KR200172809Y1 - Bacteria group of bacillus spp in the aerobic reacting device for treating nihgtsoil, stackbreeding waste water, leachate and industrial organic wastewater - Google Patents

Abstract

The present invention relates to a technology for removing nitrogen and phosphorus contained in manure, livestock wastewater, leachate, and high concentration organic industrial wastewater, and more specifically, dilutes organic matter, nitrogen, and phosphorus as discharge-free and discharges the process. Simplify operation and reduce nitrogen by eliminating nitrification process, saving power and eliminating odor generated during treatment process. No special deodorization equipment is needed. The present invention is applied to the aerobic reaction treatment apparatus of manure, livestock wastewater, leachate and organic industrial wastewater by Bacillus spp.

The present invention, in particular, by using the aerobic reaction process-chemical coagulation sedimentation process, including the input tank and storage tank, aerobic reaction tank and sedimentation tank, drug mixing tank, drug formation tank and coagulation sedimentation tank, manure, livestock waste water, leachate and organic industrial waste water In the aerobic reaction process, the microbial activator of the Bacillus species mixed bacteria is administered to the aerobic reactor and the sludge of the settling tank is returned to the aerobic reactor while the Bacillus species mixed bacteria repeat the process of filamentous, spore- germinated and dead bodies. It is characterized in that organic wastewater containing a large amount of nitrogen and phosphorus is treated, and at the same time, residual phosphorus is removed in a chemical flocculation and sedimentation process.

Description

Bacteria group of bacillus spp in the aerobic reacting device for treating nihgtsoil, stackbreeding waste water, leachate and industrial organic wastewater}

The present invention relates to a technology for removing nitrogen and phosphorus contained in manure, livestock wastewater, leachate, and high concentration organic industrial wastewater, and more specifically, dilutes organic matter, nitrogen, and phosphorus as discharge-free and discharges the process. Simplify operation and reduce nitrogen by eliminating nitrification process, saving power and eliminating odor generated during treatment process. No special deodorization equipment is needed. The present invention is applied to the aerobic reaction treatment apparatus of manure, livestock wastewater, leachate and organic industrial wastewater by Bacillus spp.

Recently, the removal of organic matter, nitrogen and phosphorus contained in manure, livestock wastewater, leachate, and high concentration organic wastewater has weakened natural environment by causing eutrophication and red tide in stagnant lakes, rivers and coasts. It is a well known fact that it causes enormous losses.

By the way, in recent years, although the removal technology of nitrogen and phosphorus contained in wastewater and wastewater is insufficient, many treatment technologies have been developed and put into practical use. However, the removal of nitrogen and phosphorus in manure, livestock wastewater, leachate, and high concentration organic wastewater is virtually inexhaustible, and its severity is unspeakable.

The technical field to which this technology is applied is Article 2, Paragraph 8, Livestock Wastewater Treatment Facility of Water Pollution Prevention Facility and Act on Treatment of Sewage, Manure, and Livestock Wastewater as provided in Article 6 of the Enforcement Rule of Article 2 Article 9 is defined as a manure treatment facility, and the prior art in the above-mentioned field is a treatment technique combined with anaerobic digestion and various aerobic treatment methods, aerobic digestion and various aerobic digestion methods.

However, these prior arts, only organic matter meets the discharge standard and the removal rate of nitrogen or phosphorus is less than 50%, the current situation is that all installations and operating facilities exceed the discharge standard. In addition, since 10 to 20 times of dilution water is required after anaerobic digestion or aerobic digestion, facility costs are high, maintenance costs are high, and the process is complicated.

In addition, facilities that remove odor generated in each process should be separately installed, and durability of the facility is shortened due to corrosion of the facility due to odor, and has been stigmatized as a hate facility due to surrounding complaints caused by odor.

Therefore, the present invention is to solve the problems of various aerobic treatment techniques in parallel with the conventional anaerobic digestion method or aerobic digestion method, the purpose of the dilution is to discharge organic matter, nitrogen and phosphorus to discharge below the discharge standard. In addition to simplifying the process, it is easy to operate and removes nitrogen without undergoing nitrification, which saves power and eliminates the need for a separate deodorization system to remove odors generated during the treatment process. The installed plant is also to provide an aerobic reaction treatment device of manure, livestock wastewater, leachate and organic industrial wastewater by the Bacillus species mixed bacteria to apply the present invention by a slight modification.

