CN117228835A - High-efficient biological denitrification device - Google Patents
High-efficient biological denitrification device Download PDFInfo
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- CN117228835A CN117228835A CN202211676643.9A CN202211676643A CN117228835A CN 117228835 A CN117228835 A CN 117228835A CN 202211676643 A CN202211676643 A CN 202211676643A CN 117228835 A CN117228835 A CN 117228835A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 239000010802 sludge Substances 0.000 claims abstract description 38
- 238000007034 nitrosation reaction Methods 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 230000009935 nitrosation Effects 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 23
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 23
- 230000003647 oxidation Effects 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 239000006228 supernatant Substances 0.000 claims abstract description 21
- 239000002351 wastewater Substances 0.000 claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003814 drug Substances 0.000 claims abstract description 10
- 238000004062 sedimentation Methods 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 3
- 238000002347 injection Methods 0.000 claims abstract description 3
- 239000007924 injection Substances 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- 241000894006 Bacteria Species 0.000 claims description 16
- 238000010992 reflux Methods 0.000 claims description 16
- 238000005273 aeration Methods 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 239000000945 filler Substances 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 8
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000001546 nitrifying effect Effects 0.000 claims description 2
- 239000012763 reinforcing filler Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 24
- 230000008569 process Effects 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 229940079593 drug Drugs 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 4
- 241001453382 Nitrosomonadales Species 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000006396 nitration reaction Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Abstract
The invention provides a high-efficiency biological denitrification device, which comprises an anaerobic zone, a biological denitrification device and a biological denitrification device, wherein the anaerobic zone receives high ammonia nitrogen wastewater from the regulated high ammonia nitrogen wastewater to carry out flora growth and reproduction; the mud-water separation regulating device receives mud-water mixed liquor from the anaerobic zone and divides the mud-water mixed liquor into supernatant fluid and lower sludge; the contact mixing area receives supernatant and lower sludge from the mud-water separation adjusting device, and mixes the supernatant and the lower sludge after adding medicines through the installed medicine injection device; a high-efficiency denitrification region; a carbon oxidation zone; a strong nitrosation zone; and in the sedimentation zone, the supernatant reaching the standard is ejected out of the top water outlet overflow device. The invention adopts the structure of the process combination bag to realize the efficient removal of the wastewater with high ammonia nitrogen, the occupied area of equipment used by the whole set of treatment process is greatly reduced, the required additional carbon source and oxygen for operation are greatly reduced compared with the traditional process, a great amount of energy consumption is saved, and the operation load impact resistance of the system greatly enhances the more stable and reliable operation effect.
Description
Technical Field
The invention relates to the field of biological denitrification treatment processes, in particular to the technical field of short-cut nitrification and denitrification, and specifically relates to a high-efficiency biological denitrification device.
Background
Electrobiological denitrification comprises two reaction processes of nitrification and denitrification. The first step is NH extraction by Ammonia oxidizing bacteria ammonium oxidition bacteria AOB) 4 + -N oxidation of NO 2 - Nitrosation process of N.the second step is NO by nitrous acid oxidising bacteria nitrite oxiditionbacteriaNOB 2 - Oxidation of N to NO 3 - -a process of N. The NO produced is then purified by denitrification 3 - -N via NO 2 - N, NO or N 2 Conversion of O to N 2 ，NO 2 - N is an intermediate product of both the nitration and the denitrification processes.
Voets et al 1975 found NO in the end of the nitration process in the study of treating high concentration ammonia nitrogen wastewater 2 - -N accumulated observations. The concept of short-cut nitrification and denitrification biological denitrification is put forward for the first time. The basic principle is that ammonia oxidation is controlled in a nitrosation stage, then nitrogen nitrite is reduced into nitrogen gas by denitrification, and the nitrogen gas is treated by NH 4 + -N-NO-N-N 2 Such an approach is completed.
The technology of denitrification by the method is defined as a short-cut nitrification and denitrification biological denitrification technology, and the short-cut nitrification and denitrification technology can be seen that the reaction time is greatly shortened.
