CN211521743U - Device for treating urban sewage by utilizing partial nitrosation-anaerobic ammonia oxidation process - Google Patents
Device for treating urban sewage by utilizing partial nitrosation-anaerobic ammonia oxidation process Download PDFInfo
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Abstract
A device for treating urban sewage by using a partial nitrosation-anaerobic ammonia oxidation process comprises an anaerobic ammonia oxidation bacteria enrichment culture device and a continuous flow PN/A autotrophic biological denitrification device. Anaerobic ammonium oxidation bacterium enrichment breeding device is including joining in marriage water tank, liquid medicine bucket, enrichment breeding reactor and control system, continuous flow PN/A autotroph denitrification facility includes the intake pump, PN/A reactor, sedimentation tank, mud backwash pump and sludge discharge pump, and the intake pump extraction is through the municipal sewage of decarbonization pretreatment, and aeration equipment is established to PN/A reactor bottom, and its trachea is connected with the air-blower, and the import and the intake pump of PN/A reactor are connected, and the export and the access connection of sedimentation tank of PN/A reactor, the sludge discharge pipe of sedimentation tank bottom links to each other with sludge discharge pump and mud backwash pump respectively, and the pipeline that sludge discharge pipe and mud backwash pump link to each other is connected to on the pipeline that intake pump and PN/A reactor are connected. The device has the advantages of high starting speed, low concentration of nitrate in the effluent, stable operation and suitability for biological denitrification of urban sewage.
Description
Technical Field
The utility model relates to a municipal sewage treatment technical field, in particular to a device for treating municipal sewage by utilizing partial nitrosation-anaerobic ammonia oxidation process for biological denitrification of municipal sewage.
Background
Anammox is known as one of the most surprising environmental biotechnology, and since the anammox phenomenon was discovered in the last 90 th century, research on applying it to sewage treatment is becoming a hot spot. The anammox bacteria is a kind of autotrophic planctomycete, which can oxidize ammonia into nitrogen by using nitrite as an electron acceptor. The full-process autotrophic denitrification of sewage can be realized by effectively combining the functions of aerobic Ammonia Oxidizing Bacteria (AOB) and anaerobic ammonia oxidizing bacteria, and the process is called as a partial nitrosation-anaerobic ammonia oxidizing (PN/A) biological denitrification process. Compared with the traditional nitrification-denitrification biological denitrification process, the PN/A process only needs to oxidize partial ammonia nitrogen under aerobic conditions, and can save 60 percent of oxygen supply requirement; and no additional carbon source is needed, so that organic matters contained in the sewage are liberated and separated through a proper process technology, and the organic matters can be used for producing energy or recovering resources, so that the purposes of energy self-sufficiency and energy output in the sewage treatment process can be realized, and the process is an energy-saving new sewage treatment process with great application prospect.
At present, PN/A process is successfully applied to high ammonia nitrogen sewage treatment, and particularly in the treatment of sludge digestive fluid of a sewage treatment plant (namely a sidestream anaerobic ammonia oxidation process), hundreds of engineering application cases are provided all over the world. Since the last 90 s, the application of PN/A process to the treatment of municipal sewage with relatively low ammonia nitrogen concentration has gained more and more research attention, and is generally called as 'mainstream anaerobic ammonia oxidation process' or 'mainstream P' correspondinglyN/A' process. Ammonia Nitrogen (NH) in municipal sewage4 +-N) concentration is relatively low, nitrite Nitrogen (NO)2 --N) as an intermediate product of the nitration reaction, which is readily utilized by nitrite-oxidizing bacteria (NOB) to form nitrate Nitrogen (NO)3 -N), namely the complete nitration process in the conventional process. The competitive utilization of nitrite nitrogen by NOB and anaerobic ammonium oxidation bacteria is one of the most important challenges for stably realizing the mainstream PN/A process. In the mainstream process, the concentration of free ammonia and free nitrous acid is low, the inhibition effect on NOB is low, and the NOB is difficult to eliminate from the system, so that the anaerobic ammonia oxidizing bacteria become dominant bacteria. Therefore, the mainstream PN/a process is still under research and is not applied to industrial scale.
Because anammox bacteria have a long generation cycle and slow growth, granular sludge or attached (carrier/filler) growth biofilm is considered to be the main means for effectively retaining anammox bacteria. At present, in the research of enrichment culture of anammox bacteria in a laboratory, tap water is mostly adopted for water distribution, and enrichment culture is carried out by adding various nutrient substrates including ammonia nitrogen, nitrite nitrogen, iron salt, alkalinity, various trace elements and the like, but the mode is not suitable for large-scale culture of the anammox bacteria required for actual production.
