CN211734093U - Efficient removal system of ammonia nitrogen based on side-stream short-path nitrification-anammox process - Google Patents

Abstract

The utility model relates to a high-efficiency ammonia nitrogen removal system based on a side-stream short-range nitrification-anaerobic ammonia oxidation process, comprising 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 unit filled with adsorption materials. Ammonia nitrogen adsorption column (1); the temperature-raising regeneration unit comprises a regeneration liquid storage tank (2) and a regeneration liquid inlet pump (9) connected in sequence, and the regeneration liquid storage tank (2) passes through the regeneration liquid inlet pump (9). ) is connected to the regeneration liquid inlet of the ammonia nitrogen adsorption column (1), the regeneration liquid is heated by the sewage source heat pump (20) in the regeneration liquid storage tank (2), and the regeneration liquid storage tank (2) is also connected to the ammonia nitrogen adsorption unit and The regeneration liquid flowing out from the ammonia nitrogen adsorption column (1) is recovered; the regeneration liquid denitrification module is connected to the regeneration liquid storage tank (2) of the heating regeneration unit. Compared with the prior art, the utility model has the advantages of low cost, good effect and the like.

Description

Efficient removal system of ammonia nitrogen based on side-stream short-path nitrification-anammox process

technical field

The utility model belongs to the technical field of environmental protection and sewage treatment, in particular to an ammonia nitrogen high-efficiency removal system based on a side-flow short-range nitrification-anaerobic ammonia oxidation process.

Background technique

In recent years, with the development of industrialization, the pollution problem caused by ammonia nitrogen wastewater has become increasingly serious. Ammonia nitrogen is one of the important factors that destroy the balance of water body and cause eutrophication of water body. Its excessive discharge will cause great harm to the ecological environment and human body. It will not only promote eutrophication of water body, but also produce foul odor and cause obstacles to water supply. Ammonia nitrogen in sewage mainly comes from wastewater and landfill leachate discharge from chemical fertilizer, tanning, aquaculture, petrochemical, meat processing and other industries, as well as urban sewage and agricultural irrigation drainage. During the 13th Five-Year Plan period, my country has put forward higher requirements for ammonia nitrogen discharge, and how to economically and efficiently remove ammonia nitrogen from sewage has become a research focus. At present, there are many technologies used to remove ammonia nitrogen: biological denitrification, ammonia stripping and stripping, breakpoint chlorination, chemical precipitation and ion exchange. The biological denitrification method is most used in China, but the conventional process requires aeration facilities and the addition of a carbon source, resulting in high operating costs and a large area; the ammonia stripping stripping method has a simple process flow, but needs to solve the Ammonia gas collection and outlet problems, and scale is easily generated during operation, which affects operation; breakpoint chlorination method has high denitrification efficiency and is suitable for advanced treatment of wastewater, but by-product chloramine will cause secondary pollution; chemical precipitation method It is suitable for various concentrations of ammonia nitrogen wastewater, but no cheap and efficient precipitating agent has been found for application. The ion exchange method has the advantages of low investment and simple process, but the regeneration cost is high, and the regeneration liquid is still high concentration ammonia nitrogen wastewater. Further processing is required.

The anaerobic ammonium oxidation (ANAMMOX) process, which has been extensively studied in recent years, provides a new way for wastewater denitrification. Compared with the traditional nitrification/denitrification denitrification process, the ANAMMOX process can reduce the input of organic carbon sources by 100%. Increase the amount, reduce the aeration amount by 60%, and reduce the mud production by 90%, which has a wide range of application prospects. However, in view of the current research progress, the ANAMMOX process is difficult to apply to mainstream sewage treatment, and the difficulties are mainly as follows: (1) The optimum temperature for the growth of ANAMMOX bacteria is 30-35 °C, however, municipal sewage with large amounts of water is difficult to meet the requirements of ANAMMOX bacteria. temperature requirements. (2) The ammonia nitrogen concentration in municipal sewage is about 30 mg/L, which is low and will seriously affect the activity of ANAMMOX bacteria. (3) There are various impurity ions and toxic substances in mainstream sewage, and direct introduction will inhibit the activity of ANAMMOX bacteria. (4) ANAMMOX is prone to residual NO ₃ ^- -N and NO ₂ ^- -N in the mainstream sewage treatment, causing the effluent quality to exceed the standard. Therefore, if we can find a process route that can not only meet the living conditions of ANAMMOX bacteria, but also realize the efficient and stable removal of ammonia nitrogen, it is undoubtedly an economical and efficient technical route. At present, there is no technical report on this aspect at home and abroad.

Chinese patent CN107804890A discloses a treatment system and method for improving the long-term adsorption performance of ammonia nitrogen adsorption materials. The treatment system includes an ammonia nitrogen adsorption unit and a regeneration unit. The ammonia nitrogen adsorption unit includes a sewage inlet pump, a water inlet valve, a The ammonia nitrogen adsorption column and the venting valve group of the adsorption material, the regeneration unit includes a regeneration liquid storage tank and a regeneration liquid inlet pump connected in sequence, the regeneration liquid storage tank is equipped with regeneration liquid, and the regeneration liquid inlet pump is An oxidant feeder is connected to the outlet pipeline, and the oxidant feeder is equipped with an oxidant. The invention uses oxidant-containing regeneration liquid during operation, and the regeneration treatment cost is high. At the same time, the oxidant used in the invention will react with ammonia nitrogen to generate other products, resulting in the continuous decrease of the concentration of the oxidant in the regeneration liquid and the gradual reduction of the regeneration efficiency. It becomes high-concentration ammonia nitrogen wastewater, which is difficult to reuse and cannot meet the discharge standard, and still needs further treatment.

Utility model content

The purpose of this utility model is to provide an efficient ammonia nitrogen removal method based on the side-stream short-path nitrification-anammox process in order to overcome the above-mentioned defects of the prior art. This high-efficiency ammonia nitrogen removal technology can solve the problems that restrict the application of the ANAMMOX process due to the difficulty of providing suitable temperature for mainstream sewage treatment, the low concentration of ammonia nitrogen in the influent, the existence of impurity ions and toxic substances, and the unstable removal efficiency. At the same time, it can also solve the problems that the regeneration cost of the ammonia nitrogen adsorption material is relatively high and the regeneration liquid cannot be reused in the prior art.

