CN110950435A - Wastewater treatment system and method - Google Patents
Wastewater treatment system and method Download PDFInfo
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims description 37
- 239000002351 wastewater Substances 0.000 claims abstract description 114
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 101
- 238000011282 treatment Methods 0.000 claims abstract description 52
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 49
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 48
- 230000003647 oxidation Effects 0.000 claims abstract description 46
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000011221 initial treatment Methods 0.000 claims abstract description 25
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 239000010802 sludge Substances 0.000 claims description 50
- 230000008569 process Effects 0.000 claims description 25
- 230000001105 regulatory effect Effects 0.000 claims description 23
- 238000004062 sedimentation Methods 0.000 claims description 19
- 239000010865 sewage Substances 0.000 claims description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- 241000894006 Bacteria Species 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 238000012163 sequencing technique Methods 0.000 claims description 6
- 230000001546 nitrifying effect Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 241001148471 unidentified anaerobic bacterium Species 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 2
- 230000033116 oxidation-reduction process Effects 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 47
- 229910052757 nitrogen Inorganic materials 0.000 description 22
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 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 4
- 238000005273 aeration Methods 0.000 description 4
- 238000006396 nitration reaction Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 241001453382 Nitrosomonadales Species 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000001651 autotrophic effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
-
- 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
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- Biodiversity & Conservation Biology (AREA)
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a wastewater treatment system and a wastewater treatment method, wherein the system comprises: the short-cut nitrification device is used for carrying out short-cut nitrification treatment on the wastewater to be treated under aerobic condition to obtain primary treated wastewater, and the primary treated wastewater comprises ammonia nitrogen and nitrite nitrogen; the anaerobic ammonia oxidation device is connected with the partial nitrification device to receive the primary treatment wastewater, and the anaerobic ammonia oxidation treatment is carried out on the primary treatment wastewater to obtain the dischargeable liquid reaching the standard. The wastewater treatment system and the wastewater treatment method provided by the invention realize low-cost treatment of high ammonia nitrogen wastewater.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment system and a wastewater treatment method.
Background
With the accelerated development of industrial process in China, the water quality pollution caused by the discharge of waste water is becoming more and more serious, and the living environment on which human beings live is damaged. High ammonia nitrogen wastewater, a common wastewater in industrial processes, is mainly caused by the presence of ammonia nitrogen, such as ammonia water and inorganic ammonia. The direct discharge of the high ammonia nitrogen wastewater into the water body can not only cause eutrophication of the water body, but also cause black and odorous water body and even poison people and organisms, so that the high ammonia nitrogen wastewater can be discharged after reaching the standard.
The prior advanced treatment method of high ammonia nitrogen wastewater is a biological denitrification process (anaerobic/Oxic, A/O for short). The basic principle of the biological denitrification process is as follows: on the basis of converting organic nitrogen into ammonia nitrogen, converting the ammonia nitrogen into nitrite nitrogen and nitrate nitrogen through the nitrification of autotrophic bacteria under aerobic conditions; then, an external carbon source provides energy, nitrite nitrogen and nitrate nitrogen are converted into nitrogen through the denitrification of the heterotrophic bacteria under the anaerobic condition, and the nitrogen overflows the water surface and is released to the atmosphere to complete the denitrification process.
However, the biological denitrification process has a technical problem of high running cost due to large aerobic aeration amount and large carbon source requirement.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a wastewater treatment system and a treatment method, so as to realize low-cost treatment of high ammonia nitrogen wastewater.
According to a first aspect of the present invention, there is provided a wastewater treatment system comprising:
the short-cut nitrification device is used for carrying out short-cut nitrification treatment on the wastewater to be treated under an aerobic condition to obtain primary treated wastewater, wherein the primary treated wastewater comprises ammonia nitrogen and nitrite nitrogen;
and the anaerobic ammonia oxidation device is connected with the partial nitrification device to receive the primary treatment wastewater and carry out anaerobic ammonia oxidation treatment on the primary treatment wastewater to obtain dischargeable standard-reaching liquid.
