CN114455782A - Embedded short-cut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater - Google Patents
Embedded short-cut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater Download PDFInfo
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- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 239000002351 wastewater Substances 0.000 title claims abstract description 19
- 230000008878 coupling Effects 0.000 title claims abstract description 16
- 238000010168 coupling process Methods 0.000 title claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 40
- 238000005273 aeration Methods 0.000 claims abstract description 37
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000004062 sedimentation Methods 0.000 claims abstract description 7
- 238000009827 uniform distribution Methods 0.000 claims abstract description 5
- 239000000945 filler Substances 0.000 claims description 37
- 239000010802 sludge Substances 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 29
- 239000012767 functional filler Substances 0.000 claims description 12
- 230000005484 gravity Effects 0.000 claims description 5
- 239000000969 carrier Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 24
- 238000006243 chemical reaction Methods 0.000 abstract description 17
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 12
- 230000001546 nitrifying effect Effects 0.000 abstract description 7
- 229910021529 ammonia Inorganic materials 0.000 abstract description 6
- 229910021536 Zeolite Inorganic materials 0.000 abstract description 2
- 239000010457 zeolite Substances 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 19
- 229910052760 oxygen Inorganic materials 0.000 description 19
- 239000001301 oxygen Substances 0.000 description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 241000894006 Bacteria Species 0.000 description 12
- 230000001360 synchronised effect Effects 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 239000010865 sewage Substances 0.000 description 6
- 244000005700 microbiome Species 0.000 description 5
- 239000006228 supernatant Substances 0.000 description 5
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 241000589651 Zoogloea Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 230000009935 nitrosation Effects 0.000 description 1
- 238000007034 nitrosation reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- 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
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- 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
- C02F2209/07—Alkalinity
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
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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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
Abstract
The invention provides an embedded short-cut nitrification and denitrification coupling device for inorganic ammonia nitrogen wastewater, which mainly comprises a shell, an aeration system, a nitrification functional area, a sedimentation area, a denitrification functional area and a carbon source uniform distribution system; the nitrifying functional zone is inoculated with nitrosobacteria and a certain amount of zeolite particles are added; zeolite particles are added into the nitrification functional zone, so that the number of floras is provided, ammonia nitrogen in water can be quickly adsorbed, the ammonia nitrogen concentration in the nitrification zone is reduced, the ammonia nitrogen impact resistance of the system is enhanced, the ammonia nitrogen adsorbed by the zeolite can be released to the nitrification zone when the ammonia nitrogen concentration is reduced, the higher free ammonia concentration of the system can be maintained, short-range nitrification can be realized by controlling free ammonia, DO and pH, and the aeration rate of nitrification reaction and the amount of carbon sources required by denitrification reaction are reduced; the nitrification and denitrification processes are completed in the same space, and the nitrification and denitrification are independent and do not influence each other, and the denitrification functional area is embedded in the nitrification functional area, so that the equipment is compact and the occupied space is small.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an embedded short-cut nitrification and denitrification coupling device for inorganic ammonia nitrogen wastewater.
Background
Nitrogen is an important pollutant causing water eutrophication and environmental pollution, and the control of nitrogen and phosphorus in discharged sewage is increasingly emphasized, so that the research of a process with a high-efficiency nitrogen and phosphorus removal function is increasingly important. According to the traditional denitrification theory: the removal of ammonia nitrogen is realized by two independent processes of nitrification and denitrification, and the two processes can not occur simultaneously due to different requirements on the environment. In the existing biological denitrification process, nitrification and denitrification are respectively arranged in different reactors (spatially) as two independent stages or nitrogen removal is realized by using intermittent aerobic and anaerobic conditions (temporally), which often causes complex system, large energy consumption and inconvenient operation and management.
The synchronous nitrification and denitrification process is realized in the same treatment system, and the product of the nitrification reaction can directly become the substrate of the denitrification reaction, so that the speed of the nitrification reaction is accelerated; in addition, the alkalinity released in the denitrification reaction can partially compensate the alkali consumed in the nitrification reaction, so that the pH value in the system is relatively stable; in addition, the nitration reaction and the denitrification reaction can be carried out under the same conditions and system, thereby simplifying the difficulty of operation. Realizes synchronous nitrification and denitrification, achieves the dynamic balance of the two processes, greatly simplifies the biological denitrification process and improves the denitrification efficiency, thereby saving the investment and improving the treatment efficiency. Therefore, in recent years, intensive research on biological denitrification by simultaneous nitrification and denitrification (SND for short) has been carried out domestically and abroad.
