CN211734093U - High-efficiency ammonia nitrogen removal system based on side stream shortcut nitrification-anaerobic ammonia oxidation process - Google Patents
High-efficiency ammonia nitrogen removal system based on side stream shortcut nitrification-anaerobic ammonia oxidation process Download PDFInfo
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Abstract
The utility model relates to an ammonia nitrogen high-efficiency removal system based on a side flow shortcut nitrification-anaerobic ammonia oxidation process, which comprises an ammonia nitrogen adsorption unit, a heating regeneration unit and a regenerated liquid denitrification module; the ammonia nitrogen adsorption unit comprises an ammonia nitrogen adsorption column (1) filled with adsorption materials; the heating regeneration unit comprises a regeneration liquid storage box (2) and a regeneration liquid inlet pump (9) which are sequentially connected, the regeneration liquid storage box (2) is connected with a regeneration liquid inlet of the ammonia nitrogen adsorption column (1) through the regeneration liquid inlet pump (9), the regeneration liquid is heated in the regeneration liquid storage box (2) through a sewage source heat pump (20), and the regeneration liquid storage box (2) is also connected with the ammonia nitrogen adsorption unit and recovers the regeneration liquid flowing out of the ammonia nitrogen adsorption column (1); the regenerated liquid denitrification module is connected with a regenerated liquid storage box (2) of the heating regeneration unit. Compared with the prior art, the utility model has the advantages of with low costs, effectual.
Description
Technical Field
The utility model belongs to the technical field of environmental protection and sewage treatment, be a high-efficient system of getting rid of ammonia nitrogen based on sidestream short-cut nitrification-anaerobic ammonia oxidation technology particularly.
Background
In recent years, with the development of industrialization, the pollution problem caused by ammonia nitrogen wastewater is becoming more serious. Ammonia nitrogen is one of important factors for destroying water body balance and causing water body eutrophication, and excessive discharge of the ammonia nitrogen can cause great harm to ecological environment and human bodies, not only can promote water body eutrophication, but also can generate stink to cause water supply obstacle. The ammonia nitrogen in the sewage is mainly discharged from waste water and garbage percolate in the industries of chemical fertilizer, leather making, breeding, petrochemical industry, meat processing and the like, and is discharged from municipal sewage and agricultural irrigation. During thirteen five periods, China puts higher requirements on the discharge of ammonia nitrogen, and how to economically and efficiently remove the ammonia nitrogen in sewage becomes a research focus. The prior art for removing ammonia nitrogen is characterized in that: biological denitrification, ammonia stripping, breakpoint chlorination, chemical precipitation and ion exchange. The biological denitrification method is most applied at home, but the conventional process needs aeration facilities and carbon sources are added, so that the operation cost is high and the occupied area is large; the ammonia stripping method has simple process flow, but needs to solve the problems of ammonia collection and outlet formed by stripping, and scale is easy to generate in the operation process to influence the operation; the denitrification efficiency of the breakpoint chlorination method is high, the method is suitable for advanced treatment of wastewater, but the byproduct chloramine can cause secondary pollution; the chemical precipitation method is suitable for ammonia nitrogen wastewater with various concentrations, but a cheap and efficient precipitator is not found for application for the time; the ion exchange method has the advantages of investment saving, simple process and the like, but the regeneration cost is higher, and the regeneration liquid is still high-concentration ammonia nitrogen wastewater and needs to be further treated.
Compared with the traditional nitrification/denitrification process, the ANAMMOX process can reduce the addition of an organic carbon source by 100 percent, reduce the aeration rate by 60 percent and reduce the sludge production by 90 percent, thereby having wide application prospect. However, in view of the current research progress, the amammox process is difficult to be applied to mainstream sewage treatment, and the difficulties are mainly as follows: (1) the optimum temperature for the growth of the ANAMMOX bacteria is 30-35 ℃, but the requirement of the ANAMMOX bacteria on the temperature is difficult to meet by a large amount of municipal sewage. (2) The ammonia nitrogen concentration in the municipal wastewater is about 30mg/L, and the activity of ANAMMOX bacteria can be seriously influenced due to lower ammonia nitrogen concentration. (3) A plurality of impurity ions and toxic substances exist in main stream sewage, and the direct introduction of the impurity ions and the toxic substances can inhibit the activity of ANAMMOX bacteria. (4) ANAMMOX is prone to residual NO in mainstream sewage treatment3 --N and NO2 -And N, the effluent quality exceeds the standard. Therefore, if a process route which can meet the survival conditions of the ANAMMOX bacteria and realize the efficient and stable removal of ammonia nitrogen can be found, the method is undoubtedly an economic and efficient technical route. At present, no technical report in the aspect exists at home and abroad.
Chinese patent CN107804890A discloses a processing system and method for improving long-term adsorption performance of ammonia nitrogen adsorption materials, the processing system include ammonia nitrogen adsorption unit and regeneration unit, ammonia nitrogen adsorption unit includes sewage intake pump, inlet valve, the ammonia nitrogen adsorption column and the blow-down valve group that are equipped with adsorption material that connect gradually, regeneration unit including the regeneration liquid storage tank and the regeneration liquid intake pump that connect gradually, regeneration liquid storage tank in be equipped with the regeneration liquid, the outlet pipeline of regeneration liquid intake pump connect oxidant and advance the medicine ware, oxidant advance the medicine ware in be equipped with the oxidant. The invention adopts the oxidant-containing regeneration liquid during operation, the regeneration treatment cost is high, meanwhile, the oxidant adopted by the invention can react with ammonia nitrogen to generate other products, the concentration of the oxidant in the regeneration liquid is continuously reduced, the regeneration efficiency is gradually reduced, and the regeneration liquid is changed into high-concentration ammonia nitrogen wastewater after being used, is difficult to reuse and can not meet the discharge standard, and further treatment is still needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a method for efficiently removing ammonia nitrogen based on a sidestream shortcut nitrification-anaerobic ammonia oxidation process. The technology for efficiently removing ammonia nitrogen can solve the problem that the application of the ANAMMOX process is restricted due to the fact that proper temperature is difficult to provide for mainstream sewage treatment, the concentration of ammonia nitrogen in inlet water is low, impurity ions and toxic substances exist, the removal efficiency is unstable and the like. Meanwhile, the problems that the regeneration cost of the ammonia nitrogen adsorbing material is high and the regeneration liquid can not be recycled in the prior art can be solved.
