CN102153239A - Process and system for carrying out high-efficiency denitrification and dephosphorization treatment on urban sewage - Google Patents
Process and system for carrying out high-efficiency denitrification and dephosphorization treatment on urban sewage Download PDFInfo
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Abstract
The invention belongs to the technical field of sewage treatment and particularly relates to a process and a system for carrying out high-efficiency denitrification and dephosphorization treatment on urban sewage. The process for carrying out high-efficiency denitrification and dephosphorization treatment on the urban sewage is characterized in that the process comprises the following steps that the pretreated urban sewage directly enters an anaerobic tank to be subjected to anaerobic hydrolysis; then the obtained product enters an anoxic tank and an aerobic tank to be subjected to denitrification, nitration and aerobic biodegradation; and finally the product enters a sedimentation tank to be subjected to solid-liquid separation and then is discharged. The process integrates anaerobic treatment, anoxic treatment and aerobic treatment into one whole body. The organisms, nitrogen and phosphorus are removed by a biochemical reaction principle. The system for carrying out high-efficiency denitrification and dephosphorization treatment on the urban sewage has a simple structure and a reduced occupied area.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to a kind of treatment process and treatment system thereof of municipal effluent high-efficient denitrification and dephosphorization.
Background technology
Along with the quickening of Chinese industrial process, problem of environmental pollution is more and more outstanding, and the particularly excessive sewage that is rich in nitrogen, phosphorus continues to enter water body, will stimulate the hypertrophy of aquatic plant and algae, causes body eutrophication.Cause oxygen in water to fall sharply, fish kill, the water quality serious degradation, and then make the fresh water water body that " wawter bloom ", i.e. body eutrophication take place.Eutrophication can influence the water quality of water body, can cause the transparency of water to reduce, and make sunlight be difficult to penetrate water layer, thereby influence the photosynthesis of aquatic plant, thereby also just reduces thereupon in the source of dissolved oxygen.Secondly, constantly rot after the algae death of lake to decompose, also can consume the dissolved oxygen of swallow, may make the dissolved oxygen depletion of swallow totally be anaerobic state when serious, make aerobiont be difficult to existence.This anaerobic state can trigger or quicken the release of the nutritive substance of bed mud accumulation, causes the high loading of water nutrition material, forms the vicious cycle of eutrophic water body.
Exceeding standard of nitrogen and phosphorus element content is the major reason that causes body eutrophication in the water body, sewage disposal is not up to standard and body eutrophication problem that direct discharging causes is more and more serious, body eutrophication becomes the common difficulty that countries in the world are faced, thereby to sewage emissions standard meeting increasingly stringent, the continuous development of sewage disposal technology is the important assurance that addresses this problem.
For the original just very short country of water resources in china, strict control is nitrogenous, the discharging that exceeds standard of phosphorus sewage is very necessary.Process for removing nitrogen and phosphor from sewage mainly is divided into biological process and chemical method two big classes at present, compares with the chemical method denitrification dephosphorization technique, and the biological carbon and phosphorous removal technology has very strong advantage, becomes the focus of current research.
The sewage treatment process of prior biological denitrogenation dephosphorizing is many with A/O, A
2/ O and oxidation ditch process are main, and production practice are widely used, and technology is also comparatively ripe, but it still has not ideal enough part, and bigger as design capacity, processing power is low relatively, and has increased floor space and investment.In addition, under water quality and quantity variation situation greatly, be difficult to guarantee the denitrogenation dephosphorizing degree of depth stably in the actual production.At present, with A/O, A
2/ O technology, oxidation ditch process is in the basic serial denitrification dephosphorization technique of being developed, and most of technologies all need mud and mixed solution to reflux simultaneously, do not reach purpose of energy saving, also are difficult to improve simultaneously the effect of denitrogenation and dephosphorization.
