CN113582340A - Industrial wastewater total nitrogen treatment system - Google Patents
Industrial wastewater total nitrogen treatment system Download PDFInfo
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- CN113582340A CN113582340A CN202110890321.3A CN202110890321A CN113582340A CN 113582340 A CN113582340 A CN 113582340A CN 202110890321 A CN202110890321 A CN 202110890321A CN 113582340 A CN113582340 A CN 113582340A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 164
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 82
- 239000010842 industrial wastewater Substances 0.000 title claims abstract description 48
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 31
- 239000001301 oxygen Substances 0.000 claims abstract description 31
- 239000003344 environmental pollutant Substances 0.000 claims description 107
- 231100000719 pollutant Toxicity 0.000 claims description 107
- 239000002351 wastewater Substances 0.000 claims description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 61
- 239000010802 sludge Substances 0.000 claims description 59
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 34
- 239000000835 fiber Substances 0.000 claims description 22
- 239000012528 membrane Substances 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000033116 oxidation-reduction process Effects 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 12
- 238000004065 wastewater treatment Methods 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 description 14
- 241001148470 aerobic bacillus Species 0.000 description 11
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 10
- 241000894006 Bacteria Species 0.000 description 9
- 239000007787 solid Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000000356 contaminant Substances 0.000 description 7
- 241000589151 Azotobacter Species 0.000 description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 description 5
- 235000017550 sodium carbonate Nutrition 0.000 description 5
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 241000186660 Lactobacillus Species 0.000 description 3
- 241000193998 Streptococcus pneumoniae Species 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229940039696 lactobacillus Drugs 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- -1 nitrate ions Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- 206010018364 Glomerulonephritis Diseases 0.000 description 1
- 241000168053 Pseudomonas denitrificans (nomen rejiciendum) Species 0.000 description 1
- 241001509286 Thiobacillus denitrificans Species 0.000 description 1
- 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 1
- 238000005273 aeration Methods 0.000 description 1
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- 230000033228 biological regulation Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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- 239000006228 supernatant Substances 0.000 description 1
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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
-
- 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
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
Abstract
The utility model provides a total nitrogen processing system of industrial waste water, including the anaerobism pond, with the good oxygen pond of anaerobism pond intercommunication, and multistage AO ecological area, multistage AO ecological area includes a plurality of anoxic zones and a plurality of aerobic zone, a plurality of anoxic zones and a plurality of aerobic zone are intercommunication in turn, just an anoxic zone that a plurality of anoxic zones and the aerobic tank is close to with good oxygen pond intercommunication. The industrial wastewater total nitrogen treatment system has higher wastewater treatment efficiency and better wastewater treatment effect.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an industrial wastewater total nitrogen treatment system.
Background
A multi-stage anaerobic/Oxic (AO) ecological pool is usually adopted to remove total nitrogen pollutants and ammonia nitrogen pollutants in the wastewater. However, the Chemical Oxygen Demand (COD) pollutant content in wastewater is high, and the high COD pollutant content affects the biodegradability of wastewater, resulting in poor wastewater treatment and low efficiency.
Disclosure of Invention
In view of this, it is necessary to provide a total nitrogen treatment system for industrial wastewater to solve the problems of poor wastewater treatment effect and low efficiency of the existing multi-stage AO ecological pool.
The utility model provides a total nitrogen processing system of industrial waste water, including the anaerobism pond, with the good oxygen pond of anaerobism pond intercommunication, and multistage AO ecological area, multistage AO ecological area includes a plurality of anoxic zones and a plurality of aerobic zone, a plurality of anoxic zones and a plurality of aerobic zone are intercommunication in turn, just an anoxic zone that a plurality of anoxic zones and the aerobic tank is close to with good oxygen pond intercommunication.
Further, the anaerobic tank is communicated with at least one anoxic zone of the plurality of anoxic zones; and/or
The anaerobic tank is communicated with at least one aerobic zone of the plurality of aerobic zones.
Further, the multistage AO ecological region further comprises a sludge collecting tank and a sludge pressure filter communicated with the sludge collecting tank, wherein the sludge collecting tank is communicated with the anaerobic tank, the aerobic tank, the anoxic zones and the aerobic zones.
Further, the industrial wastewater total nitrogen treatment system also comprises a regulating reservoir communicated with the anaerobic reservoir and the sludge filter press, and the regulating reservoir is used for controlling the water quality uniformity of the wastewater.
Further, the industrial wastewater total nitrogen treatment system also comprises a water inlet buffer tank communicated between the anaerobic tank and the regulating tank, wherein the water inlet buffer tank is used for regulating the pH value of wastewater; and/or
The industrial wastewater total nitrogen treatment system further comprises an accident pool communicated with the regulating pool, and the accident pool is used for storing wastewater with the water quality exceeding the standard.
