipitation separation tank 7 Sterilization tank 8 Discharge tank 9 Sprinkling filter bed 10 Pump pit tank 11 Falling water space 12 Circulation pump 13 Sprinkling pump 14 Discharge vent pipe 15 Discharged carbon dioxide CO ₂ air collecting pipe 16 Sprinkling discharge nozzle 17 Light emitting device 18 Dispersing pipe fine 19 Dissolved oxygen auxiliary 20 Dispersing pipe roughing 21 Automatic screen 22 Raw water pump 23 Adjusting pump 24 Sterilization Drug cylinder 25 Discharge pump / washing pump 26 Sludge return pipe 27 Inspection manhole 28 Denitrification and reduction tank, but placed in front of 6 in a set with 29 due to the nature of raw water 29 Although it is a secondary explosion tank, it is 28 due to the nature of raw water Arranged in front of 6 in a set 30 Raw water inflow pipe 31 Drain pipe 32 Automatic cleaning pipe 33 of light emitting device Member SUS
34 The member is a hook SUS
35 Member support SUS
36 Bubble Ball Crush Plate SUSL
37 Strut Rigid polyethylene 38 Water film contact material Rigid polyethylene 39 Weight 40 Light-emitting device 41 Light-emitting device protective cover 42 Ventilation intake connector 43 Ventilation air duct 44 Air filter 45 Power terminal 46 Power line 47 Inspection lid 48 Inspection lid 49 Ventilation Discharge connector 50 Protective cover cleaning nozzle 51 Protective cover cleaning nozzle 52 Cleaning water pipe 53 Sprinkling filter floor sprinkling nozzle 54 Sprinkling pipe 55 Sprinkling filter medium

Claims (5)

It consists of a plurality of treatment tanks that combine a circulating aeration tank with activated sludge system and a sprinkling filter bed tank with sprinkling filter bed system,
A light-emitting device that irradiates artificial light to each closed treatment tank without an opening so that natural light does not enter;
An exhausted carbon dioxide CO ₂ air collection pipe that is installed in a circulating aeration tank and collects carbon dioxide CO ₂ discharged by microorganisms in the tank for use in aeration ;
A discharge vent pipe disposed in the sprinkling filter bed tank for collecting nitrogen N ₂ generated in the tank and releasing it outside the tank;
A dissolved oxygen auxiliary device installed on the bottom of the circulating aeration tank, which subdivides the bubbles of air released into the waste liquid, keeps the subdivided bubbles in the waste liquid, and dissolves oxygen in the waste liquid;
An air diffuser installed on the bottom of the circulating aeration tank and releasing air from the vicinity of the bottom of the tank,
Consists of
The dissolved oxygen assister
It consists of a main body part in the shape of an inverted truncated pyramid that is wide toward the top, and a leg part that stands on the bottom of the circulating aeration tank and supports the main body part,
In the body part,
A bubble ball crushing plate that subdivides the air bubbles that are released into the waste liquid and rise while passing through the main body part,
A water film contact material that is released into the waste liquid and keeps air bubbles rising while passing through the main body, and
Is provided
A high-concentration wastewater treatment system characterized by that . It consists of a plurality of treatment tanks that combine a circulating aeration tank with activated sludge system and a sprinkling filter bed tank with sprinkling filter bed system,
A light-emitting device that irradiates artificial light to each closed treatment tank without an opening so that natural light does not enter;
An exhausted carbon dioxide CO ₂ air collection pipe that is installed in a circulating aeration tank and collects carbon dioxide CO ₂ discharged by microorganisms in the tank for use in aeration ;
A discharge vent pipe disposed in the sprinkling filter bed tank for collecting nitrogen N ₂ generated in the tank and releasing it outside the tank;
A dissolved oxygen auxiliary device installed on the bottom of the circulating aeration tank, which subdivides the bubbles of air released into the waste liquid, keeps the subdivided bubbles in the waste liquid, and dissolves oxygen in the waste liquid;
An air diffuser installed on the bottom of the circulating aeration tank and releasing air from the vicinity of the bottom of the tank,
Consists of
The dissolved oxygen auxiliary is
It consists of a main body part in the shape of an inverted truncated pyramid that is wide toward the top, and a leg part that stands on the bottom of the circulating aeration tank and supports the main body part,
In the body part,
Two struts (first strut, second strut) are arranged in parallel alternately in a row,
In the first column,
In order to subdivide the air bubbles that are released into the waste liquid and rise while passing through the main body part, a bubble ball crushing plate with a long V-shaped cross section in the column direction of the pillars,
In the second column,
A semicircular arc-shaped water film contact material that is long in the column direction of the pillars and has a depression in the lower part in order to keep air bubbles rising while being discharged into the waste liquid and passing through the main body part,
Multiple each mounted vertically
A high-concentration wastewater treatment system characterized by that . The air diffuser is
For the diffuser tube installed directly under the dissolved oxygen auxiliary device,
Aeration tube ablation installed between the dissolved oxygen auxiliary device and the tank wall;
Consist of
The high-concentration waste water treatment system according to claim 1 or 2 . The watering filter bed is
The filter medium is mixed with volcanic pumice-like natural ore and shells in a ratio of 15: 1 to 27: 1.
The high-concentration wastewater treatment system according to any one of claims 1 to 3 . The discharge vent pipe is
It is piped in the tank with a gradient,
A plurality of vent holes are provided on the lower side of the discharge vent pipe.
The high-concentration waste water treatment system according to any one of claims 1 to 4, wherein

Images