1 is a process chart to which the present invention is applied,

Figure 2 is a cytological schematic diagram of the sporulation for the present invention,

3 is a life cycle of Bacillus sp. Mixed bacteria for the present invention,

4 is a mechanism of organic wastewater treatment according to the present invention,

<Description of the code | symbol about the principal part of drawing>

1: enemies, 2: tanks,

3: input tank effluent, 4: pretreatment facility,

5: pretreatment plant effluent, 6: storage tank,

7: storage tank aerator, 8: storage tank effluent,

9: aerobic reaction tank, 10: aerobic reaction article 1,

11: aerobic reaction article 2, 12: aerobic reaction article 3,

13: aerobic reactor 1 aeration device, 14: aerobic reactor 2 aeration device,

15: aerobic reactor 3 agitator, 16: aerobic reactor effluent,

17: sedimentation tank, 18: sedimentation tank sludge collection device,

19: sludge conveyed, 20: sludge conveyed into the feed tank,

21: surplus sludge, 22: sedimentation tank runoff,

23: chemical mixing tank, 24: chemical mixing tank stirring device,

25: agglomeration forming tank, 26: agglomeration forming tank stirring device,

27: flocculation tank effluent, 28: chemical flocculation tank,

29: Chemical flocculation sedimentation tank sludge collection device, 30: Chemical flocculation sedimentation sludge,

31: chemical flocculation tank effluent, 32: discharge tank,

33: effluent, 34: sludge concentration tank,

35: sludge concentration tank sludge collection device, 36: sludge concentration tank separation liquid,

37: concentrated sludge, 38: sludge storage tank,

39: dehydrator inflow sludge, 40: dehydrator,

41: dehydration amount, 42: sludge dewatering cake.

The present invention for achieving the above object is an aerobic reaction process, including the input tank and storage tank, aerobic reaction tank and precipitation tank, drug mixing tank, drug formation tank and flocculation settling tank-chemical coagulation sedimentation process using manure, livestock wastewater, In the treatment of leachate and organic industrial wastewater, the microbial activator of Bacillus sp. Mixed bacteria is administered to the aerobic reactor and the sludge of the settling tank is returned to the aerobic reactor, while the Bacillus sp. The process of filamentous repetition is characterized by treating organic wastewater containing nitrogen and phosphorus in large amounts and removing residual phosphorus and chromaticity in the chemical flocculation process.

In addition, the present invention variably sends the return sludge in the settling tank to the aerobic reaction tank to maintain the mixed floating solids of the first reaction tank 6,000 ~ 8,000 ㎎ / L, but the sludge conveying is characterized in that to return about 50 to 100% of the influent There is this. In this case, the concentration of Bacillus species mixed bacteria is about 10 ⁷ ~ 10 ¹¹ / mℓ.

In addition, the present invention is the aerobic reaction tank is divided into three chambers, Article 1 keeps dissolved oxygen at 0.5mg / ℓ, Article 2 maintains dissolved oxygen at 0.1mg / ℓ and Article 3 does not inject any air precipitation In order to prevent mechanical oxygen agitation, dissolved oxygen is 0mg / l, and Bacillus sp.

In addition, the present invention is a rapid mixing reaction of the sedimentation tank effluent from the chemical mixing tank to the stirring device, and then slowly stirred by the agitation device in the flocculation tank to increase the coagulation, so that the solid-liquid separation occurs in the chemical flocculation tank, the supernatant is discharged after disinfection and sludge It is sent to the sludge concentration tank from the dehydration feature.