Based on the problems that the current ANAMMOX process is difficult to be applied in mainstream sewage due to the limitation of process conditions, the regeneration cost of ammonia nitrogen adsorption material is relatively high, and the high concentration of ammonia nitrogen in the regeneration liquid needs to be further processed, the present utility model proposes a side-stream short-path nitrification- The technical route of efficient removal of ammonia nitrogen by anammox process. The utility model applies the segmental short-range nitrification-anammox (SHARON-ANAMMOX), partial nitrification-anammox (PN-ANAMMOX), and the whole process of autotrophic denitrification (CANON) to the side stream sewage treatment , the front end is connected to the ammonia nitrogen adsorption regeneration process. At the same time, a sewage source heat pump is added in the process of ammonia nitrogen adsorption and regeneration, and the heat energy in the urban raw sewage is used to control the temperature of the regeneration liquid, so as to improve the regeneration efficiency and regeneration speed. Compared with the current ammonia nitrogen adsorption regeneration process and the mainstream ANAMMOX process, the utility model has the advantages of low regeneration cost of the adsorption material, stable operation of the ANAMMOX system, stable effluent quality and the like. The sewage source heat pump is used as a low-level heat source to make the overall treatment process more energy-saving and environmentally friendly. At the same time, the utility model can also realize the treatment and reuse of the regenerated liquid, with low floor space and significant economic benefit and practical engineering significance.

The purpose of the present utility model can be achieved through the following technical solutions:

An efficient ammonia nitrogen removal system based on a side-stream short-range nitrification-anaerobic ammonia oxidation process, characterized in that it comprises an ammonia nitrogen adsorption unit, a heating regeneration unit and a regeneration liquid denitrification module;

The ammonia nitrogen adsorption unit includes a sewage water inlet pump, a water inlet valve, an ammonia nitrogen adsorption column filled with adsorption materials and a vent valve group connected in sequence; the adsorption material is selected from natural zeolite, modified zeolite, molecular sieve, fly ash One or more of; the hydraulic retention time (HRT) of sewage in the ammonia nitrogen adsorption unit is 1-120min;

The temperature-raising regeneration unit includes a regeneration liquid storage tank and a regeneration liquid inlet pump connected in sequence, the regeneration liquid storage tank is connected to the regeneration liquid inlet of the ammonia nitrogen adsorption column through the regeneration liquid inlet pump, and the regeneration liquid storage tank is equipped with The regeneration liquid is heated by the sewage source heat pump in the regeneration liquid storage tank. The regeneration liquid storage tank is connected to the precipitant dosing device. The regeneration liquid storage tank is also connected to the ammonia nitrogen adsorption unit and recovers the regeneration liquid flowing out from the ammonia nitrogen adsorption column;

Described regeneration solution is sodium salt, potassium salt, calcium salt solution or mixed solution, and the concentration is 0.01-100g/L. The influent of the sewage source heat pump is reclaimed water or secondary effluent treated by the sewage treatment plant. The heating temperature of the regenerated liquid is 25-50°C;

The regeneration time of the regeneration liquid for the ammonia nitrogen adsorption material is 0.5-72h.

The reaction principle of the present utility model is as follows:

Ammonia nitrogen adsorption unit: solid ammonia nitrogen adsorption material removes ammonia nitrogen in sewage through ion exchange mechanism, so that the effluent meets the requirements of relevant national standards, and its reaction is shown in formula (1).

Among them, A ⁺ is the exchangeable ion on the surface of the ammonia nitrogen adsorption material, and Z ^- is the structure of the adsorption material.

Temperature-raising regeneration unit: The heating-up regeneration unit uses metal cations in the regeneration liquid to exchange NH ₄ ⁺ on the surface of the ammonia nitrogen adsorption material into the solution to realize the regeneration of the ammonia nitrogen adsorption material, and uses the sewage source heat pump to heat the regeneration liquid to increase the regeneration rate. The regeneration reaction is shown in formula (2).

Among them, B ⁺ is the metal cation in the regeneration liquid. This reaction is an endothermic reaction, and heating the regeneration solution is beneficial to the desorption of the ammonia nitrogen adsorption material and realizes rapid and efficient regeneration.

With the increase of the regeneration times of the ammonia nitrogen adsorption unit, the desorbed ammonia nitrogen will be enriched in the regeneration liquid. Conventional biological treatment is to convert ammonia nitrogen into nitrate nitrogen, and then use the method of adding carbon source to denitrify, but this method will increase the treatment cost and floor space.

Aiming at the removal requirement of high-concentration ammonia nitrogen in the regenerated liquid, the utility model intends to use the regenerated liquid denitrification module, that is, the short-range nitrification-anammox denitrification unit for processing. The short-path nitrification-anammox denitrification unit is connected to the regeneration liquid storage tank of the temperature-raising regeneration unit.

The regeneration liquid denitrification module can adopt a two-stage or one-stage type. The two-stage process can use partial nitrification-anammox (PN-ANAMMOX) and short-path nitrification-anammox (SHARON-ANAMMOX) processes. The one-stage type can adopt the whole process of autotrophic nitrogen removal (CANON). The goal of the front-stage sewage source heat pump heating regeneration liquid is to control the water temperature to be about 35 °C, so as to provide the optimal growth temperature for the functional microorganisms in the short-path nitrification-anammox denitrification process while efficiently desorbing and regenerating. The specific reaction principle of each unit is as follows.

Partial nitrosation (PN) unit: Partial nitrosation is to use nitrosating bacteria to convert 55-60% of NH ₄ ⁺ into NO ₂ ^- , so that the effluent meets the requirements of the ratio of influent substrate in the ANAMMOX reactor, that is, NO ₂ ^- :NH ₄ ⁺ = 1.32. The specific reaction is shown in formula (3).

Short-path nitrification (SHARON) unit: by splitting the regeneration liquid to be treated, a short-path nitrification reaction of part of the regeneration liquid is realized, so that the influent of the ANAMMOX denitrification unit meets the substrate ratio (NH ₄ ⁺ :NO ₂ ⁻ =1:1.32). The short-range nitration reaction is shown in formula (4).

ANAMMOX denitrification unit: The removal of ammonia nitrogen in the regeneration liquid is the key to the continuous adsorption-regeneration cycle. The ANAMMOX denitrification unit utilizes ANAMMOX bacteria to convert NH ₄ ⁺ to N ₂ using NO ₂ ^- as an electron acceptor under anoxic conditions. The ANAMMOX process is shown in formula (5).

CANON denitrification unit: The CANON process is a short-range nitrification and anammox reaction in the same reactor. Through ammonia oxidizing bacteria (AOB) and ANAMMOX bacteria under the condition of low DO content, AOB uses O ₂ as an electron acceptor to convert NH ₄ ⁺ -N is oxidized to NO ₂ ^- -N, ANAMMOX uses NO ₂ ^- -N produced by AOB as an electron acceptor, reacts with the remaining NH ₄ ⁺ -N to generate N ₂ to achieve the purpose of denitrification. The CANON process is shown in formula (6).