Based on present ANAMMOX technology because technological condition restriction is difficult to realize the application in mainstream sewage, the problem that ammonia nitrogen adsorption material regeneration cost is higher and the high concentration ammonia nitrogen in the regeneration liquid needs further treatment, the utility model provides a technical route is got rid of to high efficiency of ammonia nitrogen based on sidestream short-cut nitrification-anaerobic ammonia oxidation technology. The utility model discloses apply sectional type short cut nitrification-anaerobic ammonia oxidation (SHARON-ANAMMOX), partial nitrosation-anaerobic ammonia oxidation (PN-ANAMMOX) and whole autotrophic denitrogenation (CANON) technology to the side stream sewage treatment, the ammonia nitrogen adsorption regeneration technology is connected to the front end. Meanwhile, a sewage source heat pump is added in the ammonia nitrogen adsorption regeneration process, and the temperature of the regeneration liquid is controlled by utilizing the heat energy in the urban primary sewage, so that the regeneration efficiency and the regeneration speed are improved. Compare with current ammonia nitrogen adsorption regeneration technology and mainstream ANAMMOX technology, the utility model has the advantages of the adsorption material regeneration cost is low, the ANAMMOX system operation is stable, play water quality of water is stable up to standard. The sewage source heat pump is used as a low-level heat source, so that the whole treatment process is more energy-saving and environment-friendly. Simultaneously the utility model discloses can also realize regenerating liquid and handle the retrieval and utilization, low area has apparent economic benefits and actual engineering meaning.
The purpose of the utility model can be realized through the following technical scheme:
an ammonia nitrogen high-efficiency removal system based on a sidestream shortcut nitrification-anaerobic ammonia oxidation process is characterized by comprising an ammonia nitrogen adsorption unit, a heating regeneration unit and a regenerated liquid denitrification module;
the ammonia nitrogen adsorption unit comprises a sewage inlet pump, an inlet valve, an ammonia nitrogen adsorption column filled with adsorption materials and an emptying valve group which are connected in sequence; the adsorption material is selected from one or more of natural zeolite, modified zeolite, molecular sieve and fly ash; the Hydraulic Retention Time (HRT) of the sewage in the ammonia nitrogen adsorption unit is 1-120 min;
the heating regeneration unit comprises a regeneration liquid storage box and a regeneration liquid inlet pump which are sequentially connected, the regeneration liquid storage box is connected with a regeneration liquid inlet of the ammonia nitrogen adsorption column through the regeneration liquid inlet pump, regeneration liquid is filled in the regeneration liquid storage box, the regeneration liquid is heated in the regeneration liquid storage box through a sewage source heat pump, the regeneration liquid storage box is connected with a precipitator, calcium removal precipitator is filled in the precipitator, and the regeneration liquid storage box is also connected with the ammonia nitrogen adsorption unit and recovers the regeneration liquid flowing out of the ammonia nitrogen adsorption column;
the regeneration liquid is sodium salt, potassium salt, calcium salt solution or mixed solution, and the concentration is 0.01-100 g/L. The inlet water of the sewage source heat pump is reclaimed water or secondary outlet water treated by a sewage treatment plant. The heating temperature of the regeneration liquid is 25-50 ℃;
the regeneration time of the regeneration liquid to the ammonia nitrogen adsorption material is 0.5-72 h.
The reaction principle of the utility model is as follows:
ammonia nitrogen adsorption unit: the solid ammonia nitrogen adsorption material removes ammonia nitrogen in sewage through an ion exchange mechanism, so that the effluent meets the requirements of relevant national standards, and the reaction is shown in formula (1).
Wherein A is+Is the surface exchangeable ions of the ammonia nitrogen adsorbing material Z-Is in a structure of an adsorbing material.
A temperature-raising regeneration unit: the temperature-rising regeneration unit utilizes metal cations in the regeneration liquid to adsorb NH on the surface of the ammonia nitrogen adsorption material4 +And exchanging the ammonia nitrogen adsorption material into the solution to realize the regeneration of the ammonia nitrogen adsorption material, and heating the regenerated solution by using a sewage source heat pump to improve the regeneration rate. The regeneration reaction is shown in formula (2).
Wherein, B+Is the metal cation in the regenerating liquid. The reaction is endothermic, and the heating of the regeneration liquid is beneficial to the desorption of the ammonia nitrogen adsorption material, thereby realizing rapid and efficient regeneration.
Along with the increase of the regeneration times of the ammonia nitrogen adsorption unit, the desorbed ammonia nitrogen can be greatly enriched in the regeneration liquid, and after a certain regeneration times is reached, the regeneration efficiency is reduced due to the overhigh ammonia nitrogen concentration in the regeneration liquid, so that the ammonia nitrogen adsorption unit is difficult to continue to use. In the conventional biological treatment, ammonia nitrogen is converted into nitrate nitrogen, and then denitrification is performed by adding a carbon source, but the method increases the treatment cost and the occupied area.
To the demand of getting rid of the high concentration ammonia nitrogen in the regeneration liquid, the utility model discloses the regeneration liquid denitrogenation module that plans is short-cut nitrification-anaerobic ammonium oxidation denitrogenation unit and handles promptly. The shortcut nitrification-anaerobic ammonia oxidation denitrification unit is connected with a regenerated liquid storage box of the heating regeneration unit.
The regeneration liquid denitrification module can adopt two-section type or one-section type. The two-stage process can adopt partial nitrosation-anaerobic ammonia oxidation (PN-ANAMMOX) and shortcut nitrification-anaerobic ammonia oxidation (SHARON-ANAMMOX) processes. In one stage, a completely autotrophic nitrogen removal (CANON) process can be used. The purpose of the front-stage sewage source heat pump for heating the regeneration liquid is to control the water temperature to be about 35 ℃ so as to provide the optimal growth temperature for the functional microorganisms of the shortcut nitrification-anaerobic ammonia oxidation denitrification process while efficiently desorbing and regenerating. The specific reaction principle of each unit is as follows.
Part of nitrous oxidesChemical (PN) unit: partial nitrosation is to use nitrosation bacteria to convert 55-60% of NH4 +Conversion to NO2 -So that the effluent meets the requirement of the proportion of the substrate of the water inlet of the ANAMMOX reactor, namely NO2 -:NH4 +1.32. The reaction is shown in formula (3).
Short-cut nitrification (SHARON) unit: partial regeneration liquid is shunted to realize partial regeneration liquid short-cut nitration reaction, so that the water inlet of the ANAMMOX denitrification unit meets the substrate proportion (NH)4 +:NO2 -1: 1.32). The short-cut nitration reaction is shown in formula (4).
ANAMMOX denitrification unit: the removal of ammonia nitrogen in the regeneration liquid is the key for the continuous implementation of the adsorption-regeneration cycle. ANAMMOX denitrification unit utilizes ANAMMOX bacteria under anoxic conditions with NO2 -NH as an electron acceptor4 +Conversion to N2. The ANAMMOX process is shown in formula (5).
