CN215855685U - Oxidation ditch processing apparatus and effluent disposal system - Google Patents
Oxidation ditch processing apparatus and effluent disposal system Download PDFInfo
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- CN215855685U CN215855685U CN202122467722.6U CN202122467722U CN215855685U CN 215855685 U CN215855685 U CN 215855685U CN 202122467722 U CN202122467722 U CN 202122467722U CN 215855685 U CN215855685 U CN 215855685U
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Abstract
The utility model discloses an oxidation ditch treatment device and a wastewater treatment system, wherein the oxidation ditch treatment device comprises an anaerobic tank, an anoxic tank, an aerobic tank, a flow guide assembly, a plurality of flow impeller assemblies and a plurality of liftable denitrification biological filler module assemblies; the flow guide assembly comprises a flow guide pipe which is arranged between the anaerobic pool and the anoxic pool and is used for respectively communicating the anaerobic pool and the anoxic pool, and a water outlet gallery and a water inlet gallery which are respectively formed between the anoxic pool and the aerobic pool, wherein the water outlet gallery and the water inlet gallery are oppositely arranged along the width direction of the oxidation ditch treatment device; the anaerobic tank, the anoxic tank and the aerobic tank are respectively provided with at least one flow pusher component, and each flow pusher component comprises a plurality of flow pushers which are used for enabling the wastewater to flow in different directions and at least form self-circulation flow of partial wastewater in the respective tank; and a wastewater treatment system comprising the oxidation ditch treatment device; the utility model realizes good effluent quality under the conditions of not adding new structures and occupying space.
Description
Technical Field
The utility model relates to the field of wastewater treatment, in particular to an oxidation ditch treatment device for efficient denitrification and a wastewater treatment system.
Background
The oxidation ditch is also called as oxidation ditch, and is named as a closed annular ditch because the structure of the oxidation ditch is a closed annular ditch. The method is a modified process of an activated sludge method, and develops and forms various modified processes such as a DE type oxidation ditch, a T type oxidation ditch, a VR type oxidation ditch, a PI type oxidation ditch, an Orbal (Orbal) oxidation ditch, a Carrousel (Carrousel) oxidation ditch, a single-stage Carrousel oxidation ditch, a combined integrated oxidation ditch and the like in recent years. The sewage and the activated sludge in the oxidation ditch continuously and circularly flow in the aeration channel, the hydraulic retention time is long, the organic load is low, and the oxidation ditch essentially belongs to a delayed aeration system.
With the stricter and stricter effluent standard, the traditional oxidation ditch process can not meet the current treatment capability, the contradiction of denitrification and dephosphorization is amplified, and the effluent stability of occasions with higher denitrification and dephosphorization requirements is poorer. The dissolved oxygen in the aeration zone is generally required to be 3-5mg/L, the dissolved oxygen in the non-aeration zone is generally higher than 0.5mg/L, the nitration reaction in the oxidation ditch is sufficient, but the denitrification zone can not be fully performed, the utilization rate of carbon sources is low, and the total nitrogen removal rate is generally only 40-50%. Meanwhile, in the treatment process, the mixing effect is poor, black sludge deposition is often seen on the surface of the oxidation ditch, particularly, the flow speed at the bend is slow, the sludge deposition is more serious, the aeration distribution is uneven, and the gas diffusion rate is low. In addition, the concentration of inlet water rises in winter, so that the sludge concentration of a sewage plant operation improving system increases to improve load, the excessive sludge concentration causes the increase of dead sludge on the surface of an oxidation ditch, the suspended matters of outlet water of the secondary sedimentation tank are excessive, and even floating sludge appears, so that operators are difficult to clean.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome one or more defects in the prior art and provide an oxidation ditch treatment device which can realize good effluent quality under the condition of not adding structures and occupied space.
The utility model also provides a wastewater treatment system comprising the oxidation ditch treatment device.