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

First of all, the present invention is based on B. antharcis, B. lentus, B. lenteni, B. licheniformis belonging to Group I among the Bacillus species in manure, livestock waste, leachate and organic industrial waste. ), B. megaterium, B. pumilus, B. subtilis, B. thuringiensis and B. subsidiary B. .alvei), B. azotofixans, B. macerans, B. polymyxa, B. popilliae and B. popilliae belonging to group III B. coagulans, B. stearothermophilus and B. pasteurii belonging to group IV, B. spphaericus, and B. spphaericus of the unidentified group. cultured mixed cells such as fastidiosus) As a treatment method, the Bacillus species mixed bacteria to create an environment that can grow well in the wastewater to remove various organic substances, nitrogen and phosphorus and other odorous substances contained in the wastewater at the same time.

The main contents of the present invention will be described in more detail as follows.

The most important process in the present invention is carried out in the aerobic reactor (9).

First, in Article 1 (10) of aerobic reaction, it is necessary to create an environment in which Bacillus sp. Mixed bacteria, which are mobile bacilli, can live well. When the dissolved oxygen (DO) is maintained at about 0.5 mg / L by controlling the amount of inlet air in the aerobic reactor 1 (10), the redox potential (ORP) is 200-250 kPa, and the Bacillus species mixed with alkaline substances. Intake, hydrogen ion concentration (PH) is adjusted to 6.0 ~ 6.9.

Since the mixed suspended solids (MLSS) concentration should be maintained at 6,000 to 8000 mg / l, when adjusted as the sludge conveyance (19) in the settling tank (17), the living environment of the mixed Bacillus species is improved, and the concentration of the mixed cells is 10 ⁷ to 10 ¹¹ cells / ml, such high concentrations of bacteria result in greater demand for nutrients and organics. In other words, assuming that the cell constituents are C ₅₀ H ₈₇ O ₂₃ N ₁₂ P, 0.12 kg of nitrogen and 0.025 kg of phosphorus are required to synthesize 1 kg of cells.

Bacillus spp. Are used as a carbon source and energy source to break down organic materials. Some Bacillus species (eg, Bacillus richenimois, Bacillus pastidis, Bacillus pasteuri, etc.) decompose urea, uric acid, purine and ammonium salts. It grows by using as a nitrogen source and energy source, and the intake of biological phosphorus starts when the dissolved oxygen (DO) is 0.1mg / l and the poly-p synthesis starts and the dissolved oxygen (DO) is 0.5mg / l. Is maximized to effectively remove organic matter, nitrogen and phosphorus in the wastewater. The cell constituents of Bacillus spp. Mixed cells account for 50% carbon, 20% oxygen, 14% nitrogen and 3% phosphorus.

Bacillus spp. Also grows logarithmically and secretes powerful hydrolytic enzymes such as catalase and superoxide dismutase to break down polysaccharides, nucleic acids, proteins and lipids that are difficult to degrade. It is used as an electron donor and these enzymes also serve to destroy toxic oxygen derivatives. And when the dissolved oxygen (DO) is more than 1.0mg / ℓ nitrogen contained in the waste water is nitrified and consumes 4.457kg of dissolved oxygen per kg of nitrogen, which causes a huge power cost burden.

However, in the present design, since the dissolved oxygen (DO) of the aerobic reactor (9) is maintained at 0.5 mg / l, the nitrification of the nitrifying microorganisms and the heterotrophic microorganisms is not affected and the nitrification does not occur at all. (H ₂ S), amine groups, ammonium salts and ammonia nitrogen are ingested and converted into cell constituents.

Growth of filaments of Bacillus spp. By dissolving the microbial activator shown in Table 1 in the reaction tank (9) in an amount of 0.02 kg to 0.06 kg per day per kg of incoming biochemical oxygen demand (BOD) Induces spores. Here, the properties of the injectable microbial active agent are shown in Table 1, wherein silicic acid is involved in filamentous growth and sporulation promotion, magnesium stabilizes the structure of ribosomes, cell membranes, nucleic acids, and the like. Manganese is also required for activity, and manganese is also contained in large amounts in one type of disproportionase (superoxide dismutase), which acts as an activator of many enzymes and plays an important role in detoxifying toxic oxygen derivatives in living organisms.

