CN201325908Y - Improved sewage treatment system for oxidation ditch - Google Patents
Improved sewage treatment system for oxidation ditch Download PDFInfo
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- CN201325908Y CN201325908Y CNU2008201246780U CN200820124678U CN201325908Y CN 201325908 Y CN201325908 Y CN 201325908Y CN U2008201246780 U CNU2008201246780 U CN U2008201246780U CN 200820124678 U CN200820124678 U CN 200820124678U CN 201325908 Y CN201325908 Y CN 201325908Y
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Abstract
The utility model discloses an improved sewage treatment system for an oxidation ditch, which belongs to the field of sewage treatment. The system comprises an anaerobic pool, a distributing well, an oxygen-deficient pool, an aerobic pool, a rotary cut vortex vertical stirrer, a rotating disc aeration machine and submersible impellers, wherein, a water inlet on the anaerobic pool is connected with the distributing well which is provided with a water inlet pipe and a sludge backflow pipe; the rotary cut vortex vertical stirrer is arranged in the anaerobic pool; the water outlet of the anaerobic pool is sequentially communicated with annular current passages in the oxygen-deficient pool and the aerobic pool to form the oxidation ditch; the submersible impellers are arranged in the oxygen-deficient pool and the aerobic pool; and the rotating disc aeration machine is arranged in the aerobic pool. The sewage treatment system of the utility model is suitable for the treatment of high concentrated organic wastewater, can be used in urban sewage treatment plants of various scales, and is particularly recommended to be used in urban sewage treatment plants of medium and large scales with high denitrification requirements. The discharged water can reach the standard of Level 1 B of national sewage discharge standards, and therefore, the sewage treatment system has good environmental benefit and social benefit.
Description
Technical field
The utility model relates to sewage treatment area, relates in particular to a kind of improvement oxidation channel wastewater treatment system that is used in the sewage disposal.
Background technology
At present, the normal biological denitrification phosphorous removal technique that adopts in sewage disposal, commonly used both at home and abroad at present have the biological carbon and phosphorous removal effect preferably sewage treatment process mainly contain following a few class: A
2O technology and distortion thereof, AO technology, SBR technology and oxidation ditch process.Wherein, oxidation Ditch Technology has all obtained rapid promotion and application in countries in the world, be that a kind of treatment effect is reliable, capital cost is low and dirty water living creature processing technique that working cost is comparatively saved, than the popular oxidation ditch Caro plug (Carrousel) oxidation ditch, Ao Baier (Orbal) oxidation ditch, two ditch formula (DE type) oxidation ditch, three ditch formulas (T type) oxidation ditch arranged at home and abroad at present.
Wherein, the Carrousel 2000 type oxidation ditches of Holland DHV company utility model have increased pre-denitrification zone on former Carrousel oxidation ditch basis, as shown in Figure 1, and in pre-denitrification zone, underwater scooter 3 is set, further improve denitrification effect and stability, and in every oxidation ditch 2, be furnished with a considerable amount of vertical surface aeration machines 4, and utilize vertical surface aeration machine 4, realize plug-flow, mixing and the oxygenation of water body in the ditch.
In the above-mentioned oxidation ditch, owing to only increased pre-denitrification zone, therefore its denitrogenation dephosphorizing effect to sewage does not reach ideal effect, anti impulsion load to water also has much room for improvement, and because the vertical surface aeration machine of the many employings of the aerator that adopts, not only construction and installation inconvenience, and plug-flow, aeration effect are also undesirable, and have flow velocity inequality and sludgd deposition problem.
The utility model content
Based on above-mentioned existing in prior technology problem, the purpose of the utility model embodiment provides a kind of improvement oxidation channel wastewater treatment system, it is bad to solve existing oxidation channel wastewater treatment system denitrogenation dephosphorizing effect, anti impulsion load to water is low, the installation of vertical surface aeration machine, the bad problem of result of use.
The purpose of this utility model is achieved through the following technical solutions:
The utility model embodiment provides a kind of improvement oxidation channel wastewater treatment system, and this system comprises:
Anaerobic pond, distributing well, anoxic pond, Aerobic Pond, rotary-cut eddy current post-type mixer, plate-spinning aerator and underwater scooter;
Water-in on the described anaerobic pond is connected with the distributing well that is provided with water inlet pipe and mud return line, be provided with rotary-cut eddy current post-type mixer in the described anaerobic pond, the water outlet of anaerobic pond is communicated with the formation oxidation ditch successively with the annular flow channel of anoxic pond, Aerobic Pond inside, be equipped with underwater scooter in described anoxic pond, the Aerobic Pond, also be provided with the plate-spinning aerator in the described Aerobic Pond.