Compared with the traditional denitrification process, the short-cut nitrification-denitrification process has the following advantages:
(1) Energy saving: in the nitration stage, the oxygen supply is saved by about 25%, and the energy consumption is reduced;
(2) The input amount of the additional carbon source is reduced: from NO 2 - To N 2 Compared with NO 3 - To N 2 In the denitrification process of (2), the organic carbon source is reduced by 40 percent;
(3) The hydraulic retention time is short: NO in high ammonia environment 2 - The denitrification rate of-N is generally higher than that of NO 3 - The denitrification rate of the-N is about 63 percent higher, NH 4 + Is also greater than NO 2 - The oxidation rate of (2) is high, so that the hydraulic retention time can be shortened, and the volume of the reactor is correspondingly reduced;
(4) The residual sludge yield is low: the apparent yield coefficient of nitrite bacteria is 0.04-0.13 gVSS/gN, and the apparent yield coefficient of nitrate bacteria is 0.02-0.07 g VSS/gN.NO 2 - Denitrifying bacteria and NO 3 - The apparent yield coefficients of denitrifying bacteria are 0.345g VSS/gN and 0.765g VSS/g N respectively, so that sludge production can be reduced by 24-33% in the short-cut nitrification and denitrification process, and sludge production can be reduced by 50% in the denitrification process;
(5) The added alkalinity can be reduced.
In addition, the equipment used in the traditional denitrification process occupies a large area, the operation control is difficult to realize to achieve the high ammonia nitrogen removal effect, and the treatment effect on the wastewater containing high ammonia nitrogen is poor.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a high-efficiency biological denitrification device for solving the difficulties of the prior art.
To achieve the above and other related objects, the present invention provides a high efficiency biological nitrogen removal apparatus comprising, from front to rear:
an anaerobic zone 001, wherein the anaerobic zone 001 receives the high ammonia nitrogen wastewater from the regulation to carry out flora growth propagation;
the mud-water separation adjusting device 002, wherein the mud-water separation adjusting device 002 receives mud-water mixed liquid from the anaerobic zone 001 and divides the mud-water mixed liquid into supernatant liquid and lower sludge;
a contact mixing zone 003, wherein the contact mixing zone 003 receives supernatant liquid and lower sludge from the mud-water separation adjusting device 002, and is mixed after dosing by a medicament injection device 025 arranged;
a high-efficiency denitrification area 004, wherein the high-efficiency denitrification area 004 receives liquid from the contact mixing area 003 and adopts a submerged propeller 015 to form circumferential flow for biological denitrification;
a carbon oxidation zone 005, wherein the liquid entering the carbon oxidation zone 005 shuttles in the biological denitrification filler 017 to degrade organic matters in water;
the liquid entering the strong nitrosation zone 006 shuttles into the nitrosation bacterium reinforced filler 019, and the nitrosation reaction is carried out by a second aeration device 018 arranged at the bottom;
the precipitation area 007 receives the mixed solution treated by the strong nitrosation area 006 for mud-water separation, and the up-to-standard supernatant is ejected from the top water outlet overflow device 021.
According to a preferred embodiment, the anaerobic zone 001 comprises a first pond 100 and a first variable speed stirrer 011, wherein the first variable speed stirrer 011 is coaxially arranged with the first pond 100.
According to a preferred embodiment, the mud-water separation adjusting device 002 comprises:
a second pool 200;
a supernatant overflow pipe 012, wherein the supernatant overflow pipe 012 is installed at the upper water outlet of the second water tank 200 and is connected with the contact mixing area 003;
the bottom sludge constant casting pipe 023 is arranged at the bottom sludge port of the No. two water tank 200 and conveys sludge to the contact mixing area 003.
According to the preferred scheme, contact mixing area 003 includes No. three pond 300, no. two variable speed mixer 013 and medicament jettisoningdevice 025, medicament jettisoningdevice 025 installs at No. three pond 300 top, carries out intensive mixing through No. two variable speed mixer 013 to the mixed solution in No. three pond 300.
According to a preferred embodiment, a second variable speed mixer 013 is coaxially disposed with the third basin 300.
According to a preferred embodiment, the high efficiency denitrification region 004 comprises:
a fourth pool 400;
a submersible propeller 015, wherein the submersible propeller 015 is arranged at the bottom of the fourth water tank 400 to form a circular flow;
a surface turning brush 014 is mounted on the top inner side of the fourth tank 400 to turn the surface mixed liquid.