The synchronous nitrification and denitrification technology is generally realized by adopting the following ways: 1. setting dissolved oxygen concentration gradient in the same container or space to ensure that the sewage is subjected to nitrification and denitrification in sequence under the condition of different dissolved oxygen concentrations; 2. reacting zoogloea activated sludge with dissolved oxygen concentration gradient inside with sewage; 3. specific nitrifying-denitrifying bacteria are used to ensure that the sewage can be subjected to nitrification and denitrification synchronously. However, the traditional sewage treatment activated sludge method is generally full-course nitrification-denitrification, and compared with short-course nitrification-denitrification, the method has the advantages of long reaction flow, more required carbon source and oxygen, large sludge amount and high cost; the reaction conditions of synchronous nitrification and denitrification are difficult to control accurately, and certain hysteresis exists, so that the requirements on the accuracy of an online monitoring instrument and the professional degree of an operator are high.
Patent CN110803766B discloses a synchronous nitrification and denitrification process combining nitrification functional type and denitrification functional type suspension carriers, which adopts the technical scheme that: aiming at different requirements of two types of functional microorganisms in a synchronous nitrification and denitrification process on the performance of a biofilm carrier, nitrification and denitrification functional biological fillers are respectively adopted as media for the growth of the functional microorganisms. Under the condition of low dissolved oxygen, the two carriers act synergistically to accelerate the formation of a biological membrane, optimize the functional microbial community structure in the system, improve the biological diversity of the system and further realize the effect of synchronous nitrification and denitrification. The method has the advantages that the nitrification and denitrification processes are completed in the same space, the occupied space is small, the alkalinity generated by denitrification can supplement about half of the alkalinity required by nitrification, the nitrification and denitrification functional filler provides a more suitable growth environment for microorganisms, the enrichment of nitrifying bacteria and denitrifying bacteria is facilitated, the formation of a biological membrane is accelerated together, the functional microbial community structure in the system is optimized, and the synchronous nitrification and denitrification effect is further enhanced. The method has the disadvantages that because the nitrification and the denitrification are completed in the same space, the control requirement on the dissolved oxygen is strict, the denitrification reaction caused by too high dissolved oxygen is inhibited, and the denitrification reaction caused by too low dissolved oxygen is inhibited; too high COD can cause aerobic heterotrophic bacteria and nitrifying bacteria to compete for dissolved oxygen, and too low COD denitrifying bacteria cannot obtain enough carbon source to influence denitrification. In view of this, it is necessary to find a technology that can not only realize the advantages of the synchronous nitrification and denitrification technology, but also solve the short plate problem of the technology. The invention aims to absorb the technical advantages of the traditional nitrification and denitrification and the existing synchronous nitrification and denitrification and solve the shortages of the prior art, and provides a technical process and a device which are high in efficiency, low in cost, simple and easy to operate.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an embedded short-cut nitrification and denitrification coupling device for inorganic ammonia nitrogen wastewater, so as to realize the high-efficiency removal of ammonia nitrogen and total nitrogen. The invention is solved by the following technical scheme:
an embedded short-cut nitrification and denitrification coupling device for inorganic ammonia nitrogen wastewater mainly comprises a shell, an aeration system, a nitrification functional area, a sedimentation area, a denitrification functional area and a carbon source uniform distribution system; the nitrification function area is surrounded by the shell side wall, the bottom groove, the settling tank and the denitrification function area, the nitrification function area is inoculated with nitrosobacteria, and a certain amount of zeolite particles are added.
The settling zone mainly comprises a settling tank, a diversion trench and a conical baffle; the settling tank is arranged in the nitrification functional zone, the diversion trench is arranged above the settling tank, and the diversion trench and the settling tank enclose a water inlet channel of the settling zone; the conical baffle is arranged below a sludge discharge port at the bottom of the settling tank.
The shell is mainly formed by encircling a shell side wall, a shell bottom plate and a bottom groove; the bottom groove is formed by sequentially connecting a plurality of V-shaped grooves end to end, the V-shaped grooves on two sides are directly connected with the periphery of the shell, and the V-shaped groove in the middle is connected through a transverse plate.