Described plate-spinning aerator is many, is uniformly set in the annular flow channel in the described Aerobic Pond.
Described plate-spinning aerator is made of rotary aeration disc, transverse axis, rolling bearing and drive unit; Described transverse axis is arranged on the rolling bearing of bearing support, and transverse axis is connected with drive unit, and rotary aeration disc is made up of two semicircular feature, is arranged on the transverse axis after two semicircular feature are combined into rotary aeration disc.
Uniform distribution is provided with 3～5 rotary aeration discs on the transverse axis of described each Mi Changdu.
Described aerating disc is for adopting glass reinforced plastic die casting or adopting the injection molded surface of polyphenyl material to be furnished with the aerating disc of trapezoidal projection.
Described drive unit is made of step-down gear and electric motor, and step-down gear is arranged on the power output shaft of electric motor.
Underwater scooter in the described Aerobic Pond is many, and is corresponding with many plate-spinning aerators in the Aerobic Pond respectively, in the annular flow channel in the Aerobic Pond of each plate-spinning aerator back underwater scooter is set all.
Described underwater scooter adopts PS series underwater scooter.
Described anaerobic pond inside is square structure, and described rotary-cut eddy current post-type mixer is arranged on the middle part in the anaerobic pond.
The pipeline that described anoxic pond is connected with described Aerobic Pond is provided with the internal reflux control gate.
The technical scheme that is provided by above-mentioned the utility model embodiment as can be seen, the utility model embodiment is by being provided with anaerobic pond before the anoxic pond of oxidation channel wastewater treatment system, by this anaerobic pond as biological selecting area, utilize the high organic loading strain screening, suppress hyphomycetic growth, can improve the clearance of each pollutent, and rotary-cut eddy current post-type mixer is set in anaerobic pond, the plate-spinning aerator is set in Aerobic Pond, after assurance is carried out anaerobic treatment earlier to water inlet, in Aerobic Pond, carry out high efficient aeration, effectively guaranteed effect water conditioning by the plate-spinning aerator.This oxidation channel wastewater treatment system has that effluent quality is good, the impact load that can bear the water yield and water quality, dephosphorization removing nitric efficiency height, mud are easily stable, the plate-spinning aerator cooperates with underwater scooter in the saving energy, Aerobic Pond, is convenient to advantages such as automatization control.The setting of anaerobic zone makes this system be applicable to the processing high concentrated organic wastewater, the municipal sewage plant of various scales, especially exemplary application large-scale municipal sewage plant in denitrogenation is had relatively high expectations, water outlet can reach 1 grade of B standard of state sewage emission standard, has environmental benefit, social benefit preferably.
Description of drawings
The structural representation of the oxidation channel wastewater treatment system that Fig. 1 provides for prior art;
Fig. 2 is the structural representation of the improvement oxidation channel wastewater treatment system of the utility model embodiment;
Fig. 3 is the structural representation of the plate-spinning aerator of the utility model embodiment;
Fig. 4 is the rotary aeration disc structural representation of the plate-spinning aerator of the utility model embodiment;
Among Fig. 1: 1, pre-denitrification pond; 2, Aerobic Pond; 3, underwater scooter; 4, vertical surface aeration machine; A, water inlet pipe; B, reflux sludge tube; C, rising pipe.
Among Fig. 2: 11, anaerobic pond; 12, anoxic pond; 13, Aerobic Pond; 14, internal reflux control gate; 15, manual regulation weir gate; 111, cast iron side's gate; 112, distributing well; 113, rotary-cut eddy current post-type mixer; 121, underwater scooter; 131, plate-spinning aerator; 132, the underwater scooter of Aerobic Pond; A1, water inlet pipe; B1, reflux sludge tube; C1, rising pipe; D1, blow-down pipe;
Among Fig. 3: 31, drive unit; 32, rolling bearing; 33, rotary aeration disc; 34, transverse axis.