In the current mainstream PN/a process related research, anammox species were essentially derived from the sidestream anammox process system that processes sludge digestate. In the case that no side flow process system provides anaerobic ammonia oxidation bacteria, the enrichment and cultivation process of the anaerobic ammonia oxidation bacteria is very difficult and slow due to the competitive growth of NOB, and the PN/A system is difficult to start in a relatively short time, so that the problems of high nitrogen concentration of nitrate in effluent of the system, unstable operation and the like are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects existing in the prior art, providing a device for treating urban sewage by utilizing partial nitrosation-anaerobic ammonia oxidation process, having low starting speed block, low concentration of nitrate in effluent and stable operation, and being applicable to biological denitrification of urban sewage.
As the conception, the technical proposal of the utility model is that: a device for treating municipal sewage by using a partial nitrosation-anaerobic ammonia oxidation process is characterized in that: consists of an anaerobic ammonium oxidation bacterium enrichment culture device and a continuous flow PN/A autotrophic biological denitrification device; the anaerobic ammonia oxidation bacteria enrichment culture device comprises a water distribution tank, a liquid medicine barrel, an enrichment culture reactor and a control system, wherein the water distribution tank is connected with a water outlet pool of a sewage treatment plant through a water replenishing pump and a pipeline and is connected with the enrichment culture reactor through a water inlet pump, the liquid medicine barrel is connected with the water distribution tank through a liquid medicine adding pump, the enrichment culture reactor is formed by connecting two chambers added with biological carriers in series according to the water flow direction, and the control system is connected with the water replenishing pump, the liquid medicine adding pump, a liquid level sensor, a temperature controller, the water inlet pump and a heater; the continuous flow PN/A autotrophic biological denitrification device comprises a water inlet pump, a PN/A reactor, a sedimentation tank, a sludge reflux pump and a sludge discharge pump; the municipal sewage that the carbon removal pretreatment was passed through in the intake pump extraction, aeration equipment is established to PN/A reactor bottom, and its trachea is connected with the air-blower, and the import and the intake pump of PN/A reactor are connected, and the export of PN/A reactor and the access connection of sedimentation tank, the mud pipe of sedimentation tank bottom links to each other with mud pump and mud backwash pump respectively, and the pipeline that mud pipe and mud backwash pump link to each other is connected to on the pipeline that intake pump and PN/A reactor are connected.
The stirrer is added into the two chambers of the enrichment culture reactor.
The outlet of the enrichment culture reactor is provided with a porous sieve plate for intercepting the biological carrier.
The enrichment culture reactor is externally provided with a water bath jacket, and the inlet and the outlet of the water bath jacket are connected with a hot water circulating pump and a heater.
The biological carrier adopts a light plastic biological carrier, and the specific surface area is as follows: 500-1000m2/m3。
A liquid level sensor is arranged in the water distribution tank.
A temperature sensor is arranged in the enrichment culture reactor.
The outlet of the PN/A reactor is provided with a porous sieve plate to intercept the biological carrier and is connected with a sedimentation tank.
Compared with the prior art, the utility model discloses a technical innovation and advantage as follows:
1. the utility model adopts the effluent of the urban sewage treatment plant as the raw water for enriching and cultivating the anaerobic ammonium oxidation strain, does not need to add various micronutrient elements, does not need operations such as nitrogen purging and deoxidation, and is suitable for large-scale strain cultivation;
2. the utility model discloses to the municipal sewage of relative low ammonia nitrogen concentration, through throwing activated sludge earlier and cultivateing aerobic ammonia oxidizing bacteria, throw again ripe anaerobic ammonia oxidizing bacteria biological carrier, combine dissolved oxygen control and row mud control, can establish partial nitrosation/anaerobic ammonia oxidation mainstream technology autotrophy biological denitrification system fast;
3. the utility model discloses anammox fungus enrichment breeding device mutually supports with PN/A autotroph denitrification device, appears when NOB restraines not well in PN/A autotroph denitrification device, promotes the anammox activity in the PN/A reactor through exchanging the carrier to reach stable, high-efficient whole autotroph denitrification effect.
Drawings
FIG. 1 is a schematic diagram of the apparatus for treating municipal sewage by using a partial nitrosation-anammox process of the present invention.