The aeration system mainly comprises an air inlet pipeline and a nano aeration pipe; the air inlet pipeline mainly comprises an air inlet main pipe, an air inlet adjusting valve and an air inlet branch pipe; the nano aeration pipe is connected with the air inlet branch pipes on two sides end to form a closed-loop air path, and the nano aeration pipe is installed at the lowest point of the V-shaped groove on the bottom.
The denitrification functional area mainly comprises a denitrification filler column shell, denitrification functional fillers, a filter screen, a denitrification water collecting pipe, a denitrification return pipe and a one-way valve; the denitrification function filler is arranged in the denitrification filler column shell, the filter screen is arranged at the water inlet at the top of the denitrification filler column shell, the denitrification water collecting pipe is connected to the bottom of each row of denitrification filler column shell, denitrification return pipes are arranged at the two sides of the denitrification water collecting pipe at intervals, and the denitrification return pipes are provided with one-way valves which are baffle plates hinged to the tops of the denitrification return pipes.
The carbon source uniform distribution system mainly comprises a carbon source main pipe and a carbon source branch pipe; one end of the carbon source main pipe is connected with a carbon source pump and a carbon source tank, the other end of the carbon source main pipe is connected with each carbon source branch pipe, and the carbon source branch pipes are connected to each denitrification filler column.
Furthermore, the bottom groove is formed by connecting a plurality of V-shaped grooves, the angle of each V-shaped groove is 30-60 degrees, and the V-shaped grooves can be designed and selected according to the actual situation. The angle of the V-shaped groove can meet the requirement that the sludge can slide down along the wall plate of the V-shaped groove under the condition of self gravity.
Furthermore, the nano aeration pipe of the aeration system is arranged at the lowest point of the V-shaped groove at the bottom, the air coming out of the nano aeration pipe flushes the sludge deposited in the groove at the bottom, the nano aeration pipe provides dissolved oxygen and plays a role of pneumatic stirring, the sludge mixed liquid in the whole nitrification functional area is in a completely mixed state, all nitrosation bacteria can quickly contact pollutant substrates, the sludge load is reduced, and the biochemical treatment efficiency and the impact resistance are improved.
Furthermore, a certain amount of zeolite particles are added into the nitrification functional zone, the particle size of the zeolite particles is 40-200 meshes, and the volume of the zeolite particles accounts for 10-30% of the volume of the nitrification functional zone; the zeolite particles are used as carriers of nitrosobacteria, and the nitrosobacteria are attached to and grow on the zeolite particles.
Furthermore, a plurality of holes are formed in the settling tank and the diversion trench, and the denitrification filler column penetrates through the settling tank and the openings in the diversion trench to be communicated with the denitrification water collecting pipe at the bottom.
Furthermore, a water inlet channel enclosed by the settling tank and the diversion trench extends to the middle part of the settling tank, and the inlet water of the settling tank flows through the middle part of the settling tank and then flows upwards to enter the denitrification filler column.
Furthermore, the top end of the denitrification filler column is slightly lower than the top end of the settling tank, so that the mixed liquid in the nitrification functional zone passes through the water inlet channel of the settling tank due to aeration lifting, and finally overflows and flows into the denitrification filler column.
Furthermore, the denitrification filler column is filled with denitrification functional filler, the denitrification functional filler accounts for 40-60% of the volume of the denitrification filler column, and filter screens are arranged at the inlet end of the denitrification filler column and the outlet end of the denitrification water collecting pipe, so that the denitrification functional filler does not flow away with water flow.
Furthermore, the denitrification functional filler filled in the denitrification filler column can flow in a certain range, and can have a certain hydraulic self-stirring effect on the water inlet of the denitrification filler column.
Furthermore, two sides of the denitrification water collecting pipe are connected with denitrification return pipes at intervals, each denitrification return pipe is provided with a one-way valve, and the control of the denitrification treatment water flow only can flow into the nitrification function area and can not flow backwards.
Furthermore, one end of the denitrification water collecting pipe is communicated with the water outlet pipeline through a connecting joint, and the downstream of the water outlet pipeline is provided with a water outlet regulating valve; the water outlet pipe is connected with one end of each denitrification water collecting pipe, which is provided with a filter screen, and a valve is arranged at the outlet of the water outlet pipe and used for controlling the water outlet flow.