Summary of the invention
The object of the present invention is to provide a kind of treatment process and treatment system thereof of municipal effluent high-efficient denitrification and dephosphorization, this technology is based on anaerobism, anoxic and aerobic in one, remove organism and denitrogenation dephosphorizing with the biochemical reaction principle, treatment system simple in structure reduces floor space.
For achieving the above object, the technical solution used in the present invention is: a kind of treatment process of municipal effluent high-efficient denitrification and dephosphorization, it is characterized in that it comprises the steps: that directly entering anaerobic pond through pretreated municipal effluent (waste water) carries out anaerobic hydrolysis, enter then and carry out denitrification, nitrated and biology aerobic degraded in anoxic pond and the Aerobic Pond; Entering settling tank at last carries out discharging after the solid-liquid separation.
The treatment process of aforesaid a kind of municipal effluent high-efficient denitrification and dephosphorization is provided with the immersion agitator at anaerobic pond and anoxic pond.
The treatment process of aforesaid a kind of municipal effluent high-efficient denitrification and dephosphorization, be provided for the floating stuffing of good attachment oxygen animalcule (biofilm) at Aerobic Pond, filler is the multiaspect hollow ball (proportion 0.9～1.2) that igelite is processed into, the diameter of multiaspect hollow ball is 20～100mm, and the stacking volume that adds floating stuffing (carrier) accounts for 20%～40% of Aerobic Pond useful volume.
The treatment process of aforesaid a kind of municipal effluent high-efficient denitrification and dephosphorization, the main operating parameter of this technology is as follows:
Sludge loading: 0.08～0.18[kgBOD
5/ kgMLSSd],
Sludge concentration: 3000～6000mg/L,
Hydraulic detention time: T=6～10 hour,
The residence time distributes: anaerobic pond: anoxic pond: Aerobic Pond=1: 1.5: 2.5,
Anaerobic pond dissolved oxygen DO≤0.2mg/L,
Dissolved oxygen in anoxic tank DO≤0.5mg/L,
Aerobic Pond dissolved oxygen DO=1.5～2.0mg/L,
Mud age: 10～15 days,
Return sludge ratio: 50%～100%.
A kind of treatment system that realizes the municipal effluent high-efficient denitrification and dephosphorization of aforesaid method is characterized in that it comprises sewage conveying tube 1, anaerobic pond 2, settling tank 3, Aerobic Pond 7, anoxic pond agitator 9, anoxic pond 10, dividing plate 11, aeration head 12, shore pipe 14, sludge reflux pump 15, anaerobic pond agitator 16, mud return line 17; The input termination of sewage conveying tube 1 is through pretreated municipal effluent (waste water), and the output terminal of sewage conveying tube 1 is connected with the input aperture of anaerobic pond 2, is provided with anaerobic pond agitator 16 in the anaerobic pond 2; The bottom of anaerobic pond 2 is connected by the bottom of communicating aperture 13 with anoxic pond 10, be provided with anoxic pond agitator 9 in the anoxic pond 10, Aerobic Pond 7 is positioned at the top of anoxic pond 10, separate by dividing plate 11 between Aerobic Pond 7 and the anoxic pond 10 that (dividing plate 11 is fixed on the Chi Tishang of anoxic pond 10, Aerobic Pond 7 is structure as a whole with anoxic pond 10), the circulatory flow 8 that makes the unimpeded round-robin first band woven wire of water is left at the dividing plate two ends respectively, (Aerobic Pond 7 is by the circulatory flow 8 of the first band woven wire for the circulatory flow 18 of the second band woven wire, the circulatory flow 18 of the second band woven wire is connected with anoxic pond 10); Be provided with aeration tube and aeration head 12 in the bottom of Aerobic Pond 7, aeration head 12 is arranged on the aeration tube, aeration tube is connected with compressed air pipe 6, is provided with floating stuffing 5 in the Aerobic Pond 7, and the top of Aerobic Pond 7 is connected with the top of settling tank 3 by the Aerobic Pond outlet passage 4 of band woven wire; The bottom of settling tank 3 is connected with the input terminus of shore pipe 14, shore pipe 14 is provided with mud valve, the input terminus of mud return line 17 links to each other with shore pipe 14, the output terminal of mud return line 17 is connected with the input aperture of anaerobic pond 2, mud return line 17 is provided with sludge reflux pump 15, and the upper end of settling tank 3 is provided with overflow weir (supernatant liquor of settling tank 3 discharges by overflow weir as the water after handling).