In the figure: 1 is anaerobic ammonium oxidation bacterium enrichment breeding device, includes: 1.1-distribution pool; 1.2-medicine liquid barrel; 1.3-enrichment culture reactor; 1.4-control system; 1.5-water replenishing pump; 1.6-dosing pump; 1.7-water inlet pump; 1.8-water bath jacket; 1.9-hot water circulating pump; 1.10-heaters; 1.11-liquid level sensor; 1.12-temperature sensor. 2 is a PN/a autotrophic biological nitrogen removal device, comprising: 2.1-PN/A reactor; 2.2-a sedimentation tank; 2.3-blower; 2.4-water inlet pump; 2.5-sludge reflux pump; 2.6-mud pump.
Detailed Description
The following explains the embodiments of the present invention with reference to the drawings:
a device for treating urban sewage by using a partial nitrosation-anaerobic ammonia oxidation process comprises an anaerobic ammonia oxidation bacteria enrichment culture device and a continuous flow PN/A autotrophic biological denitrification device. The anaerobic ammonium oxidation bacteria enrichment culture device is prepared from local materials, and the carrier biomembrane with anaerobic ammonium oxidation activity is enriched and cultured by utilizing the effluent of the municipal sewage treatment plant; firstly inoculating common nitrified sludge in a PN/A autotrophic biological denitrification device, gradually increasing the AOB activity through a proper control strategy, then putting an anaerobic ammonia oxidation carrier biomembrane with higher activity in an enrichment culture device into the PN/A biological denitrification device, and quickly establishing a stable partial nitrosation/anaerobic ammonia oxidation autotrophic biological denitrification system through a 'sludge-first-membrane-later' starting mode.
The anaerobic ammonia oxidizing bacteria enrichment culture device 1 comprises a water distribution tank 1.1, a liquid medicine barrel 1.2, an enrichment culture reactor 1.3 and a control system. The water distribution tank 1.1 is connected with a water outlet pool of a sewage treatment plant through a water replenishing pump 1.5 and a pipeline and is connected with an inlet of an enrichment culture reactor 1.3 through a water inlet pump 1.7, and the liquid medicine barrel 1.2 is connected with the water distribution tank 1.1 through a medicine adding pump 1.6. The enrichment culture reactor 1.3 is divided into two chambers connected in series according to the water flow direction, biological carriers are added into the two chambers, fluidization of the carriers is kept through a mechanical stirrer, a porous sieve plate is arranged at the outlet of the enrichment culture reactor to intercept the biological carriers, a water bath jacket 1.8 is arranged outside the enrichment culture reactor 1.3, and the inlet and the outlet of the water bath jacket are connected with a hot water circulating pump 1.9 and a heater 1.10.
Light plastic biological carriers are respectively added into two cells connected in series of the enrichment culture reactor to serve as carriers for attachment growth of the anammox bacteria, and the anammox bacteria cultured in a laboratory are inoculated or the common sludge of a municipal sewage treatment plant is directly inoculated. The first grid chamber close to the water inlet is in a relatively high-load state, and the growth rate of the anaerobic ammonia oxidizing bacteria is higher. When the carrier in the first cell is taken out, the carrier in the second cell is moved into the first cell, and simultaneously, fresh carrier is added into the second cell, so that continuous cultivation is facilitated.
The control system is connected with the water replenishing pump, the dosing pump, the liquid level sensor, the temperature controller, the water inlet pump and the heater.
The control system has three functions: 1) the water distribution function, when the water distribution tank liquid level is less than the preset minimum value, start the water distribution procedure: starting a water replenishing pump to pump the effluent of the sewage treatment plant, and simultaneously starting a dosing pump, wherein the dosing concentration is controlled by the operation time of the dosing pump in a set automatic control program; and stopping the water replenishing pump when the liquid level value of the water distribution tank reaches the preset highest liquid level. 2) Water inlet procedure: starting a water inlet program after water distribution is finished: starting a water inlet pump, feeding water into the enrichment cultivation device according to a set flow, stopping a water inlet program when the liquid level in the water distribution tank reaches a preset minimum value, and transferring to a water distribution program. 3) Temperature control function: the heater is controlled according to the numerical value of the temperature sensor in the reactor, and hot water circulates in the water bath jacket through the circulating pump, so that the temperature in the reactor is ensured to be stabilized at 32 +/-2 ℃.