CANON denitrification unit: the CANON process comprises performing partial nitrification and anaerobic ammonia oxidation reaction in the same reactor, and performing low DO content treatment by Ammonia Oxidizing Bacteria (AOB) and ANAMMOX bacteria with AOB of O2NH as an electron acceptor4 +Oxidation of-N to NO2 -NO produced by the bacterium ANAMMOX with AOB2 -N is an electron acceptor, with the remainder NH4 +-N reaction to N2Thus achieving the purpose of denitrification. The CANON process is shown in formula (6).
Part of the alkalinity is consumed in the processes of partial nitrosation and short-cut nitrification, and NH in the regeneration liquid to be treated4 +The presence of (b) lowers the pH of the solution, as shown in formula (7).
Aiming at the problem of pH reduction of the regeneration liquid to be treated, the optimum range of the pH value entering the ANAMMOX denitrification unit is maintained by adopting a mode of adding alkalinity, the alkalinity is realized by adding a pH buffering agent, and the reaction formulas (8), (9) and (10) are as follows:
OH-+H+→H2O (10)
the shortcut nitrification-anaerobic ammonia oxidation denitrification unit is a two-stage denitrification unit or a one-stage denitrification unit, wherein the two-stage denitrification unit comprises a partial nitrosation-anaerobic ammonia oxidation unit and a shortcut nitrification-anaerobic ammonia oxidation unit; the one-stage denitrification unit is a completely autotrophic denitrification unit.
The two-stage denitrification unit comprises: a partial nitrosation-anaerobic ammonia oxidation unit formed by combining a partial nitrosation unit and an anaerobic ammonia oxidation unit, or a partial nitrification-anaerobic ammonia oxidation unit formed by combining a partial nitrification unit and an anaerobic ammonia oxidation unit;
wherein the content of the first and second substances,
the partial nitrosation unit comprises a partial nitrosation reactor, the partial nitrosation reactor is connected with a regenerated liquid storage tank through a pipeline, a water inlet pump and a first pH regulator are arranged on the connecting pipeline, and the partial nitrosation reactor is connected with an aeration pump;
the short-cut nitrification unit comprises a short-cut nitrification reactor, the short-cut nitrification reactor is connected with a regenerated liquid storage tank through a pipeline, a water inlet pump and a first pH regulator are arranged on a connecting pipeline of the short-cut nitrification reactor and the regenerated liquid storage tank, the short-cut nitrification reactor is connected with an aeration pump, a water outlet of the short-cut nitrification reactor is connected with the regenerated liquid storage tank through a return pipe, and a drainage pump is arranged on the return pipe;
the anaerobic ammonia oxidation unit comprises an ANAMMOX reactor, an ANAMMOX water inlet pipeline is arranged at the inlet of the ANAMMOX reactor, a regenerated liquid circulating pipeline is arranged at the outlet of the ANAMMOX reactor, and a second pH regulator is arranged on the ANAMMOX water inlet pipeline; when the partial nitrosation unit is combined, the ANAMMOX water inlet pipeline is connected with the partial nitrosation reactor; when the ANAMMOX water inlet pipeline is combined with the shortcut nitrification unit, the ANAMMOX water inlet pipeline is connected with the shortcut nitrification reactor; and the regeneration liquid circulating pipeline is connected with a regeneration liquid storage tank.
The whole autotrophic nitrogen removal unit comprises a CANON reactor, wherein the inlet of the CANON reactor is connected with a regenerated liquid storage box through a pipeline, a water inlet pump and a first pH regulator are arranged on the connecting pipeline of the CANON reactor and the CANON reactor, and the outlet of the CANON reactor is connected with the regenerated liquid storage box through a regenerated liquid circulating pipe; the CANON reactor is also connected with an aeration pump.
And multiple groups of ammonia nitrogen adsorption units are connected in parallel and share one heating regeneration unit.
The regenerated liquid denitrification schemes adopting the three different regenerated liquid denitrification modules are respectively and specifically described as follows:
the first regenerated liquid denitrification scheme: partial nitrosation-anammox unit
The denitrification scheme of the regenerated liquid adopts a PN-ANAMMOX process. The partial nitrosation unit comprises a partial nitrosation water inlet pump, a partial nitrosation water inlet valve, a partial nitrosation reactor and an emptying valve group which are sequentially connected, wherein the partial nitrosation water inlet pump is connected with a pipeline between a regeneration liquid storage tank and the partial nitrosation reactor, the partial nitrosation reactor is filled with nitrified sludge, the partial nitrosation reactor is connected with an aeration pump, a water inlet pipeline of the partial nitrosation reactor is connected with a first pH regulator, and a pH buffer is filled in the first pH regulator. ANAMMOX denitrogenation unit including the inlet valve, ANAMMOX reactor and the unloading valve group that connect gradually, unloading valve group including unloading valve and regeneration liquid return valve, regeneration liquid return valve connect the regeneration liquid storage box, ANAMMOX inlet tube on connect the second pH regulator, the second pH regulator in be equipped with the pH buffer.
Further, the inoculated sludge in the partial nitrosation reactor is one or two of short-cut nitrification sludge or sludge at the front end of the aerobic tank.
Further, part of the feed water NH of the nitrosation reactor4 +The concentration of-N is 50-2000 mg/L.
Further, the HRT of the regeneration liquid to be treated in the partial nitrosation reactor is 2-48 h.
Further, the SRT of the partial nitrosation reactor is 5-200 d.
Further, DO of the partial nitrosation reactor is controlled at 0.2-3.0 mg/L.
Further, the pH in the partial nitrosation reactor is controlled between 6.5 and 8.5.
Further, the temperature in the partial nitrosation reactor is controlled at 25-40 ℃.
Further, the inoculated sludge in the ANAMMOX reactor is one or two of ANAMMOX granular sludge and ANAMMOX packing with a film.
Further, the HRT of the regeneration liquid to be treated in the ANAMMOX reactor is 2-72 h.
Further, feed water NH of the ANAMMOX reactor4 +The concentration of-N is 50-2000 mg/L.
Further, the pH buffering agent in the first and second pH regulators is one or more selected from carbonate, bicarbonate, sodium hydroxide and lime.
The second regeneration liquid denitrification scheme comprises the following steps: short-cut nitrification-anaerobic ammonia oxidation unit
The denitrification scheme of the regenerated liquid adopts a SHARON-ANAMMOX process. The short-cut nitrification unit nitrify the intake pump, short-cut nitrification intake valve, short-cut nitrification reactor and the unloading valve group including the short-cut that connect gradually, the short-cut nitrification intake pump connect the pipeline between regeneration liquid reserve tank and the short-cut nitrification reactor, the short-cut nitrification reactor fill in and nitrify mud, the short-cut nitrification reactor still connect the aeration pump, the short-cut nitrification unit still be equipped with the drainage pump, the pipeline between regeneration liquid reserve tank and the ANAMMOX reactor is connected to the drainage pump, short-cut nitrification reactor advance water piping connection first pH regulator on the pipeline, first pH regulator in be equipped with the pH buffer. ANAMMOX denitrogenation unit including the inlet valve, ANAMMOX reactor and the unloading valve group that connect gradually, ANAMMOX reactor in be filled with anaerobic granular sludge, the unloading valve group including unloading valve and regeneration liquid return valve, regeneration liquid return valve connect the regeneration liquid storage tank, ANAMMOX inlet tube on the road connect the second pH regulator, the second pH regulator in be equipped with the pH buffer.