According to a preferred embodiment, the flocs within the high efficiency denitrification region 004 are of a size of 50-100 microns.
According to a preferred scheme, the carbon oxidation zone 005 comprises a No. five water tank 500 and biological denitrification fillers 017 arranged at two ends of the No. five water tank 500, and a No. one aeration device 016 is further arranged at the bottom of the No. five water tank 500.
According to a preferred scheme, the strong nitrosation zone 006 comprises a No. six water tank 600 and nitrosation bacteria reinforced filler 019 which are arranged at two sides of the No. six water tank 600 at equal intervals, and a plurality of No. two aeration devices 018 which are arranged intermittently are also arranged at the bottom of the No. six water tank 600;
a nitrifying liquid reflux device 024 is also installed in the sixth water tank 600 to reflux the mixed liquid to the front contact mixing area 003.
According to a preferred embodiment, the aeration device No. two 018 employs a point source aeration device.
According to a preferred scheme, the sedimentation area 007 comprises a seventh water tank 700, a central guide cylinder 020 is arranged in the seventh water tank 700, and a water outlet overflow device 021 is arranged at the top of the seventh water tank 700 to discharge water reaching standards;
the seventh water tank 700 further comprises a sludge reflux device 022, and sludge outlet pipes of the sludge reflux device 022 are respectively connected to feed inlets of the contact mixing zone 003, the high-efficiency denitrification zone 004, the carbon oxidation zone 005 and the strong nitrosation zone 006.
According to a preferred embodiment, the first water tank 100, the second water tank 200 and the third water tank 300 adopt square-shaped water tanks.
According to a preferred embodiment, the fourth water tank 400, the fifth water tank 500, and the sixth water tank 600 are ring-shaped water tanks.
The invention adopts the structure of the process combination bag to realize the efficient removal of the wastewater with high ammonia nitrogen, the occupied area of equipment used by the whole set of treatment process is greatly reduced, the required additional carbon source and oxygen for operation are greatly reduced compared with the traditional process, a great amount of energy consumption is saved, and the operation load impact resistance of the system greatly enhances the more stable and reliable operation effect.
Preferred embodiments for carrying out the present invention will be described in more detail below with reference to the attached drawings so that the features and advantages of the present invention can be easily understood.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 shows a cross-sectional view A-A of the present invention;
FIG. 3 shows a B-B cross-sectional view of the present invention;
FIG. 4 shows a C-C cross-sectional view of the present invention;
FIG. 5 shows a process flow diagram of the present invention;
description of the reference numerals
001. An anaerobic zone, 100, a first water tank, 011, a first variable speed stirrer;
002. a mud-water separation adjusting device 200, a No. two water tank 012, a supernatant overflow pipe 023 and a bottom sludge fixed-throwing pipe;
003. the contact mixing area, 300, a third water tank, 013, a second speed regulating stirrer, 025 and a medicament feeder;
004. a high-efficiency denitrification area, a 400 # water tank, a 014 # water tank, a surface rotating brush, 015 # water-submerged propeller;
005. a carbon oxidation area, a No. 500 water tank, a No. 016 aeration device, a No. 017 biological denitrification filler;
006. a strong nitrosation zone, 600, a No. six water tank, 018, a No. two aeration device, 019, nitrosation bacteria reinforced filler, 024 and a nitrified liquid reflux device;
007. a sedimentation area, a No. 700 water tank, a 020 water tank, a central draft tube, a 021 water outlet overflow device, a 022 water outlet overflow device and a sludge reflux device.
Detailed Description
In order to make the objects, technical solutions and advantages of the technical solutions of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
Possible embodiments within the scope of the invention may have fewer components, have other components not shown in the drawings, different components, differently arranged components or differently connected components, etc. than the examples shown in the drawings. Furthermore, two or more of the elements in the figures may be implemented in a single element or a single element shown in the figures may be implemented as multiple separate elements.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The invention provides a high-efficiency biological denitrification device which is used in a short-cut nitrification and denitrification process, the invention does not limit the type of sewage, but the device integrates the structures of an anaerobic zone 001, a mud-water separation regulating device 002, a contact mixing zone 003, a high-efficiency denitrification zone 004, a carbon oxidation zone 005, a strong nitrosation zone 006 and a sedimentation zone 007, which are particularly suitable for biological denitrification, and can be seen in figures 1-4, which show the arrangement relation of the anaerobic zone 001, the mud-water separation regulating device 002, the contact mixing zone 003, the high-efficiency denitrification zone 004, a carbon oxidation zone 005, the strong nitrosation zone 006 and the sedimentation zone 007.