Embodiment
The utility model embodiment provides a kind of improvement oxidation channel wastewater treatment system, this system can be used in the processing to trade effluents such as municipal effluent and oil, chemical industry, specifically comprises: anaerobic pond, anoxic pond, Aerobic Pond, diving mixer, aerator and underwater scooter; Wherein, anaerobic pond, distributing well, anoxic pond, Aerobic Pond, rotary-cut eddy current post-type mixer, plate-spinning aerator and underwater scooter; Water-in on the described anaerobic pond is connected with the distributing well that is provided with water inlet pipe and mud return line, be provided with rotary-cut eddy current post-type mixer in the described anaerobic pond, the water outlet of anaerobic pond is communicated with the formation oxidation ditch successively with the annular flow channel of anoxic pond, Aerobic Pond inside, be equipped with underwater scooter in described anoxic pond, the Aerobic Pond, also be provided with the plate-spinning aerator in the described Aerobic Pond.By before the anoxic pond of oxidation channel wastewater treatment system, anaerobic pond being set, and rotary-cut eddy current post-type mixer is set in anaerobic pond, the plate-spinning aerator is set in Aerobic Pond, after assurance is carried out anaerobic treatment earlier to water inlet, in Aerobic Pond, carry out high efficient aeration, effectively guaranteed effect water conditioning by the plate-spinning aerator.Impact load, dephosphorization removing nitric efficiency height, the mud that this oxidation channel wastewater treatment system has is simple in structure, effluent quality good, can bear the water yield and water quality is easily stable, the plate-spinning aerator in the saving energy, Aerobic Pond cooperates with underwater scooter, is convenient to advantages such as automatization control.
For ease of understanding, by specific embodiment embodiment of the present utility model is described further below in conjunction with accompanying drawing.
Embodiment one
Present embodiment provides a kind of improvement oxidation channel wastewater treatment system, can be used for handling, and as shown in Figure 2, this system specifically comprises:
Water-in on the described anaerobic pond 11 is connected with the distributing well 112 that is provided with water inlet pipe A1 and mud return line B1, described anaerobic pond 11 inside are square structure, be provided with rotary-cut eddy current post-type mixer 113 in the middle part of anaerobic pond 11, the water outlet of anaerobic pond 11 successively with anoxic pond 12, the annular flow channel of Aerobic Pond 13 inside is communicated with the formation oxidation ditch, described anoxic pond 12, be equipped with underwater scooter 121 in the Aerobic Pond 13,132, also be provided with plate-spinning aerator 131 in the described Aerobic Pond 13, in the reality, described plate-spinning aerator 131 is made as many, be uniformly set in the annular flow channel in the Aerobic Pond 13, in anoxic pond 12 and the Aerobic Pond 13 many underwater scooters can also be set, underwater scooter 131 in the Aerobic Pond 13 corresponding with many plate-spinning aerators in the Aerobic Pond respectively, every underwater scooter correspondence is arranged in the annular flow channel in the Aerobic Pond of each plate-spinning aerator back, and underwater scooter specifically can adopt PS series underwater scooter.The setting of this underwater scooter can circulate the effect of actively promoting of playing to the mixed solution of rotary aeration disc bottom low regime, and the oxidation ditch bottom velocity is low, the problem of sludgd deposition thereby solve.
In the said system, on anoxic pond 12 and pipeline that Aerobic Pond 13 is connected, internal reflux control gate 14 can also be set, be used to control the sewage backflow of anoxic pond 12 and Aerobic Pond 13.Water outlet place at Aerobic Pond 13 can be provided with manual regulation weir gate 15, is used to regulate the water flow of control total system.
As Fig. 3, shown in, the plate-spinning aerator 132 in the said system is made of rotary aeration disc 33, transverse axis 34, rolling bearing 32 and drive unit 31; Described transverse axis 34 is arranged on the rolling bearing 32 of bearing support, transverse axis 34 1 ends are connected with drive unit 31, rotary aeration disc 33 is made up of two semicircular feature, two semicircular feature are arranged on the transverse axis 34 after being combined into rotary aeration disc, in the reality on the transverse axis of each Mi Changdu general uniform distribution 3～5 rotary aeration discs 33 are set.Wherein, drive unit 31 is made of step-down gear and electric motor, and step-down gear is arranged on the power output shaft of electric motor.
