CN113233594A - Low-oxygen aeration AOA-SBBR short-range nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated municipal sewage treatment method - Google Patents
Low-oxygen aeration AOA-SBBR short-range nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated municipal sewage treatment method Download PDFInfo
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- CN113233594A CN113233594A CN202110532485.9A CN202110532485A CN113233594A CN 113233594 A CN113233594 A CN 113233594A CN 202110532485 A CN202110532485 A CN 202110532485A CN 113233594 A CN113233594 A CN 113233594A
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- anaerobic ammonia
- ammonia oxidation
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 58
- 230000003647 oxidation Effects 0.000 title claims abstract description 57
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 54
- 239000010865 sewage Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005273 aeration Methods 0.000 title claims abstract description 37
- 239000001301 oxygen Substances 0.000 title claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 16
- 230000008878 coupling Effects 0.000 title claims description 39
- 238000010168 coupling process Methods 0.000 title claims description 39
- 238000005859 coupling reaction Methods 0.000 title claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 29
- 239000011574 phosphorus Substances 0.000 claims abstract description 29
- 241001453382 Nitrosomonadales Species 0.000 claims abstract description 21
- 239000000945 filler Substances 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 239000010802 sludge Substances 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 19
- 238000012544 monitoring process Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 3
- 241000894006 Bacteria Species 0.000 abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052799 carbon Inorganic materials 0.000 abstract description 17
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 12
- 150000004676 glycans Chemical class 0.000 abstract description 9
- 229920001282 polysaccharide Polymers 0.000 abstract description 8
- 239000005017 polysaccharide Substances 0.000 abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- 229910002651 NO3 Inorganic materials 0.000 description 4
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 2
- 208000037534 Progressive hemifacial atrophy Diseases 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012017 passive hemagglutination assay Methods 0.000 description 2
- 229920000903 polyhydroxyalkanoate Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000108664 Nitrobacteria Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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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
- C02F3/30—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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Abstract
An integrated municipal sewage treatment method of low-oxygen aeration AOA-SBBR short-range nitrification anaerobic ammonia oxidation coupled denitrification dephosphorization, which belongs to the technical field of sewage biological treatment. Sewage enters the SBBR through a water inlet pump, is anaerobically stirred, easily degradable organic matters in the water are stored as an internal carbon source by denitrifying phosphorus accumulating bacteria and denitrifying glycan bacteria, and NH is carried out by ammonia oxidizing bacteria in an aerobic aeration stage4 +Oxidation of-N to NO2 ‑N, and NO generated by anaerobic ammonia oxidizing bacteria under the condition of micro-anoxic environment inside the filler2 ‑-N and NH4 +Conversion of-N to N2Denitrifying, and denitrifying the residual NO by denitrifying phosphorus accumulating bacteria and denitrifying polysaccharide accumulating bacteria in anoxic stage2 ‑‑N、NO3 ‑N and removing phosphorus in the sewage. The method couples short-cut nitrification, anaerobic ammonia oxidation and denitrification dephosphorization into one SBBR reactor, and can carry out advanced treatment on the municipal sewage on the basis of saving energy and fully utilizing carbon sources.
Description
Technical Field
The invention relates to an integrated municipal sewage treatment method of low-oxygen aeration AOA-SBBR short-range nitrification anaerobic ammonia oxidation coupled denitrification dephosphorization, belonging to the technical field of biological sewage treatment.
Background
The nitrogen and phosphorus in the sewage are discharged out of the standard, which causes the large-area eutrophication of water body in China, the water body discharge standard is becoming strict day by day and the like, so that the research of nitrogen and phosphorus removal of the existing sewage is urgently needed to be developed towards the direction of high efficiency and low energy consumption.
Biological denitrification is generally based on a traditional nitrification-denitrification system, and aiming at the characteristic of generally low water quality of C/N of urban sewage, the denitrification is realized by selecting an additional carbon source, so that the sewage treatment cost is greatly increased, the shortage of the carbon source becomes the bottleneck of sewage denitrification and dephosphorization, and the aeration quantity required by the whole-course nitrification in the traditional process is high, so that the biological denitrification is the main reason of high energy consumption of a sewage plant. In addition, in the traditional single-sludge system, the sludge ages of various microorganisms such as phosphorus accumulating bacteria, denitrifying bacteria and nitrobacteria for realizing the maximum functions are different, and the competitive relationship with a carbon source is realized, so that the high-efficiency nitrogen and phosphorus removal cannot be realized at the same time. Therefore, it is important to provide an energy-saving process for nitrogen and phosphorus removal of low C/N sewage.