Optionally, the short-cut nitrification apparatus comprises: a short-cut nitrification tower, wherein,
the water inlet of the short-cut nitrification tower is connected with the collecting pipeline of the wastewater to be treated so as to receive the wastewater to be treated flowing in from the collecting pipeline;
and aerobic activated sludge is inoculated in the short-cut nitrification tower, and nitrifying bacteria in the aerobic activated sludge carry out short-cut nitrification treatment on the wastewater to be treated flowing through the aerobic activated sludge, so that part of ammonia nitrogen in the wastewater to be treated is converted into nitrite nitrogen.
Optionally, the anammox device comprises: an anaerobic ammonia oxidation tower, wherein,
the water inlet of the anaerobic ammonia oxidation tower is connected with the water outlet of the short-cut nitrification tower so as to receive the primary treatment wastewater flowing from the water outlet of the short-cut nitrification tower;
and anaerobic digested sludge and denitrifying sludge are inoculated in the anaerobic ammonia oxidation tower, anaerobic bacteria in the anaerobic digested sludge decompose residual organic matters of the primary treated wastewater to generate primary treated wastewater containing carbon dioxide, and anaerobic ammonia oxidation bacteria in the denitrifying sludge utilize the carbon dioxide in the primary treated wastewater to carry out anaerobic ammonia oxidation treatment on the primary treated wastewater so as to obtain dischargeable standard-reaching liquid.
Optionally, the anammox tower comprises a reactor in any of the following ways: an up-flow anaerobic sludge bed, an expanded granular sludge bed, a fluidized bed, a sequencing batch activated sludge process and an anaerobic sequencing batch activated sludge process.
Optionally, the wastewater treatment system further comprises: an ammoniation device, wherein,
the ammoniation device is arranged on an upstream pipeline of the short-cut nitrification device so as to firstly carry out ammoniation treatment on organic matters in the wastewater to be treated entering the short-cut nitrification device;
and anaerobic granular sludge is inoculated in the ammoniation device, and ammoniation bacteria of the anaerobic granular sludge carry out ammoniation treatment on the wastewater to be treated flowing through the anaerobic granular sludge.
Optionally, the wastewater treatment system further comprises:
the device comprises a regulating tank, wherein a stirrer is arranged in the regulating tank, so that wastewater to be treated flowing into the regulating tank at different time intervals is mixed by the stirrer;
and the water inlet of the sewage pump is connected with the regulating reservoir, and the water outlet of the sewage pump is connected with the water inlet of the short-distance nitrification device, so that the wastewater to be treated which is uniformly stirred in the regulating reservoir is pumped into the short-distance nitrification device.
Optionally, the wastewater treatment system further comprises:
and the water outlet of the sedimentation tank is connected with the water inlet of the regulating tank, so that the wastewater to be treated entering the regulating tank is subjected to sedimentation pretreatment in the sedimentation tank.
Optionally, the wastewater treatment system further comprises:
and the mechanical grating is arranged on an upstream pipeline of the sedimentation tank so that the wastewater to be treated entering the sedimentation tank is filtered and pretreated through the mechanical grating.
According to a second aspect of the present invention, there is provided a wastewater treatment method comprising:
carrying out short-cut nitrification treatment on the wastewater to be treated under an aerobic condition to obtain primary treatment wastewater, wherein the primary treatment wastewater comprises ammonia nitrogen and nitrite nitrogen;
and carrying out anaerobic ammonia oxidation treatment on the primary treatment wastewater to obtain a dischargeable standard liquid.
Optionally, the nitration reaction conditions in the short-cut nitration treatment are as follows:
the range of oxygen dissolution concentration is maintained between 1.0 and 2.0mg/L, and the range of ammonia nitrogen load is maintained between 0.015 and 0.035NH4 +-N/kgVSS d, and the pH is maintained in the range of 6 to 8.
Optionally, in the anammox treatment, the anammox reaction conditions are as follows:
under the anaerobic condition, the range of oxidation-reduction potential is maintained between-0.3V and-0.5V, the temperature is maintained between 25 ℃ and 40 ℃, the range of PH value is maintained between 6 and 8, and the range of design load is maintained between 700 and 900 kgN/d.
