CN108658230B - Device and method for strengthening denitrification and dephosphorization by AAO + BAF (anaerobic anoxic/oxic + BAF) process based on DEAMOX (anoxic/oxic) filter tank - Google Patents
Device and method for strengthening denitrification and dephosphorization by AAO + BAF (anaerobic anoxic/oxic + BAF) process based on DEAMOX (anoxic/oxic) filter tank Download PDFInfo
- Publication number
- CN108658230B CN108658230B CN201810236775.7A CN201810236775A CN108658230B CN 108658230 B CN108658230 B CN 108658230B CN 201810236775 A CN201810236775 A CN 201810236775A CN 108658230 B CN108658230 B CN 108658230B
- Authority
- CN
- China
- Prior art keywords
- anoxic
- baf
- water
- filter
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 title claims abstract description 31
- 238000005728 strengthening Methods 0.000 title claims description 12
- 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 claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 31
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 27
- 239000011574 phosphorus Substances 0.000 claims abstract description 27
- 238000004062 sedimentation Methods 0.000 claims abstract description 20
- 239000010865 sewage Substances 0.000 claims abstract description 17
- 239000010802 sludge Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 230000014759 maintenance of location Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 140
- 238000005273 aeration Methods 0.000 claims description 22
- 239000000945 filler Substances 0.000 claims description 21
- 241000894006 Bacteria Species 0.000 claims description 20
- 230000001546 nitrifying effect Effects 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 15
- 229910002651 NO3 Inorganic materials 0.000 claims description 13
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 11
- 239000000370 acceptor Substances 0.000 claims description 6
- 238000011001 backwashing Methods 0.000 claims description 6
- 208000037534 Progressive hemifacial atrophy Diseases 0.000 claims description 5
- 244000005700 microbiome Species 0.000 claims description 5
- 238000012017 passive hemagglutination assay Methods 0.000 claims description 5
- 229920000903 polyhydroxyalkanoate Polymers 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 3
- 230000001651 autotrophic effect Effects 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000011496 polyurethane foam Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims 3
- 229910052760 oxygen Inorganic materials 0.000 claims 3
- 239000001301 oxygen Substances 0.000 claims 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 2
- 206010021143 Hypoxia Diseases 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000002950 deficient Effects 0.000 claims 1
- 230000007954 hypoxia Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 30
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 13
- 238000007254 oxidation reaction Methods 0.000 abstract description 11
- 230000003647 oxidation Effects 0.000 abstract description 10
- 229910021529 ammonia Inorganic materials 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000009418 renovation Methods 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000010992 reflux Methods 0.000 description 14
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- QALQXPDXOWOWLD-UHFFFAOYSA-N [N][N+]([O-])=O Chemical compound [N][N+]([O-])=O QALQXPDXOWOWLD-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010841 municipal wastewater Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- 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
基于DEAMOX的后置缺氧滤池强化AAO+BAF工艺脱氮除磷的装置与方法属于活性污泥法污水处理领域。其装置主要由AAO、二沉池、曝气生物滤池BAF以及后置缺氧滤池组成。本方法通过在低C/N比条件下控制缺氧区的平均水力停留时间在3‑8h之间来实现同步反硝化除磷；通过BAF实现高效的硝化；设置后置缺氧滤池，将二沉池出水中的氨氮(NH4 +‑N)和BAF出水中的硝氮(NO3 ‑‑N)混合，投加碳源，在后置缺氧滤池内形成短程反硝化+厌氧氨氧化的DEAMOX反应，克服AAO+BAF工艺出水含有硝态氮的劣势，进一步去除市政污水总氮。本发明适用于低C/N比市政污水条件下，市政污水厂的建造、提标改造等，能够达到保证出水总氮，出水水质稳定的要求。
The device and method for enhancing nitrogen and phosphorus removal in AAO+BAF process based on a post anoxic filter based on DEAMOX belong to the field of activated sludge process sewage treatment. The device is mainly composed of AAO, secondary sedimentation tank, biological aerated filter BAF and post anoxic filter. The method realizes synchronous denitrification and phosphorus removal by controlling the average hydraulic retention time of the anoxic zone to be between 3-8h under the condition of low C/N ratio; realizes high-efficiency nitrification through BAF; The ammonia nitrogen (NH 4 + ‑N) in the effluent of the secondary sedimentation tank is mixed with the nitrate nitrogen (NO 3 ‑ ‑N) in the effluent of the BAF, and carbon source is added to form a short-range denitrification + anaerobic acid in the post anoxic filter The DEAMOX reaction of ammonia oxidation overcomes the disadvantage that the effluent of the AAO+BAF process contains nitrate nitrogen, and further removes the total nitrogen in municipal sewage. The invention is suitable for the construction, upgrading and renovation of municipal sewage plants under the condition of low C/N ratio municipal sewage, and can meet the requirements of ensuring total nitrogen in effluent and stable effluent quality.