Partial nitrification and short-range nitrification will consume part of the alkalinity, and the presence of NH ₄ ⁺ in the regeneration solution to be treated will reduce the pH of the solution, the reaction is shown in formula (7).

Aiming at the problem of lowering the pH of the regenerated solution to be treated, the method of adding alkalinity is used to maintain the optimum range of pH entering the ANAMMOX denitrification unit. The addition of alkalinity is achieved by adding a pH buffer. The reaction formulas (8) and (9) ), (10) are:

OH ^- +H ⁺ →H ₂ O (10)

The short-path nitrification-anammox denitrification unit is a two-stage denitrification unit or a one-stage denitrification unit, wherein the two-stage denitrification unit includes a partial nitrification-anammox unit and a short-path nitrification-anammox unit Oxygen ammonia oxidation unit; one-stage denitrification unit is a full autotrophic denitrification unit.

The two-stage denitrification unit is: a partial nitrification-anammox unit formed by a combination of a partial nitrification unit and an anammox unit, or a combination of a short-range nitrification unit and an anammox unit. Short-path nitrification-anammox unit;

in,

The partial nitrosation unit includes a partial nitrosation reactor, which is connected to the regeneration liquid storage tank through a pipeline, and is provided with an inlet pump and a first pH regulator on the connecting pipeline. The partial nitrosation reactor Connect the aeration pump;

The short-path nitrification unit includes a short-path nitrification reactor, the short-path nitrification reactor is connected to the regeneration liquid storage tank through a pipeline, and an inlet water pump and a first pH regulator are arranged on the connecting pipeline of the two, and the short-path nitrification reactor is connected to the aerator. an air pump, the water outlet of the short-range nitrification reactor is connected to the regeneration liquid storage tank through a return pipe, and a drainage pump is arranged on the return pipe;

The anammox unit includes an ANAMMOX reactor, the inlet of the ANAMMOX reactor is provided with an ANAMMOX water inlet pipeline, the outlet is provided with a regenerating liquid circulation pipeline, and the ANAMMOX water inlet pipeline is provided with a second pH regulator; When the nitrification unit is combined, the ANAMMOX water inlet pipeline is connected to part of the nitrosation reactor; when combined with the short-path nitrification unit, the ANAMMOX water inlet pipeline is connected to the short-path nitrification reactor; the regenerated liquid circulation pipeline is connected to the regenerated liquid storage tank.

The whole process autotrophic denitrification unit includes a CANON reactor, the inlet of the CANON reactor is connected to the regeneration liquid storage tank through a pipeline, and an inlet water pump and a first pH regulator are arranged on the connecting pipeline of the two, and the outlet of the CANON reactor is provided. The regeneration liquid storage tank is connected through the regeneration liquid circulation pipe; the CANON reactor is also connected with the aeration pump.

Multiple groups of the ammonia nitrogen adsorption units are connected in parallel and share a heating regeneration unit.

Using the above three different regenerative liquid denitrification modules to carry out regenerative liquid denitrification schemes are described in detail as follows:

The first regenerative liquid denitrification scheme: partial nitrification-anammox unit

This regenerative liquid denitrification scheme adopts PN-ANAMMOX process. The partial nitrosation unit includes a partial nitrosation feed pump, a partial nitrosation feedwater valve, a partial nitrosation reactor and a vent valve group connected in sequence, and the partial nitrosation feedwater pump is connected to the regeneration liquid storage tank and the partial nitrosation. The pipeline between the nitrification reactors, the part of the nitrosation reactor is filled with nitrification sludge, the part of the nitrosation reactor is connected to the aeration pump, and the water inlet pipeline of the part of the nitrosation reactor is connected to the first pH regulator, the first pH regulator is equipped with a pH buffer. The ANAMMOX denitrification unit includes a water inlet valve, an ANAMMOX reactor and a venting valve group connected in sequence, the venting valve group includes a venting valve and a regeneration liquid return valve, and the regeneration liquid return valve is connected to the regeneration liquid storage tank. , the ANAMMOX water inlet pipeline is connected with a second pH regulator, and the second pH regulator is equipped with a pH buffer.

Further, the seeded sludge in some nitrosation reactors is one or both of short-path nitrification sludge or front-end sludge of aerobic tank.

Further, the NH ₄ ⁺ -N concentration of the influent of some nitrosation reactors is 50-2000 mg/L.

Further, the HRT of the regenerated liquid to be treated in the partial nitrosation reactor is 2-48h.

Further, the SRT of the partial nitrosation reactor is 5-200d.

Further, the DO of part of the nitrosation reactor is controlled at 0.2-3.0 mg/L.

Further, the pH in the partial nitrosation reactor is controlled at 6.5-8.5.

Further, the temperature in the partial nitrosation reactor is controlled at 25-40°C.

Further, the inoculated sludge in the ANAMMOX reactor is one or both of ANAMMOX granular sludge and ANAMMOX fillers that have been hung with membranes.

Further, the HRT of the regenerated liquid to be treated in the ANAMMOX reactor is 2-72h.

Further, the influent NH ₄ ⁺ -N concentration of the ANAMMOX reactor is 50-2000 mg/L.

Further, the pH buffers in the first and second pH regulators are selected from one or more of carbonate, bicarbonate, sodium hydroxide, and lime.

The second denitrification scheme of regenerated liquid: short-path nitrification-anammox unit

This regenerative liquid denitrification scheme adopts SHARON-ANAMMOX process. The short-path nitrification unit includes a short-path nitrification feed pump, a short-path nitrification feed water valve, a short-path nitrification reactor and a venting valve group connected in sequence, and the short-path nitrification feed pump is connected between the regenerating liquid reserve tank and the short-path nitrification reactor. Pipeline, the short-path nitrification reactor is filled with nitrification sludge, the short-path nitrification reactor is also connected to an aeration pump, the short-path nitrification unit is also equipped with a drainage pump, and the drainage pump is connected to the regeneration liquid reserve tank and ANAMMOX reaction A first pH regulator is connected to the water inlet pipeline of the short-range nitrification reactor, and a pH buffer is installed in the first pH regulator. The ANAMMOX denitrification unit includes a water inlet valve, an ANAMMOX reactor and a venting valve group connected in sequence, the ANAMMOX reactor is filled with anaerobic granular sludge, and the venting valve group includes a venting valve and a regeneration liquid. Return valve, the regeneration liquid return valve is connected to the regeneration liquid storage tank, the ANAMMOX water inlet pipeline is connected to a second pH regulator, and the second pH regulator is filled with a pH buffer.