The invention has the beneficial effects that:
the ammonia nitrogen is removed by combining a shortcut nitrification device and an anaerobic ammonia oxidation device, wherein the shortcut nitrification device implements shortcut nitrification treatment, and part of ammonia nitrogen in the wastewater to be treated is converted into nitrite nitrogen to obtain primary treatment wastewater containing the ammonia nitrogen and the nitrite nitrogen; the anaerobic ammonia oxidation device performs anaerobic ammonia oxidation treatment, ammonia nitrogen and nitrite nitrogen in primary treatment wastewater are reacted to generate nitrogen and water, and external carbon source supply is not needed, so that compared with the traditional A/O process, the anaerobic ammonia oxidation device reduces the aeration amount of oxygen and saves energy in the wastewater treatment process, and effectively reduces the operation cost, thereby solving the technical problem of higher operation cost of the existing high ammonia nitrogen wastewater treatment method and realizing low-cost treatment of high ammonia nitrogen wastewater.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
FIG. 1 is a block diagram showing a configuration of a wastewater treatment system according to a first embodiment of the present invention;
FIG. 2 is a block diagram showing another configuration of a wastewater treatment system according to the first embodiment of the present invention;
FIG. 3 is a flow chart showing a wastewater treatment method according to a second embodiment of the present invention.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
In the following description, numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of the devices are described in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
Embodiments of the present invention are specifically described below with reference to the accompanying drawings.
FIG. 1 shows a wastewater treatment system according to a first embodiment of the present invention. Referring to fig. 1, the wastewater treatment system includes:
a short-cut nitrification device 100 for nitrifying the waste waterCarrying out short-cut nitrification treatment on the wastewater to be treated to obtain primary treatment wastewater, wherein the primary treatment wastewater comprises ammonia nitrogen NH4 +-N and nitrous nitrogen NO2 --N；
The anaerobic ammonia oxidation device 200 is connected with the partial nitrification device 100 to receive the primary treatment wastewater and carry out anaerobic ammonia oxidation treatment on the primary treatment wastewater to obtain dischargeable qualified liquid.
It is to be noted that the short-cut nitrification treatment is to add ammonia nitrogen NH in an aerobic state4 +Oxidation of-N to nitrite Nitrogen NO2 --N; anaerobic ammonia oxidation treatment, i.e. the treatment of ammonia nitrogen NH by anaerobic ammonia oxidizing bacteria in anaerobic state4 +-N and nitrous nitrogen NO2 -Conversion of N into N2。
The wastewater treatment system provided by the embodiment of the invention realizes the removal of ammonia nitrogen through the shortcut nitrification device 100 and the anaerobic ammonia oxidation device 200, namely, the ammonia nitrogen is removed by adopting a process combining shortcut nitrification and anaerobic ammonia oxidation, wherein the shortcut nitrification is to remove part of ammonia nitrogen NH in wastewater to be treated4 +Conversion of-N to nitrous nitrogen NO2 --N, to obtain NH comprising ammoniacal nitrogen4 +-N and nitrous nitrogen NO2 -Primary treatment of wastewater with-N, without too much oxygen to oxidize all the ammoniacal nitrogen NH4 +-N and does not require too much oxygen to oxidize ammoniacal nitrogen NO2 --N to obtain nitrate nitrogen NO3 --N; the anaerobic ammonia oxidation is to oxidize ammonia nitrogen NH in the primary treatment wastewater4 +-N and nitrous nitrogen NO2 -The N reacts to generate nitrogen and water, and the anaerobic ammoxidation reaction does not need external carbon source supply, so compared with the traditional A/O process, the wastewater treatment process reduces the aeration quantity of oxygen, saves energy, effectively reduces the operation cost, solves the technical problem of higher operation cost of the existing high ammonia nitrogen wastewater treatment method, and realizes the low-cost treatment of the high ammonia nitrogen wastewater.