Further, the industrial wastewater total nitrogen treatment system also comprises a fiber filter, and the fiber filter is communicated with an aerobic zone of the aerobic zones, which is adjacent to the fiber filter.
Further, the industrial wastewater total nitrogen treatment system further comprises a water storage tank and at least one backflow pump, wherein the water storage tank is communicated with the fiber filter tank, the water storage tank is communicated with at least one anoxic zone of the anoxic zones, and the at least one backflow pump is connected between the water storage tank and the at least one anoxic zone of the anoxic zones.
Further, the total nitrogen processing system of industrial waste water still includes COD pollutant on-line monitoring appearance, ammonia nitrogen pollutant monitor, total nitrogen pollutant monitor, redox pond, and goes out the water buffer pool, COD pollutant on-line monitoring appearance, ammonia nitrogen pollutant monitor and total nitrogen pollutant monitor all are connected with the tank, redox pond and play water buffer pool all communicate with the tank.
Further, the industrial wastewater total nitrogen treatment system also comprises a membrane bioreactor tank communicated with the water storage tank and the water outlet buffer tank; and/or
The industrial wastewater total nitrogen treatment system also comprises a denitrification filter tank communicated with the water storage tank and the effluent buffer tank.
Further, the industrial wastewater total nitrogen treatment system also comprises a dissolved oxygen online monitor and a roots blower connected with the dissolved oxygen online monitor, wherein the dissolved oxygen online monitor and the roots blower are connected with the anaerobic tank, the aerobic tank, the anoxic zones and the aerobic zones.
The industrial wastewater total nitrogen treatment system provided by the invention comprises an anaerobic pool, an aerobic pool communicated with the anaerobic pool, and a multi-stage AO ecological zone, wherein the multi-stage AO ecological zone comprises a plurality of anoxic zones and a plurality of aerobic zones, the anoxic zones and the aerobic zones are alternately communicated, and one anoxic zone of the anoxic zones, which is adjacent to the aerobic pool, is communicated with the aerobic pool. The wastewater can sequentially pass through the anaerobic tank, the aerobic tank and the multi-stage AO ecological area. Most COD pollutants in the wastewater can be removed by the anaerobic tank, and the subsequent denitrification reaction can be prevented from being influenced by higher COD pollutants. The aerobic tank can remove COD pollutants and ammonia nitrogen pollutants in the wastewater. The total nitrogen pollutants in the wastewater can be removed by a plurality of anoxic zones in the multi-stage AO ecological zone, and the COD pollutants and ammonia nitrogen pollutants in the wastewater can be further removed by a plurality of aerobic zones in the multi-stage AO ecological zone. The anaerobic tank, the aerobic tank, the anoxic zones and the aerobic zones are matched, so that COD pollutants, ammonia nitrogen pollutants and total nitrogen pollutants in the wastewater are effectively and efficiently removed.
Drawings
FIG. 1 is a block diagram of an industrial wastewater total nitrogen treatment system according to an embodiment of the present invention.
Description of the main elements
Industrial wastewater total nitrogen treatment system 100 sludge collecting tank 45
Sludge press filter 47 of pretreatment tank 10
Return pump 49 of regulating reservoir 11
Multistage AO ecological region 40 denitrification filter 80
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes all and any combination of one or more of the associated listed items.
In various embodiments of the present invention, for convenience in description and not in limitation, the term "coupled" as used in the specification and claims of the present application is not limited to physical or mechanical couplings, either direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1, an embodiment of the invention provides a system 100 for treating total nitrogen in industrial wastewater.
The industrial wastewater total nitrogen treatment system 100 comprises an anaerobic tank 20, an aerobic tank 30 communicated with the anaerobic tank 20, and a multi-stage AO ecological zone 40, wherein the multi-stage AO ecological zone 40 comprises a plurality of anoxic zones 41 and a plurality of aerobic zones 43, the plurality of anoxic zones 41 and the plurality of aerobic zones 43 are alternately communicated, and one anoxic zone 41 of the plurality of anoxic zones 41 adjacent to the aerobic tank 30 is communicated with the aerobic tank 30.
In at least one embodiment, the multi-stage AO ecoregion 40 comprises a first-stage anoxic region, a first-stage aerobic region, a second-stage anoxic region, a second-stage aerobic region, a third-stage anoxic region, a third-stage aerobic region, a fourth-stage anoxic region, a fourth-stage aerobic region, a fifth-stage anoxic region, and a fifth-stage aerobic region, which are sequentially connected.
