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WO2018147709A1 - Dispositif et procédé de traitement des eaux usées - Google Patents

Dispositif et procédé de traitement des eaux usées Download PDF

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Publication number
WO2018147709A1
WO2018147709A1 PCT/KR2018/001881 KR2018001881W WO2018147709A1 WO 2018147709 A1 WO2018147709 A1 WO 2018147709A1 KR 2018001881 W KR2018001881 W KR 2018001881W WO 2018147709 A1 WO2018147709 A1 WO 2018147709A1
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WIPO (PCT)
Prior art keywords
tank
sludge
nitrate nitrogen
anoxic
anoxic tank
Prior art date
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Ceased
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PCT/KR2018/001881
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English (en)
Korean (ko)
Inventor
박민석
배시열
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Biomecca Co Ltd
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Biomecca Co Ltd
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Filing date
Publication date
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Anticipated expiration legal-status Critical
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/006—Regulation methods for biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/15—N03-N
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to a wastewater treatment apparatus and method.
  • An object of the present invention is to provide an efficient and stable wastewater treatment apparatus and treatment method.
  • the present invention to achieve the above object
  • a flow adjusting tank 2 for equalizing the flow rate and the concentration of the influent water, which is sewage or waste water;
  • a denitrification reaction of the sludge introduced from the first anoxic tank (3) by the denitrification microorganism and the activated sludge returned from the aeration tank (6) by the denitrification microorganism occurs, and also the above-mentioned A second anoxic tank (4) in which phosphorus release is caused by denitrification microorganisms;
  • a microbial activity control aeration tank (5) in which the oxidation reaction of organic matter in the sludge flowing from the second anoxic tank (4), the nitrification reaction of ammonia nitrogen to nitrite nitrogen or nitrate nitrogen, and the absorption of phosphorus by microorganisms occur;
  • a blower 18 intermittently supplying air to the second anoxic tank 4 according to the concentration of nitrate nitrogen measured by the nitrate nitrogen measuring device 19;
  • a wastewater treatment apparatus (1) Provided is a wastewater treatment apparatus (1).
  • the denitrifying microorganisms denitrify nitrite nitrogen and nitrate nitrogen contained in the activated sludge returned from the sludge introduced from the first anoxic tank (3) and the aeration tank (6), and also release the phosphorus by the denitrifying microorganism.
  • Step 2 anoxic tank (4);
  • the nitrate nitrogen concentration of the activated sludge returned from the aeration tank 6 to the second anoxic tank 4 is measured, and the nitrate nitrogen measurement device 19 measures the nitrate nitrogen concentration.
  • the wastewater treatment apparatus 1 and the wastewater treatment method of the present invention can stably and efficiently remove the organic matter of the wastewater.
  • the wastewater treatment apparatus 1 and the wastewater treatment method of the present invention can control nitrogen and phosphorus in the wastewater to less than the discharged water quality standard of the wastewater treatment plant, and the biological in the flow regulating tank (2) even in the case of temporary high concentration wastewater inflow such as initial rainfall. By enabling decomposition, stable and continuous treatment is possible even with temporary and sudden concentration changes of the influent.
  • FIG 1 shows the structure of the wastewater treatment apparatus 1 of the present invention.
  • the present invention is a.
  • a flow adjusting tank 2 for equalizing the flow rate and the concentration of the influent water, which is sewage or waste water;
  • a denitrification reaction of the sludge introduced from the first anoxic tank (3) by the denitrification microorganism and the activated sludge returned from the aeration tank (6) by the denitrification microorganism occurs, and also the above-mentioned A second anoxic tank (4) in which phosphorus release is caused by denitrification microorganisms;
  • a microbial activity control aeration tank (5) in which the oxidation reaction of organic matter in the sludge flowing from the second anoxic tank (4), the nitrification reaction of ammonia nitrogen to nitrite nitrogen or nitrate nitrogen, and the absorption of phosphorus by microorganisms occur;
  • An external carbon injection device 20 for selectively supplying carbon to the second anoxic tank 4 according to the concentration of the nitrate nitrogen;
  • a blower 18 causing intermittent aeration in the second anoxic tank 4 in accordance with the concentration of the nitrate nitrogen
  • microbial activity adjustment aeration tank (5) Located in the microbial activity adjustment aeration tank (5), and includes a microbial agent containing soil microorganisms and inorganic substances, Bacillus megaterium DSM3 deposited with KFCC-11402P,
  • the carbon is supplied from the external carbon injection device 20 to the second anoxic tank (4),
  • the stirring is performed in the second anoxic tank (4), and the carbon is supplied from the external carbon injection device (20) to the second anoxic tank (4), the second Promotes denitrification and phosphorus release in the anaerobic bath (4),
  • the wastewater treatment apparatus 1 of the present invention is an apparatus for treating wastewater generated in a factory, home city life, or the like.