In an alternative embodiment, the wastewater treatment system further comprises: an ammoniation device, wherein the ammoniation device is arranged on an upstream pipeline of the short-cut nitrification device 100 so as to firstly ammoniate organic matters in the wastewater to be treated entering the short-cut nitrification device 100; and anaerobic granular sludge is inoculated in the ammoniation device, and ammoniation bacteria of the anaerobic granular sludge carry out ammoniation treatment on the wastewater to be treated flowing through the anaerobic granular sludge.
It should be noted that the ammoniation device firstly ammoniates the organic matter in the wastewater to be treated entering the short-cut nitrification device 100, so that the nitrogen in the organic matter is converted into ammonia nitrogen, and the ammonia nitrogen converted from the organic matter is converted into nitrogen gas through the downstream short-cut nitrification device 100 and the anaerobic ammonia oxidation device 200 and is released.
The wastewater treatment system provided by the embodiment of the invention is additionally provided with the ammoniation device, so that the treatment depth of wastewater is increased; and the ammoniation device is arranged at the upstream of the shortcut nitrification device 100 and the anaerobic ammonia oxidation device 200, so that the reasonable utilization of the wastewater treatment system and the efficient removal of the organic matters in the wastewater to be treated are realized.
Referring to fig. 2, the shortcut nitrification apparatus 100 includes: a short-cut nitrification tower 101, wherein a water inlet A of the short-cut nitrification tower 101 is connected with a collection pipeline 102 of the wastewater to be treated so as to receive the wastewater to be treated flowing in from the collection pipeline 102; and aerobic activated sludge is inoculated in the shortcut nitrification tower 101, wherein nitrifying bacteria in the aerobic activated sludge carry out shortcut nitrification treatment on the wastewater to be treated flowing through the aerobic activated sludge, so that part of ammonia nitrogen NH in the wastewater to be treated4 +Conversion of-N to nitrous nitrogen NO2 --N。
The anammox apparatus 200 includes: the anaerobic ammonia oxidation tower 201, wherein a water inlet C of the anaerobic ammonia oxidation tower 201 is connected with a water outlet B of the shortcut nitrification tower 101 so as to receive primary treatment wastewater flowing in from the water outlet B of the shortcut nitrification tower 101; a water outlet D of the anaerobic ammonia oxidation tower 201 discharges a liquid reaching the standard; anaerobic digested sludge and denitrifying sludge are inoculated in the anaerobic ammonia oxidation tower 201, anaerobic bacteria in the anaerobic digested sludge decompose residual organic matters in the primary treated wastewater to generate primary treated wastewater containing carbon dioxide, and anaerobic ammonia oxidation bacteria in the denitrifying sludge utilize the carbon dioxide in the primary treated wastewater to carry out anaerobic ammonia oxidation treatment on the primary treated wastewater to obtain a dischargeable standard-reaching liquid, so that the decomposition of the organic matters in the wastewater to be treated is further deepened in the anaerobic ammonia oxidation treatment process, and carbon sources decomposable in the organic matters are fully utilized to reduce the treatment cost of the wastewater.
Specifically, the anammox column 201 may include a reactor that employs either: an upflow Anaerobic Sludge Blanket (Up-flow Anaerobic Sludge Bed/Blanket, UASB for short), an expanded granular Sludge Blanket (EGSB for short), a fluidized Bed, a sequencing batch activated Sludge process (SBR for short), and an Anaerobic sequencing batch activated Sludge process (ASBR for short).
Referring to FIG. 2, in an alternative embodiment, the wastewater treatment system further comprises:
the adjusting tank 300 is internally provided with a stirrer, so that wastewater to be treated flowing into the adjusting tank 300 at different time intervals is mixed by the stirrer;
the sewage pump 400, the water inlet of the sewage pump 400 is connected with the regulating reservoir 300 and the water outlet is connected with the water inlet of the short-distance nitrification device 100, so as to pump the wastewater to be treated which is uniformly stirred in the regulating reservoir 300 into the short-distance nitrification device 100.