Described floating stuffing is the multiaspect hollow ball (proportion 0.9～1.2) that igelite is processed into, and the diameter of multiaspect hollow ball is 20～100mm.
Described anaerobic pond 2, settling tank 3, Aerobic Pond 7 and anoxic pond 10 are positioned at structures.
Advantage of the present invention:
1) this technology is removed organism and denitrogenation dephosphorizing based on anaerobism, anoxic and aerobic in one with the biochemical reaction principle.
2) above-mentioned treatment system is simple in structure, and four ponds such as anaerobism, anoxic, aerobic, precipitation are separated to form and are interconnected in structures, reduce floor space greatly.
3) Aerobic Pond is provided with floating stuffing, for microorganism provides large-area habitat, these fillers are in fluidized state in operational process, make pollutent and extensive and frequent the contacting of the microbial film on the filler, improved mass-transfer efficiency greatly, the filler that is in fluidized simultaneously can be cut into air pocket countless small bubbles or micro-bubble, strengthened the contact area of gas-liquid, improved the transfer rate of oxygen, can reduce mud age effectively, under the condition of keeping the good biological denitrification effect, further improve the dephosphorization ability of system.
4) cancelled the mixed-liquor return pump that traditional technology is used, the substitute is agitator under water, this equipment simple is saved energy consumption.
5) equipment that needs of the present invention is few, and structures are simple, and flexible operation can be according to the variation of flooding quantity and water quality, by adjusting aeration, stirring under water and the mud backflow waits and satisfies the effluent quality requirement.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Among the figure: the 1-sewage conveying tube; The 2-anaerobic pond; The 3-settling tank; 4-Aerobic Pond outlet passage (band woven wire); The 5-floating stuffing; The 6-compressed air pipe; The 7-Aerobic Pond; The circulatory flow of the 8-first band woven wire; 9-anoxic pond agitator; The 10-anoxic pond; The 11-dividing plate; The 12-aeration head; The 13-communicating aperture; The 14-shore pipe; The 15-sludge reflux pump; 16-anaerobic pond agitator; The 17-mud return line, the circulatory flow of the 18-second band woven wire.
Embodiment
As shown in Figure 1, a kind of treatment process of municipal effluent high-efficient denitrification and dephosphorization, it comprises the steps: that directly entering anaerobic pond through pretreated municipal effluent (waste water) carries out anaerobic hydrolysis, enters then to carry out denitrification, nitrated and biology aerobic degraded in anoxic pond and the Aerobic Pond; Entering settling tank at last carries out discharging after the solid-liquid separation.
Described pre-treatment is: with grid interception floating matter and settling pit to pre-treatment such as part inorganic suspended particles thing in the municipal effluent precipitate.
Described municipal effluent (Municipal Waste Water) is meant: the general designation that enters the sewage of town sewage system.In combined drainage system, also comprise factory effluent and the rainwater of holding back.Municipal effluent mainly comprises sanitary sewage and industrial sewage, is compiled and is transported to sewage work by urban drainage pipe network and handle.
The treatment process of aforesaid a kind of municipal effluent high-efficient denitrification and dephosphorization is divided into four ponds that are closely connected mutually, i.e. anaerobic pond, anoxic pond, Aerobic Pond and settling tank in its whole structures.Wherein anaerobic pond and settling tank are two ponds independently, are not communicated with mutually, between anaerobic pond and the anoxic pond communicating aperture are arranged, and anoxic pond and Aerobic Pond are as a whole, and dividing plate is divided into two parts up and down with this integral body, and top is Aerobic Pond, and the bottom is an anoxic pond.The two ends of dividing plate closely are connected with the anoxic pond inner side-wall respectively, leave respectively at the dividing plate two ends to make the unimpeded round-robin runner of water.