Further, the inoculated sludge in the short-path nitrification reactor is one or both of the short-path nitrification sludge or the front-end sludge of the aerobic tank.

Further, the influent NH ₄ ⁺ -N concentration of the short-path nitrification reactor is 50-2000 mg/L.

Further, the drainage flow rate of the drainage pump of the short-range nitrification unit is 25%-75% of the regeneration liquid to be treated.

Further, the HRT of the regenerated liquid to be treated in the short-path nitrification reactor is 2-48h.

Further, the SRT of the short-path nitrification reactor is 1-200 d.

Further, the DO in the short-path nitrification reactor is controlled at 0.3-3.0 mg/L.

Further, the pH in the short-path nitrification reactor is controlled at 6.5-8.5.

Further, the temperature in the short-path nitrification reactor is controlled at 25-40°C.

Further, the inoculated sludge in the ANAMMOX reactor is one or both of ANAMMOX granular sludge and ANAMMOX fillers that have been hung with membranes.

Further, the HRT of the regenerated liquid to be treated in the ANAMMOX reactor is 2-72h.

Further, the influent NH ₄ ⁺ -N concentration of the ANAMMOX reactor is 50-2000 mg/L.

Further, the pH buffers in the first and second pH regulators are selected from one or more of carbonate, bicarbonate, sodium hydroxide, and lime.

The third regenerative liquid denitrification scheme: autotrophic denitrification unit in the whole process

This regenerative liquid denitrification scheme adopts CANON process. Described CANON denitrification unit comprises CANON water inlet pump, CANON water inlet valve, CANON reactor and venting valve group connected successively, described CANON inlet water pump is connected with the pipeline between regeneration liquid storage tank and CANON reactor, so Described venting valve group comprises venting valve and regeneration liquid return valve, described regeneration liquid return valve is connected with regeneration liquid storage tank, described CANON water inlet pipeline is connected with the second pH regulator, and described second pH regulator is equipped with inside. pH buffer.

Further, the influent NH ₄ ⁺ -N concentration of the CANON reactor is 50-2000 mg/L.

Further, the HRT of the regenerated liquid to be treated in the CANON reactor is 3-72h.

Further, the 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 is maintained in the range of 25-40°C.

Further, the inoculated sludge in the CANNON reactor is one or both of ANAMMOX granular sludge and ANAMMOX fillers with membranes already attached.

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 using the described system is characterized in that, comprising the following steps:

1) The ammonia nitrogen-containing sewage to be treated is continuously pumped into the ammonia nitrogen adsorption unit by the sewage water inlet pump, and discharged through the outlet of the ammonia nitrogen adsorption unit until the effluent of the ammonia nitrogen adsorption unit reaches the set concentration (the set value that meets the relevant discharge standards), and then the sewage water intake pump is stopped. run.

2) Start the regeneration liquid inlet pump, the regeneration liquid heated by the sewage source heat pump is pumped into the ammonia nitrogen adsorption unit from the regeneration liquid storage tank, and the ammonia nitrogen adsorption material is fully soaked for regeneration treatment, and the regeneration liquid is returned to the regeneration liquid storage tank to complete a Adsorption regeneration cycle.

3) In the first regenerated liquid denitrification scheme, the regenerated liquid containing high-concentration ammonia nitrogen is pumped into the partial nitrosation reactor through the partial nitrosation feed pump, and after the reaction in the partial nitrosation reactor is completed, it is passed through the ANAMMOX denitrification feed pump. Into the ANAMMOX reactor.

4) In the second regeneration liquid denitrification scheme, the regeneration liquid containing high-concentration ammonia nitrogen is pumped into the short-path nitrification reactor through the short-path nitrification feed pump, and at the same time, the drainage pump diverts part of the regeneration liquid to be treated, and the regeneration liquid that completes the short-path nitrification is separated. After mixing, it was pumped into the ANAMMOX reactor.

5) In the third denitrification scheme of the regeneration liquid, the regeneration liquid containing high concentration of ammonia nitrogen is directly pumped into the CANON reactor through the CANON inlet water pump.

6) In the first regenerated liquid denitrification scheme and the second regeneration liquid denitrification scheme, the pH buffer is first added to the partial nitrification and short-range nitrification reactors through the first pH regulator, and then adjusted through the second pH regulator. It is added to the regeneration liquid that has completed partial nitrification and short-range nitrification, and is simultaneously pumped into the ANAMMOX reactor through the ANAMMOX denitrification feed pump, where the denitrification is completed in the ANAMMOX reactor, and the treated regeneration liquid is discharged to the regeneration liquid through the drain valve. The reserve tank is reused; in the third denitrification scheme of the regeneration liquid, the pH buffer is directly added to the regeneration liquid to be treated, and is simultaneously pumped into the CANON reactor through the CANON inlet pump, and the whole process of autotrophic denitrification is carried out in the CANON reactor. The regenerated liquid is discharged to the regeneration liquid storage tank through the drain valve for reuse.

7) Multiple groups of ammonia nitrogen adsorption units can be connected in parallel, sharing a heating regeneration unit.

The utility model is based on the short-range nitrification-anammox process, and realizes the complete denitrification of the ammonia nitrogen adsorption-regeneration-short-range nitrification-anammox process by denitrifying the high-concentration regeneration liquid. The ammonia nitrogen in the sewage is adsorbed and removed by the ammonia nitrogen adsorption unit, and the ammonia nitrogen concentration in the effluent can reach the GB18918-2002 national first-level A emission standard or even the more stringent category IV standard. During regeneration, the regeneration liquid is heated by the sewage source heat pump. On the one hand, increasing the temperature makes the regeneration rate faster, and the regeneration effect is significantly improved; A denitrification unit provides suitable reaction temperatures. The short-range nitrification and partial nitrification unit converts the high concentration of ammonia nitrogen in the regenerated liquid to be treated into nitrous nitrogen, which provides suitable substrate concentration for the influent of the ANAMMOX denitrification unit. The pH of the influent is stabilized by adding a pH buffer to the influent of the partial nitrification, short-range nitrification, ANAMMOX denitrification and CANON denitrification units. The effluent of the ANAMMOX denitrification and CANON denitrification units is the regeneration after removal of ammonia nitrogen The regenerated liquid can be directly flowed into the regeneration liquid storage tank for reuse of the regeneration liquid. When the interfering ions in the regeneration solution reach a certain concentration, the interfering ions are converted into precipitation by adding a precipitant and separated into solid-liquid to achieve the purpose of removing the interfering ions.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model can be used for the removal of ammonia nitrogen and total nitrogen from urban sewage, industrial waste water, initial rainwater and black and odorous water bodies. Compared with the prior art, the utility model has the following advantages:

(1) Through the design of the process unit of rapid adsorption-activation regeneration of ammonia nitrogen, the purpose of quickly removing ammonia nitrogen and total nitrogen under low occupation and short HRT is realized, and the concentration of ammonia nitrogen and total nitrogen in the effluent of sewage treatment system and polluted water can be effectively controlled;

(2) The ANAMMOX process is applied to the side stream ammonia nitrogen removal of the regenerated liquid, avoiding the high cost problems of the original stripping, sodium hypochlorite oxidation, nitrification regeneration-additional carbon source denitrification and other processes;

(3) The overall process design of ammonia nitrogen adsorption-regeneration-short-path nitrification-anaerobic ammonia oxidation has significant innovation, which can not only use the adsorption-regeneration unit to achieve ammonia nitrogen enrichment, avoid the problem of too low ammonia nitrogen concentration in mainstream systems, but also It can avoid the inhibitory effect of toxic substances in sewage on ANAMMOX bacteria, and also avoid the problem that the total nitrogen in the effluent exceeds the standard (50-70mg/L) caused by the residual nitrate or nitrite after the ANAMMOX system reaction, and the residual nitrate or nitrite It can be used in subsequent cycles.

(4) The temperature-warming regeneration is organically coupled with the optimal temperature environment of AOB and ANAMMOX bacteria. The utility model uses the sewage source to increase the temperature of the regeneration liquid, which not only helps to improve the regeneration efficiency of the ammonia nitrogen adsorption material, accelerates the regeneration rate, but also provides favorable environmental conditions for the growth and proliferation of AOB and ANAMMOX bacteria. Effectively reduce the energy consumption of sewage treatment.

(5) Appropriate salt concentration not only helps to improve the regeneration efficiency of ammonia nitrogen, but also promotes AOB and ANAMMOX bacteria and improves the denitrification performance.

(6) By adding alkalinity, a suitable pH range for partial nitrification, short-range nitrification, ANAMMOX denitrification and CANON denitrification was achieved. The ANAMMOX bacteria use CO ₂ as the carbon source, and can provide CO ₂ to the ANAMMOX bacteria while adjusting the pH by adding alkalinity to improve the treatment efficiency of the ANAMMOX denitrification unit and the CANON denitrification unit.

Description of drawings

Fig. 1 is the schematic flow sheet of the first kind of ammonia nitrogen efficient removal technology based on short-path nitrification-anammox process;

Fig. 2 is the schematic flow sheet of the second kind of ammonia nitrogen high-efficiency removal technology based on short-path nitrification-anammox process;

3 is a schematic flow diagram of a third type of high-efficiency ammonia nitrogen removal technology based on short-path nitrification-anammox process;

Fig. 4 is the water quality situation diagram of entering and leaving the system during the pilot test of embodiment 2;

Fig. 5 is the partial nitrosation inflow and outflow water quality situation diagram of entering and exiting part of the nitrosation reactor during the pilot test of embodiment 2;

Fig. 6 is the water quality situation diagram of the inlet and outlet water entering and leaving the ANAMMOX reactor during the pilot test of Example 2;

Figure 7 is a schematic diagram of the packing in the CANON reactor during the pilot test.

The figure is marked as follows:

Ammonia nitrogen adsorption column 1, regeneration liquid storage tank 2, partial nitrosation reactor 3, short-range nitrification reactor 3', CANON reactor 3", ANAMMOX reactor 4, precipitant dosing device 5, first pH regulator 6, The second pH regulator 7, the sewage feed pump 8, the regeneration liquid feed pump 9, the partial nitrosation feed pump 10, the short-range nitrification feed pump 10', the CANON feed pump 10", the feed water valve 11, the regeneration fluid feed water valve 12, Partial nitrosation inlet valve 13, short-range nitrification inlet valve 13', CANON inlet valve 13", ANAMMOX denitrification inlet valve 14, ammonia nitrogen adsorption column drain valve 15, ANAMMOX reactor drain valve 16, CANON reactor drain valve 16', regeneration liquid return valve 17, vent valve 18, exhaust valve 19, sewage source heat pump 20, aeration pump 21, drainage pump 22.

The line segments in the figure are identified as follows:

Detailed ways

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the embodiments or the description of the prior art. Obviously, the embodiments in the following description are only of the present invention. In some embodiments, for those of ordinary skill in the art, other solutions can also be obtained according to these embodiments without any creative effort. The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

An efficient ammonia nitrogen removal system based on short-path nitrification-anammox process, the flow chart is shown in Figure 1, including ammonia nitrogen adsorption unit, heating regeneration unit, partial nitrosation unit and ANAMMOX denitrification unit. The ammonia nitrogen adsorption unit includes a sewage water inlet pump 8 , a water inlet valve 11 , an ammonia nitrogen adsorption column 1 filled with adsorption materials, and an ammonia nitrogen adsorption column drain valve 15 , which are connected in sequence.

The heating regeneration unit includes a regeneration liquid storage tank 2, which is connected to the ammonia nitrogen adsorption column 1 through a pipeline, and a regeneration liquid inlet pump 9 and a regeneration liquid inlet valve 12 are arranged on the connecting pipelines of the two in turn. Regeneration liquid is installed in the reserve tank 2. The regeneration liquid storage tank 2 is also connected to the sewage source heat pump 20 and the precipitant dosing device 5. The regeneration liquid storage tank 2 is connected to the ammonia nitrogen adsorption column 1 and recovers the regeneration liquid flowing out from the ammonia nitrogen adsorption column 1. Regeneration Between the liquid storage tank 2 and the ammonia nitrogen adsorption column 1, a regeneration liquid return valve 17 and a vent valve 18 are also provided, and the regeneration liquid is a 10 g/L sodium chloride solution.

The partial nitrosation unit comprises the partial nitrosation water inlet pump 10, the water inlet valve 13, and the partial nitrosation reactor 3 connected in sequence, and the described partial nitrosation water inlet pump 10 is connected to the regeneration liquid storage tank 2 and the partial nitrosation water inlet valve 13. The pipeline between the two, and the pipeline is also provided with a first pH regulator 6, and part of the nitrosation reactor 3 is also connected to the aeration pump 21, and the inoculated sludge in the part of the nitrosation reactor 3 adopts nitrification. sludge.