The utility model discloses a city sewage treatment plant goes out water (secondary treatment goes out water or advanced treatment goes out water) and as anammox fungus enrichment breeding device's raw water, the raw water gets into the distribution box and adds ammonia nitrogen and nitrite nitrogen as the matrix of cultivateing anammox fungus wherein supplementarily, does not throw other microelement. The ammonia nitrogen and the nitrite nitrogen are provided by ammonium chloride (or ammonium sulfate) and sodium nitrite solution which are regularly prepared in a liquid medicine barrel.
The continuous flow PN/A autotrophic biological denitrification device comprises a water inlet pump 2.4, a PN/A reactor 2.1, a sedimentation tank 2.2, a sludge reflux pump 2.5 and a sludge discharge pump 2.6. And the water inlet pump 2.4 is used for pumping the municipal sewage subjected to the carbon removal pretreatment. The bottom of the PN/A reactor 2.1 is provided with an aeration device, an air pipe of the aeration device is connected with an air blower 2.3, an inlet of the PN/A reactor 2.1 is connected with a water inlet pump, and an outlet of the PN/A reactor 2.1 is connected with an inlet of a sedimentation tank. The mud pipe of sedimentation tank 2.2 bottom links to each other with dredge pump 2.6 and mud backwash pump 2.5 respectively, and the pipeline that mud pipe and mud backwash pump 2.5 link to each other is connected to on the pipeline that intake pump and PN/A reactor 2.1 are connected, intake pump 2.4 extracts the municipal sewage through decarbonization pretreatment, mixes with the sedimentation tank 2.2 backward flow mud of mud backwash pump 2.5 extraction, with PN/A reactor 2.1's access connection.
The PN/A reactor is inoculated with 'mature' biological carriers in the ordinary nitrified sludge and anaerobic ammonium oxidation bacteria enrichment and cultivation device of the municipal sewage treatment plant. The inlet water of the PN/A reactor is urban sewage pretreated by removing organic matters, and the COD/TN ratio in the inlet water is less than 2.5-3. Aerobic Ammonia Oxidizing Bacteria (AOB) in the PN/A reactor oxidize part of ammonia nitrogen in the sewage into nitrite nitrogen, and anaerobic ammonia oxidizing bacteria attached to the biological carrier oxidize the rest ammonia nitrogen by using the nitrite nitrogen. By adjusting the aeration quantity, the dissolved oxygen in the reactor is controlled to be stabilized at 0.10-0.25 mg/L. And regulating the sludge discharge pump to control the sludge discharge amount of the suspended sludge and controlling the sludge age to be 5-15 days.
The method for the device for treating the municipal sewage by using the partial nitrosation-anaerobic ammonia oxidation process is realized by the following steps:
a) in the enrichment culture reactor 1.3, a lightweight plastic bio-carrier (specific surface area: 500-1000m2/m3) The filling volume ratio of the carrier is 30-60%; inoculating anaerobic ammonium oxidation strain cultured in a laboratory or directly inoculating common sludge of an urban sewage treatment plant;
b) preparing ammonium chloride (or ammonium sulfate) and sodium nitrite solution regularly in a liquid medicine barrel 1.2, setting the running time of a dosing pump 1.6 in a water distribution program of a control system 1.4, and controlling the total nitrogen load of initial water inlet of an enrichment culture reactor 1.3 to be 50g/m3/d；
c) When the concentration of the ammonia nitrogen in the effluent of the enrichment culture reactor 1.3 is lower than 5mg/L, the flow of a water inlet pump 1.7 is gradually increased or the concentration of the matrix in a liquid medicine barrel 1.2 is increased by 10-20% to improve the load of the inlet water nitrogen, and the operation is stabilized after the load of the inlet water nitrogen is increased each time until the total nitrogen removal rate reaches more than 80%, and then the load of the inlet water total nitrogen is increased again.
d) According to the operation mode, the total nitrogen load of the inlet water of the enrichment culture reactor 1.3 reaches 200-300g/m after about 90-120 days3And the total nitrogen removal rate is maintained to be more than 80 percent, and the anaerobic ammonium oxidation bacteria biofilm carrier is cultivated and matured and can be used for feeding a PN/A reactor 2.1.
