KR19990025207A - High concentration nitrogen, phosphorus removal sludge, advanced treatment method and microbial fixation method - Google Patents

Abstract

In the present invention, there are numerous treatment methods and installations in existing environmental foundation facilities such as manure, livestock, sewage, and industrial wastewater in Korea, but they do not properly treat organic matter (BOD), classmates (SS), etc. Salts such as nitrogen and phosphorus have been almost excluded from the treatment method. However, in the government, hundreds of manure, sewage and sewage treatment facilities nationwide treat only less than 80% of BO and SS even though they have invested a lot of budget. Only the BO and SS can be processed to learn the required treatment technology, and even this is caused by the lack of technology and lack of management.

The present invention, by fixing the anaerobic-fixing microorganisms and aerobic microorganisms using the soil microorganisms in nature, organic matter (BOD) and suspended solids (BOD) and suspended solids (eg, organic high concentration wastewater discharged from industrial wastes, manure, livestock, sewage, landfills) SS) and nutrients of river microorganisms remove nitrogen and phosphorus in a short time. The human nitrogen and phosphorus advanced treatment method using this soil bacterium is used in the water treatment field to remove nitrogen and phosphorus in high concentration organic wastewater. The state of the art is invented.

Description

High concentration nitrogen and phosphorus removal activated sludge process and microbial fixation method

Where the present invention should be solved is the standard manure, livestock wastewater, sewage, sewage, waste leachate, various wastewater treatment facilities of the factory, or various new facilities contained in the new environmental basic facilities such as manure, livestock, sewage, landfill leachate, sewage Large (large) and three (small) contaminants are introduced into the injector or inlet. In the conventional method, most of them are water-seal operation, and a large amount of odor is generated when various organic wastewater is input. By using a double band type inflow injector, it blocks the odor at the time of infiltration and inflow.

The various types of organic wastewater, including manure, livestock, sewage, sewage, factory organic wastewater, and leachate, are referred to as organic wastewater, and the slope distribution tank 13 has a three-sided slope. The sand is introduced into the sedimentation hopper input tank (7), and the various contaminants and organic wastewater flow into the square chute knife gate valve installed at the front of the rotary screen screw press (4). Large coarse sediment is removed from the sand, and light sand, various seeds, etc. are discharged to the lower portion of the rotary screen and to the outlet installed at the bottom.

The spilled fine (small) contaminants and the light sand are introduced into the sedimentation hopper tank (7) at 45-60 °. In the case of concrete structures, the sediment is deposited using a very smooth material (preventing corrosion). The steel structure is also the same structure, and various floats and sands flow out to the bottom, and organic wastewater and sewage collected at the bottom are pumped to the rotating wedge screen through the pump, and the bypass line is provided for quantitative supply. to be. In addition, the three narrows separated from the wedge screen 11 is incinerated with the coarse grains of the rotary screen (4).

The organic wastewater flowing out of the wedge screen 11 flows into the inclined storage tank 13 through the outlet 12 of the wedge screen 11 and the inclined storage tank 13 is used to smoothly clean the foreign substances inside during maintenance. It is a special device structure.

The inclined storage tank 13 has more than two days of the inflow wastewater, and at the same time the structure for the maintenance of the failure, wear, etc. of the machine and at the same time to achieve uniform inflow BOD, uniform flow rate.

As a preprocessing step so far is characterized by devices not in the basic existing environmental facilities primary treatment (aeration tank, the settling tank), secondary treatment (aeration tank, the settling tank) The facility to NH ₄ NO ₃ processes the anaerobic, aerobic, anaerobic, aerobic repeatedly And NO ₂ are removed and the aeration operation is operated intermittently.

The microbial state and habitat environment of the aeration tank satisfy the natural environment. About 60% of the aerobic microorganisms live in aerobic state. The most common microbial group is aerobic, random, and other bacteria such as organic matter, nitrogen and phosphorus. It is a mechanism that grows and inhabits while eating.