Description
Technical Field
The invention relates to a device and a method for deep nitrogen and phosphorus removal, belongs to the technical field of activated sludge process treatment, and is suitable for the technical fields of municipal sewage treatment with low C/N ratio, deep treatment, upgrading transformation and the like.
Background
Along with the continuous promotion of urbanization and the continuous improvement of the living standard of people in China, the discharge amount of urban sewage is greatly improved, the discharge of nitrogen and phosphorus in the sewage can cause eutrophication of water bodies, and the removal of nitrogen and phosphorus elements by sewage treatment plants is more and more critical. At present, the effluent TN (total nitrogen, recorded as N) of a plurality of water plants hardly reaches the first-class A emission standard (the effluent TN is less than or equal to 15mg/L) of pollutant emission standard (GB18918-2002) of municipal wastewater treatment plants. At present, more and more cities set up more demanding landmarks (for example, the demand of TN in the A standard of the local standard DB 11/890-.
The AAO-BAF process has emerged precisely in the requirements of this era, which solves two major problems of conventional sewage treatment plants: the contradiction between the sludge age of nitrifying bacteria and the sludge age of heterotrophic bacteria and how to synchronously remove nitrogen and phosphorus under the condition of low C/N ratio.
Anammox (Anammox) uses Nitrite (NO) by Anammox bacteria under anoxic conditions2 --N) as electron acceptor, reacting ammonia Nitrogen (NH)4 +N) oxidation to nitrogen. The discovery of anaerobic ammonia oxidation can greatly save carbon sources in sewage, and compared with the traditional activated sludge process, the anaerobic ammonia oxidation process has higher denitrification efficiency.
The DEAMOX (denitrifying Ammonium oxidation) process is a new denitrification process which is provided by combining heterotrophic denitrification on the basis of an anaerobic ammonia oxidation process in 2006 at the university of Delft in the Netherlands, and aims at ammonia Nitrogen (NH)4 +-N) and nitrate Nitrogen (NO)3 -The waste water of-N) has good removal ability. Wherein one of the nitrite salts of the anaerobic ammonia oxidation reaction substrate comes from intermediate product Nitrite (NO) of the denitrification process3 --N→ NO2 -N), the process overcomes the difficulty that short-cut denitrification is difficult to stay, and effectively solves the problem of nitrite sources in anaerobic ammonia oxidation substrates.
Disclosure of Invention
The invention aims to provide a device and a method for deeply removing nitrogen and phosphorus from municipal sewage with low C/N ratio. The AAO + BAF process has a good treatment effect on sewage treatment with a low C/N ratio, and has the process advantages that: 1. the HRT of the anoxic zone is reasonably increased to provide convenience for the growth of the denitrifying phosphorus removal bacteria DPAOs, and the carbon source is utilized in the anoxic zone to simultaneously regenerate two processes of denitrification and phosphorus removal, so that the purpose of one carbon for two purposes is achieved, and the carbon source in the raw water is saved; 2. overcomes the contradiction of different sludge ages of two microorganisms, namely nitrifying bacteria and heterotrophic bacteria, and adopts a double-sludge method to separate the nitrification process and the denitrification process to generate NH containing ammonia nitrogen in the process4 +Effluent of secondary sedimentation tank of-N and nitrate nitrogen NO3 -N BAF effluent. The effluent of the original process basically reaches the first grade A discharge standard of pollutants for municipal wastewater treatment plants (GB18918-2002)The standard, but at present, China has higher requirements for the treatment capacity of town sewage plants, wherein the Beijing City sewage discharge Standard (DB 11/890-. The invention utilizes NH containing ammonia nitrogen generated in the AAO-BAF process4 +-N and nitrate nitrogen NO3 -And (3) combining water of the-N by using a DEAMOX process, providing good growth conditions for heterotrophic microorganisms and anaerobic ammonium oxidation bacteria by using a post-anoxic filter, and realizing the further removal of TN under the condition of adding a carbon source.