In at least one embodiment, the anaerobic tank 20, the aerobic tank 30, the primary anoxic zone, the secondary anoxic zone, the tertiary anoxic zone, the quaternary anoxic zone, the fifth anoxic zone, the primary aerobic zone, and the secondary aerobic zone are provided with three-phase separators, so that only the supernatant in each treatment tank can flow to the next treatment tank. The three-stage aerobic zone, the four-stage aerobic zone and the five-stage aerobic zone are internally provided with biochemical fillers which can be polyester, can be used for biomembrane carriers and has the function of intercepting suspended matters. By the arrangement, the industrial wastewater total nitrogen treatment system 100 can treat wastewater with COD pollutant concentration up to 4000mg/L, ammonia nitrogen pollutant concentration up to 300mg/L and total nitrogen pollutant concentration up to 300mg/L, and in the wastewater treated by the industrial wastewater total nitrogen treatment system 100, the COD pollutant concentration is less than 250mg/L, the ammonia nitrogen pollutant concentration is less than 20mg/L and the total nitrogen pollutant concentration is less than 25 mg/L.
In at least one embodiment, the anaerobic tank 20 has a biological fluidized bed configuration to effectively remove COD contaminants from the wastewater and improve the biodegradability of the wastewater.
In at least one embodiment, the wastewater is placed in the anaerobic tank 20 for 24-36 hours, in the aerobic tank 30 for 24-36 hours, in each anoxic zone 41 for 3-6 hours, and in each aerobic zone 43 for 3-6 hours.
In at least one embodiment, the industrial wastewater total nitrogen treatment system 100 has a COD contaminant removal rate of about 94%, an ammonia nitrogen removal rate of about 93.3%, and a total nitrogen removal rate of about 93.3%.
The industrial wastewater total nitrogen treatment system 100 provided by the invention comprises an anaerobic tank 20, an aerobic tank 30 communicated with the anaerobic tank 20, and a multi-stage AO ecological zone 40, wherein the multi-stage AO ecological zone 40 comprises a plurality of anoxic zones 41 and a plurality of aerobic zones 43, the anoxic zones 41 and the aerobic zones 43 are alternately communicated, and one anoxic zone 41 of the anoxic zones 41 adjacent to the aerobic tank 30 is communicated with the aerobic tank 30. The wastewater may pass through the anaerobic tank 20, the aerobic tank 30, and the multi-stage AO ecoregion 40 in sequence. The anaerobic tank 20 can remove most of the COD pollutants in the wastewater, and prevent the subsequent denitrification reaction from being influenced by higher COD pollutants. The aerobic tank 30 can remove COD pollutants and ammonia nitrogen pollutants in the wastewater. The anoxic zones 41 in the multi-stage AO ecological zone 40 remove total nitrogen pollutants in the wastewater by using COD pollutants as carbon sources. The aerobic zones 43 in the multi-stage AO ecological zone 40 can further remove COD pollutants and ammonia nitrogen pollutants in the wastewater. The anaerobic tank 20, the aerobic tank 30, the anoxic zones 41 and the aerobic zones 43 are matched, so that COD pollutants, ammonia nitrogen pollutants and total nitrogen pollutants in the wastewater are effectively and efficiently removed.
The anaerobic tank 20 can be communicated with at least one anoxic zone 41 of the plurality of anoxic zones 41 and can also be communicated with at least one aerobic zone 43 of the plurality of aerobic zones 43.
In the technical scheme of the invention, the anaerobic tank 20 can be communicated with at least one anoxic zone 41 of the anoxic zones 41 and also can be communicated with at least one aerobic zone 43 of the aerobic zones 43 so as to realize multi-stage water inflow, ensure that the wastewater entering the anoxic zones 41 and the aerobic zones 43 contains COD pollutants with certain concentration, and provide a carbon source for denitrification.
The multistage AO ecological region 40 further comprises a sludge collecting tank 45, a sludge press filter 47 communicated with the sludge collecting tank 45, an MLSS (Mixed light Suspended Solids) online monitor and an adjusting tank 11 communicated with the anaerobic tank 20 and the sludge press filter 47, wherein the sludge collecting tank 45 and the MLSS online monitor are communicated with the anaerobic tank 20, the aerobic tank 30, a plurality of anoxic zones 41 and a plurality of aerobic zones 43, and the adjusting tank 11 is used for controlling the water quality uniformity of the wastewater.
In at least one embodiment, anaerobic sludge with the concentration of 4000-5000 mg/L is arranged in the anaerobic tank 20, anaerobic bacteria in the anaerobic sludge are dominant flora, and COD pollutants can be hydrolyzed and acidified. The temperature in the anaerobic tank 20 is 25-35 ℃ so as to ensure that the anaerobic bacteria have better activity.
