CN114409056A - A/SBR + EM-based muddy water treatment method - Google Patents
A/SBR + EM-based muddy water treatment method Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 45
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 33
- 241000894006 Bacteria Species 0.000 claims description 22
- 239000010802 sludge Substances 0.000 claims description 14
- 239000003513 alkali Substances 0.000 claims description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 5
- IPQVRLSXWJPESU-UHFFFAOYSA-N [N].ON=O Chemical compound [N].ON=O IPQVRLSXWJPESU-UHFFFAOYSA-N 0.000 claims description 3
- VGPSUIRIPDYGFV-UHFFFAOYSA-N [N].O[N+]([O-])=O Chemical compound [N].O[N+]([O-])=O VGPSUIRIPDYGFV-UHFFFAOYSA-N 0.000 claims description 3
- 230000001546 nitrifying effect Effects 0.000 claims description 2
- 238000006396 nitration reaction Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 3
- 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 abstract 1
- 238000010992 reflux Methods 0.000 abstract 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- 230000008901 benefit Effects 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 238000005273 aeration Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- -1 ammonium ions Chemical class 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000002897 organic nitrogen compounds Chemical group 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 239000002351 wastewater Substances 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/006—Regulation methods for biological treatment
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
-
- 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
- C02F2101/166—Nitrites
-
- 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
- C02F2301/04—Flow arrangements
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Health & Medical Sciences (AREA)
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a muddy water treatment method based on A/SBR + EM, which comprises the steps of carrying out short nitration reaction, conventional nitration reaction and reflux denitrification reaction on muddy water, and finally reducing nitrate nitrogen and nitrite nitrogen into nitrogen. Especially has obvious effect on removing total nitrogen and high ammonia nitrogen.
Description
Technical Field
The invention relates to the field of sludge water treatment, in particular to a sludge water treatment method based on A/SBR + EM.
Background
The AO process, namely an anoxic aerobic process (aeroxicoxic), is an improved sewage treatment process adopting an activated sludge process, and sometimes is combined by adopting a biofilm process with a filler, for example: the contact oxidation process can degrade organic matters and has certain dephosphorization and denitrification effects; for example, patent publication No. CN109019861A entitled A/O method for treating wastewater has low denitrification efficiency, and to improve the denitrification efficiency, the internal circulation ratio must be increased, thereby increasing the operation cost, and from the outside, the internal circulation liquid comes from the aeration tank and contains a certain DO, so that the A section is difficult to maintain an ideal anoxic state, the denitrification effect is influenced, and the denitrification rate is difficult to reach 90%.
The SBR sequencing batch activated sludge process, also called intermittent activated sludge process, is characterized in that sewage enters each reaction process in a reaction tank in sequence and intermittently, namely five processes of inflow, reaction, precipitation, discharge and idling; the SBR working process is that sewage is added into a reactor in a short time, aeration is started after the reactor is filled with water, the aeration is stopped after organic matters in the sewage meet the requirement of troubleshooting through biodegradation, and supernatant is discharged after a certain time of precipitation, for example, the patent with the publication number of CN105800777A and the name of the patent is an energy-saving sewage treatment system based on the SBR process; however, the SBR process generally has intermittent periodic operation, high requirements on automatic control, and the defects of variable water level operation, increased power consumption, low nitrogen and phosphorus removal efficiency, poor sludge stability as good as anaerobic nitrification and the like.
Disclosure of Invention
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a muddy water treatment method based on A/SBR + EM comprises the following steps:
(1) setting a preposed anoxic tank A and an SBR tank, controlling the SBR tank to be an aerobic tank firstly through time control and then to be an anoxic tank, setting a water inlet pipe in the tank A, connecting the water inlet pipe with the SBR tank through a drain pipe or a wall hole, and connecting the SBR tank with the tank A through a return pipe when the SBR tank is used as the aerobic tank;
(2) the muddy water in the tank A firstly enters the SBR tank through a drain pipe or a wall hole, at the moment, shortcut nitrification bacteria are added into the SBR tank at one time, the water in the SBR tank is subjected to shortcut nitrification reaction under aerobic conditions, wherein ammonia nitrogen firstly converts ammonia into nitrite nitrogen under the action of the shortcut nitrification bacteria;
(3) the sludge-water mixed liquid in the aerobic SBR tank flows back to the tank A through the return pipe and is mixed with the sludge and water in the tank A;
(4) the water fed into the tank A and the mixed liquid refluxed during the aerobic process of the later-stage SBR are subjected to denitrification reaction together, and simultaneously, the water enters the SBR anoxic denitrification reaction after the aerobic nitrification reaction in the SBR tank is finished;
(5) denitrifying bacteria are added into the preposed anoxic A pool and the SBR pool at one time, and the nitric acid nitrogen and the nitrous acid nitrogen are reduced into nitrogen under the action of the denitrifying bacteria.
Preferably, the SBR tank is provided with an alkali adding system for adjusting the pH value.