  • the wastewater treatment apparatus 1 of the present invention removes organic substances, nitrogen, phosphorus and other nutrients, suspended substances and total phosphorus (TP) from the introduced wastewater, and discharges them into the effluent that satisfies the predetermined limit water quality (water pollution prevention method). Device.
  • the wastewater treatment apparatus 1 of the present invention includes a plurality of reaction tanks, specifically, as shown in FIG. 1, the flow rate adjusting tank 2, the first anoxic tank 3, the second anoxic tank 4, and the microbial activity adjusting aeration tank 5. ), Aeration tank (6), final settling tank (7), physicochemical aftertreatment device (8) and disinfection treatment device (9) in sequence, each reactor being a wastewater line, a return line, an air supply line and / or a chemical It is connected by the same line (water pipe) as a line. Wastewater, sludge, air, chemicals and the like are transferred through the line.
  • the wastewater treatment apparatus 1 of the present invention will be described with reference to FIG. 1.
  • the sewage and / or wastewater (inflow water) to be treated flows into the flow rate adjusting tank 2.
  • the flow adjusting tank 2 may enter the solids conveyed from the physicochemical aftertreatment device 8 through the conveying line 16 and / or the settling sludge conveyed from the final sedimentation tank 7 through the conveying line 12. have.
  • the flow regulating tank 2 precipitates the inflow of inflow into the flow regulating tank 2, that is, sewage and / or waste water (hereinafter referred to as “waste water”) and equalizes the amount and concentration of the waste water, thereby allowing a constant flow rate.
  • the excess concentration of influent is sent to the first anaerobic tank (3).
  • the flow rate adjusting tank 2 allows the subsequent processes leading to the first anoxic tank 3, the second anoxic tank 4, and the like to proceed smoothly.
  • Settling sludge is introduced into the flow rate adjusting tank 2 from the final settling tank 7 through the conveying line 12, and when the wastewater of high concentration is temporarily introduced by the microorganisms included in the introduced settling sludge, for example, during initial rainfall. Biodegradation is possible in the flow regulating tank (2).
  • the method of adjusting the flow rate adjusting tank 2 is a method known in the art (for example, an in-line method or a parallel method) in consideration of fluctuation patterns of incoming wastewater, amount of water, water supply method, control method, and the like. off-line), etc.) may be used as appropriate, and is not particularly limited.
  • the role of the flow regulating tank 2 may be different depending on the size of the sewage treatment plant. That is, in the case of a large sewage treatment plant, since the flow distance is long, the change in the amount and concentration of influent sewage water is not large, so that the weight of the flotation sediment function is greater than the equalization of the amount and concentration of sewage water. On the other hand, in the case of small sewage treatment plants, since the flow distance is short, the amount and concentration of the sewage wastewater is largely changed, and therefore, the weighting process of the wastewater wastewater equalization process is large.
  • the influent flowing through the flow adjusting tank 2 flows into the first anoxic tank 3.
  • the settling sludge returned from the final settling tank 7 is also introduced into the first anoxic tank 3 via the conveying line 11.
  • a stirring mixer 17 is located in the first anoxic tank 3.
  • the stirring mixer is stirred and mixed with the inlet water and the settling sludge flowing from the flow adjusting tank (2) together with the denitrifying microorganisms. This prevents the settling sludge from being settled in the first anoxic tank 3.
  • the settling sludge returned from the final settling tank 7 also contains organic matter and nitrate nitrogen (NO 3 ), by which the denitrifiers reduce, ie, denitrify, the nitrate nitrogen.
  • the denitrification microorganism performs the denitrification reaction using the organic material contained in the inflow water introduced from the flow rate adjusting tank 2 as a carbon source, in the following ⁇ Formula 1>.
  • the nitrate nitrogen is reduced to nitrogen gas (N 2 ) by the denitrification reaction, and the reduced N 2 is exhausted and removed to the atmosphere.