A device for strengthening the denitrification and dephosphorization of the AAO + BAF process based on a DEAMOX post-anoxic filter tank is characterized in that: enters an AAO reactor (2) by a water inlet pump (1), is connected with a secondary sedimentation tank (8), is connected with a Biological Aerated Filter (BAF) (12), is connected with a post-anoxic filter (24), and finally is treated to output water by a water outlet (28) on the post-anoxic filter (24); the AAO reactor (2) comprises an anaerobic zone (3), an anoxic zone (4) and an aerobic zone (5) which are sequentially connected; the aerobic tank (5) is connected with a secondary sedimentation tank (8) through an overflow port (7); the effluent of the secondary sedimentation tank (8) flows into an intermediate water tank (9) and enters the biological aerated filter BAF (12) from the intermediate water tank (9) through a BAF water inlet pump (11); aerobic filler (13) is arranged in the biological aerated filter BAF (12), and effluent of the biological aerated filter enters the final water tank (10) through a BAF water outlet (14); the water stored in the final water tank (10) returns to the anoxic zone (4) through a nitrifying liquid reflux pump (15); sludge-water mixed liquor at the bottom of the secondary sedimentation tank (8) enters the anaerobic zone (3) through a sludge reflux pump (16); the middle water tank (9) is provided with an ammonia nitrogen water outlet (20) and enters the post-positioned anoxic filter tank (24) through an ammonia nitrogen water inlet pump (21); the final water tank (10) is provided with a nitrate nitrogen water outlet (22) and enters a post-anoxic filter chamber (24) through a nitrate nitrogen water inlet pump (23); water containing carbon sources is filled in the carbon source water tank (26) and enters the post-anoxic filter (24) through a carbon source pump (27); an anoxic filler (25) is arranged in the post-positioned anoxic filter (24).
A device for strengthening the denitrification and dephosphorization of an AAO + BAF process based on a DEAMOX post-anoxic filter tank is characterized in that stirring devices (6) are arranged in an anaerobic zone (3) and an anoxic zone (4); a fan (17) is connected to an aerobic zone aeration device (18) to aerate the aerobic zone (5); the fan (17) is simultaneously connected to a BAF aeration device (19) in the BAF (12) of the aeration biological filter tank to aerate the BAF (12) of the aeration biological filter tank.
A method for strengthening the denitrification and dephosphorization of an AAO + BAF process by a post anoxic filter based on DEAMOX is characterized by comprising the following steps:
(1) municipal sewage enters an AAO reactor (2) through a water inlet pump (1), anaerobic phosphorus release is carried out in an anaerobic zone (3), denitrifying phosphorus removal bacteria DPAOs synthesize internal carbon sources PHAs by utilizing COD in raw water, phosphorus is released at the same time, and the hydraulic retention time HRT of the anaerobic zone (3) is controlled to be 1-2 h;
(2) mixed liquor enters an anoxic zone (4) from an anaerobic zone (3), simultaneously effluent water from a Biological Aerated Filter (BAF) (12) accumulated in a final water tank (10) enters the anoxic zone (4) through a nitrifying liquid reflux pump (15), and DPAOs take PHAs as electron donors and nitrate nitrogen NO as an electron donor3 -N is an electron acceptor to carry out denitrification phosphorus uptake, and HRT of the anoxic zone (4) is controlled to be 3-8 h;
(3) the mixed liquor enters an aerobic zone (5) from the anoxic zone (4), at this stage, the residual COD in the mixed liquor is degraded, the residual phosphorus is absorbed, and the HRT of the aerobic zone (5) is controlled to be 0.5-1 h;
(4) mixed liquor enters a secondary sedimentation tank (8) from an overflow port (7) of the aerobic zone (5) to realize sludge-water separation, phosphorus absorbed into microorganisms is discharged during sludge discharge, and NH containing ammonia nitrogen4 +-N water flows into the intermediate tank (9) with a sludge reflux ratio set to 0.75:1-1.5: 1;
(5) NH containing ammonia nitrogen4 +N water is accumulated in an intermediate water tank (9) and enters a Biological Aerated Filter (BAF) (12) through a BAF water inlet pump after reaching a full tank state, a large amount of aerobic filler (13) is arranged in the Biological Aerated Filter (BAF), the aerobic filler (13) is a polypropylene hollow ring, the filling ratio is 35-75%, and the specific surface area is 200m2/m3-800m2/m3The density is 0.96-1.00g/cm3Aerobic autotrophic nitrifying bacteria grow on the water tank, nitrification is carried out under the aeration condition, and effluent enters a final water tank (10);