As shown in Figure 4, the aerating disc in the above-mentioned plate-spinning aerator is for adopting glass reinforced plastic die casting or adopting the injection molded surface of polyphenyl material to be furnished with the aerating disc of trapezoidal projection.
In the reality, the oxidation ditch of above-mentioned modified form is the anaerobic zone that is made of anaerobic pond, the aerobic zone that oxygen-starved area that anoxic pond constitutes and Aerobic Pond constitute forms, its principle of work is: sewage with enter anaerobic pond after returned sluge mixes, under the zymogenic effect of amphimicrobian, the larger molecular organics of part readily biodegradable is converted to micromolecular voltaile fatty acid (VFA), polyP bacteria absorbs the synthetic PHB of these small organic molecules and is stored in the cell, simultaneously intracellular poly-phosphorus is hydrolyzed into orthophosphoric acid salt, and be discharged in the water, the energy of release can constrain under the environment at anaerobic for the aerobic polyP bacteria of obligate survives; Sewage enters anoxic pond subsequently, and denitrifying bacteria utilizes organism and the nitrate in the backflow mixed liquor in the sewage to carry out denitrification denitrogenation, also removes a part of carbon simultaneously; When sewage enters oxidation ditch, sewage and mixed solution repeatedly circulate in ditch outside a few ability outlet slots, exist the variation of dissolved oxygen concentration in the oxidation ditch along ditch length, the characteristics that this aerating apparatus is arranged in ditch formed the oxygen-rich area in close aerator downstream and aerator upstream and outer shroud anoxic, anaerobic zone, self form the A/O or the A of different ratios
2The O process realizes dynamic acidication, aerobic decomposition function, reaches the effect of denitrogenation, and the organic concentration in the sewage reduces gradually simultaneously.At this moment, polyP bacteria mainly is to rely on the PHB that stores in the decomposer to obtain energy for self growth, breeding, and the dissolved phosphorus that absorbs in the sewage of excess stores in vivo with the form of poly-phosphate simultaneously; Sewage enters second pond subsequently, and through precipitation, phosphorous high mud is separated from water, and delivers to sludge dewatering system with the form of excess sludge, thereby reaches the effect of dephosphorization.
In the said system, what the aerator in the Aerobic Pond adopted is the plate-spinning aerator, and it has oxygen-transfer efficiency height, simple in structure, characteristics such as installation and maintenance are convenient.The plate-spinning aerator belongs to the horizontal pulling flow type surface aerator of rotating disk class, is made up of rolling bearing, step-down gear and the electric motor at disc, transverse axis and two ends thereof, and the rotary aeration disc of every circle is made up of two semicircular feature.Every pair of semicircular feature is striden and is worn transverse axis, forms whole disk, and each video disc can independent dismounting, is convenient to regulate packing density, makes complete machine reach required oxygenation capacity, and every meter axial length is generally adorned 3～5 of video discs; Video disc adopts glass reinforced plastic die casting or adopts the polyphenyl material injection molded, and its surface is furnished with trapezoidal projection, has the function that oxygen supply and plug-flow stir concurrently; Transverse axis adopts the thick-walled seamless steel pipes manufacturing, and the surface is made special anticorrosive and handled; Step-down gear and motor are formed drive unit and are driven the rotary aeration disc rotation.
By the open degree of manual regulation internal reflux control gate, can reach the purpose of control mixed solution internal reflux.Do not need extra power consumption.
Can cooperate simultaneously and open the quantity of underwater scooter under water according to the unlatching quantity of the changing conditions PLC automatic control plate-spinning aerator of dissolved oxygen on-line monitoring instrument in the oxidation ditch in the use, reach the purpose of conserver power source.The depth of immersion of plate-spinning is 1/3 of a plate-spinning diameter during installation.
Manual regulation weir gate by rising pipe can the water outlet of manual regulation controlled oxidation ditch.
The volume of concrete each anaerobic zone, oxygen-starved area, aerobic zone can draw according to the come discharge and the residence time of actual treatment.
In the reality, also can build each reaction tank of the oxidation channel wastewater treatment system in the embodiment of the invention jointly integrated structure, make oxidation ditch not need extra pipeline like this, damage by water is little, and the simple operations by the backflow control gate simultaneously can in time realize the distribution of returned sluge between the different process unit.