  • the sludge passed through the first anaerobic tank 3 flows into the second anaerobic tank 4.
  • the sludge contains residual organics, nitrite nitrogen (NO 2 -N) and nitrate nitrogen (NO 3), which are residues which have not been consumed by denitrification in the first anaerobic bath 3.
  • activated sludge conveyed from the aeration tank 6 also flows into the second anoxic tank 4 via the conveying line 13. Residual organics, nitrite nitrogen (NO 2 -N) and nitrate nitrogen (NO 3 ) are also included in the activated sludge, which are also those which have not been denitrified in the previous processes.
  • the external carbon injection device 20 is a separate device including a storage tank and an injection pump, and has a low concentration of organic matter in the sewage or wastewater flowing into the sewage water treatment device, and when organic matter is insufficient for denitrification, the organic material is removed for denitrification. Inject additionally.
  • a stirring mixer 17 is located in the second oxygen-free tank 4.
  • the sludge introduced from the first anoxic tank (3) and the activated sludge returned from the aeration tank (6) contain denitrifying microorganisms, and the stirring mixer is provided from the sludge and aeration tank (6) flowing from the first anoxic tank (3).
  • the returned activated sludge is stirred and mixed with the denitrifying microorganisms. Thereby, reaction, such as denitrification, is accelerated
  • the denitrification microorganism performs denitrification of the organic material contained in the inflow water and the organic material injected from the external carbon injection device 20 as a carbon source.
  • the nitrate nitrogen is secondary denitrification within a short time, and at the same time, the phosphorus is released by the microorganisms which absorbed the phosphorus for growth in the aeration tank.
  • the phosphorus release occurs in the second anaerobic tank 4 as phosphorous release due to carbon source contact in the anaerobic state, whereby the second anoxic tank 4 also serves as an anaerobic tank. This phosphorus release occurs in the first anoxic tank 3 and the second anoxic tank 4.
  • Air may be supplied to the second anaerobic tank 4 from the blower 18 through the air supply line 15.
  • the air may be supplied and operated in an intermittent aeration manner by a timer.
  • a timer For example, when the concentration of nitrate nitrogen (NO 3 ) in the activated sludge conveyed through the conveying line 13 from the aeration tank 6 to the second anoxic tank 4 is low (i.e., less than 10 mg / L, the nitrification is furthermore). If necessary), intermittent aeration and agitation are performed together in the second anoxic tank 4, resulting in a residual nitrification and denitrification process.
  • NO 3 nitrate nitrogen
  • Carbon is supplied from the external carbon injection device 20 to the second anoxic tank 4.
  • concentration of nitrate nitrogen measured using the nitrate nitrogen measuring device 19 that is, 10 mg / L or more
  • the external carbon injection device 20 operates to supply carbon to the second anoxic tank 4. Done.
  • concentration of nitrate nitrogen measured using the nitrate nitrogen measuring device 19 is low or in the normal range
  • the external carbon injection device 20 does not operate and the carbon supply to the second anoxic tank 4 is stopped. do.
  • the nitrate nitrogen measuring apparatus 19 continuously measures the concentration of nitrate nitrogen (NO3) in the activated sludge conveyed through the conveying line 13 from the aeration tank 6 to the second anoxic tank 4.
  • the operation of the second anoxic tank (4), the aeration tank (6) and the external carbon injector 20 is controlled according to the concentration of the nitrate nitrogen, which is measured in this way.
  • the nitrate nitrogen concentration is high, this means excessive nitrification.
  • only the stirring is performed in the second anoxic tank (4).
  • the activated sludge conveyed through the conveying line 13 to promote the nitrification and phosphorus absorption which is insufficient in the microbial activity adjusting aeration tank 5 is intermittently aerated in the second anoxic tank 4 (aeration). And alternating operation of the toilet, nitrification and phosphorus absorption occur during aeration, and denitrification and phosphorus release occur during the aeration. That is, in the case where the nitrate nitrogen concentration is low, the stirring is performed only during the rest of the intermittent aeration in the second anoxic tank (4).
  • nitrate nitrogen (NO3) in the returned activated sludge is 10 mg / L or more, it is determined that nitrification is normally performed in the aeration tank 6. In this case, therefore, in the second anoxic tank 4, only stirring is performed to induce denitrification and phosphorus release.