Furthermore, under the action of aeration, the density of the mixed liquid is reduced due to the small bubbles carried by the mixed liquid, upward buoyancy is generated, so that the nitrification functional region is lifted and overflows to the settling tank, the mixed liquid is further consumed by dissolved oxygen and precipitated air in the settling tank, the density of the mixed liquid is increased, the top end of the denitrification filler column is lower than that of the settling tank, the supernatant of the mixed liquid overflows from the settling tank to enter the denitrification filler column after natural sedimentation, and the water treated by the denitrification functional region can flow back to the nitrification functional region through the denitrification return pipe because the density of the supernatant is higher than that of the mixed liquid in the nitrification functional region and the nitrification functional region generates a negative pressure region due to aeration.
Furthermore, after the mixed liquid in the nitrification function zone enters the settling tank, the volume and the mass of sludge flocs are increased and the settling rate is higher due to the fact that zeolite particles are added into the mixed liquid.
Furthermore, each denitrification functional zone is provided with a corresponding carbon source supply branch pipe.
Compared with the traditional nitrification and denitrification and synchronous nitrification and denitrification treatment methods, the method has the following characteristics and advantages:
1. the invention finishes the nitrification and denitrification processes in the same space, and the nitrification and denitrification are independent and do not influence each other, the denitrification functional area is embedded in the nitrification functional area, the equipment is compact, and the occupied space is small.
2. Zeolite particles are added into a nitrification functional zone, so that the nitrification functional zone can be used as an attachment growth place for nitrifying bacteria and provide the number of floras; secondly, the ammonia nitrogen in the water can be quickly adsorbed, the ammonia nitrogen concentration in the nitrification area is reduced, and the ammonia nitrogen impact resistance of the system is enhanced; thirdly, when the ammonia nitrogen concentration in the nitrification region is reduced, the ammonia nitrogen adsorbed by the zeolite is released to the nitrification region, the higher free ammonia concentration of the system can be kept, the short-cut nitrification can be realized by controlling the free ammonia, DO and pH, and the aeration rate of the nitrification reaction and the amount of the carbon source required by the denitrification reaction are reduced.
3. The dissolved oxygen in the nitrification functional zone is controlled to be 0.3-0.7 mg/L, the pH is controlled to be about 8, the free ammonia is controlled to be above 0.6mg/L, the oxygen supply amount is saved by 25% in the nitrification stage, the organic carbon source is saved by 40% in the denitrification stage, the alkali feeding amount is saved, the volume of the reactor is reduced by 30-40%, and the sludge yield is reduced by about 50%.
4. The settling tank can realize the settling separation of the sludge, can be used as a secondary aerobic zone to further consume dissolved oxygen, and creates a better anoxic environment for denitrification.
5. According to the invention, a carbon source is directly added into the denitrification area, so that an adequate carbon source can be provided for the denitrification process, and the total nitrogen removal rate is improved; compared with the method of directly adding the carbon source to the water inlet, the method can avoid the competition of heterotrophic bacteria and nitrifying bacteria for dissolved oxygen, provide a better growth environment for the nitrifying bacteria, save the carbon source and strengthen the nitrification reaction.
6. The denitrification functional area is provided with a denitrification return pipe, so that denitrification effluent is returned to the nitrification area, about half of alkalinity required by nitrification reaction is supplemented, and the alkalinity added in the nitrification process is reduced.
7. The sludge settled and separated by the settling tank of the invention completely flows back to the middle part of the nitrification region, the middle part of the nitrification region always keeps higher sludge concentration, and the inlet water firstly enters the middle part of the nitrification region, so the invention has the effects of diluting the inlet water load and improving the impact resistance of the inlet water load.
8. The nano aeration pipe of the aeration system is arranged at the lowest point of the V-shaped groove at the bottom, the air from the nano aeration pipe flushes the sludge deposited in the groove at the bottom, the air also plays a role of pneumatic stirring while providing dissolved oxygen, the sludge mixed liquid in the whole nitrification function area is in a completely mixed state, all nitrosobacteria can quickly contact with pollutant substrates, the sludge load is reduced, and the biochemical treatment efficiency and the impact resistance are improved.
9. According to the invention, under the action of aeration, the density of the mixed liquid is reduced due to the small bubbles carried by the mixed liquid, and upward buoyancy is generated, so that the nitrification functional region is lifted and overflows to the settling tank, the mixed liquid is further consumed by dissolved oxygen and separated air in the settling tank, the density of the mixed liquid is increased, as the top end of the denitrification filler column is lower than that of the settling tank, the supernatant after natural settling of the mixed liquid overflows from the settling tank to enter the denitrification filler column, and as the density of the supernatant is higher than that of the mixed liquid in the nitrification functional region and the nitrification functional region generates a negative pressure region due to aeration, the water treated by the denitrification functional region can flow back to the nitrification functional region through the denitrification return pipe.