The concrete parameter of the oxidation channel wastewater treatment system in the reality in the embodiment of the invention can see table
| Project | Processing parameter |
| The BOD sludge loading | 0.08kgBOD/(kgMLSS.d) |
| Sludge concentration | 4g/L |
| Sludge age | 15d |
| Hydraulic detention time HRT | Anaerobism 1h, anoxic 1.5h, aerobic 5h |
| Return sludge ratio | 100％ |
| Mixed solution is in ditch internal recycle speed | 0.3m/s |
| Available depth | 4-5m |
| Single ditch width | 6-7m |
| The plate-spinning aerator | φ 1.40m, rotating speed 50r/min |
| Maximum internal reflux ratio | 100％ |
In sum, among the utility model embodiment by before the anoxic pond of oxidation channel wastewater treatment system, anaerobic pond being set, and rotary-cut eddy current post-type mixer is set in anaerobic pond, the plate-spinning aerator is set in Aerobic Pond, after assurance is carried out anaerobic treatment earlier to water inlet, in Aerobic Pond, carry out high efficient aeration, effectively guaranteed effect water conditioning by the plate-spinning aerator.This oxidation channel wastewater treatment system has that effluent quality is good, the impact load that can bear the water yield and water quality, dephosphorization removing nitric efficiency height, mud are easily stable, the plate-spinning aerator cooperates with underwater scooter in the saving energy, Aerobic Pond, is convenient to advantages such as automatization control.
This system is owing to be provided with anaerobic pond before anoxic pond, make this system be applicable to the processing high concentrated organic wastewater, the municipal sewage plant of various scales, be particularly useful for to denitrogenation have relatively high expectations in large-scale municipal sewage plant, water outlet can reach 1 grade of B standard of state sewage emission standard, has environmental benefit, social benefit preferably.
The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (10)
1, a kind of improvement oxidation channel wastewater treatment system is characterized in that, this system comprises:
Anaerobic pond, distributing well, anoxic pond, Aerobic Pond, rotary-cut eddy current post-type mixer, plate-spinning aerator and underwater scooter;
Water-in on the described anaerobic pond is connected with the distributing well that is provided with water inlet pipe and mud return line, be provided with rotary-cut eddy current post-type mixer in the described anaerobic pond, the water outlet of anaerobic pond is communicated with the formation oxidation ditch successively with the annular flow channel of anoxic pond, Aerobic Pond inside, be equipped with underwater scooter in described anoxic pond, the Aerobic Pond, also be provided with the plate-spinning aerator in the described Aerobic Pond.
2, improvement oxidation channel wastewater treatment system according to claim 1 is characterized in that, described plate-spinning aerator is many, is uniformly set in the annular flow channel in the described Aerobic Pond.
3, oxidation channel wastewater treatment system according to claim 1 and 2 is characterized in that, described plate-spinning aerator is made of rotary aeration disc, transverse axis, rolling bearing and drive unit; Described transverse axis is arranged on the rolling bearing of bearing support, and transverse axis is connected with drive unit, and rotary aeration disc is made up of two semicircular feature, is arranged on the transverse axis after two semicircular feature are combined into rotary aeration disc.
4, oxidation channel wastewater treatment system according to claim 3 is characterized in that, uniform distribution is provided with 3～5 rotary aeration discs on the transverse axis of described each Mi Changdu.
5, oxidation channel wastewater treatment system according to claim 3 is characterized in that, described aerating disc is for adopting glass reinforced plastic die casting or adopting the injection molded surface of polyphenyl material to be furnished with the aerating disc of trapezoidal projection.
6, oxidation channel wastewater treatment system according to claim 3 is characterized in that, described drive unit is made of step-down gear and electric motor, and step-down gear is arranged on the power output shaft of electric motor.
7, improvement oxidation channel wastewater treatment system according to claim 3, it is characterized in that, underwater scooter in the described Aerobic Pond is many, corresponding with many plate-spinning aerators in the Aerobic Pond respectively, in the annular flow channel in the Aerobic Pond of each plate-spinning aerator back underwater scooter is set all.
According to claim 1,2 or 3 described improvement oxidation channel wastewater treatment systems, it is characterized in that 8, described underwater scooter adopts PS series underwater scooter.