  • the nitrate nitrogen in the returned activated sludge (NO3) is less than 10 mg / L
  • the nitrification and phosphorus absorption process and the denitrification are carried out by performing intermittent aeration and stirring in the second anoxic tank 4 to induce nitrification and phosphorus absorption process.
  • the phosphorus release process takes place alternately (Table 1).
  • the sludge passed through the second anaerobic tank (4) is introduced into the microbial activity adjustment aeration tank (5).
  • the microorganism control tank 10 is present in the microbial activity control aeration tank 5, and the concentration of microorganisms in the microbial activity adjustment aeration tank 5 is maintained mainly by the amount of external conveyed sludge returned from the final precipitation tank 7.
  • the microbial activity adjustment aeration tank (5) there are large amounts of soil microorganisms, general aerobic microorganisms and nitrifiers which are not soil microorganisms.
  • the microorganisms use the air supplied from the blower 18 through the air supply line 14 to grow and multiply the organic matter in the sludge, and perform nitrification of the nitrifying microorganisms. At this time, the air is preferably supplied continuously.
  • Nitrifying microorganisms nitrify ammonia nitrogen (NH 4 + ) into nitrite nitrogen (NO 2 -N) and nitrite nitrogen into nitric acid (NO 3) in the microbial activity control aeration tank (5).
  • H + is produced by this nitrification reaction (Equation 4) to consume alkalinity, which corresponds to 7.14 g of CaCO 3 per 1 g of ammoniacal nitrogen. Due to this alkalinity consumption, the pH in the microbial activity adjustment aeration tank 5 is reduced.
  • the microorganism control tank 10 includes a microbial agent consisting of several substances collected in a natural state.
  • the microbial agent is inoculated into a biocrack by separating and mass cultivating a specific soil microorganism (eg, Bacillus megaterium DSM3, Accession No .: KFCC-11402P), including Bacillus spp. and Ca 2 +, and rich in the inorganic material, such as Mg + 2.
  • Sludge in the microbial activity adjustment aeration tank 5 is introduced into the microorganism control tank 10, by which the organic matter and nutrients for the growth and growth of microorganisms are supplied to the microorganism control tank 10.
  • the soil microorganisms and the general microorganisms eluted from the bioclave coexist, and as time passes, the soil microorganisms predominate over the general microorganisms.
  • the absorption of phosphorus released by the microorganisms in the second anoxic tank 4 occurs.
  • Absorption of phosphorus occurs during the growth and proliferation of aerobic microorganisms including nitrifying and soil microorganisms.
  • the release of phosphorus in anaerobic conditions followed by the absorption of phosphorus in aerobic conditions is much greater than the amount required for the cellular structure of the microorganism. This is called "luxury uptake" because it absorbs phosphorus.
  • the aeration tank (6) is supplied with air from the blower (18) through the air supply line 14, by using this to grow and multiply the microorganisms in the aeration tank (6).
  • the microorganism decomposes and removes organic matter in the aeration tank 6 during the growth and propagation of microorganisms, and completely oxidizes ammonia nitrogen which has not been oxidized in the microbial activity adjustment aeration tank 5 to nitrite nitrogen and nitrate nitrogen.
  • the soil microorganism is activated by the microbial preparation in the microbial adjustment tank 10, and the soil microorganisms are continuously supplied to the microbial activity adjustment aeration tank (5) and aeration tank (6) to buffer the impact load of the influent sewage.
  • the sludge discharged from the aeration tank flows into the final settling tank 7 through the channel.
  • the final settling tank inorganic coagulant injector 21 is directly or indirectly connected to the channel connected to the final settling tank 7 from the aeration tank 6.
  • the final precipitation tank inorganic coagulant injector 21 injects the inorganic coagulant into the sludge transferred from the aeration tank 6 to the final precipitation tank (7).
  • the sludge introduced into the final settling tank 7 is separated into solids (precipitated sludge) and liquid phase (supernatant) by gravity, and the separation efficiency is enhanced by the inorganic coagulant injection.
  • the settling sludge which is the solid separated in the final settling tank 7 is returned to the first anoxic tank 3 through the conveying line 11 or to the flow rate adjusting tank 2 via the conveying line 12.
  • the conveying may occur selectively or simultaneously.
  • the liquid supernatant is transferred to the physicochemical aftertreatment device 8 through the water channel.
  • the supernatant discharged from the final settling tank (7) is introduced into the physicochemical aftertreatment unit (8) through the channel.