TABLE 1

Ingredients of Microbial Activator

The application temperature range is 15-45 ° C but the optimum temperature range is 25-35 ° C. SV is 60 ~ 80% and SV1 is about 100. The microbial phase in the aerobic reactor (9) is a mixture of Bacillus spp. Forming entangled filaments, returned spores, and protozoa represented by the food chain (Vortilcella, Epistylis, Opecuraria). Opercularia, Carchesium, Zoothanium, Podophrya and other welfare animals (Rotaria, Lepadella, Colurella, Leconl) Chattonotos (Chaetonous), Diprogaster (Diprgaster, etc.) will coexist.

Second, in the aerobic reaction article 2 (11), the Bacillus spp. Mixed with the filamentous bacterium under rapid depletion of organic matter, nitrogen, and phosphorus is a preliminary step in which the Bacillus sp. It starts to form one spore per cell with strong resistance, but when exposed to air, spore formation is slowed down. Therefore, the amount of injected oxygen is rapidly reduced so that dissolved oxygen is adjusted to 0.1 mg / l or less. As organic and nutrients decrease, dissolved oxygen decreases, and the living environment worsens, endogenous spores begin to form, and adhesives are formed around the spores. This is getting bigger and more specific.

In addition, protozoa ingest undisaggregated, dispersed cells and epithelial animals ingest small microbial masses that do not precipitate. The sporulation process is shown in FIG. Where (a) is the feeder cell: contains two nuclei (n), (b) agglomerates of nuclear material, (c) starts diaphragm formation, (d) completes diaphragm formation, and (e) is located around the pores New wall growth, (f) the synthesis of the spore cortex, (g) the synthesis of the spores, (h) the glass of the spores, W the cell wall, m the cell membrane, n the nucleus, c the cortex, and sc the spores It is angle.

Notable items in this condition include baccitracin, polymyxin, tyrocidin, granicidin, ceraurin, etc. By releasing large amounts of antibiotics, E. coli and general bacteria are lysed and killed, which also disinfects the treated water. In particular, B. thuringiensis produces crystalline protein (Crystaline protein) that is toxic during the spore formation period, which may interfere with the growth and development of insects (fly, mosquito, etc.) in the sludge. SV is about 50 to 60%.

Third, the Bacillus species mixed bacteria in the aerobic reaction Article 3 (12) changes the vegetative cells of almost all the cells due to deterioration of the surrounding living environment to form spores so that the solid-liquid separation can easily occur (endogenous spore forming ability) Never occurs during nutrition). And in order to prevent sedimentation, it is preferable to install an aerobic reactive solution 3 tank stirring apparatus 15 which can be mechanically stirred. Sporeing time can range from 20 minutes to several hours depending on ambient conditions. SV is about 40-50%.

As described above, Bacillus spp. Forms bacterial filaments at first and continues to divide while growing logarithmically, and when the condition worsens, spore formation and germination are repeated to form filaments and wastewater treatment is performed.

The life cycle of such Bacillus sp. Mixed bacteria is shown in FIG. 3.

On the other hand, hydrogen sulfide and various nitrogen compounds are ingested and removed during the treatment process, so no odor is generated and no separate deodorization facility is required. Here, in order to reduce odor in the input tank 2 and the pretreatment tank facility 4, it is preferable to introduce about 1-2% of the sludge conveying input tank 20 to the inflow amount 1.

Figure 4 shows the mechanism (mechanism) for the present invention.

An embodiment of the present invention will be described in detail with reference to FIG. 1.

First, raw water (1), which is a manure (or septic tank sludge), livestock wastewater, leachate, and organic industrial wastewater introduced into the input tank 2 through a collection vehicle or a pipeline, is introduced into the storage tank 6 through a pretreatment facility 4. . In the storage tank (6), the water quality becomes uniform by mixing with the air injection while staying for a certain time, thereby preventing the corruption and precipitation of the raw water. A certain amount of wastewater from the storage tank (6) enters the aerobic reactor (1) chamber of the aerobic reactor (9) and is ingested and oxidized by metabolism while contacting the Bacillus species mixed bacteria cultured at high concentration. As decomposition occurs, the filamentous body grows logarithmically.