In order to achieve the purpose, the utility model adopts the following technical scheme: an oxidation ditch treatment device comprises an anaerobic tank, an anoxic tank, an aerobic tank, a flow guide assembly, a plurality of flow impeller assemblies and a plurality of liftable denitrification biological filler module assemblies which are respectively and independently arranged in the anaerobic tank, the anoxic tank and the aerobic tank; the diversion assembly comprises a diversion pipe which is arranged between the anaerobic pool and the anoxic pool and is used for respectively communicating the anaerobic pool and the anoxic pool, and a water outlet gallery and a water inlet gallery which are respectively formed between the anoxic pool and the aerobic pool, wherein the water outlet gallery and the water inlet gallery are oppositely arranged along the width direction of the oxidation ditch treatment device; the anaerobic tank, the anoxic tank and the aerobic tank are respectively provided with at least one flow impeller component, and the flow impeller components comprise a plurality of flow impellers which are used for enabling the wastewater to flow in different directions and at least form self-circulation flow of partial wastewater in the respective tanks.
According to some preferred aspects of the present invention, the length of the aerobic tank is greater than the sum of the length of the anaerobic tank and the length of the anoxic tank.
According to some preferable aspects of the utility model, the oxidation ditch treatment device further comprises a plurality of aeration assemblies which are arranged on the aerobic tank and can move up and down relative to the aerobic tank, and part of aeration pipelines of the aeration assemblies extend into the liftable denitrification biological filler module assemblies which are adjacent to each other and are positioned in the aerobic tank.
According to some preferred aspects of the utility model, in the anaerobic tank, the anoxic tank or the aerobic tank, the liftable denitrification biological filler module assembly comprises a lifting mechanism capable of moving up and down and a denitrification biological filler module detachably arranged on the lifting mechanism.
According to some preferred aspects of the utility model, the aerobic tank comprises a first zone and a second zone, the first zone and the second zone form a circulation loop, and the maximum length of the second zone is greater than the maximum length of the first zone.
According to some preferred aspects of the utility model, the oxidation ditch treatment device further comprises a blocking component for opening and closing the effluent gallery, and a mixed liquor reflux pump for refluxing part of nitrified liquid in the aerobic pool to the anoxic pool, wherein the mixed liquor reflux pump and the blocking component are positioned on the same side of the oxidation ditch treatment device.
The utility model provides another technical scheme that: the utility model provides a wastewater treatment system, wastewater treatment system is including the raw water equalizing basin of waste water that communicates in proper order, be used for filterable grid pond, grit chamber, the aforesaid oxidation ditch processing apparatus, two heavy ponds, sedimentation tank and ultraviolet ray disinfection pond.
According to some preferred aspects of the present invention, the wastewater treatment system further comprises a sludge dewatering device, and the secondary sedimentation tank and the sedimentation tank are respectively communicated with the sludge dewatering device.
According to some preferred aspects of the utility model, the secondary sedimentation tank is also in communication with the anaerobic tank.