Further, the inoculated sludge in the short-cut nitrification reactor is one or two of short-cut nitrification sludge or sludge at the front end of the aerobic tank.
Further, water inlet NH of the short-cut nitrification reactor4 +The concentration of-N is 50-2000 mg/L.
Furthermore, the drainage flow of the drainage pump of the short-cut nitrification unit is 25-75% of the regeneration liquid to be treated.
Further, the HRT of the regeneration liquid to be treated in the short-cut nitrification reactor is 2-48 h.
Further, the SRT of the short-cut nitrification reactor is 1-200 d.
Further, DO in the short-cut nitrification reactor is controlled to be 0.3-3.0 mg/L.
Further, the pH value in the short distance nitration reactor is controlled between 6.5 and 8.5.
Further, the temperature in the short-cut nitrification reactor is controlled at 25-40 ℃.
Further, the inoculated sludge in the ANAMMOX reactor is one or two of ANAMMOX granular sludge and ANAMMOX packing with a film.
Further, the HRT of the regeneration liquid to be treated in the ANAMMOX reactor is 2-72 h.
Further, feed water N of the ANAMMOX reactorH4 +The concentration of-N is 50-2000 mg/L.
Further, the pH buffering agent in the first and second pH regulators is one or more selected from carbonate, bicarbonate, sodium hydroxide and lime.
The third regeneration liquid denitrification scheme: completely autotrophic nitrogen removal unit
The denitrification scheme of the regenerated liquid adopts a CANON process. CANON denitrogenation unit including CANON intake pump, CANON inlet valve, CANON reactor and the unloading valve group that connects gradually, CANON intake pump connect the pipeline between regeneration liquid storage box and the CANON reactor, unloading valve group including unloading valve and regeneration liquid backward flow valve, regeneration liquid backward flow valve connect regeneration liquid storage box, CANON advances the water piping connection second pH regulator, second pH regulator in be equipped with the pH buffer.
Further, feed water NH of CANON reactor4 +The concentration of-N is 50-2000 mg/L.
Further, the HRT of the regeneration liquid to be treated in the CANON reactor is 3-72 h.
Further, DO in the CANON reactor was controlled at 0.2-3.0 mg/L.
Further, the pH in the CANON reactor was controlled at 6.5-8.5.
Further, the temperature in the CANON reactor was maintained in the range of 25-40 ℃.
Further, the inoculated sludge in the CANNON reactor is one or two of ANAMMOX granular sludge and ANAMMOX packing with a film.
Further, the pH buffer in the second pH regulator is one or more of carbonate, bicarbonate, sodium hydroxide and lime.
The method for efficiently removing ammonia nitrogen by adopting the system is characterized by comprising the following steps:
1) and continuously pumping the sewage containing ammonia nitrogen to be treated into the ammonia nitrogen adsorption unit by a sewage inlet pump, and discharging the sewage through an outlet of the ammonia nitrogen adsorption unit until the effluent of the ammonia nitrogen adsorption unit reaches a set concentration (meets a set value of a relevant discharge standard), and stopping the operation of the sewage inlet pump.
2) Starting a regeneration liquid inlet pump, pumping the regeneration liquid heated by the sewage source heat pump into the ammonia nitrogen adsorption unit from the regeneration liquid storage tank, fully soaking the ammonia nitrogen adsorption material for regeneration treatment, and refluxing the regeneration liquid into the regeneration liquid storage tank to complete an adsorption regeneration cycle.
3) In the first regenerated liquid denitrification scheme, regenerated liquid containing high-concentration ammonia nitrogen is pumped into a partial nitrosation reactor through a partial nitrosation water inlet pump, and is pumped into an ANAMMOX reactor through an ANAMMOX denitrification water inlet pump after the reaction in the partial nitrosation reactor is finished.
4) In the second regeneration liquid denitrification scheme, regeneration liquid containing high-concentration ammonia nitrogen is pumped into a shortcut nitrification reactor through a shortcut nitrification water inlet pump, meanwhile, a drainage pump drains part of regeneration liquid to be treated, and the regeneration liquid mixed with the regeneration liquid after completing shortcut nitrification is pumped into an ANAMMOX reactor.
5) In the third regeneration liquid denitrification scheme, regeneration liquid containing high-concentration ammonia nitrogen is directly pumped into a CANON reactor through a CANON water inlet pump.
6) In the first regenerated liquid denitrification scheme and the second regenerated liquid denitrification scheme, a pH buffer is firstly added into a partial nitrosation and short-cut nitrification reactor through a first pH regulator, then added into the regenerated liquid after partial nitrosation and short-cut nitrification treatment through a second pH regulator, and simultaneously pumped into an ANAMMOX reactor through an ANAMMOX denitrification water inlet pump to complete denitrification in the ANAMMOX reactor, and the treated regenerated liquid is discharged to a regenerated liquid storage tank through a drainage valve for recycling; in the third regeneration liquid denitrification scheme, a pH buffering agent is directly added into the regeneration liquid to be treated, the regeneration liquid is simultaneously pumped into a CANON reactor through a CANON water inlet pump, the whole autotrophic denitrification is carried out in the CANON reactor, and the treated regeneration liquid is discharged to a regeneration liquid storage box for recycling through a drainage valve.
7) The ammonia nitrogen adsorption units can be connected in parallel and share one heating regeneration unit.