Preferably, the sludge water refluxed to the tank A when the SBR is aerobic is 2-3 times of the inlet water of the tank A.
Preferably, the shortcut nitrifying bacteria are EM bacteria, and EM is a general name of dominant bacteria.
After the scheme is adopted, the invention has the following advantages: (1) the process shortens the treatment process through short-cut nitrification, reduces the tank volume, and can reduce the investment by 20-30%;
(2) the process has the functional advantage of removing the total nitrogen, the total nitrogen can be removed by more than 95 percent, the latest national total nitrogen requirement index can be reached, and the traditional process can only remove 40 to 70 percent at most;
(3) the conventional process consumes oxygen in the nitration process, but the short-cut nitration process saves the digestion process from nitrite to nitrate, so that O225 percent can be saved; and the short-cut nitrification and denitrification mainly generate the dissimilation reaction, and the sludge is produced by 50 percent less; because the short-cut nitration saves oxygen, alkali and methanol, the treatment cost can be reduced 1/3.
(4) The process has front and back denitrification, the denitrification rate can reach over 95 percent, and the denitrification generates inorganic alkali which provides about 35 to 40 percent of alkali for nitrification, so that the alkali can be saved by 30 to 40 percent.
(5) The invention has strong high ammonia nitrogen impact resistance, even if the ammonia nitrogen of the incoming water exceeds 500mg/l, the load of the A/SBR for treating the ammonia nitrogen is not changed, the effluent is always qualified, and only the water quantity is reduced.
The invention combines the continuous water inlet and the preposed denitrification of the A/O process, the discontinuous water outlet and the postpositional denitrification of the SBR process and the EM short-cut nitrification and denitrification motivity bacteria, can reduce the operation intensity and the operation cost, simultaneously ensures that the water is discharged after being qualified, and is a practical muddy water treatment technology.
Drawings
FIG. 1 is a schematic diagram of each reaction tank in the A/SBR + EM-based sludge water treatment method.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Examples
The embodiment discloses a muddy water treatment method based on A/SBR + EM, which comprises the following steps:
(1) setting a preposed anoxic tank A and an SBR tank, controlling the SBR tank to be an aerobic tank firstly through time control and then to be an anoxic tank, setting a water inlet pipe in the tank A, connecting the water inlet pipe with the SBR tank through a drain pipe or a wall hole, and connecting the SBR tank with the tank A through a return pipe when the SBR tank is used as the aerobic tank;
(2) the muddy water in the tank A firstly enters the SBR tank through a drain pipe or a wall hole, at the moment, shortcut nitrification bacteria are added into the SBR tank at one time, the water in the SBR tank is subjected to shortcut nitrification reaction under aerobic conditions, wherein ammonia nitrogen firstly converts ammonia into nitrite nitrogen under the action of the shortcut nitrification bacteria;
the short-cut nitration reaction formula is as follows:
meanwhile, because a large amount of H + is generated by the short-cut nitration reaction, the biochemical bacteria are extremely sensitive to the pH change, so that an alkali adding system is arranged for regulating the pH value when the SBR is aerobic so as to ensure that the nitration reaction is smoothly carried out;
during the conventional nitration reaction, the ammonium ions change as follows:
in the shortcut nitration reaction, the ammonium radical example was varied as follows:
(3) the sludge-water mixed liquid in the aerobic SBR tank flows back to the tank A through the return pipe and is mixed with the sludge water in the tank A, and the sludge water flowing back to the tank A in the aerobic SBR tank is 2-3 times of the inlet water of the tank A;
(4) the water fed into the tank A and the mixed liquid refluxed by the SBR aerobic tank at the later stage are subjected to denitrification reaction together, and simultaneously, the water enters the SBR anoxic denitrification reaction after the SBR aerobic digestion reaction is finished;
(5) denitrifying bacteria are added into the preposed anoxic A pool and the SBR pool at one time, and the nitric acid nitrogen and the nitrous acid nitrogen are reduced into nitrogen under the action of the denitrifying bacteria.
The denitrifying bacteria belong to heterotrophic facultative anaerobes. Under anoxic conditions, with NO2-N is an electron acceptor and organic carbon is a carbon source; under such conditions, less cellular material is synthesized accordingly; under the metabolic activity of denitrifying bacteria, NO2N has two transformation pathways, namely: assimilating and denitrifying (synthesizing), wherein the final product is an organic nitrogen compound and becomes a component of the thallus; dissimilatory denitrification (decomposition) and the final product is gaseous nitrogen, the latter generally being the main.