The treatment process of aforesaid a kind of municipal effluent high-efficient denitrification and dephosphorization is provided with the immersion agitator at anaerobic pond and anoxic pond, and it is to allow returned sluge and the reaction of sewage thorough mixing that the agitator of anaerobic pond mainly acts on, and prevents sludgd deposition; The agitator of anoxic pond promotes the mixing of mixed solution between anoxic pond and Aerobic Pond, mass transfer.The installation site of agitator, setting angle and stirring velocity can be regulated, so that reach the ideal working order.
The treatment process of aforesaid a kind of municipal effluent high-efficient denitrification and dephosphorization, be provided with aeration tube in Aerobic Pond bottom and aeration head carries out gas distribution, air compressor machine carries out aeration, aeration rate is controlled by air flowmeter, set up the floating stuffing that is used for good attachment oxygen animalcule (biofilm) at Aerobic Pond, filler is the multiaspect hollow ball (proportion 0.9～1.2) that igelite is processed into, and diameter is 20～100mm, and the stacking volume that adds floating stuffing (carrier) accounts for 20%～40% of Aerobic Pond useful volume.For preventing that the floating stuffing in the Aerobic Pond runs off, on the circulatory flow at the dividing plate two ends between Aerobic Pond and the anoxic pond, be provided with woven wire, prevent that floating stuffing from falling anoxic pond; The Aerobic Pond outlet passage of while between Aerobic Pond and settling tank also is provided with woven wire and is used to prevent that floating stuffing from flowing to settling tank.
The treatment process of aforesaid a kind of municipal effluent high-efficient denitrification and dephosphorization is provided with shore pipe in the settling tank bottom, by sludge reflux pump a part of mud is back to anaerobic pond and mixes with water inlet, and another part excess sludge effluxes.
The treatment process of aforesaid a kind of municipal effluent high-efficient denitrification and dephosphorization, the main operating parameter of this technology is as follows:
Sludge loading: 0.08～0.18[kgBOD
5/ kgMLSSd],
Sludge concentration: 3000～6000mg/L,
Hydraulic detention time: T=6～10 hour,
The residence time distributes: anaerobic pond: anoxic pond: Aerobic Pond=1: 1.5: 2.5,
Anaerobic pond dissolved oxygen DO≤0.2mg/L,
Dissolved oxygen in anoxic tank DO≤0.5mg/L,
Aerobic Pond dissolved oxygen DO=1.5～2.0mg/L,
Mud age: 10～15 days,
Return sludge ratio: 50%～100%.
A kind of treatment system that realizes the municipal effluent high-efficient denitrification and dephosphorization of aforesaid method, it comprises sewage conveying tube 1, anaerobic pond 2, settling tank 3, Aerobic Pond 7, anoxic pond agitator 9, anoxic pond 10, dividing plate 11, aeration head 12, shore pipe 14, sludge reflux pump 15, anaerobic pond agitator 16, mud return line 17; The input termination of sewage conveying tube 1 is through pretreated municipal effluent (waste water), and the output terminal of sewage conveying tube 1 is connected with the input aperture of anaerobic pond 2, is provided with anaerobic pond agitator 16 in the anaerobic pond 2; The bottom of anaerobic pond 2 is connected by the bottom of communicating aperture 13 with anoxic pond 10, be provided with anoxic pond agitator 9 in the anoxic pond 10, Aerobic Pond 7 is positioned at the top of anoxic pond 10, separate by dividing plate 11 between Aerobic Pond 7 and the anoxic pond 10 that (dividing plate 11 is fixed on the Chi Tishang of anoxic pond 10, Aerobic Pond 7 is structure as a whole with anoxic pond 10), the circulatory flow 8 that makes the unimpeded round-robin first band woven wire of water is left at the dividing plate two ends respectively, (Aerobic Pond 7 is by the circulatory flow 8 of the first band woven wire for the circulatory flow 18 of the second band woven wire, the circulatory flow 18 of the second band woven wire is connected with anoxic pond 10); Be provided with aeration tube and aeration head 12 in the bottom of Aerobic Pond 7, aeration head 12 is arranged on the aeration tube, aeration tube is connected with compressed air pipe 6, is provided with floating stuffing 5 in the Aerobic Pond 7, and the top of Aerobic Pond 7 is connected with the top of settling tank 3 by the Aerobic Pond outlet passage 4 of band woven wire; The bottom of settling tank 3 is connected with the input terminus of shore pipe 14, shore pipe 14 is provided with mud valve, the input terminus of mud return line 17 links to each other with shore pipe 14, the output terminal of mud return line 17 is connected with the input aperture of anaerobic pond 2, mud return line 17 is provided with sludge reflux pump 15, and the upper end of settling tank 3 is provided with overflow weir (supernatant liquor of settling tank 3 discharges by overflow weir as the water after handling).