e) Ordinary nitrified sludge of an urban sewage treatment plant is inoculated in the PN/A reactor 2.1, and the concentration of the inoculated sludge is 3000-4000 mg/L. Extracting the municipal sewage (the COD/TN ratio is less than 2.5-3) from which most of COD is removed through pretreatment by using a water inlet pump 2.4, and controlling the hydraulic retention time of the PN/A reactor 2.1 to be 3-6 h; starting an air blower 2.3, and controlling the dissolved oxygen in the PN/A reactor 2.1 to be not less than 1.5-2.0 mg/L. Starting a sludge reflux pump for 2.5 percent, and controlling the sludge reflux ratio to be 80-100 percent; and (5) starting a sludge discharge pump for 2.6 days, and controlling the sludge age to be 15-20 days.
f) And (3) detecting the ammonia nitrogen concentration of the effluent in the sedimentation tank 2) at regular time, adjusting the rotating speed frequency of an air blower 2.3 and the opening degree of a valve on an aeration pipeline after the ammonia nitrogen of the effluent is lower than 2mg/L, gradually reducing the aeration flow within 3-5 days, and controlling the dissolved oxygen to gradually reduce to 0.10-0.25 mg/L. Dynamically adjusting the flow of a dredge pump 2.5 according to the concentration of the ammonia nitrogen in the effluent, controlling the sludge age to be 5-15 days, and maintaining the concentration of the ammonia nitrogen in the effluent of the sedimentation tank 2.2 to be about 5-8 mg/L: when the ammonia nitrogen in the effluent is higher than 8mg/L, the sludge discharge amount is reduced, and when the ammonia nitrogen in the effluent is lower than 5mg/L, the sludge discharge amount is increased.
g) Timing detection of nitrite Nitrogen (NO) in 2.2 effluent of sedimentation tank2 --N) and nitro Nitrogen (NO)3 --N) concentration, calculating the nitrite nitrogen accumulation rate
When NAR is more than 30%, taking out the anaerobic ammonium oxidation bacteria enrichment culture device 1.3, culturing mature anaerobic ammonium oxidation bacteria biomembrane carrier in the first grid chamber, and adding the anaerobic ammonium oxidation bacteria biomembrane carrier into the PN/A reactor 2.1 at a volume ratio of 25-40%; and the carriers in the second compartment of the enrichment culture reactor 1.3 are transferred to the first compartment while fresh carriers are added in the second compartment to continue culturing the anammox bacteria. The dissolved oxygen in the PN/A reactor 2.1 is maintained to be stable at 0.10-0.25mg/L, the sludge age is dynamically maintained for 5-15 days according to the ammonia nitrogen concentration of the effluent, and the ammonia nitrogen concentration of the effluent is controlled to be 1-2 mg/L.
h) Regularly detect the water inlet and outlet ammonia Nitrogen (NH) of the PN/A reactor 2.14 +-N) and nitro Nitrogen (NO)3 --N) concentration, calculating the ratio of nitrate to nitrogen (Delta NO) produced by removing unit ammonia nitrogen3 --N/ΔNH4 +-N)：
When Delta NO3 --N/ΔNH4 +-N<0.2, maintaining the current operating conditions unchanged; when Delta NO3 --N/ΔNH4 +when-N is greater than 0.2,taking out 5-10% of the biological carriers in the PN/A reactor 2.1 every 7-15 days, and exchanging the biological carriers with the mature carriers with the same volume in the first grid of the enrichment culture device 1.3 until the delta NO is reached3 --N/ΔNH4 +the-N ratio is restored to below 0.2.