Specifically, the sewage pump 400 may be placed in the equalizing tank 300 to realize connection between the water inlet of the sewage pump 400 and the equalizing tank 300, and the water outlet of the sewage pump 400 may be connected to the water inlet a of the short-cut nitrification tower 101 in the short-cut nitrification apparatus 100 through the above-mentioned collection pipe 102. Further, a plurality of sewage pumps 400 can be arranged, a plurality of sewage pumps 400 are all arranged in the adjusting tank 300, and the water outlets of the plurality of sewage pumps 400 are all connected with the water inlet A of the shortcut nitrification tower 101 through the collecting pipe 102. A valve may be further disposed in the communication pipe between the water outlet of the sewage pump 400 and the water inlet of the collecting pipe 102, so as to adjust the flow of sewage flowing through the communication pipe via the valve, thereby adapting to different waste water treatment conditions.
It should be noted that the regulating reservoir 300 is a reservoir having a large inner volume, and wastewater to be treated flowing into the regulating reservoir 300 from the water inlet E of the regulating reservoir 300 for a long period of time is stored in the regulating reservoir 300, and the wastewater is mixed together after being stirred by the stirrer.
In the embodiment of the invention, the wastewater to be treated in the regulating tank 300 is mixed, i.e. the wastewater to be treated discharged from a wastewater source at different moments is subjected to water quality homogenization treatment in the regulating tank 300; and the wastewater to be treated in the regulating reservoir 300 is pumped into the shortcut nitrification device 100 by the sewage pump 400, so that the water quantity entering the nitrification device 100 is uniform. Therefore, the embodiment of the invention realizes the homogenization adjustment of the water quantity and the water quality of the wastewater to be treated by arranging the adjusting tank 300 and the sewage pump 400, which not only reduces the requirements on the water quality and the water quantity constancy of the wastewater to be treated, but also ensures the continuity of the subsequent shortcut nitrification process and the anaerobic ammonia oxidation process.
Referring to FIG. 2, in another alternative embodiment, the wastewater treatment system further comprises: the sedimentation tank 500, the water outlet F of the sedimentation tank 500 and the water inlet E of the adjusting tank 300 are connected, so that the wastewater to be treated entering the adjusting tank 300 is firstly subjected to sedimentation pretreatment in the sedimentation tank 500. Most of solid suspended matters and solid particles such as quartz sand with high density are removed from the wastewater to be treated through precipitation pretreatment, so that the wastewater treatment equipment at the downstream of the sedimentation tank 500 is not damaged by the solid particles, the service life of a wastewater treatment system is prolonged, and the operation cost of the wastewater treatment system is reduced.
Referring to FIG. 2, in another alternative embodiment, the wastewater treatment system further comprises: the mechanical grating 600, the mechanical grating 600 is arranged on the upstream pipeline of the sedimentation tank 500 (the upstream pipeline of the sedimentation tank 500 is connected with the water inlet G of the sedimentation tank 500), so that the wastewater to be treated entering the sedimentation tank 500 is filtered and pretreated through the mechanical grating 600. The wastewater to be treated is pretreated by filtration to remove suspended solids with larger volume, so that wastewater treatment equipment downstream of the mechanical grating 600 is not damaged by the suspended solids, and the problem of sludge yield surge caused by the suspended solids is avoided.
FIG. 3 is a flow chart of a wastewater treatment method according to a second embodiment of the present invention. Referring to fig. 3, the wastewater treatment method includes:
step S101, carrying out short-cut nitrification treatment on the wastewater to be treated under an aerobic condition to obtain primary treated wastewater, wherein the primary treated wastewater comprises ammonia nitrogen and nitrite nitrogen;
and S102, carrying out anaerobic ammonia oxidation treatment on the primary treatment wastewater to obtain dischargeable standard-reaching liquid.