In the use process, the regulated high ammonia nitrogen wastewater enters an anaerobic zone 001 to ensure the growth and reproduction of flora and the improvement of biochemical property in water under the anaerobic biological sludge degradation condition, and in order to increase the biological reproduction force for improving the mixing efficiency, the anaerobic zone 001 is arranged to have a square structure of a first water tank 100 and a first variable speed-regulating mixer 011, wherein the first variable speed-regulating mixer 011 is arranged in the first water tank 100 and is coaxially arranged with the first water tank 100, so that the anaerobic biological flora and the entered wastewater are completely mixed in a reaction zone;
the sludge-water mixed liquid after anaerobic treatment enters a sludge-water separation adjusting device 002, a supernatant overflow pipe 012 is arranged on a square water tank 200 in the sludge-water separation adjusting device 002, the top supernatant which is diluted in the sludge-water separation adjusting device 002 can enter a contact mixing area 003 through the supernatant overflow pipe 012, in addition, a bottom sludge port of the water tank 200 is also connected with a bottom sludge fixed-throwing pipe 023, the bottom sludge fixed-throwing pipe 023 is provided with a pipeline flowmeter, and anaerobic sludge at the lower part separated by the sludge-water separation adjusting device 002 can be quantitatively introduced into the contact mixing area 003;
the iron flocculant is added into the contact mixing area 003 through a medicament feeder 025 arranged at the top of a square water tank 300, and the reflux sludge and the reflux mixed liquid are mixed, and fully and uniformly mixed in the contact mixing area 003 under the regulation of a speed regulating stirrer 013 at the top of the water tank 300, wherein the speed regulating stirrer 013 and the water tank 300 are coaxially arranged for further improving the stirring efficiency;
the mixed and regulated self-flowing water enters a high-efficiency denitrification area 004, a submersible propeller 015 is arranged at the bottom of the No. four water tank 400 to form annular water flow, in addition, the No. four water tank 400 is arranged into a water tank with an annular structure for facilitating the annular flow, the regulated mixed liquid is circulated under the action of the submersible propeller 015, and in addition, the surface mixed liquid is transferred by combining a surface transfer brush 014 at the top of the No. four water tank 400, so that the working environment is subjected to a high-efficiency biological denitrification process; in the process, preferably, the particle size of the internal floccules is 50-100 microns, the concentration is high, meanwhile, measures such as DO in the internal can be controlled, the realization of short-range nitrification and denitrification can be realized more easily, and the denitrification efficiency is greatly improved;
the mixed solution after the removal of most N overflows into a carbon oxidization area 005, the entered wastewater laterally enters a No. five water tank 500, in addition, in order to be convenient for forming a circular flow, the No. five water tank 500 is arranged into a water tank with a circular structure, the water flow flows in a circular way, and the running water shuttles in the high-efficiency denitrification filler 017 areas at the two sides of the No. five water tank 500, and the organic matters in the water are degraded under the living metabolism action of the aerobic bacteria by combining with a No. one aeration device 016 at the bottom of the No. five water tank 500;
the mixed liquor after carbon oxidation biodegradation overflows into a strong nitrosation zone 006, the mixed liquor flowing into the strong nitrosation zone 006 flows in a circumferential direction in a No. six water tank 600, in addition, in order to form a circumferential flow conveniently, the No. six water tank 600 is arranged into a water tank with a ring structure, the flowing mixed liquor shuttles into nitrosation bacteria reinforced fillers 019 at two sides of the No. six water tank 600, meanwhile, a second aeration device 018 is arranged at the bottom of the No. six water tank 600, a point source aeration device is adopted by the second aeration device 018, an oxygen source is provided for nitrosation reaction of nitrosation bacteria, the treated mixed liquor enters the tail end of the reaction, and the mixed liquor is partially and quantitatively refluxed to a front contact mixed zone 003 through a mixed liquor reflux device 24;
the rest mixed liquid automatically flows into a subsequent sedimentation area 007, the wastewater flows into a central guide cylinder 020 in a square No. seven water tank 700, water flows into the periphery by the central guide cylinder 020 in the No. seven water tank 700 in a uniform distribution manner, mud water is separated, the separated mud is precipitated in a mud bucket at the bottom, the mud in the mud bucket flows back to a contact mixing area 003, a high-efficiency denitrification area 004, a carbon oxidation area 005 and a strong nitrosation area 006 at the front end under the action of a mud reflux device 022, and supernatant fluid after mud water separation reaches the standard of yielding water in a yielding water overflow device 021.