In at least one embodiment, the concentration of the COD contaminant in the wastewater treated by the anaerobic tank 20 is 500-700 mg/L.
In at least one embodiment, aerobic sludge with a concentration of 4000 to 5000mg/L is disposed in the aerobic tank 30, and aerobic bacteria in the aerobic sludge are dominant bacteria. The aerobic sludge in the aerobic tank 30 can be subjected to nitrification reaction with the wastewater so as to remove most of COD pollutants and ammonia nitrogen pollutants in the wastewater and generate carbon sources and nitrate ions. The temperature of the aerobic tank 30 is 25-35 ℃, so as to ensure that the aerobic bacteria have better activity. The aerobic bacteria can be at least one of symbiotic azotobacter, self-produced azotobacter, lactobacillus, diplococcus pneumoniae and sulfur bacteria.
In at least one embodiment, the concentration of the COD pollutant is 300-500 mg/L and the concentration of the ammonia nitrogen pollutant is 20-40 mg/L in the wastewater treated by the aerobic tank 30.
In at least one embodiment, anaerobic sludge with a concentration of 4000-5000 mg/L is arranged in the anoxic zone 41, and denitrifying bacteria in the anaerobic sludge are dominant flora. After the sewage passing through the aerobic tank 30 enters the anoxic zone 41, under an anoxic environment, anaerobic sludge in the anoxic zone 41 can perform denitrification reaction with the wastewater to convert nitrate nitrogen into nitrogen so as to remove total nitrogen pollutants in the wastewater. The temperature of the anoxic zone 41 is 25-35 ℃ to ensure that the anaerobic bacteria have better activity. The denitrifying bacteria may be at least one of glomerulonephritis, pseudomonas denitrificans, and thiobacillus denitrificans.
It will be appreciated that sodium acetate or glucose may also be added to the anoxic zone 41 to promote the reaction efficiency of the denitrification reaction. The ratio of the addition amount of sodium acetate or glucose to the removal amount of nitrogen is 2.9-3.1: 1.
in at least one embodiment, the concentration of total nitrogen pollutants in the wastewater treated by the anoxic zone 41 is 20-30 mg/L.
In at least one embodiment, the aerobic zone 43 is provided with aerobic sludge with a concentration of 4000 to 5000mg/L, and the aerobic bacteria in the aerobic sludge are dominant bacteria. The aerobic sludge in the aerobic zone 43 can be subjected to a nitrification reaction with the wastewater to remove COD contaminants and ammonia nitrogen contaminants in the wastewater and generate a carbon source and nitrate ions. The temperature of the aerobic zone 43 is 25-35 ℃ to ensure that the aerobic bacteria have better activity. The aerobic bacteria can be at least one of symbiotic azotobacter, self-produced azotobacter, lactobacillus, diplococcus pneumoniae and sulfur bacteria.
In at least one embodiment, the concentration of the COD pollutant is 200-400 mg/L and the concentration of the ammonia nitrogen pollutant is 20-30 mg/L in the wastewater treated by the aerobic tank 30.
It will be appreciated that soda ash may also be added to the aerobic tank 30 and aerobic zone 43 to enhance the reaction efficiency of the nitrification reaction.
In at least one embodiment, the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41, and the aerobic zones 43 independently contain sludge, so that the anaerobic bacteria and the aerobic bacteria in the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41, and the aerobic zones 43 are prevented from inhibiting each other, and the wastewater outlet system 100 has a better wastewater treatment effect and a higher treatment efficiency.
In at least one embodiment, the wastewater from the plant materialization workshop can be introduced into the regulating reservoir 11, and a submersible mixer (not shown) is arranged in the regulating reservoir 11 to control the water quality of the wastewater to be uniform.
It is understood that the sludge concentration on-line monitor can monitor the suspended solids concentration values of the activated sludge in the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41, and the aerobic zones 43 in real time. When the suspended solid concentration value of the activated sludge in the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41 and the aerobic zones 43 is greater than 6000mg/L, sludge discharge valves at the bottoms of the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41 and the aerobic zones 43 can be automatically opened, the sludge is discharged into a sludge collecting tank 45, the sludge can be dewatered by the sludge press filter 47 to obtain filter cakes and press filtration water, the filter cakes can be buried, and the press filtration water can be returned to the regulating tank 11 for retreatment.
In at least one embodiment, the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41, and the aerobic zones 43 are all provided with an online sludge concentration monitor. Each of the on-line sludge concentration monitors is provided in the middle area of the inner walls of the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41, and the aerobic zones 43.