(6) the water in the final water tank (10) contains nitrate nitrogen NO3 --N, via nitrifying liquid reflux pump (15) back to anoxic zone (4) to provide electrons for DPAOsA receptor, wherein the reflux ratio of the nitrifying liquid is set to be 2:1-4: 1;
(7) NH containing ammonia nitrogen4 +Water in the-N intermediate water tank (20) enters a post-positioned anoxic filter tank (24) through an ammonia nitrogen inlet pump (21) and contains nitrate nitrogen NO3 -Water in the-N final water tank (10) enters a post-anoxic filter tank (24) through a nitrate nitrogen water inlet pump (23), the HRT of the post-anoxic filter tank (24) is set to be 0.5-3h, and ammonia nitrogen NH is added4 +N and nitro-nitrogen NO3 -The mass concentration ratio of N after water inflow is set to be 1:1.1-1:1.6, water containing carbon sources is filled in a carbon source water tank (26) and enters a post-positioned anoxic filter tank (24) through a carbon source pump (27), and COD and nitric nitrogen NO after water inflow are3 -The mass concentration ratio of N is set to be 1.2:1-2: 1;
(8) an anoxic filler (25) is arranged in the post-anoxic filter tank (24), the anoxic filler (25) is polyurethane foam, the filling ratio is 50-80 percent, the porosity is 92-94 percent, and the density is 0.22-0.25g/cm3Denitrifying bacteria and anaerobic ammonium oxidation bacteria grow on the anaerobic filter bed, DEAMOX reaction is carried out under the anoxic condition, TN is further removed, and the water outlet of a water outlet (28) of the postposition anoxic filter bed (24) is the final outlet water;
(9) when the outflow velocity of the post-anoxic filter (24) is reduced by 30%, the blockage is considered to require backwashing, the flow rates of the ammonia nitrogen inlet pump (21) and the nitrate nitrogen inlet pump (23) are increased, and the backwashing strength is set to be 12-15L/(s.m)2) Discharging the discharged water;
a device and a method for strengthening the denitrification and dephosphorization of the AAO + BAF process based on a DEAMOX post-anoxic filter tank are characterized in that growth advantages are provided for denitrifying phosphorus removal bacteria by increasing the HRT of an anoxic zone (4), so that 'one-carbon dual-purpose' of denitrification and dephosphorization is achieved; ensuring complete nitrification by separating nitrifying bacteria to the filler of the BAF (12) of the aeration biological filter; NH containing ammonia nitrogen is introduced by adding a post-positioned anoxic filter (24)4 +The effluent of the secondary sedimentation tank (8) of the-N and nitrate nitrogen NO3 -And (3) the effluent of the BAF (12) of the aeration biological filter tank of the-N finishes DEAMOX reaction under the condition of adding a carbon source, thereby achieving the purpose of further removing TN.
It is to be understood that the above examples are illustrative only for the purpose of clarity of description and are not limiting of the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this invention are intended to be included within the scope of the present invention.
Compared with the traditional continuous flow activated sludge process, the device and the method for strengthening the denitrification and dephosphorization of the AAO + BAF process by the post anoxic filter based on DEAMOX have the following advantages:
1. saving carbon source
2. Deep denitrification, reduced output water TN (total nitrogen, calculated by N) and higher output water requirement
3. Saving aeration quantity
Drawings
FIG. 1 is a diagram of a device for strengthening the denitrification and dephosphorization of the AAO + BAF process by a post anoxic filter based on DEAMOX. Wherein: 1-water inlet pump, 2-AAO reactor, 3-anaerobic zone, 4-anoxic zone, 5-aerobic zone, 6-stirring device, 7-overflow port, 8-secondary sedimentation tank, 9-intermediate water tank, 10-final water tank, 11-BAF water inlet pump, 12-aeration biological filter BAF, 13-aerobic filler, 14-BAF water outlet, 15-nitrifying liquid reflux pump, 16-sludge reflux pump, 17-fan, 18-aerobic zone aeration device, 19-BAF aeration device, 20-ammonia nitrogen water outlet, 21-ammonia nitrogen water inlet pump, 22-nitrate nitrogen water outlet, 23-nitrate nitrogen water inlet pump, 24-postposition anoxic filter tank, 25-anoxic filler, 26-carbon source water tank, 27-carbon source pump and 28-water outlet.