The wastewater treatment method provided by the embodiment of the invention adopts a process combining shortcut nitrification and anaerobic ammonia oxidation to remove ammonia nitrogen, wherein the shortcut nitrification is to remove part of ammonia nitrogen NH in the wastewater to be treated4 +Conversion of-N to nitrous nitrogen NO2 --N, to obtain NH comprising ammoniacal nitrogen4 +-N and nitrous nitrogen NO2 --N of primary treatment wastewater; the anaerobic ammonia oxidation without external carbon source is to treat ammonia nitrogen NH in the primary treated wastewater4 +-N and nitrous nitrogen NO2 -the-N reacts to generate nitrogen and water, so that the aeration quantity of oxygen is reduced and energy is saved in the wastewater treatment process, and compared with the traditional A/O process, the operation cost can be effectively reduced, thereby solving the technical problem of higher operation cost of the existing high ammonia nitrogen wastewater treatment method and realizing the low-cost treatment of the high ammonia nitrogen wastewater.
In an alternative embodiment, the nitration conditions in the short-cut nitration are:
the range of dissolved oxygen concentration is maintained to be 1.0-2.0 mg/L, namely, 1.0-2.0 mg of oxygen is dissolved in each liter of sludge used in the short-cut nitrification treatment;
the range of ammonia nitrogen load is maintained between 0.015 and 0.035NH4 +N/kgVSS.d, namely, the sludge used in the short-cut nitrification treatment can convert 0.015 to 0.035 kg of ammonia nitrogen into nitrite nitrogen per kg of sludge per day;
and the pH value is maintained in the range of 6-8, namely the sludge used in the short-cut nitrification treatment is neutral, weak acid or weak base.
The wastewater treatment provided by the embodiment of the inventionThe method comprises the steps of carrying out short-range nitrification treatment on the wastewater to be treated to obtain nitrite nitrogen NO2 -The N is stably accumulated, so that nitrite nitrogen NO is generated2 -The ratio of-N to total nitrate nitrogen is greater than 90%, and nitrite nitrogen NO2 --N and ammoniacal nitrogen NH4 +The ratio of-N is close to 1.0, which is beneficial to the subsequent anaerobic ammonia oxidation reaction to convert nitrite nitrogen NO2 --N and ammoniacal nitrogen NH4 +N is converted to nitrogen N2。
In another alternative embodiment, the anaerobic ammonia oxidation reaction conditions in the anaerobic ammonia oxidation treatment are set as follows to achieve an efficient denitrification process:
anaerobic conditions;
ammoniacal nitrogen NH4 +Oxidation of N and nitrous Nitrogen NO2 -The potential range of-N reduction is maintained between-0.3V and-0.5V;
the anaerobic ammoxidation reaction temperature is maintained at 25-40 ℃;
the design load range is maintained at 700-900 kgN/d, namely, 700-900 kg of sludge can be used for anaerobic ammonia oxidation reaction every day in the anaerobic ammonia oxidation treatment;
and the pH value is maintained in the range of 6-8, namely the sludge used in the anaerobic ammonia oxidation treatment is neutral, weak acid or weak base.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (11)
1. A wastewater treatment system, comprising:
the short-cut nitrification device is used for carrying out short-cut nitrification treatment on the wastewater to be treated under an aerobic condition to obtain primary treated wastewater, wherein the primary treated wastewater comprises ammonia nitrogen and nitrite nitrogen;
and the anaerobic ammonia oxidation device is connected with the partial nitrification device to receive the primary treatment wastewater and carry out anaerobic ammonia oxidation treatment on the primary treatment wastewater to obtain dischargeable standard-reaching liquid.
2. The wastewater treatment system of claim 1, wherein the short-cut nitrification apparatus comprises: a short-cut nitrification tower, wherein,
the water inlet of the short-cut nitrification tower is connected with the collecting pipeline of the wastewater to be treated so as to receive the wastewater to be treated flowing in from the collecting pipeline;
and aerobic activated sludge is inoculated in the short-cut nitrification tower, and nitrifying bacteria in the aerobic activated sludge carry out short-cut nitrification treatment on the wastewater to be treated flowing through the aerobic activated sludge, so that part of ammonia nitrogen in the wastewater to be treated is converted into nitrite nitrogen.