The invention realizes the synergistic effect of the bacteria in the denitrification and dephosphorization process by providing the micro-ecological environment which is respectively beneficial to the ammonia oxidizing bacteria, the anaerobic ammonia oxidizing bacteria, the denitrifying phosphorus accumulating bacteria and the denitrifying polysaccharide bacteria. Compared with the traditional biological nitrogen and phosphorus removal process, the short-cut nitrification anaerobic ammonia oxidation (PN/A) nitrogen removal can save 100 percent of organic carbon source and 62.5 percent of aeration consumption, reduce 90 percent of sludge yield, and can more effectively utilize the carbon source in the sewage and a small part of nitrate nitrogen generated by anaerobic ammonia oxidation through the denitrification phosphorus removal, thereby solving the competition contradiction of the denitrification and the phosphorus removal on the carbon source.
Disclosure of Invention
The invention aims to provide an integrated municipal sewage treatment method of low-oxygen aeration AOA-SBBR short-range nitrification anaerobic ammonia oxidation coupled denitrification dephosphorization, which solves the problems of insufficient carbon source in the traditional denitrification process and nitrate nitrogen in effluent of PNA technology. The process flow is simple and the operation cost is low. The method combines the advantages of short-cut nitrification, anaerobic ammonia oxidation and denitrification dephosphorization, and can realize high-efficiency and energy-saving treatment of the municipal sewage.
The technical principle of the invention is as follows: the synergistic coupling effect of the four bacteria in the aspects of nitrogen and phosphorus removal is realized by providing a micro-ecological environment which is beneficial to main functional bacteria such as shortcut nitrifying bacteria, anaerobic ammonium oxidation bacteria, denitrifying phosphorus accumulating bacteria, denitrifying polysaccharide accumulating bacteria and the like; firstly, storing an internal carbon source for denitrifying phosphorus accumulating bacteria and denitrifying polysaccharide accumulating bacteria in an anaerobic environment, and then, carrying out NH (hydrogen) oxidation by using ammonia oxidizing bacteria in an aerobic aeration stage4 +Oxidation of-N to NO2 -N, and NO generated by anaerobic ammonia oxidizing bacteria under the condition of micro-anoxic environment inside the polyurethane sponge filler2 --N and NH4 +Conversion of-N to N2Denitrifying, and denitrifying the residual NO by denitrifying phosphorus accumulating bacteria and denitrifying polysaccharide accumulating bacteria in anoxic stage2 --N、NO3 -N and removing phosphorus in the sewage.
The purpose of the invention is solved by the following technical scheme: the low-oxygen aeration AOA-SBBR short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated municipal sewage treatment method is used for treating low-C/N municipal sewage and is characterized by comprising a municipal sewage raw water tank (1), a short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2), an effluent water tank (3) and an online monitoring and feedback control system (4); the urban sewage raw water tank (1) is connected with the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2) through a first water inlet pump (2.1), and the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2) is connected with the water outlet tank (3) through an electric drain valve (2.6);
the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor is internally provided with a stirring paddle (2.3), an air pump (2.7), a gas flowmeter (2.9), an aeration disc (2.10), an electric drain valve (2.6), a DO sensor (2.12) and a pH sensor (2.13);
the on-line monitoring and feedback control system (4) comprises a computer (4.1) and a programmable process controller (4.2), wherein the programmable process controller (4.2) is internally provided with a signal converter AD conversion interface (4.3), a signal converter DA conversion interface (4.4), a stirring relay (4.5), a water inlet pump relay (4.6), a water drainage electric valve relay (4.7) and an aeration relay (4.8); wherein, a signal AD conversion interface (4.3) on the programmable process controller (4.2) is connected with the computer (4.1) through a cable, and converts the analog signal of the sensor into a digital signal and transmits the digital signal to the computer (4.1); a computer (4.1) is connected with a programmable process controller (4.2) through a signal converter DA (4.4) conversion interface, a digital instruction of the computer (4.1) is transmitted to the programmable process controller (4.2), a stirrer relay (4.5) is connected with a stirrer (2.2), a water inlet pump relay (4.6) is connected with a water inlet pump (2.1), a water discharge electric valve relay (4.7) is connected with a water discharge electric valve (2.6), an aeration relay (4.8) is connected with an electromagnetic valve (2.8), and a DO sensor (2.12) and a pH sensor (2.13) are respectively connected with a DO and a pH determinator (2.11).