The ANAMMOX denitrification unit includes a second pH regulator 7, an ANAMMOX water inlet valve 14, an ANAMMOX reactor 4, and an ANAMMOX reactor drain valve 16, which are connected in sequence. The inoculated sludge in the ANAMMOX reactor 4 is anaerobic granular sludge. , the ANAMMOX reactor 4 and the regeneration liquid storage tank 2 are connected through the regeneration liquid circulation pipeline, and the ANAMMOX reactor drain valve 16 is set on the regeneration liquid circulation pipeline to reuse the regeneration liquid and the gas generated by the ANAMMOX reactor 4 Exhaust through exhaust valve 19 . A pH buffer is added to the effluent of the partial nitrosation reactor 3 through the second pH regulator 7, and the buffer is selected from at least one of sodium carbonate or sodium bicarbonate.

The specific steps are as follows: the ammonia nitrogen sewage to be treated is injected into the ammonia nitrogen adsorption column 1 by the sewage water inlet pump 8 through the water inlet valve 11, and the adsorption material in the ammonia nitrogen adsorption 1 fully adsorbs the ammonia nitrogen in the sewage, and after reaching the preset running time, the sewage inlet is closed. Pump 8, open the drain valve 15 and vent valve 18 of the ammonia nitrogen adsorption column, and regenerate the ammonia nitrogen adsorption column 1 after draining all the treated water. During regeneration, open the regeneration liquid return valve 17, close the drain valve 15 and the vent valve 18. After the regeneration liquid is heated by the sewage source heat pump 20, the regeneration liquid is discharged from the storage tank 2 by the regeneration liquid inlet pump 9 through the regeneration liquid inlet valve 12. Drive into the ammonia nitrogen adsorption column 1. When the regeneration liquid is filled with the ammonia nitrogen adsorption column 1, it returns to the regeneration liquid storage tank 2 through the regeneration liquid return valve 17 to form a cyclic regeneration treatment system. After the regeneration, the regeneration liquid inlet pump 9 and the regeneration liquid inlet water are turned off The valve 12 allows the regeneration liquid to completely return to the regeneration liquid storage tank 2 to complete the regeneration. After the regeneration is completed, it is pumped into the high-concentration ammonia nitrogen sewage to be treated for adsorption. After each regeneration 4-10 times, the precipitant is added to the regeneration liquid storage tank 2 through the precipitant dosing device 5 and stirred, and it settles after sufficient reaction. Finally, the sediment is discharged through the mud hopper. The treated regenerated liquid is pumped into the partial nitrosation reactor 3 by the partial nitrosation feed water pump 10 through the partial nitrosation feedwater valve 13, and the flow rate of the first pH regulator 6 is adjusted at the same time. The regenerated liquid to be treated that has completed part of the nitrosation reaction is pumped into the ANAMMOX reactor 4 by the ANAMMOX denitrification inlet pump through the ANAMMOX inlet valve 14, the ANAMMOX drain valve 16 is opened, and the flow rate of the second pH regulator 7 is adjusted at the same time to make it proportional to the ANAMMOX reactor 4. The regenerated liquid to be treated is mixed into the reactor, and the treated regenerated liquid is returned to the regenerated liquid storage tank 2 to form a circulating treatment system to complete the reuse of the regenerated liquid. The gas generated by the ANAMMOX reactor 4 is discharged through the exhaust valve 19 .

Example 2

For the sewage with ammonia nitrogen concentration of 25mg/L in a sewage treatment plant, it needs to meet the requirements of GB18918-2002 Grade A standard (5mg/L) after treatment. The above-mentioned system is used for pilot-scale research, and the pilot-scale water treatment capacity is 2.2 tons/day.

The sewage enters the ammonia nitrogen adsorption column 1 from the sewage water inlet pump 8 through the water inlet valve 11. The ammonia nitrogen adsorption column 1 has a volume of 1 L and is filled with natural zeolite. The hydraulic retention time is 5min, the adsorption operation time is 4h, the water volume can be 48L in one operation, 12L/h per hour, 264L/d per day (calculated by 22h), and 8 groups of ammonia nitrogen adsorption columns are used in parallel In operation, 2 groups of ammonia nitrogen adsorption columns are used for standby. After the preset running time is reached, the sewage inlet pump 8 is turned off, the drain valve 15 and the vent valve 18 are opened, and all the treated water is drained for regeneration. During regeneration, close the ammonia nitrogen adsorption column drainage valve 15 and the vent valve 18, after the regeneration liquid is heated by the sewage source heat pump 20, the regeneration liquid inlet pump 9 is driven from the regeneration liquid storage tank 2 through the regeneration liquid water inlet valve 12. Ammonia nitrogen adsorption unit in operation, the volume of regeneration liquid is 100L. When the regeneration liquid submerges the adsorbent material, close the regeneration liquid inlet pump 9 and the regeneration liquid inlet valve 12, so that the adsorbent material is fully immersed in the regeneration liquid. After the regeneration is completed, open the regeneration liquid return valve 17, and the regeneration liquid is returned to the regeneration liquid storage tank 2 to complete the regeneration. After the regeneration is completed, it enters the ammonia nitrogen adsorption stage again. After 4 regenerations, the regeneration liquid is purified. Add sodium carbonate solution to device 5. The NH ₄ ⁺ -N concentration in the regenerated liquid after purification is 418 mg/L, and the regenerated liquid to be treated enters the partial nitrosation reactor 3 from the partial nitrosation feed water pump 10 through the partial nitrosation feed water valve 13, and at the same time, by adjusting the No. A pH regulator 6 is added to the sodium bicarbonate solution. The volume of the partial nitrosation reactor 3 is 150L, and the operating conditions of the partial nitrosation reactor 3: HRT is 12h, SRT is 15d, DO is controlled at 1mg/L, and temperature is controlled at 32°C. The concentration of NH ₄ ⁺ -N in the effluent of part of the nitrosation reactor is 189.4 mg/L, the concentration of NO ₂ ^- -N is 227.2 mg/L, and NH ₄ ⁺ -N/NO ₂ ^- -N=1:1.2. The partially nitrosated regenerated liquid enters the ANAMMOX reactor 4 through the ANAMMOX denitrification water inlet valve 14 , and at the same time, sodium bicarbonate solution is added by adjusting the second regulator 7 . The volume of ANAMMOX reactor 4 is 50L, filled with anaerobic granular sludge, the hydraulic retention time is 8h, and the temperature is controlled at 32°C. After the regenerated liquid to be treated enters the reactor, open the drain valve 16 and exhaust valve 19 of the ANAMMOX reactor, and the treated regenerated liquid is returned to the regenerated liquid storage tank 2 through the drain valve 16 of the ANAMMOX reactor for reuse. The generated gas is discharged via the gas valve 19 . During the pilot test, the quality of the influent and effluent and the denitrification of the regeneration liquid are shown in Figures 4 to 6. It can be seen that the ammonia nitrogen concentration in the effluent of the ammonia nitrogen adsorption column 1 is always lower than 5mg/L, which meets the GB18918-2002 Grade A standard (5mg/L). L), at the same time the NH ₄ ⁺ -N concentration in the effluent of the ANAMMOX reactor 4 is 9.33mg/L, the NO ₂ ^- -N concentration is 1.89mg/L, the NO ₃ ^- -N concentration is 31.38mg/L, and the NH ₄ The ⁺ -N load is 0.56kg/m ³ /d, the NO ₂ ^- -N load is 0.67kg/m ³ /d, and the denitrification effect of the regeneration liquid is remarkable.