The utility model discloses based on short-cut nitrification-anammox technology, through carrying out denitrogenation to high concentration regeneration liquid to realized ammonia nitrogen adsorption-regeneration-short-cut nitrification-anammox technological process's complete denitrogenation. Ammonia nitrogen in the sewage is adsorbed and removed through an ammonia nitrogen adsorption unit, and the concentration of the ammonia nitrogen in the effluent can reach GB18918-2002 national class-A emission standard or even more strict class-IV number standard. During regeneration, the regeneration liquid is heated by the sewage source heat pump, so that on one hand, the temperature is increased to accelerate the regeneration rate, and the regeneration effect is obviously improved; on the other hand, the regenerated liquid is heated to provide proper reaction temperature for short-cut nitrification, partial nitrosation, ANAMMOX denitrification and CANON denitrification units. The partial nitrification and nitrosation unit converts part of high-concentration ammonia nitrogen in the regeneration liquid to be treated into nitrosnitrogen, and provides proper substrate concentration for the inlet water of the ANAMMOX denitrification unit. The pH buffer is added into the inlet water of the partial nitrosation, partial nitrification, ANAMMOX denitrification and CANON denitrification units to realize the stability of the pH of the inlet water, and the outlet water of the ANAMMOX denitrification and CANON denitrification units is the regenerated liquid after ammonia nitrogen is removed and can directly flow into a regenerated liquid storage box to recycle the regenerated liquid. When the interfering ions in the regeneration liquid reach a certain concentration, the precipitating agent is added to convert the interfering ions into precipitates and carry out solid-liquid separation, so that the aim of removing the interfering ions is fulfilled.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses can be used to the ammonia nitrogen and the total nitrogen of town sewage, industrial waste water, initial stage rainwater and black smelly water body to get rid of. Compared with the prior art, the utility model has the advantages of it is following:
(1) through the design of the process unit for rapid adsorption-activation regeneration of ammonia nitrogen, the aim of rapidly removing ammonia nitrogen and total nitrogen under low floor space and short HRT is fulfilled, and the concentrations of ammonia nitrogen and total nitrogen in effluent and polluted water of a sewage treatment system can be effectively controlled;
(2) the ANAMMOX process is applied to the removal of ammonia nitrogen in the side flow of the regenerated liquid, so that the problem of high cost of the original processes such as air stripping, sodium hypochlorite oxidation, nitrification regeneration-denitrification with an external carbon source and the like is solved;
(3) the overall process design of ammonia nitrogen adsorption-regeneration-shortcut nitrification-anaerobic ammonia oxidation has obvious innovation, not only can realize ammonia nitrogen enrichment by using an adsorption-regeneration unit and avoid the problem that the ammonia nitrogen concentration of an ANAMMOX process applied to a main flow system is too low, but also can avoid the inhibition effect of toxic substances in sewage on ANAMMOX bacteria, and can also avoid the problem that the total nitrogen of effluent exceeds the standard (50-70mg/L) caused by the residual nitrate or nitrite after the reaction of the ANAMMOX system, and the residual nitrate or nitrite can be continuously utilized in subsequent circulation.
(4) The temperature rise regeneration is organically coupled with the optimum temperature environment of AOB and ANAMMOX bacteria. The utility model discloses utilize the sewage source to promote regeneration liquid temperature, both helped improving the regeneration efficiency of ammonia nitrogen adsorption material for regeneration rate provides favorable environmental condition for AOB and ANAMMOX fungus's growth proliferation again, has effectively reduced the sewage treatment energy consumption when improving technology operating efficiency.
(5) The proper salinity concentration is beneficial to improving the ammonia nitrogen regeneration efficiency, has the promotion effect on AOB and ANAMMOX bacteria and improves the denitrification performance.
(6) By adding alkalinity, the proper pH range of partial nitrosation, partial nitrification, ANAMMOX denitrification and CANON denitrification elements is maintained. ANAMMOX bacteria with CO2Can be used as carbon source, and can provide CO for ANAMMOX bacteria while adjusting pH by adding alkalinity2The treatment efficiency of the ANAMMOX denitrification unit and the CANON denitrification unit is improved.
Drawings
FIG. 1 is a schematic flow diagram of a first ammonia nitrogen efficient removal technology based on a shortcut nitrification-anaerobic ammonia oxidation process;
FIG. 2 is a schematic flow diagram of a second ammonia nitrogen high-efficiency removal technology based on a shortcut nitrification-anaerobic ammonia oxidation process;
FIG. 3 is a schematic flow chart of a third ammonia nitrogen high-efficiency removal technology based on a partial nitrification-anaerobic ammonia oxidation process;
FIG. 4 is a diagram showing the water quality in and out of the system during the pilot plant test in example 2;
FIG. 5 is a diagram showing the water quality of partial nitrosation water entering and exiting a partial nitrosation reactor during a pilot plant of example 2;
FIG. 6 is a graph of water quality in and out of the ANAMMOX reactor during a pilot plant run in example 2;
FIG. 7 is a schematic of the CANON reactor packing during pilot plant runs.
The labels in the figure are as follows:
ammonia nitrogen adsorption column 1, regeneration liquid storage tank 2, partial nitrosation reactor 3, short-cut nitrification reactor 3 ', CANON reactor 3 ", ANAMMOX reactor 4, precipitant doser 5, first pH regulator 6, second pH regulator 7, sewage intake pump 8, regeneration liquid intake pump 9, partial nitrosation intake pump 10, short-cut nitrification intake pump 10', CANON intake pump 10", intake valve 11, regeneration liquid intake valve 12, partial nitrosation intake valve 13, short-cut nitrification intake valve 13 ', CANON intake valve 13 ", ANAMMOX denitrification intake valve 14, ammonia nitrogen adsorption column drainage valve 15, ANAMMOX reactor drainage valve 16, CANON reactor drainage valve 16', regeneration liquid reflux valve 17, vent valve 18, exhaust valve 19, sewage source heat pump 20, aeration pump 21, and drainage pump 22.
The line segments in the figure are identified as follows:
Detailed Description
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the embodiments or the prior art descriptions, and obviously, the embodiments in the following description are only some embodiments of the present invention, and other solutions can be obtained according to the embodiments without inventive labor for those skilled in the art. The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
A flow chart of the system for efficiently removing ammonia nitrogen based on a shortcut nitrification-anaerobic ammonia oxidation process is shown in figure 1 and comprises an ammonia nitrogen adsorption unit, a heating regeneration unit, a partial nitrosation unit and an ANAMMOX denitrification unit. The ammonia nitrogen adsorption unit comprises a sewage inlet pump 8, a water inlet valve 11, an ammonia nitrogen adsorption column 1 filled with adsorption materials and an ammonia nitrogen adsorption column drainage valve 15 which are sequentially connected.
The heating regeneration unit comprises a regeneration liquid storage box 2, the regeneration liquid storage box 2 is connected with an ammonia nitrogen adsorption column 1 through a pipeline, a regeneration liquid inlet pump 9 and a regeneration liquid inlet valve 12 are sequentially arranged on a connecting pipeline between the regeneration liquid storage box 2 and the ammonia nitrogen adsorption column, regeneration liquid is filled in the regeneration liquid storage box 2, the regeneration liquid storage box 2 is further connected with a sewage source heat pump 20 and a precipitator 5, the regeneration liquid storage box 2 is connected with the ammonia nitrogen adsorption column 1 and recovers regeneration liquid flowing out of the ammonia nitrogen adsorption column 1, a regeneration liquid backflow valve 17 and an emptying valve 18 are further arranged between the regeneration liquid storage box 2 and the ammonia nitrogen adsorption column 1, and the regeneration liquid is 10g/L sodium chloride solution.