The sewage treatment process in the device comprises the following steps: urban sewage enters a SBBR reactor (2) from a raw water tank (1) through a water inlet pump (2.1) and is integrated with partial nitrification, anaerobic ammonia oxidation, denitrification and dephosphorization; anaerobic stirring is carried out to complete the absorption of the easily degradable carbon source in the sewage, and the denitrifying polysaccharide bacteria and the denitrifying phosphorus accumulating bacteria convert the carbon source in the sewage into PHAs to be stored in cells. And then, carrying out hypoxia aeration, oxidizing ammonia nitrogen in the sewage into nitrite nitrogen by ammonia oxidizing bacteria, wherein the inner layer of the filler is in a micro-hypoxia environment due to oxygen mass transfer resistance, and the anaerobic ammonia oxidizing bacteria carry out anaerobic ammonia oxidation reaction by using the nitrite nitrogen generated by the ammonia oxidizing bacteria to convert the ammonia nitrogen and the nitrite nitrogen into nitrogen for denitrification. Then anoxic stirring is carried out, the denitrifying polysaccharide bacteria and the denitrifying phosphorus accumulating bacteria carry out denitrification by utilizing an internal carbon source stored in cells in an anaerobic stage, and the residual nitrite nitrogen in the sewage and a small part of nitrate nitrogen generated by anaerobic ammonia oxidation are converted into nitrogen for deep denitrification. And finally carrying out precipitation. The effluent is discharged through an electric drain valve (2.6).
The invention also provides a specific starting and operating steps of the integrated low-C/N urban sewage treatment method for realizing low-oxygen aeration AOA-SBBR short-range nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization, which comprises the following steps:
1) and (3) starting a system:
the polyurethane sponge filler attached with the ammonia oxidizing bacteria and the anaerobic ammonia oxidizing bacteria biomembrane is hung on a filler rack in a short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor, the outer layer of the filler is the ammonia oxidizing bacteria, the inner part of the filler is the anaerobic ammonia oxidizing bacteria, and the sludge concentration of the filler biomembrane is 3000-4000 mg/L. And adding the floccule sludge domesticated and having denitrifying phosphorus removal and endogenous denitrifying property into a short-cut nitrification anaerobic ammonia oxidation coupling denitrifying phosphorus removal integrated SBBR reactor to ensure that the floccule sludge concentration reaches 1500-2000 mg/L. The proportion of the filler to the biomass in the floc sludge is not limited.
2) And (3) adjusting operation during operation:
adding municipal sewage into a municipal sewage raw water tank (1), starting a first water inlet pump (2.1) to pump the municipal sewage into a shortcut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2).
When the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor operates, firstly carrying out anaerobic stirring for 120min per period, then starting aeration and stirring, controlling the dissolved oxygen concentration in the reactor to be 0.04-0.1mg/L, carrying out aeration for 360min, then carrying out anoxic stirring for 180min, and discharging water after settling for 30 min.
When the short-cut nitrification anaerobic ammonia oxidation coupled denitrification dephosphorization integrated SBBR (2) reactor operates, sludge rich in phosphorus needs to be discharged. The sludge age is controlled to be 10-15 days.
The low-oxygen aeration AOA-SBBR short-range nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated municipal sewage treatment method provided by the invention has the following advantages:
1) in the aeration process, the concentration of dissolved oxygen in the SBBR is extremely low and is only 0.04-0.1mg/L, so that the energy consumption can be greatly saved;
2) by utilizing the characteristic that the denitrifying phosphorus accumulating bacteria and the denitrifying polysaccharide bacteria synthesize PHAs under the anaerobic condition, the organic carbon source in the raw water is utilized to the maximum extent, and the addition of an external carbon source is avoided;
3) the denitrifying phosphorus removal and the short-cut nitrification anaerobic ammonia oxidation are effectively coupled together, nitrogen and phosphorus elements in the sewage are further removed, and the adverse effect of an external carbon source on the anaerobic ammonia oxidation is avoided by utilizing the internal carbon source.
4) By coupling the shortcut nitrification anaerobic ammonia oxidation and the denitrification dephosphorization, the cooperation and the unification of the functions of the shortcut nitrification anaerobic ammonia oxidation and the denitrification dephosphorization are realized, and the COD and the NO are realized2 --N、NO3 --N and NH4 +The efficient removal of-N is a significant research direction for sewage treatment.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the low-oxygen aeration AOA-SBBR short-range nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated municipal sewage treatment method.