Compared with the patent CN107804890A, the utility model uses the short-range nitrification-anaerobic ammonia oxidation process in the side stream, which solves the problems that the ammonia nitrogen in the regeneration solution cannot be removed and the regeneration solution is difficult to reuse. Saving 56.8%, the economic effect is remarkable. Compared with the traditional A ² /O process, this process can save 100% of the carbon source and 61.2% of the aeration volume, reduce the floor space by 42.3%, and reduce the sludge output. The in-situ heating fully utilizes the thermal energy in the sewage, realizes the reuse of energy, and reduces the emission of _CO2 , which has significant economic and environmental benefits.

Example 3

For the tail water of a sewage treatment plant with an ammonia nitrogen concentration of 15mg/L, it needs to meet the requirements of GB18918-2002 Grade A standard (5mg/L) after treatment. The pilot-scale study was carried out using the lateral flow SHARON-ANAMMOX system, and the pilot-scale water treatment capacity was 2.5 tons/day.

This embodiment is substantially the same as Embodiment 1, except that the denitrification module of the regenerated liquid is a short-path nitrification-anammox unit composed of a short-path nitrification unit and an anammox unit. as shown in picture 2:

The short-path nitrification unit includes a short-path nitrification reactor 3', the short-path nitrification reactor 3' is connected to the regeneration liquid storage tank 2 through a pipeline, and a short-path nitrification feed pump 10' and a first pH regulator 6 are arranged on the connecting pipelines between the two. , the short-range nitrification reactor 3' is connected to the aeration pump 21, the water outlet of the short-range nitrification reactor 3' is connected to the regenerating liquid storage tank 2 through a return pipe, and a drainage pump 22 is arranged on the return pipe to drain A short-range nitrification inflow valve 13' is arranged on the pipeline where the pump 22 and the short-range nitrification influent pump 10' are connected in parallel.

In this embodiment, the ammonia nitrogen adsorption material in the ammonia nitrogen adsorption column 1 is natural zeolite, and 8 groups of ammonia nitrogen adsorption units are used to operate in parallel, and 2 groups are used for standby. The volume of regeneration solution is 100L. The NH ₄ ⁺ -N concentration in the regeneration solution to be treated was 324.6 mg/L. The drainage pump 22 drains 50% of the regeneration liquid to be treated, and the mixed solution of sodium bicarbonate and sodium carbonate is added by adjusting the first pH regulator 6 . The volume of the short-path nitrification reactor 3' is 20L, operating conditions: HRT is 8h, SRT is 4d, DO is controlled at 1.0mg/L, and temperature is controlled at 32°C. The influent NH ₄ ⁺ -N of ANAMMOX reactor 4 is 142.9 mg/L, the NO ₂ ^- -N concentration is 181.6 mg/L, and the NH ₄ ⁺ -N/NO ₂ ^- -N=1:1.27, which is close to the theoretical value of 1.32. The mixed solution of sodium bicarbonate and sodium carbonate is added by adjusting the second pH regulator 7 . The volume of ANAMMOX reactor 4 is 30L, filled with anaerobic granular sludge, the hydraulic retention time is 8h, and the temperature is controlled at 32°C. The NH ₄ ⁺ -N concentration in the effluent of ANAMMOX reactor 4 is 7.52mg/L, the NH ₄ ⁺ -N load is 0.54kg/m ³ /d, the NO ₂ ^- -N concentration is 1.83mg/L, and the NO ₂ ^- -N load is 1.83mg/L. It is 0.69kg/m ³ /d, the NO ₃ ^- -N concentration is 16.61mg/L, and the treated regeneration solution directly flows into the regeneration solution storage tank 2 for reuse.

Compared with the current sewage treatment plant tail water treatment process, this process has the advantages of short-term high efficiency, low investment and low land occupation, and can effectively solve the problem of excessive ammonia nitrogen in the sewage treatment plant tail water. Compared with the MBR treatment process, the investment The cost can be reduced by 61.7%, which has practical benefits for the upgrading of sewage treatment plants.

Example 4

For the effluent from the sewage outlet of the pump station with an ammonia nitrogen concentration of 15mg/L, it needs to meet the requirements of GB18918-2002 Grade A standard (5mg/L) after treatment. The lateral flow CANON system is used for pilot-scale research, and the pilot-scale water treatment capacity is 1 ton/day.

This embodiment is roughly the same as Embodiment 1, except that the regeneration liquid denitrification module is an autotrophic denitrification unit in the whole process. As shown in Figure 3:

The whole process autotrophic denitrification unit includes CANON reactor 3", the inlet of this CANON reactor 3" is connected to the regeneration liquid storage tank 2 through a pipeline, and a CANON inlet water pump 10", a CANON inlet water pump 10" are arranged on the connecting pipeline of the two. Water valve 13 ″ and the second pH regulator 7, the outlet of CANON reactor 3 ″ is connected to the regeneration liquid storage tank 2 through the regeneration liquid circulation pipe, and the CANON reactor drain valve 16 ′ is provided on the regeneration liquid circulation pipe; the CANON The reactor 3" is also connected to the aeration pump 21.