The partial nitrosation unit comprises a partial nitrosation water inlet pump 10, a water inlet valve 13 and a partial nitrosation reactor 3 which are sequentially connected, wherein the partial nitrosation water inlet pump 10 is connected with a pipeline between the regeneration liquid storage tank 2 and the partial nitrosation water inlet valve 13, a first pH regulator 6 is further arranged on the pipeline, meanwhile, the partial nitrosation reactor 3 is further connected with an aeration pump 21, and the partial nitrosation reactor 3 is internally inoculated with nitrified sludge.
ANAMMOX denitrogenation unit is including the second pH regulator 7, ANAMMOX inlet valve 14, ANAMMOX reactor 4, the ANAMMOX reactor drain valve 16 that connect gradually, ANAMMOX reactor 4 in the planting mud be anaerobic granular sludge, be connected through regeneration liquid circulation pipeline between ANAMMOX reactor 4 and the regeneration liquid storage tank 2 to set up ANAMMOX reactor drain valve 16 on this regeneration liquid circulation pipeline, the retrieval and utilization regeneration liquid, the produced gas of ANAMMOX reactor 4 passes through exhaust valve 19 and discharges. A pH buffer selected from at least one of sodium carbonate or sodium bicarbonate is added to the effluent of the partial nitrosation reactor 3 via a second pH adjuster 7.
The method comprises the following specific steps: the ammonia nitrogen sewage to be treated is pumped into the ammonia nitrogen adsorption column 1 through the water inlet valve 11 by the sewage inlet pump 8, the ammonia nitrogen in the sewage is fully adsorbed by the adsorbing material in the ammonia nitrogen adsorption column 1, after the preset operation time is reached, the sewage inlet pump 8 is closed, the ammonia nitrogen adsorption column drainage valve 15 and the emptying valve 18 are opened, and the ammonia nitrogen adsorption column 1 is regenerated after all the treated water is discharged. During regeneration, open regeneration liquid return valve 17, close drainage valve 15 and blow-down valve 18, regeneration liquid is after the heating of sewage source heat pump 20, squeeze into ammonia nitrogen adsorption column 1 with regeneration liquid from storage tank 2 via regeneration liquid inlet valve 12 by regeneration liquid intake pump 9, get back to regeneration liquid storage tank 2 through regeneration liquid return valve 17 after regeneration liquid is full of ammonia nitrogen adsorption column 1, form the circulation regeneration processing system, close regeneration liquid inlet pump 9 and regeneration liquid inlet valve 12 after the regeneration is finished, let regeneration liquid flow back to in regeneration liquid storage tank 2 completely, accomplish the regeneration. Pumping the high-concentration ammonia nitrogen sewage to be treated for adsorption after the regeneration is finished, adding a precipitator into the regenerated liquid storage tank 2 through a precipitator feeder 5 after the regeneration is carried out for 4-10 times, stirring, settling after full reaction, and finally discharging the precipitate through a mud bucket. The treated regeneration liquid is pumped into a partial nitrosation reactor 3 through a partial nitrosation water inlet valve 13 by a partial nitrosation water inlet pump 10, and the flow rate of the first pH regulator 6 is regulated simultaneously. The regeneration liquid to be treated which finishes part of nitrosation reaction is pumped into the ANAMMOX reactor 4 by an ANAMMOX denitrification water inlet pump through an ANAMMOX water inlet valve 14, an ANAMMOX drainage valve 16 is opened, meanwhile, the flow rate of the second pH regulator 7 is regulated, the regeneration liquid to be treated is mixed with the regeneration liquid to be treated in proportion and enters the reactor, the treated regeneration liquid flows back to the regeneration liquid storage box 2 to form a circulating treatment system, the recycling of the regeneration liquid is finished, and the gas generated by the ANAMMOX reactor 4 is discharged through an exhaust valve 19.
Example 2
Aiming at the sewage with the ammonia nitrogen concentration of 25mg/L in a certain sewage treatment plant, the sewage is required to meet the requirement of GB18918-2002 first-grade A standard (5mg/L) after being treated. Pilot test research is carried out by adopting the system, and the water treatment amount of the pilot test is 2.2 tons/day.
Sewage enters the ammonia nitrogen adsorption column 1 through a sewage inlet pump 8 through a water inlet valve 11, the volume of the ammonia nitrogen adsorption column 1 is 1L, and natural zeolite is filled in the ammonia nitrogen adsorption column. The hydraulic retention time is 5min, the adsorption operation time is 4h, the disposable water volume in one operation is 48L, the disposable water volume per hour is 12L/h, the disposable water volume per day is 264L/d (calculated according to 22 h), 8 groups of ammonia nitrogen adsorption columns are adopted to operate in parallel, and 2 groups of ammonia nitrogen adsorption columns are used for standby. And after the preset running time is reached, the sewage inlet pump 8 is closed, the drainage valve 15 and the emptying valve 18 are opened, and all the treated water is discharged for regeneration. During regeneration, ammonia nitrogen is closedThe adsorption column comprises an adsorption column drain valve 15 and an emptying valve 18, wherein after the regenerated liquid is heated by a sewage source heat pump 20, 8 groups of ammonia nitrogen adsorption units which run in parallel are driven into a regenerated liquid storage box 2 from a regenerated liquid inlet pump 9 through a regenerated liquid inlet valve 12, and the volume of the regenerated liquid is 100L. And when the adsorption material is submerged by the regeneration liquid, the regeneration liquid inlet pump 9 and the regeneration liquid inlet valve 12 are closed, so that the adsorption material is fully soaked in the regeneration liquid. After regeneration is completed, a regeneration liquid backflow valve 17 is opened, regeneration liquid flows back to the regeneration liquid storage box 2, regeneration is completed, the ammonia nitrogen adsorption stage is entered again after regeneration is completed, the regeneration liquid is purified after 4 times of regeneration, and sodium carbonate solution is added through a precipitator 5. NH in the purified regeneration liquid4 +The N concentration is 418mg/L, the regeneration liquid to be treated enters a partial nitrosation reactor 3 through a partial nitrosation water inlet valve 13 by a partial nitrosation water inlet pump 10, and simultaneously sodium bicarbonate solution is added by adjusting a first pH adjuster 6. The volume of the partial nitrosation reactor 3 is 150L, and the operation condition of the partial nitrosation reactor 3 is as follows: HRT 12h, SRT 15d, DO 1mg/L, temperature 32 ℃. Partial nitrosation reactor effluent NH4 +-N concentration 189.4mg/L, NO2 -NH at an-N concentration of 227.2mg/L4 +-N/NO2 --N ═ 1: 1.2. the regeneration liquid after partial nitrosation treatment enters the ANAMMOX reactor 4 through an ANAMMOX denitrification water inlet valve 14, and simultaneously sodium bicarbonate solution is added through adjusting a second regulator 7. The volume of the ANAMMOX reactor 4 is 50L, anaerobic granular sludge is filled in the ANAMMOX reactor, the hydraulic retention time is 8h, and the temperature is controlled at 32 ℃. After the regeneration liquid to be treated enters the reactor, a drainage valve 16 and an exhaust valve 19 of the ANAMMOX reactor are opened, the treated regeneration liquid flows back to a regeneration liquid storage tank 2 for recycling through the drainage valve 16 of the ANAMMOX reactor, and gas generated in the ANAMMOX reaction process is exhausted through the gas valve 19. The water quality of inlet and outlet water and the denitrification condition of regenerated liquid during pilot plant test are shown in attached figures 4-6, and it can be seen that the concentration of the ammonia nitrogen in the outlet water of the ammonia nitrogen adsorption column 1 is always lower than 5mg/L, the requirement of GB18918-2002 first-grade A standard (5mg/L) is met, and simultaneously NH in the outlet water of the ANAMMOX reactor 44 +N concentration 9.33mg/L, NO2 -N concentration 1.89mg/L, NO3 -N concentration 31.38mg/L, NH4 +N load of 0.56kg/m3/d，NO2 -N load of 0.67kg/m3And d, the denitrification effect of the regenerated liquid is obvious.