1, anaerobic pond:
By sewage conveying tube 1 input anaerobic pond (anaerobic reation pool) 2, the precipitating sludge of settling tank 3 bottoms is discharged by shore pipe 14 simultaneously through pretreated waste water.The input terminus of mud return line 17 links to each other with shore pipe 14, the output terminal of mud return line 17 is connected with the input aperture of anaerobic pond 2, mud return line 17 is provided with sludge reflux pump 15, and partly precipitated mud is imported anaerobic ponds 2 through the lifting of sludge reflux pump 15 by mud return line 17.For returned sluge can mix rapidly fully with water inlet, prevent from sludgd deposition to take place at anaerobic pond 2, be provided with anaerobic pond agitator 16 in the bottom of anaerobic pond 2 and stir.Anaerobic pond under anaerobic moves, organism fully reacts in microorganism in the returned sluge and the sewage, macromolecular hardly degraded organic substance anaerobic hydrolysis in the water is become the organism of the little readily biodegradable of molecular weight, and it is movable and put aside the power of follow-up suction phosphorus that the mud of Hui Liuing carries out anaerobic phosphorus release simultaneously.
2, anoxic pond
Water after handling through anaerobic pond 2 enters anoxic pond 10 by communicating aperture 13, and anoxic pond 10 is moved under anoxia condition, and the nitrate in the waste water is carried out denitrification, is converted into gaseous nitrogen and disengages.Its nitric nitrogen is sent here by circulatory flow 18 by Aerobic Pond 7 by internal recycle.The oxygen of anoxic pond 10 maintains low-level down operation, and denitrifying bacterium utilizes oxygen in the nitrate as electron acceptor(EA) under the extremely low environment of dissolved oxygen concentration, and the organic carbon compound provides energy and obtains oxidation-stabilized as carbon source and electron donor.Hybrid propulsion effect by anoxic pond agitator 9 in anoxic pond 10 makes anoxic pond 10 and the Aerobic Pond 7 formation internal recycle of communicating with each other.Promote the nitrification and denitrification reaction in these two ponds (anoxic pond 10 and Aerobic Pond 7), reach the purpose of biological denitrificaion.
3, Aerobic Pond
Mixed solution enters Aerobic Pond 7 from anoxic pond 10, the function of Aerobic Pond 7 is: mixed solution has been oxygen condition in the Aerobic Pond 7, organism obtains degraded under the aerobic microbiological effect, floating stuffing 5 add the microbial biomass that can increase Aerobic Pond 7, make the microorganism of existing suspension growth in the Aerobic Pond 7, the microorganism of fixed growth is arranged again.When Aerobic Pond 7 works better, under the aeration effect of aeration head 12, floating stuffing 5 is fluidized in Aerobic Pond, bubble is risen by the bottom, passes from the filler space, air pocket is cut into countless small bubbles or micro-bubble, strengthen the contact area of gas-liquid, improved the transfer rate of oxygen, effectively promoted organic degraded in the sewage, make just the ammonia nitrogen in the water can be oxidized to nitric nitrogen (nitrate nitrogen or nitrite nitrogen) its within a short period of time, realize good nitrification effect.Meanwhile, polyP bacteria absorbs phosphorus in a large number at this reaction zone, and the phosphorus in the waste water is effectively removed.