Therefore, this is described in more detail as follows.

The microorganisms are activated by immobilizing the microorganisms involved in the corrosion among the microorganisms inhabiting in nature, and filling the strainer type bioreacta in the primary treatment (aeration, sedimentation) and secondary treatment (aeration, sedimentation) facilities after pretreatment. It is injected into the culture tank for the high concentration of organic matter and nitrogen (N) phosphorus (P) to be treated efficiently and the treated water is highly treated compared to other treatment methods.

According to the method of the present invention, the treatment facility is about one third faster than the existing treatment facility, and it has excellent ability to impact load even when high load material is introduced, and high concentration organic wastewater as well as low concentration sewage and sewage pretreatment after the first treatment. Can be achieved.

In particular, the treatment methods so far include aerobic digestion, anaerobic digestion, two-stage activated sludge method, and long-term aeration method, but all of them are limited to organic matter removal. Especially, the color of wastewater is not treated. Many possessions have been occurring.

However, in the treatment method using the microorganism immobilization pallet of the present invention, unlike the treatment method up to now, even nitrogen (N) and phosphorus (P), which are microbial nutrients in the river, have an excellent treatment effect up to 90-97%, and the color of the wastewater is 3 It is a motivation for the present invention to obtain more treated water such as bottled water by treating it more completely in a primary treatment facility.

The primary and secondary treatment systems satisfy the natural environment in the culture tank by fixing a strain that decomposes nitrogen in the aeration tank for the wastewater after pretreatment in the culture tank. It is processed by microorganisms.

At this time, in the oxidative decomposition treatment facility, more than 1 kg of O ₂ having oxidizing power per kg of organic matter is added. However, the present invention has immobilized 4-5 ppm of microbial growth dissolved oxygen during oxidative decomposition because the immobilized anaerobic microorganisms and random microorganisms are immobilized. Since the existing oxidatively decomposed oxygen amount is intermittently operated for 1 hour and 1 hour, the maintenance cost is reduced by half. In this way, if it flows into the primary settling tank, it is rapidly aggregated and treated by gravity settling, and the secondary treatment is also repeated.

Therefore, the production of microbial immobilization using sludge in a corrosive or biological wastewater treatment liquid as a carrier tissue in primary and secondary treatment facilities will be described.

Microorganisms have various useful properties, such as the synthesis or decomposition of organic matters. 2 Modification of organic nitrogen. 3 Ammonia superoxidation. 4 Antimicrobial activity between microorganisms. 5 Decomposition and removal of harmful and toxic substances. 6 Generation of stable aggregates. It is a known fact that it has the production of substances.

The microorganism immobilization is also in the form of preservation, transportation and application of the useful microorganisms as described above, the amount of which greatly influences the availability to the microbial industry.

The immobilization of bacteria has been proposed for each of these circumstances, but the advantages of preservation, transportation, and application should not be utilized, and preservation and transportation are not as microbial immobilization, but are in the form of lyophilized fungi and culture primary colors. .

Although microorganism immobilization is such a large availability, the reason of the method of use is limited, The microorganism activity falls at the time of immobilization, or microorganisms are easy to die. After temporary fixation, there is a limit to the number of days that can be preserved in a state of sustaining activity. The proliferation days are required when praying for the growth of microorganisms using Namibio-immobilization. Etc.

The present inventors have been researching and preventing environmental pollution for 30 years, and as a carrier tissue when the sludge of corrosion and biological treatment lung fluid is immobilized while promoting research to improve the state of soil, which is changing year by year, by microorganisms. After discovering the fact that the advantages of the present invention and further research has reached the present invention.

In other words, the present invention is a microorganism immobilization, characterized in that it is formed from a gel material formed from a microbial or artificial culture: microbial medium: water-soluble silicic acid compound: the sludge of the corrosion or sludge treatment: To provide.