Compared with the patent CN107804890A, the utility model discloses use short distance nitration-anaerobic ammonium oxidation technology at the sidestream, solved the ammonia nitrogen in the regeneration liquid and can't get rid of, the regeneration liquid is difficult to reuse's problem, the regeneration method low cost that adopts simultaneously, the cost can be saved 56.8%, economic benefits is showing. With the tradition A2Compared with the O process, the process can save 100 percent of carbon source and 61.2 percent of aeration amount, the occupied area is reduced by 42.3 percent, the sludge yield is low, meanwhile, the process heats the regeneration liquid in situ by the sewage source heat pump, fully utilizes the heat energy in the sewage, realizes the reutilization of energy, and reduces CO2Has obvious economic and environmental benefits.
Example 3
Aiming at the tail water of a certain sewage treatment plant with the ammonia nitrogen concentration of 15mg/L, the tail water reaches the requirement of GB18918-2002 first-grade A standard (5mg/L) after being treated. A lateral flow SHARON-ANAMMOX system is adopted to carry out pilot test research, and the water treatment amount of the pilot test is 2.5 tons/day.
This example is substantially the same as example 1, except that the regenerant denitrification module is a shortcut nitrification-anaerobic ammonia oxidation unit composed of a shortcut nitrification unit and an anaerobic ammonia oxidation unit. As shown in fig. 2:
the short-cut nitrification unit comprises a short-cut nitrification reactor 3 ', the short-cut nitrification reactor 3 ' is connected with a regenerated liquid storage tank 2 through a pipeline, a short-cut nitrification water inlet pump 10 ' and a first pH regulator 6 are arranged on a connecting pipeline of the short-cut nitrification reactor 3 ' and the regenerated liquid storage tank 2, a water outlet of the short-cut nitrification reactor 3 ' is connected with an aeration pump 21 through a return pipe, a drainage pump 22 is arranged on the return pipe, and a short-cut nitrification water inlet valve 13 ' is arranged on a pipeline formed by connecting the drainage pump 22 and the short-cut nitrification water inlet pump 10 ' in parallel.
In this embodiment, the ammonia nitrogen adsorbing material in the ammonia nitrogen adsorbing column 1The zeolite is natural zeolite, 8 groups of ammonia nitrogen adsorption units are adopted to run in parallel, and 2 groups are used for standby. The volume of the regeneration liquid is 100L. NH in the regenerated liquid to be treated4 +The concentration of N was 324.6 mg/L. 50% of the regeneration liquid to be treated is drained by the drainage pump 22, and a sodium bicarbonate and sodium carbonate mixed solution is added by adjusting the first pH adjuster 6. The volume of the short-cut nitrification reactor 3' is 20L, and the operation condition is as follows: HRT is 8h, SRT is 4d, DO is controlled at 1.0mg/L, and temperature is controlled at 32 ℃. ANAMMOX reactor 4 feed water NH4 +-N＝142.9mg/L，NO2 -N concentration 181.6mg/L, NH4 +-N/NO2 --N ═ 1: 1.27, close to the theoretical value of 1.32. A mixed solution of sodium bicarbonate and sodium carbonate is added by adjusting the second pH adjuster 7. The volume of the ANAMMOX reactor 4 is 30L, anaerobic granular sludge is filled in the ANAMMOX reactor, the hydraulic retention time is 8h, and the temperature is controlled at 32 ℃. ANAMMOX reactor 4 effluent NH4 +N concentration of 7.52mg/L, NH4 +A load of-N of 0.54kg/m3/d，NO2 -N concentration 1.83mg/L, NO2 -N load of 0.69kg/m3/d，NO3 -The concentration of N is 16.61mg/L, and the treated regeneration liquid directly flows into a regeneration liquid storage tank 2 for recycling.
Compared with the existing treatment process of the tail water of the sewage treatment plant, the process has the advantages of short time, high efficiency, less investment, low occupied area and the like, can effectively solve the problem that the ammonia nitrogen in the tail water of the sewage treatment plant exceeds the standard, can reduce the investment cost by 61.7 percent compared with the MBR treatment process, and has practical benefit on the upgrading and reconstruction of the sewage treatment plant.
Example 4
Aiming at the pump station sewage outlet water with the ammonia nitrogen concentration of 15mg/L, the treated water meets the requirement of GB18918-2002 first-grade A standard (5 mg/L). Pilot study was carried out using a sidestream CANON system with a pilot water treatment capacity of 1 ton/day.
This example is substantially the same as example 1, except that the regenerant denitrification module is a completely autotrophic denitrification unit. As shown in fig. 3:
the whole-process autotrophic nitrogen removal unit comprises a CANON reactor 3 ', the inlet of the CANON reactor 3' is connected with a regenerated liquid storage box 2 through a pipeline, a CANON water inlet pump 10 ', a CANON water inlet valve 13' and a second pH regulator 7 are arranged on the connecting pipeline of the CANON reactor 3 'and the CANON water inlet pump, the CANON water inlet valve 13' and the second pH regulator 7, the outlet of the CANON reactor 3 'is connected with the regenerated liquid storage box 2 through a regenerated liquid circulating pipe, and a CANON reactor water drainage valve 16' is arranged on the regenerated liquid circulating pipe; the CANON reactor 3' is also connected with an aeration pump 21.