According to some preferred aspects of the utility model, the wastewater treatment system further comprises a dosing and phosphorus removal device, and the dosing and phosphorus removal device is communicated with the sedimentation tank.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
based on the problem of poor treatment capacity and treatment effect of the existing oxidation ditch along with stricter effluent standard, the utility model innovatively improves the communication mode among the anaerobic tank, the anoxic tank and the aerobic tank, so that wastewater can flow circularly and smoothly after being treated, and meanwhile, the utility model combines the adoption of the impeller assembly and the liftable denitrification biological filler module assembly to realize the composite process of activated sludge and biomembrane technology, solves the contradiction of denitrification and dephosphorization on sludge age to a certain extent, has the characteristics of impact load resistance, long sludge age and less residual sludge of the traditional biomembrane method, has the high efficiency and flexible operation performance of the activated sludge method, has lower sludge concentration compared with the traditional oxidation ditch process during operation, avoids the sludge expansion phenomenon when the load is higher, and finally realizes the sludge expansion without new structures, The water quality of the effluent is improved under the condition of not newly increasing the occupied space.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of an oxidation ditch processing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the liftable denitrification bio-filler module assembly and the aeration assembly of FIG. 1 without the liftable denitrification bio-filler module assembly;
FIG. 3 is an enlarged schematic view at A in FIG. 2;
FIG. 4 is a schematic view of the apparatus of FIG. 2 with a portion removed;
FIG. 5 is a schematic view showing the construction of a wastewater treatment system according to an embodiment of the present invention;
100, an oxidation ditch treatment device; 110. an anaerobic tank; 120. an anoxic tank; 130. an aerobic tank; 131. a first region; 132. a second region; 140. a liftable denitrification biological filler module component; 150. a water outlet gallery; 160. a water intake gallery; 170. a flow impeller; 180. an aeration assembly; 190. a plugging member;
200. a wastewater raw water adjusting tank; 300. a grid tank; 400. a grit chamber; 500. a secondary sedimentation tank; 600. a sedimentation tank; 700. an ultraviolet disinfection tank; 800. a sludge dewatering device; 900. a dosing and phosphorus removal device;
1. an emptying pipe; 2. an escalator; 3. pretreating a water inlet pipe; 4. a return sludge pipe; 5. a water outlet pipe; 6. an aeration zone; 7. and (7) an air pipe.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 4, the present embodiment provides an oxidation ditch treatment device, the oxidation ditch treatment device 100 comprises an anaerobic tank 110, an anoxic tank 120, an aerobic tank 130, a flow guide assembly, the oxidation ditch treatment device 100 further comprises a plurality of flow impeller assemblies, and a plurality of liftable denitrification biological filler module assemblies 140 respectively and independently arranged in the anaerobic tank 110, the anoxic tank 120 and the aerobic tank 130; wherein, the diversion component comprises a diversion pipe (not shown) which is arranged between the anaerobic tank 110 and the anoxic tank 120 and is used for respectively communicating the anaerobic tank 110 and the anoxic tank 120, and a water outlet gallery 150 and a water inlet gallery 160 which are respectively formed between the anoxic tank 120 and the aerobic tank 130, the water outlet gallery 150 and the water inlet gallery 160 are oppositely arranged along the width direction of the oxidation ditch processing device 100; the anaerobic tank 110, the anoxic tank 120 and the aerobic tank 130 are respectively provided with at least one flow impeller assembly, the flow impeller assembly comprises a plurality of flow impellers 170 which are used for enabling the wastewater to flow in different directions and at least form self-circulation flow of partial wastewater in the respective tanks, and the flow impellers 170 can effectively reduce sludge accumulation in the oxidation ditch and avoid the condition of water flow short circuit.
In this example, the length of the aerobic tank 130 is greater than the sum of the length of the anaerobic tank 110 and the length of the anoxic tank 120.
Specifically, the oxidation ditch treatment device 100 further comprises a plurality of aeration assemblies 180 which are arranged on the aerobic tank 130 and can move up and down relative to the aerobic tank 130, and aeration pipelines of part of the aeration assemblies 180 extend into the adjacent liftable denitrification biological filler module assemblies 140 which are positioned in the aerobic tank 130. The aeration component 180 is connected with air flow through the air pipe 7 and then oxygenizes oxygen into the aerobic tank 130, so as to realize the control of oxygen content. Meanwhile, the aeration component 180 and the lifting type denitrification biological filler module component 140 can not influence each other in the pond, and are reasonably distributed, so that maintenance and repair without stopping water can be conveniently realized.
In this example, the liftable denitrification bio-filler module assembly 140 includes a lifting mechanism capable of moving up and down and a denitrification bio-filler module detachably disposed on the lifting mechanism in the anaerobic tank 110, the anoxic tank 120 or the aerobic tank 130. Wherein the biological filler module of denitrogenation that has separately is located below the liquid level, prevents that the surface mud slick from piling up, and the filler module bottom is apart from the bottom about 3-4m, ensures the oxidation ditch and moves the velocity of flow, can select SJ type high-efficient denitrogenation filler for example, can select corresponding filler as required in each pond, follows elevating system displacement from top to bottom through artifical ligature on elevating system, is convenient for change and operation such as clearance, realizes not shutting down and handles.