The denitrification reaction formula is as follows:
first, comparison of the Processes
The A/SBR process is a new short-cut nitrification and denitrification ammonia removal process developed by integrating the advantages of the A/O and the SBR, the continuous water inlet and the pre-denitrification of the A/O are selected, the operation intensity and the operation cost are reduced, the discontinuous water outlet and the post-denitrification of the SBR are selected, the water is discharged after being qualified, and the EM short-cut nitrification and denitrification motivating bacteria are added, so that the process is the most practical technology for treating the ammonia-containing sewage at present no matter the water quality is treated or the operation cost is reduced. Comparing the A/SBR process of the invention with the traditional A/O process and SBR process, the result is as follows:
for economic benefit, theoretical alkali addition amount calculation (calculated by 1KG ammonia nitrogen): 1000g ammonia nitrogen 1KG, 14 ammonia nitrogen molecular weight, 71.4mol 1000/14 ammonia nitrogen molecular weight, 106 sodium carbonate molecular weight, 71.4X (106/2) x 2 theoretical alkali addition 7568g 7.57KG
Denitrification can generate alkalinity, denitrification is carried out before and after the A/SBR, the denitrification rate reaches over 95 percent, denitrification can provide 40-50 percent of alkalinity for nitrification, the alkali consumption can be saved by 35-40 percent, and the alkali consumption is about 3.5-4 KG for treating 1KG ammonia nitrogen.
The dosage of denitrifying methanol: the short-cut nitrification and denitrification process has the advantages that the methanol consumption of 1 oxygen is reduced from HNO2 compared with HNO3, 2KG methanol is required for short-cut nitrification, and 3KG methanol is required for conventional nitrification.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A muddy water treatment method based on A/SBR + EM is characterized by comprising the following steps:
(1) setting a preposed anoxic tank A and an SBR tank, controlling the SBR tank to be an aerobic tank firstly through time control and then to be an anoxic tank, setting a water inlet pipe in the tank A, connecting the water inlet pipe with the SBR tank through a drain pipe or a wall hole, and connecting the SBR tank with the tank A through a return pipe when the SBR tank is used as the aerobic tank;
(2) the muddy water in the tank A firstly enters the SBR tank through a drain pipe or a wall hole, at the moment, shortcut nitrification bacteria are added into the SBR tank at one time, the water in the SBR tank is subjected to shortcut nitrification reaction under aerobic conditions, wherein ammonia nitrogen firstly converts ammonia into nitrite nitrogen under the action of the shortcut nitrification bacteria;
(3) the sludge-water mixed liquid in the aerobic SBR tank flows back to the tank A through the return pipe and is mixed with the sludge and water in the tank A;
(4) the water fed into the tank A and the mixed liquid refluxed during the aerobic process of the later-stage SBR are subjected to denitrification reaction together, and simultaneously, the water enters the SBR anoxic denitrification reaction after the aerobic nitrification reaction in the SBR tank is finished;
(5) denitrifying bacteria are added into the preposed anoxic A pool and the SBR pool at one time, and the nitric acid nitrogen and the nitrous acid nitrogen are reduced into nitrogen under the action of the denitrifying bacteria.
2. The A/SBR + EM based mud water treatment method of claim 1, wherein the SBR tank is provided with an alkali adding system for adjusting the pH value.
3. The method for treating A/SBR + EM-based muddy water as claimed in claim 1, wherein the muddy water returned to the tank A when the SBR is aerobic is 2-3 times of the influent water of the tank A.
4. The A/SBR + EM-based sludge water treatment method as claimed in claim 1, wherein the shortcut nitrifying bacteria are EM bacteria.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423296A (en) * | 2008-11-21 | 2009-05-06 | 北京工业大学 | Hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification method and apparatus |
| CN101628772A (en) * | 2009-07-24 | 2010-01-20 | 北京工业大学 | Short distance denitrifying dephosphatation double-sludge technique taking granular sludge as medium and device thereof |
| CN101863590A (en) * | 2010-06-17 | 2010-10-20 | 同济大学 | Combined anoxic/aerobic enhanced biological activated carbon dynamic membrane nitrogen and phosphorus removal process |
| CN203159405U (en) * | 2013-04-02 | 2013-08-28 | 上海泓济环保工程有限公司 | Coupled biological denitrification system |
-
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- 2021-12-20 CN CN202111565478.5A patent/CN114409056A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423296A (en) * | 2008-11-21 | 2009-05-06 | 北京工业大学 | Hypoxic/anaerobic UASB-SBR landfill leachate shortcut biological denitrification method and apparatus |
| CN101628772A (en) * | 2009-07-24 | 2010-01-20 | 北京工业大学 | Short distance denitrifying dephosphatation double-sludge technique taking granular sludge as medium and device thereof |
| CN101863590A (en) * | 2010-06-17 | 2010-10-20 | 同济大学 | Combined anoxic/aerobic enhanced biological activated carbon dynamic membrane nitrogen and phosphorus removal process |
| CN203159405U (en) * | 2013-04-02 | 2013-08-28 | 上海泓济环保工程有限公司 | Coupled biological denitrification system |
Non-Patent Citations (1)
| Title |
|---|
| 刘建伟等: "污水生物处理新技术", 中国建材工业出版社, pages: 173 - 174 * |
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