  • An inorganic coagulant injector 22 for physicochemical treatment is directly or indirectly connected to the channel from the final settling tank 7 to the physicochemical aftertreatment device 8.
  • the inorganic coagulant injector 22 for the physicochemical treatment injects the inorganic coagulant into the supernatant water transferred from the final settling tank 7 to the physicochemical post-treatment device 8.
  • the supernatant with the inorganic coagulant is separated into solids and liquids by flotation or filtration in the physicochemical aftertreatment device (8).
  • the solid material is transferred to the flow rate adjusting tank 2 through the conveying line 16, and the liquid from which SS (Suspended Solids) and TP (Total Phosphate) are removed is sterilized through a disinfection apparatus (9). Final discharge.
  • the liquid introduced from the physicochemical aftertreatment apparatus 8 is disinfected by UV treatment.
  • the liquid is disinfected and finally discharged as final effluent.
  • Activated sludge return line internal return: return from aeration tank 2 in an aeration tank inside a bioreactor
  • activated sludge tank air supply line (pipe connected to the blower which mainly supplies air to the microbial active adjustment aeration tank (5) and the aeration tank (6) and, depending on the situation, to the second anoxic tank (4))
  • the sewage treatment apparatus 1 having the structure of FIG. 1 was manufactured on a laboratory scale. Each reactor was made of transparent acrylic with visible inside, and the sewage flowing into the sewage treatment plant was directly collected and used for the experiment. Specific reactor specifications are shown in Table 2, and Bacillus megaterium DSM3 (Accession No .: KFCC-11402P) was used as the soil microorganism.
  • the sewage as a sample was introduced, and the BOD, T-N, and T-P of the influent, the seed effluent and the final effluent were measured. And the measurement result was computed by the average concentration over the driving period.
  • the amount of sewage used as a sample was 30 L per day, and the incoming wastewater was supplied using a metering pump and a timer to ensure accuracy.
  • the transport of the treated materials (ie sewage, sludge, etc.) in each reactor was installed in a natural flow method using potential energy, and the sludge was returned to the correct amount using a metering pump and a timer.
  • Example 1 Even without the microorganism control tank 10, the wastewater treatment apparatus as in Example 1 was installed, and the experiment was performed in the same manner.
  • Example 2 A sewage treatment apparatus as in Example 1 was installed without using the nitrate nitrogen measuring apparatus 19, and the experiment was conducted in the same manner.
  • the influent water (sewage flowing into the wastewater treatment apparatus 1) of Example 1 was BOD 151.1mg / L, TN 34.6mg / L, and TP 4.3mg / L, which was the wastewater treatment apparatus 1 of the present invention.
  • the final effluent was very good with BOD 1.7mg / L, TN 11.4mg / L, TP 0.15mg / L, which satisfies BOD, TN, TP sewage treatment plant standards 5, 10, 0.2mg / L.
  • Table 3 The result was shown (Table 3).
  • the present invention relates to a wastewater treatment apparatus 1 and a wastewater treatment method.

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Abstract

L'invention concerne un dispositif de traitement des eaux usées et un procédé de traitement des eaux usées, comprenant : un réservoir de régulation de débit ; un premier réservoir anoxique ; un second réservoir anoxique ; un réservoir d'aération de régulation d'activité des micro-organismes ; un réservoir d'aération pour acheminer une boue vers le second réservoir anoxique ; un réservoir de décantation finale pour acheminer la boue décantée vers le premier réservoir anoxique ; un dispositif de post-traitement physique et chimique destiné à éliminer les solides en suspension et le phosphore total dans un surnageant ; un dispositif de traitement de désinfection pour désinfecter le surnageant ; et une pluralité de lignes de transport ; un dispositif de mesure d'azote des nitrates ; un système d'injection de carbone externe ; une soufflante d'air ; et une préparation de micro-organismes qui est placée dans ledit réservoir d'aération de régulation d'activité des micro-organismes et qui alimente un micro-organisme de sol, Bacillus megaterium DSM3, déposé avec le numéro de dépôt KFCC-11402P, dans le réservoir d'aération de régulation d'activité des micro-organismes et le réservoir d'aération.
PCT/KR2018/001881 2017-02-13 2018-02-13 Dispositif et procédé de traitement des eaux usées Ceased WO2018147709A1 (fr)

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