In this embodiment, the ammonia nitrogen adsorbing material in the ammonia nitrogen adsorbing column 1 is a combination of natural zeolite and molecular sieve, and 4 groups of ammonia nitrogen adsorbing units are used for parallel operation, and 1 group is for standby. The volume of the regeneration liquid is 50L. NH in the regenerated liquid to be treated4 +The concentration of-N was 233.1 mg/L. A mixed solution of sodium bicarbonate and sodium carbonate is added through the second pH adjuster 7. CANON reactor 3 "volume is 25L, and inside packing has the filler of hanging the good membrane, and operating condition is: HRT 12h, pH 8.0, DO 1.0mg/L, temperature 32 ℃. CANON reactor 3' NH in the effluent4 +N concentration 7.93mg/L, NH4 +N load of 0.92kg/m3/d，NO2 -N concentration 1.62mg/L, NO3 -The concentration of-N is 21.12mg/L, and the treated regeneration liquid directly flows into a regeneration liquid storage tank for recycling. The CANON reactor packing during pilot plant is shown in FIG. 7.
Compared with the existing treatment process, the process has the advantages of high ammonia nitrogen removal efficiency and small occupied area, can effectively remove ammonia nitrogen in dry sewage and initial rainwater, and has remarkable effects on sewage interception of a sewage discharge outlet and treatment of black and odorous water.
In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the following claims.
Claims (8)
1. An ammonia nitrogen high-efficiency removal system based on a sidestream shortcut nitrification-anaerobic ammonia oxidation process is characterized by comprising an ammonia nitrogen adsorption unit, a heating regeneration unit and a regenerated liquid denitrification module;
the ammonia nitrogen adsorption unit comprises a sewage inlet pump (8), an inlet valve (11), an ammonia nitrogen adsorption column (1) filled with adsorption materials and an emptying valve group which are connected in sequence;
the heating regeneration unit comprises a regeneration liquid storage box (2) and a regeneration liquid inlet pump (9) which are sequentially connected, the regeneration liquid storage box (2) is connected with a regeneration liquid inlet of the ammonia nitrogen adsorption column (1) through the regeneration liquid inlet pump (9), regeneration liquid is filled in the regeneration liquid storage box (2), the regeneration liquid is heated in the regeneration liquid storage box (2) through a sewage source heat pump (20), the regeneration liquid storage box (2) is connected with a precipitator (5), a calcium removal precipitator is filled in the precipitator (5), the regeneration liquid storage box (2) is further connected with the ammonia nitrogen adsorption unit and recovers the regeneration liquid flowing out of the ammonia nitrogen adsorption column (1);
the regenerated liquid denitrification module is a side flow shortcut nitrification-anaerobic ammonia oxidation denitrification unit, and the side flow shortcut nitrification-anaerobic ammonia oxidation denitrification unit is connected with a regenerated liquid storage box (2) of the heating regeneration unit.
2. The system for efficiently removing ammonia nitrogen based on the sidestream shortcut nitrification-anaerobic ammonia oxidation process according to claim 1, wherein the sidestream shortcut nitrification-anaerobic ammonia oxidation denitrification unit is a two-stage denitrification unit or a one-stage denitrification unit, wherein the two-stage denitrification unit comprises a partial nitrosation-anaerobic ammonia oxidation unit and a shortcut nitrification-anaerobic ammonia oxidation unit;
the one-stage denitrification unit is a completely autotrophic denitrification unit.
3. The system for efficiently removing ammonia nitrogen based on the sidestream shortcut nitrification-anaerobic ammonia oxidation process according to claim 2, wherein the two-stage denitrification unit comprises: a partial nitrosation-anaerobic ammonia oxidation unit formed by combining a partial nitrosation unit and an anaerobic ammonia oxidation unit, or a partial nitrification-anaerobic ammonia oxidation unit formed by combining a partial nitrification unit and an anaerobic ammonia oxidation unit.
4. The system for efficiently removing ammonia nitrogen based on the sidestream shortcut nitrification-anaerobic ammonia oxidation process according to claim 3, wherein the partial nitrosation unit comprises a partial nitrosation reactor (3), the partial nitrosation reactor (3) is connected with the regeneration liquid storage tank (2) through a pipeline, a partial nitrosation water inlet pump (10) and a first pH regulator (6) are arranged on the connecting pipeline, and the partial nitrosation reactor (3) is connected with an aeration pump (21).
5. The system for efficiently removing ammonia nitrogen based on the sidestream shortcut nitrification-anaerobic ammonia oxidation process according to claim 3, wherein the shortcut nitrification unit comprises a shortcut nitrification reactor (3 '), the shortcut nitrification reactor (3 ') is connected with the regeneration liquid storage tank (2) through a pipeline, a shortcut nitrification water inlet pump (10 ') and a first pH regulator (6) are arranged on a connecting pipeline of the shortcut nitrification reactor and the regeneration liquid storage tank, the shortcut nitrification reactor (3 ') is connected with the aeration pump (21), a water outlet of the shortcut nitrification reactor (3 ') is connected with the regeneration liquid storage tank (2) through a return pipe, and a drainage pump (22) is arranged on the return pipe.
6. The system for efficiently removing ammonia nitrogen based on the sidestream shortcut nitrification-anaerobic ammonia oxidation process according to claim 3, wherein the anaerobic ammonia oxidation unit comprises an ANAMMOX reactor (4), an ANAMMOX water inlet pipeline is arranged at an inlet of the ANAMMOX reactor (4), a regeneration liquid circulating pipeline is arranged at an outlet of the ANAMMOX reactor, and a second pH regulator (7) is arranged on the ANAMMOX water inlet pipeline; when combined with a partial nitrosation unit, the ANAMMOX water inlet line is connected to a partial nitrosation reactor (3); when combined with a shortcut nitrification unit, the ANAMMOX water inlet pipeline is connected with a shortcut nitrification reactor (3'); the regenerated liquid circulating pipeline is connected with a regenerated liquid storage tank (2).
7. The system for efficiently removing the ammonia nitrogen based on the sidestream shortcut nitrification-anaerobic ammonia oxidation process, according to claim 2, is characterized in that the completely autotrophic nitrogen removal unit comprises a CANON reactor (3 "), the inlet of the CANON reactor (3") is connected with the regenerated liquid storage tank (2) through a pipeline, a CANON water inlet pump (10 ") and a second pH regulator (7) are arranged on the connecting pipeline of the CANON reactor and the CANON reactor, and the outlet of the CANON reactor (3") is connected with the regenerated liquid storage tank (2) through a regenerated liquid circulating pipe; the CANON reactor (3') is also connected with an aeration pump (21).
8. The system for efficiently removing ammonia nitrogen based on the sidestream shortcut nitrification-anaerobic ammonia oxidation process according to claim 1, wherein a plurality of groups of ammonia nitrogen adsorption units are connected in parallel and share one heating regeneration unit.
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