9, improvement oxidation channel wastewater treatment system according to claim 1 is characterized in that, described anaerobic pond inside is square structure, and described rotary-cut eddy current post-type mixer is arranged on the middle part in the anaerobic pond.
10, according to claim 1 or 9 described improvement oxidation channel wastewater treatment systems, it is characterized in that the pipeline that described anoxic pond is connected with described Aerobic Pond is provided with the internal reflux control gate.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201246780U CN201325908Y (en) | 2008-12-17 | 2008-12-17 | Improved sewage treatment system for oxidation ditch |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201246780U CN201325908Y (en) | 2008-12-17 | 2008-12-17 | Improved sewage treatment system for oxidation ditch |
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| CN201325908Y true CN201325908Y (en) | 2009-10-14 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502962A (en) * | 2011-11-03 | 2012-06-20 | 安徽国祯环保节能科技股份有限公司 | Method and device for controlling synchronous nitration and denitrification in surface aeration oxidation ditch process |
| CN102557199A (en) * | 2010-12-14 | 2012-07-11 | 上海洗霸科技股份有限公司 | Micro-electrolytic reactor |
| CN102795706A (en) * | 2012-02-17 | 2012-11-28 | 华东理工大学 | Advanced treatment method of nitrate-containing water |
| CN104710010A (en) * | 2015-04-01 | 2015-06-17 | 武汉理工大学 | Real-time AAO oxidation ditch regulation system and sewage treatment method thereof |
| CN107337276A (en) * | 2017-08-28 | 2017-11-10 | 广州鹏锦环保科技有限公司 | Efficient integrated circulates baffling ditch |
| CN108059244A (en) * | 2017-12-26 | 2018-05-22 | 绍兴水处理发展有限公司 | A kind of energy-efficient coupling oxidation ditch denitrification process |
| CN110117072A (en) * | 2019-06-13 | 2019-08-13 | 江苏锦宇环境工程有限公司 | A kind of bottom aerated oxidation ditch synchronous nitration and denitrification process unit |
| CN110182951A (en) * | 2019-05-31 | 2019-08-30 | 凌志环保股份有限公司 | Horizontal integrated A/O oxidation ditch tank |
| CN113603314A (en) * | 2021-09-22 | 2021-11-05 | 福州大学 | Tank type integrated sewage treatment device and operation method thereof |
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2008
- 2008-12-17 CN CNU2008201246780U patent/CN201325908Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557199A (en) * | 2010-12-14 | 2012-07-11 | 上海洗霸科技股份有限公司 | Micro-electrolytic reactor |
| CN102502962A (en) * | 2011-11-03 | 2012-06-20 | 安徽国祯环保节能科技股份有限公司 | Method and device for controlling synchronous nitration and denitrification in surface aeration oxidation ditch process |
| CN102795706A (en) * | 2012-02-17 | 2012-11-28 | 华东理工大学 | Advanced treatment method of nitrate-containing water |
| CN104710010A (en) * | 2015-04-01 | 2015-06-17 | 武汉理工大学 | Real-time AAO oxidation ditch regulation system and sewage treatment method thereof |
| CN104710010B (en) * | 2015-04-01 | 2015-09-30 | 武汉理工大学 | A kind of AAO oxidation ditch real-time monitoring system and sewage water treatment method thereof |
| CN107337276A (en) * | 2017-08-28 | 2017-11-10 | 广州鹏锦环保科技有限公司 | Efficient integrated circulates baffling ditch |
| CN108059244A (en) * | 2017-12-26 | 2018-05-22 | 绍兴水处理发展有限公司 | A kind of energy-efficient coupling oxidation ditch denitrification process |
| CN110182951A (en) * | 2019-05-31 | 2019-08-30 | 凌志环保股份有限公司 | Horizontal integrated A/O oxidation ditch tank |
| CN110182951B (en) * | 2019-05-31 | 2024-02-27 | 凌志环保股份有限公司 | Horizontal integrated A/O oxidation ditch tank |
| CN110117072A (en) * | 2019-06-13 | 2019-08-13 | 江苏锦宇环境工程有限公司 | A kind of bottom aerated oxidation ditch synchronous nitration and denitrification process unit |
| CN113603314A (en) * | 2021-09-22 | 2021-11-05 | 福州大学 | Tank type integrated sewage treatment device and operation method thereof |
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