3. The wastewater treatment system of claim 2, wherein the anammox device comprises: an anaerobic ammonia oxidation tower, wherein,
the water inlet of the anaerobic ammonia oxidation tower is connected with the water outlet of the short-cut nitrification tower so as to receive the primary treatment wastewater flowing from the water outlet of the short-cut nitrification tower;
and anaerobic digested sludge and denitrifying sludge are inoculated in the anaerobic ammonia oxidation tower, anaerobic bacteria in the anaerobic digested sludge decompose residual organic matters of the primary treated wastewater to generate primary treated wastewater containing carbon dioxide, and anaerobic ammonia oxidation bacteria in the denitrifying sludge utilize the carbon dioxide in the primary treated wastewater to carry out anaerobic ammonia oxidation treatment on the primary treated wastewater so as to obtain dischargeable standard-reaching liquid.
4. The wastewater treatment system of claim 3, wherein the anammox tower comprises a reactor that employs any of the following: an up-flow anaerobic sludge bed, an expanded granular sludge bed, a fluidized bed, a sequencing batch activated sludge process and an anaerobic sequencing batch activated sludge process.
5. The wastewater treatment system of claim 1, further comprising: an ammoniation device, wherein,
the ammoniation device is arranged on an upstream pipeline of the short-cut nitrification device so as to firstly carry out ammoniation treatment on organic matters in the wastewater to be treated entering the short-cut nitrification device;
and anaerobic granular sludge is inoculated in the ammoniation device, and ammoniation bacteria of the anaerobic granular sludge carry out ammoniation treatment on the wastewater to be treated flowing through the anaerobic granular sludge.
6. The wastewater treatment system of claim 1, further comprising:
the device comprises a regulating tank, wherein a stirrer is arranged in the regulating tank, so that wastewater to be treated flowing into the regulating tank at different time intervals is mixed by the stirrer;
and the water inlet of the sewage pump is connected with the regulating reservoir, and the water outlet of the sewage pump is connected with the water inlet of the short-distance nitrification device, so that the wastewater to be treated which is uniformly stirred in the regulating reservoir is pumped into the short-distance nitrification device.
7. The wastewater treatment system of claim 6, further comprising:
and the water outlet of the sedimentation tank is connected with the water inlet of the regulating tank, so that the wastewater to be treated entering the regulating tank is subjected to sedimentation pretreatment in the sedimentation tank.
8. The wastewater treatment system of claim 7, further comprising:
and the mechanical grating is arranged on an upstream pipeline of the sedimentation tank so that the wastewater to be treated entering the sedimentation tank is filtered and pretreated through the mechanical grating.
9. A method of wastewater treatment, comprising:
carrying out short-cut nitrification treatment on the wastewater to be treated under an aerobic condition to obtain primary treatment wastewater, wherein the primary treatment wastewater comprises ammonia nitrogen and nitrite nitrogen;
and carrying out anaerobic ammonia oxidation treatment on the primary treatment wastewater to obtain a dischargeable standard liquid.
10. The wastewater treatment method according to claim 9, wherein the nitrification reaction conditions in the short-cut nitrification treatment are:
the range of oxygen dissolution concentration is maintained between 1.0 and 2.0mg/L, and the range of ammonia nitrogen load is maintained between 0.015 and 0.035NH4 +-N/kgVSS d, and the pH is maintained in the range of 6 to 8.