10. The bottom of the nitrification area adopts a groove type design, the nano aeration pipe positioned at the lowest point of the groove at the bottom can fully stir the settled sludge, the sludge is not easy to settle at the bottom, the sludge is in a completely mixed state, influent water pollutants can be captured by microorganisms in time, the sludge volume load is higher, and the dissolved oxygen is easier to control.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a front view of an embedded short-cut nitrification-coupled denitrification device for inorganic ammonia nitrogen wastewater;
FIG. 2 is a top view of an embedded type short-cut nitrification and denitrification device for inorganic ammonia nitrogen wastewater;
FIG. 3 is a schematic view showing the arrangement of carbon source supply lines;
FIG. 4 is a schematic diagram of a denitrification function zone;
in the figure: 1. a device housing; 2. a bottom trench; 3. a nano aeration pipe; 4. an air intake conduit system; 5. a water inlet pipeline; 6. a settling tank; 7. a carbon source adding system; 8. a denitrification functional zone; 9. a diversion trench; 10. a nitrification functional zone 11, a shell side wall 1; 12. a housing side wall 2; 41. an intake valve; 42. an intake branch pipe 1; 43. an intake branch pipe 2; 71. a carbon source main tube; 72. a carbon source branch pipe 1; 721. a carbon source branch pipe 2; 81. a denitrification packed column; 811: filtering with a screen; 812: a denitrification packed column housing; 813: a denitrification functional filler; 82: a denitrification water collecting pipe; 821: a denitrification return pipe; 822: a one-way valve; 83. connecting a joint; 84. a water outlet pipeline; 85. and a water outlet regulating valve.
Detailed Description
As shown in figure 1, inorganic ammonia nitrogen wastewater is sent to a sludge backflow position of a settling tank (6) in a nitrification functional zone (10) of an embedded short-cut nitrification and denitrification coupling device through a water inlet pipeline (5), a nano aeration pipe (3) is installed at the lowest point of a bottom groove (2), an air inlet pipeline system (4) is divided into an air inlet branch pipe 1(42) and an air inlet branch pipe 2(43) after entering a device shell (1) and is respectively connected with two ends of the nano aeration pipe (3), under the aeration action of the nano aeration pipe (3), the inlet water is fully mixed with nitrification liquid in the nitrification functional zone (10), so that part of ammonia nitrogen in the inlet water is adsorbed by zeolite particles and temporarily stored, the other part of ammonia nitrogen is oxidized into nitrite nitrogen under the action of nitrosobacteria, and the adsorbed ammonia nitrogen is gradually released into the nitrification liquid along with the oxidation of the ammonia nitrogen in the nitrification liquid into nitrite nitrogen, the concentration of free ammonia in the nitrifying liquid is always kept at a higher level and is oxidized into nitrite nitrogen under the action of nitrosobacteria. The density of the nitrified liquid is reduced due to the mixing of micro bubbles from the nano aeration pipe (3) and the nitrified liquid, buoyancy is generated, the liquid level of sludge mixed liquid in the nitrified functional zone (10) is lifted, the mixed liquid enters the middle part of the sedimentation tank through a water inlet channel surrounded by the sedimentation tank (6) and the diversion trench (9), and then flows upwards, in the upward flowing process, the specific gravity is higher due to the fact that the sludge carries zeolite particles, the mixed liquid is gradually settled to the bottom of the sedimentation tank (6) under the self gravity, and finally flows back to the nitrified functional zone (10) under the self gravity of the sludge through a sludge return pipe at the bottom, a conical baffle is arranged at the outlet of the sludge return pipe, and the sludge mixed liquid lifted under the aeration action is prevented from backflushing the sludge return pipe; meanwhile, the residual dissolved oxygen of the sludge mixed liquor is further consumed by microorganisms in the settling tank, the supernatant containing nitrite continuously flows upwards and enters a denitrification functional area (8) from the upper part of a denitrification filler column (81) through a filter screen (811), a carbon source is added into the denitrification filler column (81) through a carbon source adding system (7), denitrifying bacteria attached to and grown on a denitrification functional filler (813) directly reduce nitrite nitrogen into nitrogen on the premise that the carbon source serves as an electron donor, the denitrification filler columns (81) are arranged in an array manner, each row of denitrification filler columns (81) are communicated through a denitrification water collecting pipe (82), denitrification return pipes (821) are arranged on two sides of the denitrification water collecting pipe (82) at intervals, each denitrification return pipe (821) is provided with a one-way valve, and the sludge mixed liquor in the nitrification functional area (10) generates buoyancy under the action of the nano aeration pipe (3), partial negative pressure is formed, so that pressure difference is formed between