In this embodiment, the ammonia nitrogen adsorption material in the ammonia nitrogen adsorption column 1 is a combination of natural zeolite and molecular sieve, and 4 groups of ammonia nitrogen adsorption units are used to operate in parallel, and one group is used for standby. The volume of regeneration solution is 50L. The concentration of NH ₄ ⁺ -N in the regeneration solution to be treated was 233.1 mg/L. A mixed solution of sodium bicarbonate and sodium carbonate was added through the second pH regulator 7 . The volume of the CANON reactor 3" is 25L, and the inside is filled with the packing with the membrane hanging. The operating conditions are: HRT is 12h, pH is 8.0, DO is controlled at 1.0mg/L, and temperature is controlled at 32°C. CANON reactor 3" The NH ₄ ⁺ -N concentration in the effluent is 7.93mg/L, the NH ₄ ⁺ -N load is 0.92kg/m ³ /d, the NO ₂ ^- -N concentration is 1.62mg/L, and the NO ₃ ^- -N concentration is 21.12mg /L, the treated regenerated liquid will flow directly into the regenerated liquid storage tank for reuse. The packing in the CANON reactor during the pilot test is shown in Figure 7.

Compared with the current treatment process, this process has the advantages of high ammonia nitrogen removal efficiency and small footprint, which can effectively remove ammonia nitrogen in sewage during drought and initial rainwater, and has significant effects on sewage interception at sewage outlets and the treatment of black and odorous water bodies. Effect.

In addition, it should be noted that, in the specific embodiments described in this specification, the shapes and names of parts and components thereof may be different. All equivalent or simple changes made according to the structure, features and principles described in the patent concept of the present utility model are included in the protection scope of the present utility model patent. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the specific examples described or substitute in similar ways, as long as they do not deviate from the structure of the present invention or go beyond the scope defined by the claims , should belong to the protection scope of the present utility model.

Claims (8)

1. an ammonia nitrogen efficient removal system based on side-stream short-range nitrification-anaerobic ammonia oxidation process, is characterized in that, comprises ammonia nitrogen adsorption unit, temperature rise regeneration unit and regeneration liquid denitrification module; The ammonia nitrogen adsorption unit comprises a sewage water inlet pump (8), a water inlet valve (11), an ammonia nitrogen adsorption column (1) filled with adsorption materials and a venting valve group connected in sequence; The temperature-raising regeneration unit comprises a regeneration liquid storage tank (2) and a regeneration liquid inlet pump (9) connected in sequence, and the regeneration liquid storage tank (2) is connected to the ammonia nitrogen adsorption column (1) through the regeneration liquid inlet pump (9). ) of the regeneration liquid inlet, the regeneration liquid storage tank (2) is equipped with regeneration liquid, the regeneration liquid is heated by the sewage source heat pump (20) in the regeneration liquid storage tank (2), and the regeneration liquid storage tank (2) is heated by the sewage source heat pump (20). 2) Connect the precipitating agent dosing device (5), the precipitating agent dosing device (5) is equipped with a decalcifying precipitating agent, and the regenerating liquid storage tank (2) is also connected to the ammonia nitrogen adsorption unit and recovers from the ammonia nitrogen adsorption unit. The regeneration liquid flowing out of the column (1); The regenerated liquid denitrification module is a side-stream short-path nitrification-anammox denitrification unit, and the side-stream short-path nitrification-anammox denitrification unit is connected to the regeneration liquid storage tank (2) of the temperature-raising regeneration unit. 2. a kind of ammonia nitrogen efficient removal system based on side-stream short-path nitrification-anammox process according to claim 1, is characterized in that, described side-stream short-path nitrification-anammox denitrification unit is two sections A type denitrification unit or a one-stage denitrification unit, wherein the two-stage denitrification unit includes a partial nitrification-anammox unit and a short-path nitrification-anammox unit; The one-stage denitrification unit is a full autotrophic denitrification unit. 3. a kind of ammonia nitrogen efficient removal system based on side flow short-range nitrification-anaerobic ammonium oxidation process according to claim 2, is characterized in that, described two-stage denitrification unit is: partial nitrification unit and anaerobic ammonia oxidation Partial nitrification-anammox unit composed of ammonia oxidation unit, or short-path nitrification-anammox unit composed of short-path nitrification unit and anammox unit. 4. a kind of ammonia nitrogen efficient removal system based on side-stream short-path nitrification-anammox process according to claim 3, is characterized in that, described part of nitrosation unit comprises part of nitrosation reactor (3), the The partial nitrosation reactor (3) is connected to the regeneration liquid storage tank (2) through a pipeline, and a partial nitrosation water inlet pump (10) and a first pH regulator (6) are arranged on the connecting pipeline. The nitrification reactor (3) is connected to the aeration pump (21). 5. a kind of ammonia nitrogen efficient removal system based on side-stream short-path nitrification-anammox process according to claim 3, is characterized in that, described short-path nitrification unit comprises short-path nitrification reactor (3'), this short-path nitrification The nitrification reactor (3') is connected to the regeneration liquid storage tank (2) through a pipeline, and a short-range nitrification feed pump (10') and a first pH regulator (6) are arranged on the connecting pipeline of the two. The nitrification reactor (3') is connected to the aeration pump (21), and the water outlet of the short-range nitrification reactor (3') is connected to the regeneration liquid storage tank (2) through a return pipe, and a drainage pump is provided on the return pipe (twenty two). 6. a kind of ammonia nitrogen efficient removal system based on side-stream short-path nitrification-anammox process according to claim 3, is characterized in that, described anammox unit comprises ANAMMOX reactor (4), this ANAMMOX The inlet of the reactor (4) is provided with an ANAMMOX water inlet pipeline, the outlet is provided with a regenerating liquid circulation pipeline, and the ANAMMOX water inlet pipeline is provided with a second pH regulator (7); when combined with some nitrosation units, The ANAMMOX water inlet pipeline is connected to part of the nitrosation reactor (3); when combined with the short-range nitrification unit, the ANAMMOX water inlet pipeline is connected to the short-range nitrification reactor (3'); the regenerated liquid circulation pipeline is connected to the regenerated liquid storage tank (2). 7. a kind of ammonia nitrogen efficient removal system based on side-stream short-range nitrification-anammox process according to claim 2, is characterized in that, described whole process autotrophic denitrification unit comprises CANON reactor (3 "), The inlet of the CANON reactor (3") is connected to the regeneration liquid storage tank (2) through a pipeline, and a CANON inlet water pump (10") and a second pH regulator (7) are arranged on the connecting pipeline of the two. The CANON reactor (3") The outlet is connected to the regeneration liquid storage tank (2) through the regeneration liquid circulation pipe; the CANON reactor (3") is also connected to the aeration pump (21). 8 . The high-efficiency ammonia nitrogen removal system based on the side-stream short-range nitrification-anaerobic ammonia oxidation process according to claim 1 , wherein multiple groups of the ammonia nitrogen adsorption units are connected in parallel and share a heating regeneration unit. 9 .

Images