In the present invention, the term "corrosion" means a dark amorphous organic substance of soil erosion caused by decomposition of biofluid to various stages according to microorganisms.

Corrosion generally exists in the form of humus in nature, but artificially stacked weeds, deciduous seaweeds, and artificially stacked composts decomposed by microorganisms and sawdust laid in the barn are artificially stacked and decomposed by microorganisms. Composting is also a corrosion of the present invention.

Sludge of biological treatment lung disease is treated with sludge washing method, active sludge method, etc. already known, and sludge that has settled in treatment lung disease with wastewater treatment method using photosynthetic bacteria and its microbiota Sludge etc. that settle to pulmonary fluid.

The sludge of corrosion and biological treatment wastewater is common in that it consists of a mixture of organic matter decomposed to various stages and the killing of cells which grew with the decomposition of the organic matter. It can be a boon.

Furthermore, although both sludges of corrosion and biologically treated lung fluid have common living microorganisms living therein, the sludge of corrosion and biologically treated lung fluid of the present invention is a concept of a part except for the aforementioned living microorganisms. to be.

Microorganisms inhabiting erosion or sludge vary depending on the type of erosion, and there are many kinds of microorganisms in bush and oni. And these microorganisms are almost all difficult to identify their belonging and type.

However, corrosive and sludge-integrated microorganisms are often known empirically, so in the immobilization of microorganisms inhabiting nature, a culture medium suitable for the growth of microorganisms is prepared and mixed with electrocorrosion or sludge. After that, the mixture may be mixed with the water-soluble bacterium compound and gelated.

In the above immobilization, culture conditions other than the medium, such as temperature before and after mixing with the water-soluble silicic acid compound or gelling, are suitable for the growth of the microorganisms, and the activation of the microorganisms can be increased, and thereafter, the microorganisms can be immobilized as final products. Moreover, it is also possible to set it as the immobilized cell which selectively multiplyed and contained only the other microorganism naturally among the microorganisms which naturally inhabited by the so-called enrichment culture which repeats culture | cultivation in several media of the same composition.

When immobilizing microorganisms that do not inhabit or corrode sludge as a carrier, the difference between the inoculation of microorganisms and the selection of a composition suitable for the growth of microorganisms inoculated as a medium are different from those of the former. Is the same. Of course, it is not necessary to kill the microorganisms that naturally inhabited the corrosion or sludge. This is because they are naturally killed later or only many microorganisms which can coexist with the inoculated microorganisms remain without being killed.

The water-soluble silicic acid compounds are known for use in the formation of gels. For example, inorganic silicate compounds include potassium silicate, and organic silicate compounds include methyl silicate, ethyl silicate, propyl silicate, and beryl silicate. .

All of the above-mentioned organosilicate compounds become oligosilicic acid monomers by hydrolysis and exhibit gelation. At the same time, gaseous decomposition produces corresponding alcohols. The alcohol produced at this time has a harmful effect on many microorganisms that do not have alcohol resistance. Therefore, it is necessary to remove the alcohol by dropping, elution, heating, aspiration, and milking before or after gelation using the aforementioned organic silicate compound. There is.

In the microorganism immobilization of the present invention described above, since the sludge of the corrosive or biologically treated waste fluid is used as the carrier tissue, the shape of the gelled substance is maintained for a long time.

That is, the water-soluble silicic acid compound gels alone to become hydrous siliceous, but if left in the room, the gel immediately releases water and cannot be a gel that already functions. The gel material of the present invention used has the advantage that it does not easily release the water inside, and even the gel which has released water is likely to be undone again by being immersed in water again.

In addition, when a tissue of the carrier of the present invention is not only a nutrient source of microorganisms, which is corroded and sludge, but also used for soil fertilization using microorganism immobilization on soil, or reused as spawn or reinforcing bacteria for drainage treatment. It has the advantage of being familiar with fixation.