In the technical scheme of the invention, the sludge collecting tank 45 is communicated with the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41 and the aerobic zones 43, and the activated sludge in the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41 and the aerobic zones 43 is relatively independent, so that the inhibition effect (for example, a COD pollutant with higher concentration in wastewater inhibits nitration reaction in the aerobic tank 30 and the aerobic zone 43) caused by mutual contact of the activated sludge in the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41 and the aerobic zones 43 is avoided, and the sewage treatment efficiency and effect of the activated sludge in the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41 and the aerobic zones 43 are improved.
The industrial wastewater total nitrogen treatment system 100 further comprises a water inlet buffer tank 13 communicated between the anaerobic tank 20 and the regulating tank 11 and a pH value on-line monitor connected with the water inlet buffer tank 13, wherein the water inlet buffer tank 13 is used for regulating the pH value of wastewater.
In at least one embodiment, soda ash and acid can be added into the water inlet buffer tank 13 to adjust the pH value of the wastewater to be between 7.5 and 8.5.
In at least one embodiment, a submersible mixer (not shown) is disposed in the inlet buffer tank 13 to mix the soda ash, the acid, and the wastewater uniformly.
In at least one embodiment, the wastewater in the influent buffer tank 13 can be delivered to the anaerobic tank 20 by an influent pump (not shown).
In the technical scheme of the invention, the industrial wastewater total nitrogen treatment system 100 further comprises a water inlet buffer tank 13 communicated between the anaerobic tank 20 and the regulating tank 11, and a pH value on-line monitor connected with the water inlet buffer tank 13. And adding soda ash and acid into the water inlet buffer tank 13 to adjust the pH value of the wastewater to be 7.5-8.5. When the pH value of the wastewater is between 7.5 and 8.5, the biological activity of the activated sludge is better, so that the aims of quickly and efficiently removing COD pollutants, ammonia nitrogen pollutants and total nitrogen pollutants are fulfilled.
The industrial wastewater total nitrogen treatment system 100 further comprises an accident pool 15 communicated with the regulating pool 11, wherein the accident pool 15 is used for storing wastewater with overproof water quality.
When the COD pollutant concentration of the wastewater in the regulating tank 11 is more than 4000mg/L, the ammonia nitrogen pollutant concentration is more than 300mg/L, and the total nitrogen pollutant concentration TN is more than 300mg/L, the wastewater lift pump is automatically started, and the wastewater is conveyed to the accident tank 15 for temporary storage. The wastewater in the accident tank 15 can be transferred to the regulation tank 11 in a small amount, and when the concentration of each pollutant in the wastewater in the accident tank 15 is ensured to be less than the corresponding value, the wastewater is transferred to the influent buffer tank 13.
The industrial wastewater total nitrogen treatment system 100 further comprises a fiber filter 50, a water storage tank 51 communicated with the fiber filter 50, at least one backflow pump 49, a Membrane bioreactor tank 70 communicated with the water storage tank 51, a denitrification filter 80 communicated with the water storage tank 51, and an effluent buffer tank 90 communicated with the denitrification filter 80 and the Membrane Bioreactor (MBR) tank 70. The fiber filter 50 is communicated with an aerobic zone 43 of the plurality of aerobic zones 43 adjacent to the fiber filter 50, the water storage tank 51 is communicated with at least one anoxic zone 41 of the plurality of anoxic zones 41, and the at least one reflux pump 49 is connected between the water storage tank 51 and the at least one anoxic zone 41 of the plurality of anoxic zones 41.
In one embodiment, the fiber filter 50 is in communication with the five stage aerobic zone.
In an embodiment, the water storage tank 51 is communicated with at least one of the primary anoxic zone, the secondary anoxic zone, the tertiary anoxic zone, the fourth and anoxic zones, and the fifth anoxic zone, so that the wastewater in the water storage tank 51 flows back to the anoxic zone communicated with the water storage tank 51 to further remove pollutants in the wastewater, thereby improving the wastewater treatment effect of the industrial wastewater total nitrogen treatment system 100. The reflux ratio of the waste water in the water storage tank 51 can be 40-60%.
In at least one embodiment, the installed density of the fiber filter material in the fiber filter 50 is 2.5 x 2.5cm, so as to ensure that the concentration of the solid suspended matter in the effluent is less than 10 mg/L.
It will be appreciated that the fiber filter 50 acts as a filtration unit to retain sludge in the effluent from the five stage aerobic zone to reduce solids suspension in the wastewater entering the membrane bioreactor tank 70 and/or denitrification filter 80.
In at least one embodiment, the MBR membrane with a pore size of 0.04 μm is disposed in the membrane bioreactor tank 70 to remove COD pollutants and ammonia nitrogen pollutants in the wastewater.