In this example, the aerobic tank 130 comprises a first section 131 and a second section 132, the first section 131 and the second section 132 form a circulation loop, and the maximum length of the second section 132 is greater than that of the first section 131.
In this embodiment, the oxidation ditch processing apparatus 100 further comprises a plugging member 190 for opening and closing the effluent gallery 150, and a mixed liquid reflux pump for refluxing a part of the nitrified liquid in the aerobic tank 130 to the anoxic tank 120, wherein the mixed liquid reflux pump and the plugging member 190 are located on the same side of the oxidation ditch processing apparatus 100; furthermore, a frequency converter and an electromagnetic flowmeter are arranged on a pipeline of the mixed liquid reflux pump and used for controlling the reflux size.
Meanwhile, as shown in fig. 1-2, the oxidation ditch treatment apparatus 100 of this embodiment further comprises an aeration zone 6 disposed at the bend of the aerobic tank 130, and vent pipes 1 disposed at the ends of the anaerobic tank 110 and the aerobic tank 130, respectively, wherein the aeration zone 6 can be periodically opened to prevent sludge deposition at the bend, and the vent pipes 1 can discharge waste water during overhaul, etc., for facilitating the overhaul treatment.
As shown in fig. 1, an escalator 2 for operators to get on and off is further provided at one side of the anaerobic tank 110, and other anoxic tanks 120 and aerobic tanks 130 may be provided.
As shown in fig. 5, this embodiment further provides a wastewater treatment system, which comprises a wastewater raw water adjusting tank 200, a grid tank 300 for filtration, a grit chamber 400, the oxidation ditch treatment device 100, a secondary sedimentation tank 500, a sedimentation tank 600 and an ultraviolet disinfection tank 700, which are connected in sequence. The wastewater raw water adjusting tank 200 is used for adjusting the quality and quantity of incoming water, sewage in the adjusting tank is guided into the grid tank 300 through a lifting pump in a lifting pump room, is pumped into the grit chamber 400 after being filtered, and is conveyed into the anaerobic tank 110 of the oxidation ditch treatment device 100 through a pretreatment water inlet pipe.
Further, the grating tank 300 includes two gratings, a coarse grating and a fine grating. The sewage firstly passes through the coarse grids and then enters the grit chamber 400 after passing through the fine grids, and the grit chamber 400 comprises a dosing system, so that required chemicals are added as required after the sewage is pretreated by dosing.
Further, the wastewater treatment system also comprises a sludge dewatering device 800 and a dosing and phosphorus removing device 900, the secondary sedimentation tank 500 and the sedimentation tank 600 are respectively communicated with the sludge dewatering device 800, the secondary sedimentation tank 500 is provided with a sludge pump room, the secondary sedimentation tank 500 is also communicated with the anaerobic tank 110, one part of sludge in the secondary sedimentation tank 500 is conveyed to the front end of the anaerobic tank 110 through a return sludge pump in the sludge pump room through a return sludge pipe 4, the other part of sludge is conveyed to the sludge dewatering device 800 through a residual sludge pump in the sludge pump room and then is transported outside, and the dosing and phosphorus removing device 900 is communicated with the sedimentation tank 600.