the inside and the outside of the one-way valve by the water treated by the denitrification functional area (8), the water can only flow from the denitrification water collecting pipe (82) to the nitrification functional area (10) and can not flow back, and the alkalinity generated by denitrification reaction can supplement the alkalinity required by nitrification in time. One end of the denitrification water collecting pipe (82) is communicated with the water outlet pipeline (84) through a connecting joint (83), and the downstream of the water outlet pipeline (84) is provided with a water outlet regulating valve (85) which can dynamically regulate the water outlet quantity according to the total nitrogen of the outlet water so as to realize the stable standard reaching of the outlet water.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (10)
1. The utility model provides an embedded short distance of inorganic ammonia nitrogen waste water is nitrified and is coupled denitrification facility which characterized in that: mainly comprises a shell, an aeration system, a nitrification functional zone, a sedimentation zone, a denitrification functional zone and a carbon source uniform distribution system; the nitrification function area is surrounded by the shell side wall, the bottom groove, the settling tank and the denitrification function area, the nitrification function area is inoculated with nitrosobacteria, and a certain amount of zeolite particles are added.
2. The embedded shortcut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater according to claim 1, characterized in that: the settling zone mainly comprises a settling tank, a diversion trench and a conical baffle; the settling tank is arranged in the nitrification functional zone, the diversion trench is arranged above the settling tank, and the diversion trench and the settling tank enclose a water inlet channel of the settling zone; the conical baffle is arranged below a sludge discharge port at the bottom of the settling tank.
3. The embedded shortcut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater according to claim 1, characterized in that: the shell is mainly formed by encircling a shell side wall, a shell bottom plate and a bottom groove; the bottom groove is formed by sequentially connecting a plurality of V-shaped grooves end to end, the V-shaped grooves on two sides are directly connected with the periphery of the shell, and the V-shaped groove in the middle is connected through a transverse plate; the bottom groove is formed by connecting a plurality of V-shaped grooves, the angle of each V-shaped groove is 30-60 degrees, and the angle of each V-shaped groove slides downwards along a wall plate of each V-shaped groove under the condition of self gravity; and a nano aeration pipe of the aeration system is arranged at the lowest point of the V-shaped groove at the bottom.
4. The embedded shortcut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater according to claim 1, characterized in that: the aeration system mainly comprises an air inlet pipeline and a nano aeration pipe; the air inlet pipeline mainly comprises an air inlet main pipe, an air inlet adjusting valve and an air inlet branch pipe; the nano aeration pipe is connected with the air inlet branch pipes on two sides end to form a closed-loop air path, and the nano aeration pipe is installed at the lowest point of the V-shaped groove on the bottom.
5. The embedded shortcut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater according to claim 1, characterized in that: the denitrification functional zone mainly comprises a denitrification filler column shell, denitrification functional fillers, a filter screen, a denitrification water collecting pipe, a denitrification return pipe and a one-way valve; the denitrification functional filler is arranged in the denitrification filler column shell, the filter screen is arranged at the water inlet at the top of the denitrification filler column shell, the denitrification water collecting pipe is connected to the bottom of each row of denitrification filler column shell, denitrification return pipes are arranged at two sides of each row of denitrification filler column shell at intervals, and each denitrification return pipe is provided with a one-way valve which is a baffle hinged to the top of the denitrification return pipe; the carbon source uniform distribution system mainly comprises a carbon source main pipe and a carbon source branch pipe; one end of the carbon source main pipe is connected with a carbon source pump and a carbon source tank, the other end of the carbon source main pipe is connected with each carbon source branch pipe, and the carbon source branch pipes are connected to each denitrification filler column.
6. The embedded shortcut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater according to claim 1, characterized in that: a certain amount of zeolite particles are added into the nitrification functional zone, the particle size of the zeolite particles is 40-200 meshes, and the volume of the zeolite particles accounts for 10-30% of the volume of the nitrification functional zone; the zeolite particles are used as carriers of nitrosobacteria, and the nitrosobacteria are attached to and grow on the zeolite particles.