11. The method for treating wastewater according to claim 10, wherein the anammox reaction conditions in the anammox treatment are:
under the anaerobic condition, the range of oxidation-reduction potential is maintained between-0.3V and-0.5V, the temperature is maintained between 25 ℃ and 40 ℃, the range of PH value is maintained between 6 and 8, and the range of design load is maintained between 700 and 900 kgN/d.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007684A (en) * | 2007-01-19 | 2007-08-01 | 华南理工大学 | Anerobic ammoxidation and denitrification synergistic denitrification method for garbage leachate |
| CN101746925A (en) * | 2009-12-14 | 2010-06-23 | 朱杰 | New combined process for treating and standardizing high-concentration culture waste water |
| CN101767872A (en) * | 2010-01-08 | 2010-07-07 | 河海大学 | Methanation, denitrification and anammox coupling process based sewage treatment process |
| CN102515350A (en) * | 2011-12-09 | 2012-06-27 | 北京工业大学 | Apparatus and method for nitrogen removal by combining garbage leachate SBR and anaerobic ammoxidation |
| CN102557344A (en) * | 2011-12-29 | 2012-07-11 | 广州市市政工程设计研究院 | Energy recycling sewage treatment method coupling nitrogen and carbon removal and device for the same |
| CN204151139U (en) * | 2014-08-11 | 2015-02-11 | 吕慧 | A kind of sequence batch (A/O linked system wastewater treatment equipment realizing waste water short distance nitration |
| CN105461169A (en) * | 2015-12-11 | 2016-04-06 | 中国科学院微生物研究所 | Wastewater treatment process for pig farm |
| CN106966500A (en) * | 2017-04-18 | 2017-07-21 | 华南理工大学 | Ammonia nitrogen waste water biochemical denitrification processing unit and technique that short distance nitration is combined with Anammox |
| CN107089726A (en) * | 2017-06-15 | 2017-08-25 | 盐城工学院 | A kind of waste water treatment reactor and the process for handling waste water |
| CN206467036U (en) * | 2016-12-17 | 2017-09-05 | 杭州师范大学 | Short distance nitration Anammox manifold type denitrification reactor |
| CN211595185U (en) * | 2019-12-12 | 2020-09-29 | 海湾环境科技（北京）股份有限公司 | Wastewater treatment system |
-
2019
- 2019-12-12 CN CN201911276767.6A patent/CN110950435A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007684A (en) * | 2007-01-19 | 2007-08-01 | 华南理工大学 | Anerobic ammoxidation and denitrification synergistic denitrification method for garbage leachate |
| CN101746925A (en) * | 2009-12-14 | 2010-06-23 | 朱杰 | New combined process for treating and standardizing high-concentration culture waste water |
| CN101767872A (en) * | 2010-01-08 | 2010-07-07 | 河海大学 | Methanation, denitrification and anammox coupling process based sewage treatment process |
| CN102515350A (en) * | 2011-12-09 | 2012-06-27 | 北京工业大学 | Apparatus and method for nitrogen removal by combining garbage leachate SBR and anaerobic ammoxidation |
| CN102557344A (en) * | 2011-12-29 | 2012-07-11 | 广州市市政工程设计研究院 | Energy recycling sewage treatment method coupling nitrogen and carbon removal and device for the same |
| CN204151139U (en) * | 2014-08-11 | 2015-02-11 | 吕慧 | A kind of sequence batch (A/O linked system wastewater treatment equipment realizing waste water short distance nitration |
| CN105461169A (en) * | 2015-12-11 | 2016-04-06 | 中国科学院微生物研究所 | Wastewater treatment process for pig farm |
| CN206467036U (en) * | 2016-12-17 | 2017-09-05 | 杭州师范大学 | Short distance nitration Anammox manifold type denitrification reactor |
| CN106966500A (en) * | 2017-04-18 | 2017-07-21 | 华南理工大学 | Ammonia nitrogen waste water biochemical denitrification processing unit and technique that short distance nitration is combined with Anammox |
| CN107089726A (en) * | 2017-06-15 | 2017-08-25 | 盐城工学院 | A kind of waste water treatment reactor and the process for handling waste water |
| CN211595185U (en) * | 2019-12-12 | 2020-09-29 | 海湾环境科技（北京）股份有限公司 | Wastewater treatment system |
Non-Patent Citations (2)
| Title |
|---|
| 周少奇;: "厌氧氨氧化与反硝化协同作用化学计量学分析", 华南理工大学学报(自然科学版), no. 05 * |
| 李军媛: "短程硝化-厌氧氨氧化耦合工艺处理低C/N废水试验研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》, pages 4 - 1 * |
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