Specifically, the process of this example is roughly as follows: the sewage in the wastewater raw water regulating tank 200 is treated by the grid tank 300 and the grit chamber 400 and then conveyed to the anaerobic tank 110 in the oxidation ditch treatment device 100 for anaerobic treatment, the dissolved oxygen is controlled below 0.1mg/L, a denitrification biological filler module is arranged in the anaerobic tank 110, a biofilm is formed on the surface of the filler after acclimation, macromolecular organic matters in the sewage are hydrolyzed and subjected to ring opening, the B/C ratio is improved, the biodegradability is improved, an incoming water carbon source is preferentially utilized, the adding amount of a rear-section carbon source is reduced, the operation cost is saved, and meanwhile, the flow pusher 170 in the anaerobic tank 110 can fully stir the muddy water to play a role in homogenizing the water quality;
sewage in the anaerobic tank 110 flows into the anoxic tank 120 through the flow guide pipe, dissolved oxygen is controlled to be 0.2-0.5mg/L, a denitrification biological filler module is arranged in the anoxic tank 120, so that the denitrification load of the anoxic tank 120 can be improved, denitrification treatment is performed by utilizing a carbon source in water, and total nitrogen is further removed; meanwhile, a carbon source can be properly added, so that nitrate nitrogen is converted into nitrogen, and the effect of reducing total nitrogen is achieved; meanwhile, the flow pusher 170 in the anoxic tank 120 can fully stir the muddy water to achieve the effect of uniform water quality;
the effluent of the anoxic pond 120 flows into the aerobic pond 130 through the water inlet gallery 160, the dissolved oxygen is controlled to be 1-3mg/L, a denitrification biological filler module is arranged in the aerobic pond 130, special aerobic strains can be solidified through biological fillers, so that longer-generation nitrifying bacteria are attached to a biomembrane, the nitrification load is improved, the aeration component 180 is arranged to culture phosphorus accumulating bacteria and short-range nitrifying bacteria by reducing the sludge age, reducing the hydraulic retention time and reducing the aeration quantity to inhibit the growth of the heterotrophic bacteria to finish the microorganism specific culture, and the part of the effluent of the aerobic pond 130 flows back to finish the denitrification and dephosphorization process; the ammonia nitrogen in the water is converted into nitrate nitrogen through nitration reaction in the aerobic tank 130, so that the effect of reducing the ammonia nitrogen is achieved, biofilm formation is uniform, a dissolved oxygen gradient is macroscopically formed, the outer layer of the biofilm is aerobic bacteria, the middle layer of the biofilm is anoxic bacteria, and the inner layer of the biofilm is anaerobic bacteria, so that n microscopic A2/O processes are formed, and the SND effect is achieved. Further, the flow pushers 170 in the aerobic tank 130 can ensure the overall flow rate of the aerobic tank 130 and ensure that the nitrification reaction can be normally performed, and the arrangement of the plurality of flow pushers 170 at each position can ensure that the sewage flows back to the front end of the aerobic tank 130, so that the aerobic tank 130 forms circulation, meanwhile, the sludge can be prevented from depositing at the tail end, and the nitrified liquid can flow back to the anoxic tank 120 through the water outlet gallery 150, thereby achieving the effect of removing total nitrogen. Finally, the effluent flows into the secondary sedimentation tank 500 through the water outlet pipe 5, and the return sludge in the secondary sedimentation tank 500 returns to the anaerobic tank 110 through the return sludge pipe 4 to play a role of sludge supplement.
After being treated by the aerobic tank 130, the sewage enters the secondary sedimentation tank 500 through the water outlet pipe 5, a part of residual sludge generated by the secondary sedimentation tank 500 returns to the anaerobic tank 110 through a return sludge pump, and the other part of residual sludge is conveyed to the sludge dewatering device 800 for treatment and then is discharged. The supernatant of the secondary sedimentation tank 500 flows into the sedimentation tank 600, the sedimentation tank 600 is provided with a dosing and phosphorus removal device 900, and a small amount of phosphorus removal agent is properly added to ensure that the total phosphorus in the effluent reaches the standard. The supernatant fluid passes through the ultraviolet disinfection tank 700 and then is discharged after reaching the standard.