A small amount of microbial activator was added to the aerobic reactor 1 (10), 0.5 mg / l of dissolved oxygen (D0), 6,000-8,000 mg / l of mixed suspended solids (MLSS), and 6.0- of hydrogen ion concentration (PH). 6.8 Maintaining the optimum growth of Bacillus sp. Mixed bacteria while maintaining the temperature of 20-35 ℃, the aerobic reactant 2 (11) removes most of organic matter and nutrients from the aerobic reactant 1 (10). In addition to becoming nutrients, artificially minimizing dissolved oxygen makes the living environment of Bacillus species mixed worst, and the cells enter the sporulation stage as they prepare to form spores for survival.

Then, in Reactor 3 (12), air injection was completely stopped and the biomass of the Bacillus sp. Mixed bacteria was worsted while preventing the sedimentation by the mechanical stirring device 15. Make it angry.

The spore aerated liquid flows into the sedimentation basin (17), which is the next process, and sedimentation is separated. The spores are sedimented with each other by the adhesive substances secreted as spores, and the suspended solids are adsorbed to form a large prok. Separation proceeds well. The sludge precipitated here is variably sent to the aerobic reactor 1 (19) in order to keep the concentration of the cells constant.

On the other hand, the sludge conveyance 20 of about 1-2% of the inflow amount is effective in reducing the odor in the storage tank 2, the pretreatment facility 4, and the storage tank 6.

The remaining excess sludge 21 is sent to the sludge storage tank 38. Sedimentation tank effluent (22), which is separated by sedimentation, is introduced into the chemical mixing tank (23) and rapidly stirred together with the coagulant and the neutralizing agent. At this time, the chemical mixing tank stirring device (24) has a speed of about 120-128 rpm. After rapidly mixing and reacting the inflow water with the chemicals, the mixture is introduced into the flocculation tank 25 and gradually mixed with the flocculating aid to form a large aggregate. At this time, the flocculation tank agitation device 26 is variable in the range of 30 to 60 rpm. After adjusting the speed to increase the formation of flocs, the flocculation tank effluent 27 flows into the chemical flocculation sedimentation tank 28 and the sedimentation is performed, and the precipitated sludge 30 is sent to the sludge concentration tank 34 and concentrated. The concentrated sludge 37 is sent to the sludge storage tank 38 and the sludge concentrate tank separation liquid 36 is sent to the aerobic reactor 1 (10). Here, it removes phosphorus, which is still contained in small amounts, and also removes a lot of color. It is a facility to remove suspended solids as an emergency means in case of inadvertent operation or bad condition.

The sedimented separated supernatant 31 from the chemical flocculation settling tank 28 is sent to the discharging tank 32, which is disinfecting tank, and then discharged 33 after disinfection as necessary (may be omitted). The sludge to be discarded is collected in a sludge storage tank 38 and then injected into the dehydrator 40 with sludge mixed with a polymer (which may be omitted in some cases) into a sludge dewatering cake 42, which is incinerated or landfilled, It is used for composting and the dehydration liquid 41 is sent to the aerobic reactor 1 (10).

In particular, when composting the sludge cake generated in the above-described process, the Bacillus spp. Is originally a soil microorganism, and thus serves to supply the nutrients necessary for the plants in the soil and to prevent decay because it contains antibiotics. Insect pests are removed because they contain toxic crystalline proteins, which are effective only for invertebrates.

Table 2 shows a comparison between the process of the present invention and the conventional treatment process described above.

TABLE 2

Comparison of new process with existing process

Using the process diagram of Figure 1 is an example of a model experiment to treat the manure of 5㎘ per day.

The characteristics of the manure introduced are shown in Table 3.

TABLE 3

The manure of Table 4 is introduced into the aerobic reactor by a predetermined amount in the storage tank, and finally discharged through the chemical flocculation sedimentation process. The operating conditions of the aerobic reaction in the 1st and 2nd treatment process are shown in Table 4, and the operating conditions of the chemical flocculation settling are shown in Table 5.

TABLE 4

Operation conditions of aerobic reaction

TABLE 5

Operating Conditions of Chemical Coagulation Precipitation

The aerobic reaction tank used in the examples was divided into three tanks and sludge was returned from the settling tank to maintain the mixed solids (MLSS) of each tank at 6,000-8,000 mg / l. In addition, 0.1m ³ / day from the settling tank was sent to the storage tank to reduce the odor at the initial stage, and to promote the activity of the Bacillus species mixed bacteria was administered about 30g / day microbial activator in Table 1.