In the figure, 1 is a raw water tank; 2, a short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor; 3 is a water outlet tank; 4, an online monitoring and feedback control system; 1.1 is an overflow pipe of a raw water tank; 1.2 is a raw water tank drain pipe; 2.1 is a water inlet pump; 2.2 is a stirrer; 2.3 is a stirring paddle; 2.4 is a sludge discharge port; 2.5 is a water inlet; 2.6 is a drainage electric valve; 2.7 is an aeration pump; 2.8 is an aeration electromagnetic valve; 2.9 is a gas flowmeter; 2.10 is an aeration disc; 2.11 is a pH/DO instrument; 2.12 is a DO sensor; 2.13 is a pH sensor; 3.1 is a water outlet tank drain pipe; 4.1 is a computer; 4.2 is a programmable process controller; 4.3 is the AD conversion interface of the signal converter; 4.4 is a DA conversion interface of the signal converter; 4.5 is a stirring relay; 4.6 is a water inlet pump relay; 4.7 is a drainage electric valve relay; 4.8 is an aeration relay;
the specific implementation mode is as follows:
the following description is further made with reference to the accompanying drawings and examples: as shown in fig. 1, the low-oxygen aeration AOA-SBBR short-distance nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated municipal sewage treatment method is characterized in that the used device comprises a raw water tank (1), a short-distance nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2), an effluent water tank (3) and an online monitoring and feedback control system (4); wherein the raw water tank (1) is connected with a single-stage SBBR short-cut nitrification anaerobic ammonia oxidation coupling endogenous denitrification SBBR reactor (2) through a water inlet pump (2.1); a drainage electric valve (2.6) of the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2) is connected with a water outlet tank (3);
the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2) is provided with a stirring paddle (2.3), a sludge discharge port (2.4), a water inlet (2.5), a water discharge electric valve (2.6), an air pump (2.7), an aeration electromagnetic valve (2.8), a gas flowmeter (2.9), an aeration disc (2.10), a pH/DO instrument (2.11), a DO sensor (2.12) and a pH sensor (2.13);
the on-line monitoring and feedback control system (4) comprises a computer (4.1) and a programmable process controller (4.2), wherein the programmable process controller (4.2) is internally provided with a signal converter AD conversion interface (4.3), a signal converter DA conversion interface (4.4), a stirring relay (4.5), a water inlet pump relay (4.6), a water drainage electric valve relay (4.7) and an aeration relay (4.8); wherein, a signal AD conversion interface (4.3) on the programmable process controller (4.2) is connected with the computer (4.1) through a cable, and converts the analog signal of the sensor into a digital signal and transmits the digital signal to the computer (4.1); a computer (4.1) is connected with a programmable process controller (4.2) through a signal converter DA (4.4) conversion interface, a digital instruction of the computer (4.1) is transmitted to the programmable process controller (4.2), a stirrer relay (4.5) is connected with a stirrer (2.2), a water inlet pump relay (4.6) is connected with a water inlet pump (2.1), a water discharge electric valve relay (4.7) is connected with a water discharge electric valve (2.6), an aeration relay (4.8) is connected with an electromagnetic valve (2.8), and a DO sensor (2.12) and a pH sensor (2.13) are respectively connected with a DO and a pH determinator (2.11).
In the test process, the specific experimental water is taken from domestic sewage diluted in family districts of Beijing university of industry, and the specific water quality is as follows: COD concentration is 79-241mg/L, NH4 +N concentration of 42-54mg/L, NO2 -N concentration < 1mg/L, NO3 --N concentration 0.1-1.4mg/L, PO4 3-The concentration of P is 4.3-7.6mg/L, and the pH value is 7.3-7.6. The test system is shown in figure 1, the reactor is made of organic glass, and the effective volume of the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2) is 10L.
The specific operation is as follows:
1) and (3) starting a system: the polyurethane sponge filler attached with the ammonia oxidizing bacteria and the anaerobic ammonia oxidizing bacteria biomembrane is hung on a filler rack in a short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor, the outer layer of the filler is the ammonia oxidizing bacteria, the inner part of the filler is the anaerobic ammonia oxidizing bacteria, and the sludge concentration of the filler biomembrane is 3000-4000 mg/L. And adding the floccule sludge domesticated and having denitrifying phosphorus removal and endogenous denitrifying property into a short-cut nitrification anaerobic ammonia oxidation coupling denitrifying phosphorus removal integrated SBBR reactor to ensure that the floccule sludge concentration reaches 1500-2000 mg/L. The proportion of the filler to the biomass in the floc sludge is not limited.
2) And (3) adjusting operation during operation:
adding sewage into a raw water tank (1), starting a water inlet pump (2.1) to pump the sewage into a shortcut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2).