In at least one embodiment, aerobic sludge with a concentration of 5000-6000 mg/L is disposed in the membrane bioreactor tank 70, so that COD pollutants and ammonia nitrogen pollutants in wastewater can be removed. In the aerobic sludge, aerobic bacteria are dominant flora. The aerobic bacteria can be at least one of symbiotic azotobacter, self-produced azotobacter, lactobacillus, diplococcus pneumoniae and sulfur bacteria.
In at least one embodiment, the denitrification filter 80 is provided with denitrification solid fillers with the particle size of 3-5 mm to form a biological membrane of denitrification flora. The denitrification efficiency of the denitrification filter 80 is not lower than 0.4kg/m3。
In the technical scheme of the invention, the industrial wastewater total nitrogen treatment system 100 further comprises a fiber filter 50, a water storage tank 51 communicated with the fiber filter 50, at least one reflux pump 49, a Membrane bioreactor tank 70 communicated with the water storage tank 51, a denitrification filter 80 communicated with the water storage tank 51, and an effluent buffer tank 90 communicated with the denitrification filter 80 and the Membrane Bioreactor (MBR) tank 70. The fiber filter 50 serves as a filtering unit and can intercept floating mud in the effluent of the five-stage aerobic zone so as to reduce solid suspended matters of the wastewater entering the membrane bioreactor tank 70 and/or the denitrification filter 80. The water storage tank 51 is communicated with at least one of the plurality of anoxic zones, so that the wastewater in the water storage tank 51 flows back to the anoxic zone communicated with the water storage tank 51, and pollutants in the wastewater are further removed, thereby improving the wastewater treatment effect of the industrial wastewater total nitrogen treatment system 100. The membrane bioreactor tank 70 can remove COD pollutants and ammonia nitrogen pollutants in the wastewater. The denitrification filter 80 can remove the total nitrogen pollutants in the wastewater.
The industrial wastewater total nitrogen treatment system 100 further comprises a pH value online monitor (not shown), a dissolved oxygen online monitor (not shown), an oxidation-reduction potential online monitor (not shown), a COD pollutant online monitor (not shown), an ammonia nitrogen pollutant monitor (not shown), a total nitrogen pollutant monitor (not shown), an oxidation-reduction pond 60 and an effluent buffer pond 90, wherein the pH value online monitor, the dissolved oxygen online monitor, the COD pollutant online monitor, the ammonia nitrogen pollutant monitor and the total nitrogen pollutant monitor are all connected with the water storage pond 51, and the oxidation-reduction pond 60 and the effluent buffer pond 90 are all communicated with the water storage pond 51.
The concentration effluent of each pollutant reaches the standard: the concentration of COD pollutant is less than 250mg/L, the concentration of ammonia nitrogen pollutant is less than 20mg/L, and the concentration of total nitrogen is less than 25 mg/L.
In at least one embodiment, when the concentration of the total nitrogen contaminants in the wastewater in the reservoir 51 is too high (e.g., greater than 50mg/L), the wastewater in the reservoir 51 can be fed to the redox pool 60, the redox pool 60 can be a redox device, and the concentration of nitrogen-containing organic substances in the wastewater can be reduced to less than 50mg/L, and then the wastewater can be fed to the anaerobic pool 20. When the concentration of each pollutant in the wastewater in the water storage tank 51 reaches the standard, the wastewater can be directly conveyed into the water outlet buffer tank 90.
The wastewater in the water storage tank 51 can also be conveyed to the membrane bioreactor tank 70 to further remove the total nitrogen in the wastewater.
The concentration effluent of each pollutant reaches the standard: the concentration of COD pollutant is less than 250mg/L, the concentration of ammonia nitrogen pollutant is less than 20mg/L, and the concentration of total nitrogen is less than 25 mg/L.
In at least one embodiment, the online redox potential monitor is connected to the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41, and the first to third aerobic zones to determine the redox capacity. When the redox capacity is weak, sludge may be discharged into the sludge collection tank 45 through a sludge discharge valve.
In at least one embodiment, the sludge index of the sludge in the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41 and the aerobic zones 43 is between 60 and 100, and the sludge sedimentation ratio is between 20 and 30%. If the sludge index and the sludge settlement ratio of the sludge are higher or lower than the above values, the sludge can be discharged into the sludge collecting tank 45 through the sludge discharge valve.
In at least one embodiment, the number of the on-line oxidation-reduction potential monitors is multiple, and the multiple on-line oxidation-reduction potential monitors are respectively connected with the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41 and the first-level to third-level aerobic zones corresponding to the multiple on-line oxidation-reduction potential monitors.