In use, wastewater enters an anaerobic tank 001 in a uniform manner, macromolecular substances in the water are degraded under the anaerobic hydrolysis acidification effect, biochemical lines are improved, meanwhile, low oxidation-reduction potential (ORP: 150 mV-300 mV) and DO (DO) which are formed in an anaerobic environment are less than or equal to 0.1mg/L, the wastewater is mixed with mixed reflux and sludge reflux to form an efficient denitrification tank 004, hydraulic retention time HRT=24, DO:0.5-1mg/L, iron aggregation flocs formed by iron salt are added, so that the synthesis of iron enzymes is facilitated, and meanwhile, the formed micro flocs are compact, and different dissolved oxygen concentration gradient environments are created for microbial flora, and due to the fact that water temperature is controlled in the following steps: 20-30 ℃, PH:8, the formed microenvironment is more beneficial to the formation of Ammonia Oxidizing Bacteria (AOB), the forming bacteria are beneficial to the formation of nitrite, nitrite (NO 2- -N) denitrification and denitrification are realized under the action of anoxic denitrification bacteria, the formation of device system short-cut nitrification-denitrification and denitrification is realized, NH3-N of inlet water is 450-600mg/L, NH3-N of outlet water is 45-65mg/L, the removal rate is more than 85%, and for inlet water CODcr is 5000-6000mg/L, outlet water CODcr is 300-500mg/L, and the removal rate is more than 90%.
After the high-efficiency denitrification reaction treatment, most COD and NH3-N in water are removed, the mixed solution after the degradation treatment automatically flows into a carbon oxidation pond 005, the mixed solution acts to degrade organic matrixes in the water, the parameters are controlled to be DO to be 2-4mg/L, the inflow CODcr to be 300-500mg/L, the outflow CODcr to be 120-170mg/L, the carbon oxidation utilizes organisms to biodbolize and degrade organic matters in the water in an aerobic environment, the organic matters in the water are relatively high to easily induce the dominant growth of an iso-oxygen type flora, so that the higher organic matters and high dissolved oxygen are degraded under the biodegradation action of the heterotrophic type flora, and the hydraulic retention time in the carbon oxidation pond is HRT=24 hours;
the organic matrix in the wastewater after passing through the carbon oxidation pond is mostly degraded, so that the dominant growth of heterotrophic bacteria in a subsequent strong nitrosation reaction pond is not induced, DO is 1-1.5mg/L, the nitrosation biological bacteria grows on the high-efficiency denitrification filler, the conversion of residual NH3-N in the wastewater into NO 2-N is realized, and the formed mixed solution flows back to the front-end high-efficiency denitrification reaction pond to realize short-range nitrification and denitrification (SND).
The method has the advantages that the effective removal of NH3-N and COD in the wastewater is realized through the high-efficiency biological denitrification reaction at the front end, the biological degradation treatment effect of biological bacterial groups with different effects in the mixed liquor is not separated, the external appearance of the biological formation is formed biological sludge, the separation of the biological sludge in the mixed liquor and the treated effluent water is realized for reducing the loss of the biological sludge, the final biochemical secondary sedimentation tank can realize mud-water separation, the separated supernatant reaches the standard and is discharged, the sludge deposited at the bottom flows back to each reaction pond at the front end, and the sludge concentration of each system device is ensured to meet the treatment effect requirement of stable operation of the system.