Detailed Description
A device for strengthening the denitrification and dephosphorization of the AAO + BAF process based on a DEAMOX post-anoxic filter tank is characterized in that: enters an AAO reactor (2) by a water inlet pump (1), is connected with a secondary sedimentation tank (8), is connected with a Biological Aerated Filter (BAF) (12), is connected with a post-anoxic filter (24), and finally is treated to output water by a water outlet (28) on the post-anoxic filter (24); the AAO reactor (2) comprises an anaerobic zone (3), an anoxic zone (4) and an aerobic zone (5) which are sequentially connected; the aerobic tank (5) is connected with a secondary sedimentation tank (8) through an overflow port (7); the effluent of the secondary sedimentation tank (8) flows into an intermediate water tank (9) and enters the biological aerated filter BAF (12) from the intermediate water tank (9) through a BAF water inlet pump (11); aerobic filler (13) is arranged in the biological aerated filter BAF (12), and effluent of the biological aerated filter enters the final water tank (10) through a BAF water outlet (14); the water stored in the final water tank (10) returns to the anoxic zone (4) through a nitrifying liquid reflux pump (15); sludge-water mixed liquor at the bottom of the secondary sedimentation tank (8) enters the anaerobic zone (3) through a sludge reflux pump (16); the middle water tank (9) is provided with an ammonia nitrogen water outlet (20) and enters the post-positioned anoxic filter tank (24) through an ammonia nitrogen water inlet pump (21); the final water tank (10) is provided with a nitrate nitrogen water outlet (22) and enters a post-anoxic filter chamber (24) through a nitrate nitrogen water inlet pump (23); water containing carbon sources is filled in the carbon source water tank (26) and enters the post-anoxic filter (24) through a carbon source pump (27); an anoxic filler (25) is arranged in the post-positioned anoxic filter (24).
A device for strengthening the denitrification and dephosphorization of an AAO + BAF process based on a DEAMOX post-anoxic filter tank is characterized in that stirring devices (6) are arranged in an anaerobic zone (3) and an anoxic zone (4); a fan (17) is connected to an aerobic zone aeration device (18) to aerate the aerobic zone (5); the fan (17) is simultaneously connected to a BAF aeration device (19) in the BAF (12) of the aeration biological filter tank to aerate the BAF (12) of the aeration biological filter tank.
A method for strengthening the denitrification and dephosphorization of an AAO + BAF process by a post anoxic filter based on DEAMOX is characterized by comprising the following steps:
(1) municipal sewage enters an AAO reactor (2) through a water inlet pump (1), anaerobic phosphorus release is carried out in an anaerobic zone (3), denitrifying phosphorus removal bacteria DPAOs synthesize internal carbon sources PHAs by utilizing COD in raw water, phosphorus is released at the same time, and the hydraulic retention time HRT of the anaerobic zone (3) is controlled to be 1-2 h;
(2) mixed liquor enters an anoxic zone (4) from an anaerobic zone (3), simultaneously effluent water from a Biological Aerated Filter (BAF) (12) accumulated in a final water tank (10) enters the anoxic zone (4) through a nitrifying liquid reflux pump (15), and DPAOs take PHAs as electron donors and nitrate nitrogen NO as an electron donor3 -N is an electron acceptor to carry out denitrification phosphorus uptake, and HRT of the anoxic zone (4) is controlled to be 3-8 h;
(3) the mixed liquor enters an aerobic zone (5) from the anoxic zone (4), at this stage, the residual COD in the mixed liquor is degraded, the residual phosphorus is absorbed, and the HRT of the aerobic zone (5) is controlled to be 0.5-1 h;
(4) mixed liquid enters a secondary sedimentation tank (8) from an overflow port (7) of the aerobic zone (5) to realize muddy waterSeparating, discharging the phosphorus absorbed into the microorganisms during sludge discharge, and containing ammonia nitrogen NH4 +-N water flows into the intermediate tank (9) with a sludge reflux ratio set to 0.75:1-1.5: 1;