In other words, as a structure of the carrier, conventionally, synthetic polymers have also been proposed to be used in combination with water-soluble siliceous products. The microbial fixation of the present invention is lower than that of microorganism immobilization using synthetic polymers, and the rate at which microorganisms are killed at the time of preservation is small. It has the advantage of being accustomed to fixing easily. In the microorganism immobilization of the present invention, even when the soil is mixed with corrosion or sludge in the preparation thereof, these soils are easily used with water-soluble siliceous compounds, and therefore, silicic acid is originally contained in the soil as a major component.

It does not need to be removed, and thus has the advantage that sludge in various biological treatment liquids produced as natural products of humus and by-products can be used as it is.

As described above, the microorganism immobilization according to the present invention is suitable for use in rice fields, fields, etc. for fertilization of soil and for cultivation of corrosion, and for use as spawn or microbial enrichment bacteria for drainage treatment.

Hereinafter, the present invention will be described in more detail with reference to Examples.

Example 1

The first aeration tank is an anaerobic tank, and aquatic stirrers are installed on the bottom of the water to stir in an oxygen-free supply state, and a habitat environment for organizing anaerobes is created. When an anaerobic environment is formed, the modified anaerobic bacteria are transformed into ammonia nitrogen and combined into the proteins of cells, and the wastewater is introduced into the second aeration tank in the primary treatment facility.

BOD of 0,6kgBOD / m. Day or less is good, DO of the aeration tank is adjusted to around 1ppm and MLSS concentration is adjusted to within 8,000mg / l.

The aeration operation is operated intermittently at 1 hour intervals and is operated intermittently for 24 hours by allowing the rotary unit to operate automatically.

The 3rd and 4th aeration tanks are a repetition state of the 1st and 2nd aeration tanks, and a reaction tank which satisfies the natural environment of Article 2 is required, and the inside of this reaction tank is filled with a microbial fixation pallet in which microorganisms and cells are immobilized with humus soil. There is a reactor and microbial immobilization in the reactor makes the natural microbial habitat in the reactor.

The volume of the reactor should be about 1,5-2kgBOD / ㎥. BOD load of the influent wastewater and DO should be maintained at 0,1-0,8ppm.

The sedimentation tank should be 10m3 / m2 or less in surface direct load with the outflow channel outside, and the depth of the sedimentation tank should be about 3m to obtain clear treated water.

Example 2

It is the same as the electric primary treatment facility, but in the secondary treatment facility, the stirring pressure of the first aeration tank is required to be more than 1kg / cm, and the MLSS of the second aeration tank should be maintained within 6,000 mg / l and DO within 2 ppm. The time should be 1 hour intermittent operation.

The BOD load of the reactor should be 1.2 kg BOD / m 2. Day and DO is the same as in Example 1 above.

The surface area load of the settling tank was 8 m / m. One day or less and the depth is the same as in Example 1.

Example 3

Water 224 ml and ethyl silicate were added to 100 g of humus (corrosive 16%), and pH 3.0 was prepared in 2N-HCI, and stirred at room temperature for 2 and a half hours to prepare a uniform sol, followed by a medium (5 g of sodium propionate and 1 g of anmonium chloride). , Potassium phosphate 0,8g, magnesium chloride 0,2g, sodium chloride 0,1g, calcium chloride 0,05g, sodium bicarbonate 0,5g, yeast extract 0,2g, water 100ml (PH7.5) 36ml Add 72 ml of Rhodopseudomonas capsulata culture (incubated with 10-fold dilution medium), and stir to form a needle-like gel.The gel is cut into an appropriate size and immersed in running water for 2 and a half hours to ethanol. After the elution is removed, it is dried in water to obtain immobilized cells.The gel is incubated with light at 30 ° C in 10-fold dilution of an electric medium. do.