4, settling tank
Mixed solution in the Aerobic Pond 7 enters settling tank 3 by the Aerobic Pond outlet passage (band woven wire) 4 on its top, and the function of settling tank 3 is mud-water separation, and a precipitating sludge part is back to anaerobic pond 2, and another part is as excess sludge discharge.The supernatant liquor of settling tank 3 discharges by overflow weir as the water after handling.
5, operation control
(1) Aerobic Pond 7 is provided with dissolved oxygen meter and carries out online detection,, make the dissolved oxygen of Aerobic Pond 7 maintain the level of technique initialization by the keying and the air demand of computer regulating gas blower;
(2) keying of the diving mixer 9 by computer control anoxic pond 10 promotes mixing of mixed solution between anoxic pond 10 and the Aerobic Pond 7, and mass transfer is adjusted the mixed solution internal circulating load, realizes the nitrification and denitrification function in two ponds.
(3) also to control the start and stop of sludge reflux pump 15 by computer system to the mud return-flow system of settling tank 3, keep the mixed solution sludge concentration in each pond by adjusting return sludge ratio.
Total system is according to influent quality and effluent quality requirement, and selected each processing parameter is controlled by the software that designs in advance then, and this technology is to COD in the city domestic sewage
CrClearance can reach more than 90%; To BOD
5Clearance can reach more than 95%; All can reach more than 80% TN and TP clearance.
Claims (7)
1. the treatment process of a municipal effluent high-efficient denitrification and dephosphorization, it is characterized in that it comprises the steps: that directly entering anaerobic pond through pretreated municipal effluent carries out anaerobic hydrolysis, enter then and carry out denitrification, nitrated and biology aerobic degraded in anoxic pond and the Aerobic Pond; Entering settling tank at last carries out discharging after the solid-liquid separation.
2. the treatment process of a kind of municipal effluent high-efficient denitrification and dephosphorization according to claim 1 is characterized in that: be provided with the immersion agitator at anaerobic pond and anoxic pond.
3. the treatment process of a kind of municipal effluent high-efficient denitrification and dephosphorization according to claim 1, it is characterized in that: the floating stuffing that is provided for the good attachment oxygen animalcule at Aerobic Pond, filler is the multiaspect hollow ball that igelite is processed into, the diameter of multiaspect hollow ball is 20～100mm, and the stacking volume that adds floating stuffing accounts for 20%～40% of Aerobic Pond useful volume.
4. the treatment process of a kind of municipal effluent high-efficient denitrification and dephosphorization according to claim 1 is characterized in that: the main operating parameter of described treatment process is as follows:
Sludge loading: 0.08～0.18[kgBOD
5/ kgMLSSd],
Sludge concentration: 3000～6000mg/L,
Hydraulic detention time: T=6～10 hour,
The residence time distributes: anaerobic pond: anoxic pond: Aerobic Pond=1: 1.5: 2.5,
Anaerobic pond dissolved oxygen DO≤0.2mg/L,
Dissolved oxygen in anoxic tank DO≤0.5mg/L,
Aerobic Pond dissolved oxygen DO=1.5～2.0mg/L,
Mud age: 10～15 days,
Return sludge ratio: 50%～100%.