(5) NH containing ammonia nitrogen4 +N water is accumulated in an intermediate water tank (9) and enters a Biological Aerated Filter (BAF) (12) through a BAF water inlet pump after reaching a full tank state, a large amount of aerobic filler (13) is arranged in the Biological Aerated Filter (BAF), the aerobic filler (13) is a polypropylene hollow ring, the filling ratio is 35-75%, and the specific surface area is 200m2/m3-800m2/m3The density is 0.96-1.00g/cm3Aerobic autotrophic nitrifying bacteria grow on the water tank, nitrification is carried out under the aeration condition, and effluent enters a final water tank (10);
(6) the water in the final water tank (10) contains nitrate nitrogen NO3 --N, returned to the anoxic zone (4) via a nitrifying liquid reflux pump (15) to provide electron acceptors for DPAOs, the nitrifying liquid reflux ratio being set to 2:1-4: 1;
(7) NH containing ammonia nitrogen4 +Water in the-N intermediate water tank (20) enters a post-positioned anoxic filter tank (24) through an ammonia nitrogen inlet pump (21) and contains nitrate nitrogen NO3 -Water in the-N final water tank (10) enters a post-anoxic filter tank (24) through a nitrate nitrogen water inlet pump (23), the HRT of the post-anoxic filter tank (24) is set to be 0.5-3h, and ammonia nitrogen NH is added4 +N and nitro-nitrogen NO3 -The mass concentration ratio of N after water inflow is set to be 1:1.1-1:1.6, water containing carbon sources is filled in a carbon source water tank (26) and enters a post-positioned anoxic filter tank (24) through a carbon source pump (27), and COD and nitric nitrogen NO after water inflow are3 -The mass concentration ratio of N is set to be 1.2:1-2: 1;
(8) an anoxic filler (25) is arranged in the post-anoxic filter tank (24), the anoxic filler (25) is polyurethane foam, the filling ratio is 50-80%, the porosity is 92-94%, and the density is 0.22-0.25g/cm3Denitrifying bacteria and anaerobic ammonium oxidation bacteria grow on the anaerobic filter bed, DEAMOX reaction is carried out under the anoxic condition, TN is further removed, and the water outlet of a water outlet (28) of the postposition anoxic filter bed (24) is the final outlet water;
(9) when the flow rate of the outlet water of the post-positioned anoxic filter (24) is reducedWhen the concentration is 30 percent, the blockage is considered to require backwashing, the flow rates of the ammonia nitrogen inlet pump (21) and the nitrate nitrogen inlet pump (23) are increased, and the backwashing strength is set to be 12-15L/(s.m)2) And discharging the effluent.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236775.7A CN108658230B (en) | 2018-03-21 | 2018-03-21 | Device and method for strengthening denitrification and dephosphorization by AAO + BAF (anaerobic anoxic/oxic + BAF) process based on DEAMOX (anoxic/oxic) filter tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236775.7A CN108658230B (en) | 2018-03-21 | 2018-03-21 | Device and method for strengthening denitrification and dephosphorization by AAO + BAF (anaerobic anoxic/oxic + BAF) process based on DEAMOX (anoxic/oxic) filter tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108658230A CN108658230A (en) | 2018-10-16 |
| CN108658230B true CN108658230B (en) | 2021-03-02 |
Family
ID=63781984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810236775.7A Active CN108658230B (en) | 2018-03-21 | 2018-03-21 | Device and method for strengthening denitrification and dephosphorization by AAO + BAF (anaerobic anoxic/oxic + BAF) process based on DEAMOX (anoxic/oxic) filter tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108658230B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110510738B (en) * | 2019-08-12 | 2022-02-01 | 欧基（上海）环保科技有限公司 | Aerobic denitrification and dephosphorization enhanced sewage treatment system and method |
| CN111908735A (en) * | 2020-08-28 | 2020-11-10 | 桂林理工大学 | AAO process transformation method for urban sewage treatment plant based on anaerobic ammonia oxidation |
| CN112830627B (en) * | 2020-12-31 | 2022-03-11 | 深圳市澳洁源环保科技有限公司 | Domestic sewage treatment method and integrated treatment equipment |
| CN113362195B (en) * | 2021-05-31 | 2025-02-11 | 中国市政工程华北设计研究总院有限公司 | Configuration method of denitrification process unit for upgrading and reconstruction of sewage treatment plants in industrial agglomeration areas |
| CN115893644B (en) * | 2022-11-05 | 2024-04-19 | 北京工业大学 | Device and method for constructing denitrification and phosphorus removal coupled with anaerobic ammonia oxidation to enhance nitrogen and phosphorus removal in sewage by combined regulation of SRT and HRT |