In at least one embodiment, the number of the pH value on-line monitor, the dissolved oxygen on-line monitor, the COD pollutant on-line monitor, the ammonia nitrogen pollutant monitor, and the total nitrogen pollutant monitor is plural, the adjusting tank 11, the inlet buffer tank 13, the accident tank 15, the anaerobic tank 20, the aerobic tank 30, each anoxic zone 41, each aerobic zone 43, the fiber filter 50, the water storage tank 51, the oxidation reduction tank 60, the membrane bioreactor tank 70, the denitrification filter 80, and the outlet buffer tank 90 are all provided with a pH value on-line monitor, a COD pollutant on-line monitor, an ammonia nitrogen pollutant monitor, and a total nitrogen pollutant monitor, so as to monitor the pH value, COD pollutant concentration, ammonia nitrogen pollutant concentration, and total nitrogen pollutant concentration of the wastewater in the wastewater treatment tank in real time.
In at least one embodiment, the dissolved oxygen on-line monitor can be used for detecting the dissolved oxygen amount of the wastewater.
In at least one embodiment, roots blowers (not shown) may be disposed in the adjusting tank 11, the inlet buffer tank 13, the accident tank 15, the anaerobic tank 20, the aerobic tank 30, each anoxic zone 41, each aerobic zone 43, the fiber filter 50, the water storage tank 51, the redox tank 60, the membrane bioreactor tank 70, the denitrification filter 80 and the outlet buffer tank 90 to increase the dissolved oxygen content of the wastewater.
In at least one embodiment, the dissolved oxygen of the wastewater in the denitrification filter 80 is 0.42-0.72 mg/L, which is beneficial to the growth of denitrifying bacteria in the denitrification filter, so as to promote the efficient denitrification reaction.
In at least one embodiment, the dissolved oxygen of the wastewater in the aerobic tank 30 and the plurality of aerobic zones 43 is 3.4-3.8 mg/L, which is beneficial to the growth of aerobic bacteria, so as to promote the efficient nitrification reaction. When the pH value of the wastewater in the aerobic tank 30 and the plurality of aerobic zones 43 is less than 7, the dissolved oxygen amount of the wastewater in the aerobic tank 30 and the plurality of aerobic zones 43 can be controlled to be 4.23-5.67 mg/L, and soda ash is timely added into the aerobic tank 30 and the plurality of aerobic zones 43, so that the pH value of the wastewater in the aerobic tank 30 and the plurality of aerobic zones 43 is 7.5-8.5.
In at least one embodiment, the dissolved oxygen of the wastewater in the aerobic tank 30 and the plurality of aerobic zones 43 is 3.4-3.8 mg/L, which is beneficial to the growth of aerobic bacteria, so as to promote the efficient nitrification reaction.
In at least one embodiment, the dissolved oxygen of the wastewater in the anoxic zones 41 is 0.3-0.8 mg/L, which is beneficial to the growth of denitrifying bacteria, so as to promote the efficient denitrification reaction.
In at least one embodiment, the dissolved oxygen of the wastewater in the anaerobic tank 20 is 0.3-0.8 mg/L (preferably 0.12-0.18 mg/L), which is beneficial to the growth of anaerobic bacteria to promote the efficient denitrification reaction.
It can be understood that the dissolved oxygen of the wastewater in the anaerobic tank 20, the aerobic tank 30, the anoxic zones 41, the aerobic zones 43, the membrane bioreactor tank 70 and the denitrification filter tank 80 can be adjusted by the stirring effect of the aeration of the chassis.
In at least one embodiment, the dissolved oxygen of the wastewater in the fiber filter 50 is 0.66-0.78 mg/L, which is beneficial to removing the suspended solids.
In at least one embodiment, the dissolved oxygen content of the wastewater in the membrane bioreactor tank 70 is 4.27-5.63 mg/L, which is beneficial to removing the total nitrogen pollutants.
In at least one embodiment, the industrial wastewater total nitrogen treatment system 100 further includes a plurality of frequency converters, each frequency converter is connected to a corresponding roots blower to control the power of the roots blower, so as to control the dissolved oxygen amount of the wastewater and achieve the purpose of energy saving and consumption saving.
In at least one embodiment, the industrial wastewater total nitrogen treatment system 100 further comprises a controller, wherein the controller is connected with the pH value online monitor, the oxidation reduction potential online monitor, the dissolved oxygen online monitor, the COD pollutant online monitor, the ammonia nitrogen pollutant monitor and the total nitrogen pollutant monitor to control the automatic operation of the pH value online monitor, the oxidation reduction potential online monitor, the dissolved oxygen online monitor, the COD pollutant online monitor, the ammonia nitrogen pollutant monitor and the total nitrogen pollutant monitor.
In at least one embodiment, when the concentration of the total nitrogen contaminants in the wastewater in the reservoir 51 is too high, the wastewater in the reservoir 51 may be transferred to the redox pool 60, and the redox pool 60 may be a redox device capable of degrading nitrogen-containing organic substances in the wastewater and then transferring the wastewater to the anaerobic pool 20. When the concentration of each pollutant in the wastewater in the water storage tank 51 reaches the standard, the wastewater can be directly conveyed to the outlet buffer tank 90. When the concentration of each pollutant in the wastewater in the water storage tank 51 does not reach the standard of directly delivering to the outlet buffer tank 90, the wastewater can be delivered to the membrane bioreactor tank 70.
In at least one embodiment, the redox pool 60 can be used to degrade nitrogenous organic compounds in water by micro-electrolysis, and the pH of the wastewater in the redox pool 60 can be adjusted to 3-4 or 6-7 as required.
In the technical scheme of the invention, the industrial wastewater total nitrogen treatment system 100 further comprises a pH value online monitor, an oxidation-reduction potential online monitor, an oxygen dissolution online monitor, a COD pollutant online monitor, an ammonia nitrogen pollutant monitor, a total nitrogen pollutant monitor, an oxidation-reduction tank 60 and an effluent buffer tank 90, wherein the pH value online monitor, the oxygen dissolution online monitor, the COD pollutant online monitor, the ammonia nitrogen pollutant monitor and the total nitrogen pollutant monitor are all connected with the water storage tank 51 so as to perform online monitoring on the wastewater in the water storage tank 51.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (10)
1. The total nitrogen treatment system for the industrial wastewater is characterized by comprising an anaerobic tank, an aerobic tank communicated with the anaerobic tank and a multi-stage AO ecological zone, wherein the multi-stage AO ecological zone comprises a plurality of anoxic zones and a plurality of aerobic zones, the anoxic zones and the aerobic zones are alternately communicated, and one anoxic zone of the anoxic zones, which is close to the aerobic tank, is communicated with the aerobic tank.
2. The industrial wastewater total nitrogen treatment system of claim 1, wherein the anaerobic tank is in communication with at least one anoxic zone of the plurality of anoxic zones; and/or
The anaerobic tank is communicated with at least one aerobic zone of the plurality of aerobic zones.
3. The industrial wastewater total nitrogen treatment system of claim 1, wherein said multi-stage AO ecoregion further comprises a sludge collecting tank and a sludge pressure filter in communication with said sludge collecting tank, said sludge collecting tank being in communication with said anaerobic tank, aerobic tank, anoxic zones, and aerobic zones.
4. The industrial wastewater total nitrogen treatment system of claim 3, further comprising a conditioning tank in communication with the anaerobic tank and the sludge pressure filter, the conditioning tank being configured to control the water quality uniformity of the wastewater.
5. The industrial wastewater total nitrogen treatment system according to claim 4, further comprising a water inlet buffer tank communicated between the anaerobic tank and the adjusting tank, wherein the water inlet buffer tank is used for adjusting the pH value of wastewater; and/or
The industrial wastewater total nitrogen treatment system further comprises an accident pool communicated with the regulating pool, and the accident pool is used for storing wastewater with the water quality exceeding the standard.
6. The industrial wastewater total nitrogen treatment system of claim 1, further comprising a fiber filter in communication with an aerobic zone of the plurality of aerobic zones adjacent to the fiber filter.
7. The industrial wastewater total nitrogen treatment system of claim 6, further comprising a reservoir in communication with the fiber filter tank, and at least one reflux pump connected between the reservoir and at least one of the anoxic zones.
8. The industrial wastewater total nitrogen treatment system according to claim 7, further comprising a COD pollutant on-line monitor, an ammonia nitrogen pollutant monitor, a total nitrogen pollutant monitor, an oxidation reduction tank and an effluent buffer tank, wherein the COD pollutant on-line monitor, the ammonia nitrogen pollutant monitor and the total nitrogen pollutant monitor are all connected with the water storage tank, and the oxidation reduction tank and the effluent buffer tank are all communicated with the water storage tank.
9. The industrial wastewater total nitrogen treatment system of claim 7, further comprising a membrane bioreactor tank in communication with the water storage tank and the effluent buffer tank; and/or
The industrial wastewater total nitrogen treatment system also comprises a denitrification filter tank communicated with the water storage tank and the effluent buffer tank.
10. The industrial wastewater total nitrogen treatment system of claim 7, further comprising a dissolved oxygen on-line monitor and a roots blower connected to the dissolved oxygen on-line monitor, wherein the dissolved oxygen on-line monitor and the roots blower are connected to the anaerobic tank, the aerobic tank, the anoxic zones, and the aerobic zones.
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