5. realize the treatment system of the municipal effluent high-efficient denitrification and dephosphorization of the described method of claim 1, it is characterized in that it comprises sewage conveying tube (1), anaerobic pond (2), settling tank (3), Aerobic Pond (7), anoxic pond agitator (9), anoxic pond (10), dividing plate (11), aeration head (12), shore pipe (14), sludge reflux pump (15), anaerobic pond agitator (16), mud return line (17); The input termination of sewage conveying tube (1) is through pretreated municipal effluent, and the output terminal of sewage conveying tube (1) is connected with the input aperture of anaerobic pond (2), is provided with anaerobic pond agitator (16) in the anaerobic pond (2); The bottom of anaerobic pond (2) is connected by the bottom of communicating aperture (13) with anoxic pond (10), be provided with anoxic pond agitator (9) in the anoxic pond (10), Aerobic Pond (7) is positioned at the top of anoxic pond (10), separated by dividing plate (11) between Aerobic Pond (7) and the anoxic pond (10), the dividing plate two ends are left the circulatory flow (8) of the first band woven wire, the circulatory flow (18) of the second band woven wire respectively; Be provided with aeration tube and aeration head (12) in the bottom of Aerobic Pond (7), aeration head (12) is arranged on the aeration tube, aeration tube is connected with compressed air pipe (6), be provided with floating stuffing (5) in the Aerobic Pond (7), the top of Aerobic Pond (7) is connected with the top of settling tank (3) by the Aerobic Pond outlet passage (4) of band woven wire; The bottom of settling tank (3) is connected with the input terminus of shore pipe (14), shore pipe (14) is provided with mud valve, the input terminus of mud return line (17) links to each other with shore pipe (14), the output terminal of mud return line (17) is connected with the input aperture of anaerobic pond (2), mud return line (17) is provided with sludge reflux pump (15), and the upper end of settling tank (3) is provided with overflow weir.
6. the treatment system of municipal effluent high-efficient denitrification and dephosphorization according to claim 5 is characterized in that: described floating stuffing is the multiaspect hollow ball that igelite is processed into, and the diameter of multiaspect hollow ball is 20～100mm.
7. the treatment system of municipal effluent high-efficient denitrification and dephosphorization according to claim 5 is characterized in that: described anaerobic pond (2), settling tank (3), Aerobic Pond (7) and anoxic pond (10) are positioned at structures.
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| CN102381763A (en) * | 2011-09-29 | 2012-03-21 | 佛山市邦普循环科技有限公司 | Device and method for treating ammonia nitrogen wastewater by using dioxygen biological filler |
| CN103241897A (en) * | 2013-05-02 | 2013-08-14 | 江苏瑞盛水处理有限公司 | Integrated water-treatment device |
| CN103435216A (en) * | 2013-08-07 | 2013-12-11 | 蚌埠市清泉环保有限责任公司 | Integrated sewage treatment reaction device |
| CN105036466A (en) * | 2015-07-13 | 2015-11-11 | 广西博世科环保科技股份有限公司 | B-circulating fluidized bed aerobic system |
| CN105174454A (en) * | 2015-09-11 | 2015-12-23 | 王海英 | Integrated nitrogen and phosphorus removal sewage treatment device |
| CN106186319A (en) * | 2016-08-12 | 2016-12-07 | 江苏艾特克环境工程设计研究院有限公司 | A kind of industrial wastewater denitrogenation dephosphorizing desulfurization apparatus based on new packing and processing method |
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| CN109279694A (en) * | 2018-10-10 | 2019-01-29 | 浙江博华环境技术工程有限公司 | A kind of the high-efficient denitrification and dephosphorization device and process of the compound IFAS technology of multistage AO |
| CN114524516A (en) * | 2022-02-28 | 2022-05-24 | 四川美富特环境治理有限责任公司 | Biochemical reactor and sewage treatment method |
| CN114524515A (en) * | 2022-02-28 | 2022-05-24 | 四川美富特环境治理有限责任公司 | Sewage treatment system and sewage treatment method |
| CN116332353A (en) * | 2023-05-01 | 2023-06-27 | 山东绿立冠环保科技有限公司 | Sewage treatment process for high-efficiency denitrification and dephosphorization |
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