The technical effects of the present invention will be further explained below with reference to specific application examples:
the first embodiment is as follows: the secondary treatment effluent of a western sewage treatment plant in the Tianjin economic technology development area is used as the inlet water of the enrichment culture device, ammonium chloride and sodium nitrite are added into the inlet water, and the initial ammonia nitrogen and nitrite nitrogen concentration is 20-30 mg/L. The effective volume of the enrichment culture device is 600L, 300L of plastic carriers are loaded, and 10L of anaerobic ammonium oxidation strain sludge cultured in a laboratory is inoculated. According to the steps b, c and d, the concentration of the ammonia nitrogen and the nitrite nitrogen of the inlet water is gradually increased to 120mg/L of 100-2/d。
The second embodiment is as follows: the secondary treatment effluent of a north pond sewage treatment plant in an Tianjin economic technology development area is used as the inlet water of an enrichment culture device, ammonium chloride and sodium nitrite are added into the inlet water, and the initial ammonia nitrogen and nitrite nitrogen concentration is 20-30 mg/L. The effective volume of the enrichment culture device is 1.6m3700L of plastic carriers are loaded, and mature 70L of anaerobic ammonium oxidation bacteria carriers are cultured in an enrichment culture device of the western sewage treatment plant in the first embodiment. According to the steps b, c and d, after 90 days, the total nitrogen increase of the inlet water is 417.5 +/-29.0 mg/L, the total nitrogen removal rate is 81.8 percent, and the nitrogen removal rate of the surface of the carrier membrane reaches 2.00gN/m2/d。
The effective volume of the PN/A reactor is 160L, the effluent of the aeration grit chamber of the north pond sewage treatment plant is used for the water inlet of the test, the front-end carbon separation pretreatment is carried out, the COD concentration of the inlet water is 50-120 mg/L, and NH is carried out4 +The concentration of-N is 23-33mg/L, and the concentration of TN is 32-43 mg/L. Inoculating dewatered sludge of a sewage treatment plant, acclimatizing and culturing for 1 month according to the step e), and adding the dewatered sludge into an enrichment culture device according to the steps f and g) to culture mature anaerobic ammonium oxidation bacteria carriers 48L. The test result shows that the stable operation lasts for 1 monthThen a partial nitrosation/anaerobic ammoxidation main flow process biological denitrification process can be established, the COD concentration of the effluent is 20-30mg/L, and NH is added4 +The concentration of-N is 0.2-2mg/L, and the concentration of TN is 8-12 mg/L.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A device for treating municipal sewage by using a partial nitrosation-anaerobic ammonia oxidation process is characterized in that: consists of an anaerobic ammonium oxidation bacterium enrichment culture device and a continuous flow PN/A autotrophic biological denitrification device; the anaerobic ammonia oxidation bacteria enrichment culture device comprises a water distribution tank, a liquid medicine barrel, an enrichment culture reactor and a control system, wherein the water distribution tank is connected with a water outlet pool of a sewage treatment plant through a water replenishing pump and a pipeline and is connected with the enrichment culture reactor through a water inlet pump, the liquid medicine barrel is connected with the water distribution tank through a liquid medicine adding pump, the enrichment culture reactor is formed by connecting two chambers added with biological carriers in series according to the water flow direction, and the control system is connected with the water replenishing pump, the liquid medicine adding pump, a liquid level sensor, a temperature controller, the water inlet pump and a heater; the continuous flow PN/A autotrophic biological denitrification device comprises a water inlet pump, a PN/A reactor, a sedimentation tank, a sludge reflux pump and a sludge discharge pump; the municipal sewage that the carbon removal pretreatment was passed through in the intake pump extraction, aeration equipment is established to PN/A reactor bottom, and its trachea is connected with the air-blower, and the import and the intake pump of PN/A reactor are connected, and the export of PN/A reactor and the access connection of sedimentation tank, the mud pipe of sedimentation tank bottom links to each other with mud pump and mud backwash pump respectively, and the pipeline that mud pipe and mud backwash pump link to each other is connected to on the pipeline that intake pump and PN/A reactor are connected.
2. The apparatus for treating municipal sewage using a partial nitrosation-anammox process according to claim 1, wherein: the stirrer is added into the two chambers of the enrichment culture reactor.
3. The apparatus for treating municipal sewage using a partial nitrosation-anammox process according to claim 1, wherein: the outlet of the enrichment culture reactor is provided with a porous sieve plate for intercepting the biological carrier.
4. The apparatus for treating municipal sewage using a partial nitrosation-anammox process according to claim 1, wherein: the enrichment culture reactor is externally provided with a water bath jacket, and the inlet and the outlet of the water bath jacket are connected with a hot water circulating pump and a heater.
5. The apparatus for treating municipal sewage using a partial nitrosation-anammox process according to claim 1, wherein: the biological carrier adopts a light plastic biological carrier, and the specific surface area is as follows: 500-1000m2/m3。
6. The apparatus for treating municipal sewage using a partial nitrosation-anammox process according to claim 1, wherein: a liquid level sensor is arranged in the water distribution tank.
7. The apparatus for treating municipal sewage using a partial nitrosation-anammox process according to claim 1, wherein: a temperature sensor is arranged in the enrichment culture reactor.
8. The apparatus for treating municipal sewage using a partial nitrosation-anammox process according to claim 1, wherein: the outlet of the PN/A reactor is provided with a porous sieve plate to intercept the biological carrier and is connected with a sedimentation tank.
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| CN110776101A (en) * | 2019-11-22 | 2020-02-11 | 中国市政工程华北设计研究总院有限公司 | Device for treating urban sewage by utilizing partial nitrosation-anaerobic ammonia oxidation process and method used by device |
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