Example 4

The sol obtained in the same manner as in Example 3 was heated in a 70 ° C. hot water bath for 2 hours to evaporate ethanol as much as possible, and after cooling, the water was restored by moistening water. 36 ml of the same medium as in Example 3 and 72 ml of the rod schedmons scarveshrer were added to the isol, followed by stirring. The gel was immersed in a 10-fold dilution of the medium of Example 1, incubated with light at 30 ° C., and reddish on day 10. It becomes the multiplication microorganism fixation palette.

Comparative Example 1

100 g of 10% -PVA aqueous solution, 116 g of water, and 28.5 g of tetraethylsilicate were prepared in a vessel and prepared with PH2,5 with dilute hydrochloric acid, followed by stirring at room temperature for 2 hours to obtain a uniform sol. The culture solution of the rod-shudder scarf scarf was added to the same ratio as in Example 1, and the pH was returned to 7,5, followed by stirring and mixing to obtain gel-like microorganism immobilization immediately.

It is immersed in flowing water for 2,5 hours to elute and remove the alcohol, then take it out and soak it in copper medium (10-fold dilution) and incubate for 5 days while irradiating at 30 ℃ for 5 days.

Comparative Test Example 1

The microorganism-immobilized pallet obtained in Comparative Example 1 of the microorganism-immobilized pallet obtained in Example 3 was placed in a sealed container and stored at room temperature for 1 month, followed by a biodegradation experiment. That is, each microorganism immobilization palette was separately put in a 250 ml glass bottle, filled with a medium (which was diluted 10 times with the medium used in Example 3), filled with marzipan, and incubated with light at 30 ° C. The absorbance (660 mm) of the culture was measured over time.

Comparative Test Example 2

100 g of the microbial fixation palette obtained in Example 3 and the microbial fixation palette obtained in Comparative Example 1 were extracted and placed on a dryer, followed by drying at 30 ° C. for 3 days. After drying, each of them was placed in 100 ml of each beaker (cylindrical bowl used for chemical experiments), and 80 ul of the medium (the medium used in Example 1 was diluted 10 times) was filled with light, and cultured by irradiation at 30 ° C.

If the result of measuring the absorbance (660 mm) of the culture solution is displayed as follows, it is as follows.

This is difficult to lose activity when the microbial immobilization pallet of the present invention is immobilized and shelf life. When preserving and growing, this indicates that the effect can be expected both in terms of time and quantity.

Example 5

The microbial immobilization palette was obtained using the return sludge obtained from the photosynthetic bacterium treatment process of tofu waste liquid.

That is, return sludge 100, potassium silicate solution (reagent, Bio ₂ approximately 20%) 30 g, medium (15 g sodium propionate, ammonium lactic acid 1,5 g, potassium phosphate 2,4 g, magnesium lactate 0,6 g, sodium chloride 0,3 g, calcium chloride) 0,15g, sodium hydrogen carbonate 1,5g, yeast extract 0,6g, water 1 PH7,5) 120ml, water 110ml are mixed and adjusted to pH 7,5 in 2N-HCL, gelation and microbial fixation palette Obtained.

This was immersed in a 3-fold dilution of the above medium, light irradiation at 30 ° C. was repeated for seed culture, and a microbial fixation palette was obtained in which photosynthetic bacteria multiplied red.

Example 6

40 g of potassium silicate solution (20% of reagent Sio ₂ ), 100 g of humus soil (corrosion approximately 13%), 195 ml of water, medium (10 g of sodium sulfate, sodium phosphate 10 g, sodium thiosulfate 5 g, sodium sulfate 5 g, ammonium lactate 5 g , phosphoric acid) Add 8 g of potassium, 5 g of sodium bicarbonate, 36 ml of water 1, PH8,0) and 72 ml of Chromatium Vinosum, and stir to prepare the pH in 8.0 with 2N-HCI. Get a palette. When this is incubated with light at 30 ° C., it becomes a fresh microbial fixation palette on the 12th day of culture.