The COD removal rate of the system can reach 98%, the ammonia nitrogen removal rate can reach 99%, the total nitrogen removal rate can reach 85%, compared with the conventional oxidation ditch treatment, the total nitrogen removal effect is good, the effluent can stably reach the standard, the effluent quality is good under the conditions that no new structures are added and no new occupation space is added, and the system is suitable for the current urban special discharge limiting standard.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. An oxidation ditch treatment device comprises an anaerobic tank, an anoxic tank, an aerobic tank and a flow guide assembly, and is characterized by further comprising a plurality of flow impeller assemblies and a plurality of liftable denitrification biological filler module assemblies which are respectively and independently arranged in the anaerobic tank, the anoxic tank and the aerobic tank; the diversion assembly comprises a diversion pipe which is arranged between the anaerobic pool and the anoxic pool and is used for respectively communicating the anaerobic pool and the anoxic pool, and a water outlet gallery and a water inlet gallery which are respectively formed between the anoxic pool and the aerobic pool, wherein the water outlet gallery and the water inlet gallery are oppositely arranged along the width direction of the oxidation ditch treatment device; the anaerobic tank, the anoxic tank and the aerobic tank are respectively provided with at least one flow impeller component, and the flow impeller components comprise a plurality of flow impellers which are used for enabling the wastewater to flow in different directions and at least form self-circulation flow of partial wastewater in the respective tanks.
2. The oxidation ditch treatment apparatus of claim 1, wherein the length of the aerobic tank is greater than the sum of the length of the anaerobic tank and the length of the anoxic tank.
3. The oxidation ditch treatment apparatus of claim 1, further comprising a plurality of aeration assemblies disposed on the aerobic tank and movable up and down relative to the aerobic tank, wherein part of the aeration pipes of the aeration assemblies extend into the liftable denitrification bio-filler module assemblies disposed adjacent to the aerobic tank.
4. The oxidation ditch treatment apparatus of claim 1, wherein the liftable denitrification bio-filler module assembly comprises a lifting mechanism capable of moving up and down and a denitrification bio-filler module detachably disposed on the lifting mechanism in the anaerobic tank, the anoxic tank or the aerobic tank.
5. The oxidation ditch treatment apparatus of claim 1, wherein the aerobic tank comprises a first zone and a second zone, the first zone and the second zone form a circulation loop, and the maximum length of the second zone is greater than the maximum length of the first zone.
6. The oxidation ditch treatment device of claim 1, further comprising a plugging member for opening and closing the effluent gallery, and a mixed liquor reflux pump for refluxing a part of nitrified liquid of the aerobic tank into the anoxic tank, wherein the mixed liquor reflux pump and the plugging member are positioned on the same side of the oxidation ditch treatment device.
7. A wastewater treatment system, which is characterized by comprising a wastewater raw water adjusting tank, a grid tank for filtration, a grit chamber, the oxidation ditch treatment device of any one of claims 1 to 5, a secondary sedimentation tank, a sedimentation tank and an ultraviolet disinfection tank which are communicated in sequence.
8. The wastewater treatment system of claim 7, further comprising a sludge dewatering device, wherein the secondary sedimentation tank and the sedimentation tank are respectively in communication with the sludge dewatering device.
9. The wastewater treatment system of claim 7, wherein the secondary sedimentation tank is further in communication with the anaerobic tank.
10. The wastewater treatment system of claim 7, further comprising a dosing phosphorous removal device in communication with the settling tank.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477657A (en) * | 2022-03-03 | 2022-05-13 | 北京蓝翠鸟环保节能科技有限公司 | Biological intensified treatment technology for high-concentration waste water |
| CN115010258A (en) * | 2022-08-03 | 2022-09-06 | 北京汇馥低碳环保科技有限公司 | Integrated aeration sewage treatment tank for enriching microorganisms in intensive self-circulation manner and construction method thereof |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477657A (en) * | 2022-03-03 | 2022-05-13 | 北京蓝翠鸟环保节能科技有限公司 | Biological intensified treatment technology for high-concentration waste water |
| CN115010258A (en) * | 2022-08-03 | 2022-09-06 | 北京汇馥低碳环保科技有限公司 | Integrated aeration sewage treatment tank for enriching microorganisms in intensive self-circulation manner and construction method thereof |
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