| CN116282526A (en) * | 2023-05-09 | 2023-06-23 | 海南大学 | Method for enriching anammox bacteria in denitrification filter without inoculation of short-range denitrification sludge and anammox sludge |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217891A (en) * | 2015-10-25 | 2016-01-06 | 北京工业大学 | A is strengthened based on DEAMOX 2the apparatus and method of/O+BAF technique biological carbon and phosphorous removal |
| CN106830573A (en) * | 2017-04-07 | 2017-06-13 | 北京工业大学 | Low energy consumption municipal sewage denitrogenation method based on the capture of reinforcing carbon with Anammox |
-
2018
- 2018-03-21 CN CN201810236775.7A patent/CN108658230B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217891A (en) * | 2015-10-25 | 2016-01-06 | 北京工业大学 | A is strengthened based on DEAMOX 2the apparatus and method of/O+BAF technique biological carbon and phosphorous removal |
| CN106830573A (en) * | 2017-04-07 | 2017-06-13 | 北京工业大学 | Low energy consumption municipal sewage denitrogenation method based on the capture of reinforcing carbon with Anammox |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108658230A (en) | 2018-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108658230B (en) | Device and method for strengthening denitrification and dephosphorization by AAO + BAF (anaerobic anoxic/oxic + BAF) process based on DEAMOX (anoxic/oxic) filter tank | |
| CN110015757B (en) | Method and device for treating municipal sewage by coupling endogenous short-cut denitrification and anaerobic ammonia oxidation in anoxic zone of AOA (argon oxygen decarburization) process | |
| CN110436704B (en) | Urban sewage treatment upgrading and reforming process based on anaerobic ammonia oxidation | |
| CN108423826B (en) | A kind of improved A2O and sulfur autotrophic combined nitrogen and phosphorus removal reactor and sewage treatment method | |
| CN107162193B (en) | Hypoxic nitrification coupled with short-range denitrification anammox treatment of domestic sewage and method | |
| CN109896628B (en) | Device and method for deep denitrification by AOA (PD-ANAMMOX) biomembrane technology | |
| CN105884028B (en) | The apparatus and method of continuous flow municipal sewage short distance nitration Anammox coupling denitrification dephosphorization | |
| CN109485152A (en) | A kind of apparatus and method of continuous flow municipal sewage short-cut denitrification part ANAMMOX advanced nitrogen dephosphorization | |
| CN103121754B (en) | A kind of denitrification dephosphorization technique | |
| CN101817621B (en) | Semi-denitrification-based wastewater treatment technology | |
| CN108585384B (en) | MBBR high-standard sewage treatment system and treatment process | |
| CN102491589B (en) | Coupling denitrification dephosphorization water treatment method for multistage anoxic/oxic (A/O) biological membrane | |
| CN110386740B (en) | Sewage secondary treatment system and treatment method | |
| CN105217891B (en) | Strengthen A based on DEAMOX2The apparatus and method of/O+BAF technique biological carbon and phosphorous removal | |
| CN100569669C (en) | Anaerobic-anoxic oxidation ditch process denitrification phosphorus removal device and method | |
| CN102001785B (en) | Compound biological film integrated reactor for treatment of domestic sewage and application method | |
| CN102690019A (en) | High-efficiency nitrogen and phosphorus synchronous removal method in treating low concentration wastewater | |
| CN108585385B (en) | MBBR sewage treatment system and treatment process | |
| CN107585974B (en) | Sewage treatment method based on MBBR (moving bed biofilm reactor) process | |
| CN113233589A (en) | Device and method for realizing synchronous short-cut nitrification, anaerobic ammonia oxidation, denitrification and dephosphorization advanced treatment of municipal domestic sewage by intermittent aeration | |
| CN110015756A (en) | A denitrification and phosphorus removal coupled vibration anoxic MBR device and process | |
| CN103183454A (en) | Coupling type biological denitrification method and system thereof | |
| CN108545887B (en) | Method for removing hydrogen sulfide by denitrification of sulfide type DEAMOX post-positioned anoxic filter tank based on AAO-BAF process effluent | |
| CN110981078A (en) | Continuous flow device and method for realizing urban sewage denitrification coupled with biological phosphorus removal by anammox | |
| CN207877509U (en) | A kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |