CN115259563A - Improved two-stage AO biochemical treatment system - Google Patents
Improved two-stage AO biochemical treatment system Download PDFInfo
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- CN115259563A CN115259563A CN202210941740.XA CN202210941740A CN115259563A CN 115259563 A CN115259563 A CN 115259563A CN 202210941740 A CN202210941740 A CN 202210941740A CN 115259563 A CN115259563 A CN 115259563A
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- 238000000034 method Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 27
- 238000006396 nitration reaction Methods 0.000 claims abstract description 3
- 239000010802 sludge Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 14
- 238000000108 ultra-filtration Methods 0.000 claims description 10
- 238000010992 reflux Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005273 aeration Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 231100000719 pollutant Toxicity 0.000 claims description 3
- 238000005276 aerator Methods 0.000 claims description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 9
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000004056 waste incineration Methods 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000894006 Bacteria 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
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (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
The invention discloses an improved two-stage AO biochemical treatment system, which comprises a first-stage denitrification tank, a first-stage nitrification tank, a second-stage denitrification tank, a second-stage nitrification tank and a buffer tank which are connected in sequence. The denitrification process section is arranged at the front end of the process, and the comprehensive aerobic process section which removes BOD and performs nitration reaction is arranged at the rear end of the process. The invention has the following advantages and effects: according to the characteristics of high concentration of organic pollutants (COD) and high content of ammonia nitrogen in the refuse incineration leachate, the process can greatly reduce the concentration of the organic pollutants and the ammonia nitrogen in the leachate, save the cost of an external carbon source, and simultaneously, the alkalinity generated by denitrification can compensate the consumption of the alkalinity in the nitrification process.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an improved two-stage A/O biochemical treatment system for the garbage incineration leachate industry, wherein A/O is English abbreviation of oxygen deficiency and oxygen deficiency.
Background
The leachate of the waste incineration plant has the characteristics different from the common urban domestic sewage, such as high BOD5 and CODcr concentrations, high metal content, large water quality and water quantity change, high ammonia nitrogen content, imbalance of microorganism nutrient element proportion and the like, and is difficult to treat to the required discharge standard by adopting the traditional biochemical treatment process. Therefore, the garbage incineration leachate has the characteristics that an improved two-stage A/O biochemical treatment system is designed, and the organic pollutant (COD) load and ammonia nitrogen concentration in the leachate can be effectively reduced.
Disclosure of Invention
The invention aims to provide an improved two-stage A/O biochemical treatment system for the garbage incineration leachate industry, and the process removes organic pollutants (COD) and ammonia nitrogen in leachate according to the characteristics of the leachate of a garbage incineration plant.
The technical purpose of the invention is realized by the following technical scheme: an improved two-stage A/O biochemical treatment system for the garbage incineration leachate industry comprises a first-stage denitrification tank, a first-stage nitrification tank, a second-stage denitrification tank, a second-stage nitrification tank and a buffer tank which are sequentially connected. The denitrification process section is arranged at the front end of the process, and the comprehensive aerobic process section which removes BOD and performs nitration reaction is arranged at the rear end of the process.
The invention is further provided with: and (4) implementing defoaming measures in the primary nitrification tank.
The invention is further provided with: and special jet blast aeration is arranged in the primary nitrification tank and the secondary nitrification tank.
The invention is further provided with: and 2 sets of cooling systems are arranged in the biochemical pool.
The invention is further provided with: and a jet flow stirrer is arranged in the denitrification tank.
The invention is further configured as follows: and reflux pumps are arranged in the first-stage nitrification tank and the second-stage nitrification tank. And respectively refluxing the nitrified liquid into the first-stage denitrification tank and the second-stage denitrification tank.
The invention is further provided with: and a sludge pump is arranged in the buffer tank, and the sludge precipitated in the buffer tank flows back to the primary denitrification tank or is discharged to a sludge system by the sludge pump.
The invention is further provided with: the buffer tank is externally connected with an external ultrafiltration system, and a bag filter is arranged in the external ultrafiltration system to intercept large-particle pollutants.
Has the beneficial effects that:
the leachate of the waste incineration plant has the characteristics of high concentration of organic pollutants (COD) and high content of ammonia nitrogen, and the traditional biochemical treatment is difficult. With the attached figure 1, the improved two-stage AIO biochemical treatment system can effectively reduce the concentration of organic pollutants and the content of ammonia nitrogen in the waste incineration leachate, and does not need to additionally supplement a carbon source and reduce the consumption of alkalinity.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Reference numerals: 1. a first-stage denitrification tank; 2. a first-stage nitrification tank; 3. a second-stage denitrification tank; 4. a secondary nitrification tank; 5. a buffer pool; 6. an external ultrafiltration system.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings
As shown in figure 1, the improved two-stage A/O biochemical treatment system for the garbage incineration leachate industry comprises a first-stage denitrification tank (1), a first-stage nitrification tank (2), a second-stage denitrification tank (3), a second-stage nitrification tank (4) and a buffer tank (5) which are sequentially connected, wherein a denitrification process section is arranged at the front end of the process, and a comprehensive aerobic process section for removing BOD and carrying out nitrification reaction is arranged at the rear end of the process.
Furthermore, a defoaming measure is implemented in the primary nitrification tank (2), due to the particularity of the leachate, a large amount of foam is sometimes generated during the biochemical culture stage and the operation period, the nitrified liquid is separated from the nitrified liquid reflux pump and is sprayed back to the nitrification tank, so that the defoaming purpose is achieved, and the influence on the sludge activity due to the use of a defoaming agent is avoided.
Furthermore, special jet blast aeration is arranged in the first-stage nitrification tank (2) and the second-stage nitrification tank (4), and a jet aeration system consists of a jet aerator, a jet circulating pump and a roots blower. Most organic pollutants in the sewage are degraded in the nitrification tank under the action of high-activity aerobic microorganisms, and simultaneously, ammonia nitrogen is oxidized into nitrate under the action of the nitrification microorganisms.
Furthermore, 2 sets of cooling systems are arranged in the biochemical pool, so that a large amount of heat can be generated in the biochemical process, the temperature of the mixed liquid in the nitrification pool and the denitrification pool is increased, the operation of the biochemical operation and the ultrafiltration system is not facilitated, and the cooling system is arranged for cooling the muddy water mixed liquid in the primary nitrification pool (2).
Furthermore, reflux pumps are arranged in the primary nitrification tank (2) and the secondary nitrification tank (4). The nitrified liquid respectively flows back to the first-stage denitrification tank (1) and the second-stage denitrification tank (3), and the denitrifying bacteria utilize the carbon source in the wastewater to denitrify the nitrate nitrogen in the nitrified liquid into nitrogen, so that the aims of denitrification and removal of organic pollutants are fulfilled.
Furthermore, a sludge pump is arranged in the buffer tank (5), so that the sludge precipitated in the buffer tank (5) flows back to the first-stage denitrification tank (1) or is discharged to a sludge system through the sludge pump, and the blocking condition of the ultrafiltration membrane is relieved.
Further, an external ultrafiltration system (6) is externally connected to the buffer tank (5), and a bag filter is arranged in the external ultrafiltration system (6) to intercept large-particle pollutants and separate sludge from water; and the sludge-water mixed liquor discharged from the ultrafiltration concentration end flows back to the primary denitrification tank (1) to increase the sludge concentration and also serves as nitrification liquid to flow back, and the residual sludge is discharged to the sludge concentration tank to be further treated.
According to the invention, aiming at the characteristics of high concentration of organic pollutants (COD) and high concentration of ammonia nitrogen in the refuse incineration leachate, the method realizes that organic matters in the original wastewater are directly used as an organic carbon source during denitrification reaction, and nitrate in the mixed liquid containing the nitrate and returned from the aerobic process section is denitrified into nitrogen; the alkalinity generated by the denitrification reaction in the denitrification process section can enter the aerobic nitrification process section along with the effluent water to compensate about half of the alkalinity required to be consumed in the nitrification reaction process; furthermore, the aerobic nitrification process section is arranged at the rear end of the process, so that organic matters which are often remained in the denitrification process can be further removed, and the economic expenditure is reduced.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. The improved two-stage AO biochemical treatment system is characterized by comprising a first-stage denitrification tank (1), a first-stage nitrification tank (2), a second-stage denitrification tank (3), a second-stage nitrification tank (4) and a buffer tank (5) which are sequentially connected. The denitrification process section is arranged at the front end of the process, and the comprehensive aerobic process section which removes BOD and performs nitration reaction is arranged at the rear end of the process.
2. An improved two-stage AO biochemical processing system according to claim 1, wherein: defoaming measures are implemented in the primary nitrification tank (2), and nitrified liquid is separated from the nitrified liquid reflux pump and sprayed back to the nitrification tank so as to achieve the purpose of defoaming.
3. An improved two-stage AO biochemical processing system according to claim 1, wherein: the primary nitrification tank (2) and the secondary nitrification tank (4) are internally provided with special jet blast aeration, and a jet aeration system consists of a jet aerator, a jet circulating pump and a Roots blower.
4. An improved two-stage AO biochemical processing system according to claim 1, wherein: 2 sets of cooling systems are arranged in the biochemical tank to cool the muddy water mixed liquid in the first-stage nitrification tank (2).
5. An improved two-stage AO biochemical processing system according to claim 1, wherein: and a jet flow stirrer is arranged in the denitrification tank (1) to ensure that the mixed liquid in the denitrification tank is in a good mixing state.
6. An improved two-stage AO biochemical processing system according to claim 1, wherein: and a sludge pump is arranged in the buffer tank (5) to make the sludge flow back to the first-stage denitrification tank (1) or be discharged to a sludge system.
7. An improved two-stage AO biochemical processing system according to claim 1, wherein: and reflux pumps are arranged in the primary nitrification tank (2) and the secondary nitrification tank (4) to respectively reflux the nitrified liquid into the primary denitrification tank (1) and the secondary denitrification tank (3).
8. An improved two-stage AO biochemical processing system according to claim 1, wherein: an external ultrafiltration system (6) is externally connected to the buffer tank (5), and a bag filter is arranged in the external ultrafiltration system (6) to intercept large-particle pollutants.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210941740.XA CN115259563A (en) | 2022-08-08 | 2022-08-08 | Improved two-stage AO biochemical treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210941740.XA CN115259563A (en) | 2022-08-08 | 2022-08-08 | Improved two-stage AO biochemical treatment system |
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| Publication Number | Publication Date |
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| CN115259563A true CN115259563A (en) | 2022-11-01 |
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| CN202210941740.XA Pending CN115259563A (en) | 2022-08-08 | 2022-08-08 | Improved two-stage AO biochemical treatment system |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206814486U (en) * | 2017-06-22 | 2017-12-29 | 南京环美科技股份有限公司 | A kind of garbage leachate biological denitrification apparatus |
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- 2022-08-08 CN CN202210941740.XA patent/CN115259563A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206814486U (en) * | 2017-06-22 | 2017-12-29 | 南京环美科技股份有限公司 | A kind of garbage leachate biological denitrification apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 杨座国编著: "《膜科学技术过程与原理》", 华东理工大学出版社, pages: 257 - 258 * |
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Application publication date: 20221101 |