In the aerobic reactor, Bacillus cells were filamentized and grown logarithmically. In Reactors 2 and 3, filaments were cut and spores were formed, and some of the sludge that had settled was returned to the Reactor 1 and storage tanks. Excess sludge was dewatered. The supernatant flows into the chemical admixture bath and is slow to stir with the polymer coagulant, resulting in a larger prok. The effluent formed with the coagulation is solid-liquid separated in the coagulation sedimentation tank, and the separated sludge is dewatered and the supernatant is discharged through the sterilization tank.

Table 6 shows the treatment efficiency in each process.

TABLE 6

Property unit of treated water for each process: ml / l

As shown in Table 6, the incoming raw water is removed from most organics, nitrogen and phosphorus aerobic reactors after some insoluble organics are removed along with the residues in the pretreatment plant. The removal efficiencies showed high values of BOD 99.8%, COD 99.7%, SS 99.9%, T-N 99.5%, and T-P 99.7%. In addition, as in the existing process, a huge facility cost has to be invested, such as about 20 times dilution water is required to control the operation of the activated sludge process. However, this process does not require an activated sludge process, and even without dilution water, nitrogen and phosphorus are more than expected. Can be removed. However, the removal rate of phosphorus is not enough at night, so it is advanced processing by installing chemical flocculation sedimentation facility. Nitrogen and phosphorus removal cannot be expected in existing processes, and significant facility investment is required to add advanced treatment facilities to existing processes.

As described above, the present invention, in particular, the present invention is superior to the conventional treatment method, and at the same time the removal efficiency of nitrogen and phosphorus can be removed without adding an advanced treatment facility for treating nitrogen and phosphorus at the same time superior to the conventional treatment method It is inexpensive, and the operation is simple and stable, so the maintenance cost is much less, and the sludge generated in this treatment process has less swelling and can be used as compost.

Claims (4)

Aerobic reaction processes including input tanks, storage tanks, aerobic reaction tanks and settling tanks, drug mixing tanks, drug forming tanks, and flocculation settling tanks-In the treatment of manure, livestock wastewater, leachate and organic industrial wastewater, In the reaction process, the microbial activator of Bacillus sp. Mixed bacteria is administered to the aerobic reactor and the sludge of the settling tank is returned to the aerobic reactor, while the Bacillus sp. An aerobic reaction treatment apparatus for manure, livestock wastewater, leachate, and organic industrial wastewater by treating Bacillus sp. Mixed bacteria, wherein the organic wastewater is contained and the residual phosphorus and color are removed in the chemical flocculation sedimentation process. The method according to claim 1, wherein the return sludge from the settling tank is variably sent to the aerobic reactor to maintain 6,000 to 8,000 mg / l of the mixed floating solids of the first reactor, but the sludge is returned to return about 50 to 100% of the influent. Aerobic Reaction Treatment System for Manure, Livestock Wastewater, Leachate and Organic Industrial Wastewater by Bacillus Species The aerobic reaction tank is divided into three chambers, wherein the first tank maintains dissolved oxygen at 0.5 mg / l, the second tank maintains dissolved oxygen at 0.1 mg / l, and the third tank maintains no air. Manure, livestock wastewater, leachate and organic industries by Bacillus species mixed bacteria, characterized in that the Bacillus species mixed bacteria completely spores by dissolving oxygen to 0mg / ℓ while mechanical stirring to prevent precipitation without injection. Aerobic reaction apparatus for wastewater. 2. The method of claim 1, wherein the sedimentation tank effluent is rapidly mixed in a chemical mixing tank with a stirring device, and then agitated slowly by the agitation device in an aggregating tank to increase agglomeration so that solid-liquid separation occurs in the chemical flocculation tank, and the supernatant is discharged after disinfection. Aerobic reaction treatment apparatus for manure, livestock wastewater, leachate and organic industrial wastewater by Bacillus species mixed bacteria, which is sent from the sludge to the sludge concentration tank.