The following are shown as the detection results:
the above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (8)
1. A high efficiency biological nitrogen removal apparatus, comprising:
the anaerobic zone (001), the anaerobic zone (001) receives the high ammonia nitrogen wastewater from the regulation to carry out flora growth and reproduction;
the sludge-water separation adjusting device (002), the sludge-water separation adjusting device (002) receives the sludge-water mixed solution from the anaerobic zone (001) and divides the sludge-water mixed solution into supernatant fluid and lower sludge;
a contact mixing zone (003), wherein the contact mixing zone (003) receives supernatant liquid and lower sludge from the mud-water separation regulating device (002), and the supernatant liquid and the lower sludge are mixed after dosing by a medicament injection device (025) arranged;
the high-efficiency denitrification region (004), the high-efficiency denitrification region (004) receives liquid from the contact mixing region (003) and adopts a submerged propeller (015) to form circumferential flow for biological denitrification;
a carbon oxidation zone (005), wherein the liquid entering the carbon oxidation zone (005) shuttles in a biological denitrification filler (017) to degrade organic matters in water;
a strong nitrosation zone (006), liquid entering the strong nitrosation zone (006) shuttles into nitrosation bacteria reinforced filler (019), and nitrosation reaction is carried out through a second aeration device (018) arranged at the bottom;
and the sedimentation zone (007) is used for receiving the mixed liquor treated by the strong nitrosation zone (006) to carry out mud-water separation, and the supernatant reaching the standard is ejected out from the top water outlet overflow device (021).
2. The efficient biological nitrogen removal apparatus as recited in claim 1, wherein the anaerobic zone (001) comprises a first pond (100) and a first variable speed stirrer (011), the first variable speed stirrer (011) being coaxially disposed with the first pond (100).
3. The efficient biological nitrogen removal apparatus as claimed in claim 2, wherein the mud-water separation adjustment apparatus (002) comprises:
a second pool (200);
a supernatant overflow pipe (012), wherein the supernatant overflow pipe (012) is arranged at the upper water outlet of the second water tank (200) and is connected with the contact mixing area (003);
the bottom sludge fixed throwing pipe (023), the bottom sludge fixed throwing pipe (023) is arranged at the bottom sludge port of the No. two water tank (200) and conveys sludge to the contact mixing area (003).
4. A high efficiency biological nitrogen removal apparatus as claimed in claim 3, wherein the contact mixing zone (003) comprises a No. three pond (300), a No. two variable speed mixer (013) and a medicament delivery device (025), the medicament delivery device (025) is mounted on top of the No. three pond (300), and the mixed liquid in the No. three pond (300) is fully mixed by the No. two variable speed mixer (013).
5. The efficient biological nitrogen removal apparatus as recited in claim 4, wherein the efficient nitrogen removal zone (004) includes: a fourth pool (400);
the submersible propeller (015) is arranged at the bottom of the fourth water tank (400) to form annular flow;
and a surface rotating brush (014), wherein the surface rotating brush (014) is arranged on the inner side of the top of the fourth water tank (400) to rotate and beat the surface mixed liquid.
6. The efficient biological nitrogen removal device according to claim 5, wherein the carbon oxidation zone (005) comprises a No. five water tank (500) and biological nitrogen removal fillers (017) arranged at two ends of the No. five water tank (500), and a No. one aeration device (016) is further arranged at the bottom of the No. five water tank (500).
7. The efficient biological nitrogen removal device according to claim 6, wherein the strong nitrosation zone (006) comprises a No. six water tank (600) and nitrosation bacteria reinforcing fillers (019) which are arranged at two sides of the No. six water tank (600) at equal intervals, and a plurality of No. two aeration devices (018) which are arranged intermittently are arranged at the bottom of the No. six water tank (600);
and a nitrifying liquid reflux device (024) is also arranged in the sixth water tank (600) to reflux the mixed liquid to the front end contact mixing area (003).
8. The efficient biological nitrogen removal device according to claim 7, wherein the sedimentation zone (007) comprises a seventh water tank (700), a central guide cylinder (020) is arranged in the seventh water tank (700), and a water outlet overflow device (021) is arranged at the top of the seventh water tank to discharge standard water;
the seventh water tank (700) further comprises a sludge reflux device (022), and sludge outlet pipes of the sludge reflux device (022) are respectively connected to feed inlets of the contact mixing zone (003), the high-efficiency denitrification zone (004), the carbon oxidation zone (005) and the strong nitrosation zone (006).
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