Example 7

Invisible fine oil-free by injecting membrane separation device combining ultrafiltration membrane (U / F) and reverse osmosis membrane (R / O) into tertiary advanced treatment facility as third advanced treatment facility in the whole treatment system A system that more completely treats the color of the wastewater in the material and the highly concentrated organic wastewater (manure, livestock waste, slaughterwater, landfill leachate, milk wastewater and other high concentration organic wastewater).

1 is a process diagram of the present invention.

* Description of the symbols for the main parts of the drawings *

1: Inlet 1 ': Inlet

2: inclined distribution tank 3: inlet shooter knife gate

4: Rotary screen screw press 5: Rotary screen inflow side bypass line

6: outflow pipe 7: sedimentation hopper injection tank

8: wastewater transfer pump 9: wastewater transfer pump

10: wedge screen inflow side bypass line 11: wedge screen

12: wedge screen outflow pipe 13: inclined storage tank

14 wastewater transfer pump 15 wastewater transfer outflow pipe

16: wastewater quantitative supply bypass line 17: anaerobic tank inlet mixing tank

18: anaerobic tank 19: agitator

20: aerobic tank 21: aerobic digestive tank

22: Aerobic Extinguishing Tank Outflow Building 23: Onirki

24 Cyclo Reducer 25 Rectified Wall

26: sedimentation tank 27: sedimentation tank outlet pipe

28: Reacta 29: discharge tank

30: discharge pipe 31: sludge feed pump

32: Return Officer 33: Surplus Onine

34: concentration tank 35: sludge feed pump

36: surplus sludge dehydration line 37: dehydrator

Existing environmental foundation facilities such as manure, animal husbandry, sewage, sewage, and industrial wastewater, which are existing in Korea, have numerous treatment methods and installations, but they do not properly handle organic matters (BOD), suspended solids (SS), etc. Nitrogen, phosphorus and the like have been almost excluded from the treatment method. However, in the government, hundreds of manure, manure and sewage treatment facilities nationwide treat only BOD and SS within about 80% even though they have invested a lot of budget. Only the BOD and SS can be treated only when the treatment technology is required. Even this lack of technology, lack of management, etc. have led to the present invention because it is a pity that the rivers in the country are contaminated with pollution.

The present invention maintains a high concentration of organic substances such as manure and livestock waste (BOD), hardly decomposable substances, high concentrations of nitrogen, phosphorus, etc. by aerobic microorganisms to maintain high concentrations of MLSS in aeration tanks based on the conventional purification mechanisms, but the active sludge method It is a method of stabilizing microorganisms decomposing hardly decomposable substances by increasing the average residence time of the operating parameters of the present in the MLSS.

In the treatment of high concentrations of organic matter, nitrogen, phosphorus, hardly decomposables, etc., the MLSS of the aeration tank is maintained at a high concentration, thereby facilitating the packaging of the treatment plant facilities, and thus, there is a merit that the facility cost and the land area are significantly reduced than the existing treatment facilities.

Therefore, the high-density treatment method for removing nitrogen and phosphorus in high concentrations induces microbial assetization in the aeration tank and reduces the discharged sludge as much as possible. By maintaining the MLSS concentration of the aeration tank at a high concentration, the amount of excess sludge is also reduced, so that the amount of dehydration catalyst is reduced. Since the emissions are low, the maintenance cost is low and high efficiency treatment water is obtained, which causes various national benefits to prevent river pollution and restore the ecosystem.

Claims (3)

Pre-treatment systems and systems, reactor lines and reactors from 1-16 of the pretreatment system, plumbing lines and primary and secondary treatment facilities. Sludge Corrosion or Biological Treatment Sludge Microbial immobilization production, characterized in that it consists of a microorganism, a medium for electric microorganisms, a gel-like substance formed from a water-soluble siliceous compound, whether or not inhabited or incubated in sludge. Third advanced treatment facility system, ultrafiltration and reverse osmosis membrane device.