7. The embedded shortcut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater according to claim 2, characterized in that: the settling tank and the flow guide groove are provided with a plurality of holes, and the denitrification filler column passes through the openings on the settling tank and the flow guide groove and is communicated with the denitrification water collecting pipe at the bottom; a water inlet channel formed by the surrounding of the settling tank and the diversion trench extends to the middle part of the settling tank, and the inlet water of the settling tank flows through the middle part of the settling tank and then flows upwards to enter the denitrification filler column; the top end of the denitrification filler column is slightly lower than the top end of the settling tank, so that the mixed liquid in the nitrification functional zone passes through the water inlet channel of the settling tank due to aeration lifting, and finally overflows and flows into the denitrification filler column; the denitrification filler column is filled with denitrification functional filler, the denitrification functional filler accounts for 40-60% of the volume of the denitrification filler column, and filter screens are arranged at the inlet end of the denitrification filler column and the outlet end of the denitrification water collecting pipe.
8. The embedded shortcut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater according to claim 5, characterized in that: two sides of the denitrification water collecting pipe are connected with denitrification return pipes at intervals, and each denitrification return pipe is provided with a one-way valve; one end of the denitrification water collecting pipe is communicated with the water outlet pipeline through a connecting joint, and the downstream of the water outlet pipeline is provided with a water outlet regulating valve.
9. The embedded shortcut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater according to claim 8, characterized in that: the water outlet pipe is connected with one end of each denitrification water collecting pipe, which is provided with a filter screen, and a valve is arranged at the outlet of the water outlet pipe.
10. The embedded shortcut nitrification coupling denitrification device for inorganic ammonia nitrogen wastewater according to claim 5, characterized in that: each denitrification functional zone is provided with a corresponding carbon source supply branch pipe.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117430247A (en) * | 2023-12-06 | 2024-01-23 | 青岛鑫源环保集团有限公司 | Drinking water nitrogen-reducing purifying equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2863781Y (en) * | 2005-12-30 | 2007-01-31 | 江苏一环集团有限公司 | High-concentration ammonia nitrogen waste water treatment apparatus |
| CN102765856A (en) * | 2012-07-18 | 2012-11-07 | 中国矿业大学 | Short-range nitrification-denitrification dephosphorization and denitrogenation method for reinforced low-carbon/phosphorus-ratio sewage |
| CN108946940A (en) * | 2018-06-21 | 2018-12-07 | 南京大学 | A kind of integrated apparatus and its operation method handling low ratio of carbon to ammonium waste water |
| CN108996689A (en) * | 2018-09-10 | 2018-12-14 | 哈尔滨工业大学 | A kind of micro- aerator of solid carbon source and its wastewater treatment method improving coal chemical industry low ratio of carbon to ammonium waste water nitrogen removal rate |
| AU2021100860A4 (en) * | 2021-02-11 | 2021-04-29 | Jiangsu Vocational Institute Of Architectural Technology | A type of device for realizing short-cut nitrification by using UCT process |
-
2022
- 2022-03-01 CN CN202210194509.9A patent/CN114455782A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2863781Y (en) * | 2005-12-30 | 2007-01-31 | 江苏一环集团有限公司 | High-concentration ammonia nitrogen waste water treatment apparatus |
| CN102765856A (en) * | 2012-07-18 | 2012-11-07 | 中国矿业大学 | Short-range nitrification-denitrification dephosphorization and denitrogenation method for reinforced low-carbon/phosphorus-ratio sewage |
| CN108946940A (en) * | 2018-06-21 | 2018-12-07 | 南京大学 | A kind of integrated apparatus and its operation method handling low ratio of carbon to ammonium waste water |
| CN108996689A (en) * | 2018-09-10 | 2018-12-14 | 哈尔滨工业大学 | A kind of micro- aerator of solid carbon source and its wastewater treatment method improving coal chemical industry low ratio of carbon to ammonium waste water nitrogen removal rate |
| AU2021100860A4 (en) * | 2021-02-11 | 2021-04-29 | Jiangsu Vocational Institute Of Architectural Technology | A type of device for realizing short-cut nitrification by using UCT process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117430247A (en) * | 2023-12-06 | 2024-01-23 | 青岛鑫源环保集团有限公司 | Drinking water nitrogen-reducing purifying equipment |
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