When the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR (2) operates, anaerobic stirring is carried out for 120min in each period, then aeration stirring is carried out for 360min, the DO concentration in the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR (2) is controlled to be 0.04-0.1mg/L, then anoxic stirring is carried out for 180min, precipitation drainage is carried out, the drainage ratio is 50%, the effluent is discharged into a water outlet tank (3), and the effluent enters the next period after standing for 30 min;
when the short-cut nitrification anaerobic ammonia oxidation coupled denitrification dephosphorization integrated SBBR reactor (2) operates, sludge needs to be discharged, and the sludge age is controlled to be 10-15 d;
the test result shows that: low-oxygen aeration AOA-SBBR short-distance nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated municipal sewage treatment method for treating COD (chemical oxygen demand) of effluent less than 40mg/L and NH4 +-N＜5mg/L，NO2 --N＜1mg/L，NO3 -N is less than 5mg/L, total N is less than 10mg/L, and P is less than 0.5mg/L, thus meeting the national first-class A discharge standard of urban sewage.
Claims (1)
1. The low-oxygen aeration AOA-SBBR short-distance nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated municipal sewage treatment method is characterized in that the applied device comprises a raw water tank (1), a short-distance nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2), an effluent water tank (3) and an online monitoring and feedback control system (4); wherein the raw water tank (1) is connected with a single-stage SBBR short-cut nitrification anaerobic ammonia oxidation coupling endogenous denitrification SBBR reactor (2) through a water inlet pump (2.1); a drainage electric valve (2.6) of the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2) is connected with a water outlet tank (3);
the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2) comprises a stirring paddle (2.3), a sludge discharge port (2.4), a water inlet (2.5), a water discharge electric valve (2.6), an air pump (2.7), an aeration electromagnetic valve (2.8), a gas flowmeter (2.9), an aeration disc (2.10), a pH/DO instrument (2.11), a DO sensor (2.12) and a pH sensor (2.13);
the on-line monitoring and feedback control system (4) comprises a computer (4.1) and a programmable process controller (4.2), wherein the programmable process controller (4.2) is internally provided with a signal converter AD conversion interface (4.3), a signal converter DA conversion interface (4.4), a stirring relay (4.5), a water inlet pump relay (4.6), a water drainage electric valve relay (4.7) and an aeration relay (4.8); wherein, a signal AD conversion interface (4.3) on the programmable process controller (4.2) is connected with the computer (4.1) through a cable, and converts the analog signal of the sensor into a digital signal and transmits the digital signal to the computer (4.1); a computer (4.1) is connected with a programmable process controller (4.2) through a conversion interface of a signal converter DA (4.4), a digital instruction of the computer (4.1) is transmitted to the programmable process controller (4.2), a stirrer relay (4.5) is connected with a stirrer (2.2), a water inlet pump relay (4.6) is connected with a water inlet pump (2.1), a water discharge electric valve relay (4.7) is connected with a water discharge electric valve (2.6), an aeration relay (4.8) is connected with an electromagnetic valve (2.8), a DO sensor (2.12) and a pH sensor (2.13) are respectively connected with a DO and a pH determinator (2.11);
the operation comprises the following steps:
1) and (3) starting a system:
hanging a polyurethane sponge filler attached with ammonia oxidizing bacteria and an anaerobic ammonia oxidizing bacteria biomembrane on a filler rack in a short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor, wherein the outer layer of the filler is ammonia oxidizing bacteria, the inner part of the filler is anaerobic ammonia oxidizing bacteria, and the sludge concentration of the filler biomembrane is 3000-4000 mg/L; adding the domesticated floc sludge with denitrifying phosphorus removal and endogenous denitrifying property into a short-cut nitrification anaerobic ammonia oxidation coupling denitrifying phosphorus removal integrated SBBR reactor to ensure that the floc sludge concentration reaches 1500-2000 mg/L;
2) and (3) adjusting operation during operation:
adding sewage into a raw water tank (1), starting a water inlet pump (2.1) to pump the sewage into a shortcut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2);
when the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR (2) operates, anaerobic stirring is carried out for 120min in each period, then aeration stirring is carried out for 360min, the DO concentration in the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR (2) is controlled to be 0.04-0.1mg/L, then anoxic stirring is carried out for 180min, precipitation drainage is carried out, the drainage ratio is 50%, the effluent is discharged into a water outlet tank (3), and the effluent enters the next period after standing for 30 min;
when the short-cut nitrification anaerobic ammonia oxidation coupling denitrification dephosphorization integrated SBBR reactor (2) operates, sludge needs to be discharged, and the sludge age is controlled to be 10-15 d.
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