CN203593662U - Sewage denitrifying treatment device through alternatively multi-point water inflowing and multi-layer composite filler filling - Google Patents
Sewage denitrifying treatment device through alternatively multi-point water inflowing and multi-layer composite filler filling Download PDFInfo
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- CN203593662U CN203593662U CN201320609733.6U CN201320609733U CN203593662U CN 203593662 U CN203593662 U CN 203593662U CN 201320609733 U CN201320609733 U CN 201320609733U CN 203593662 U CN203593662 U CN 203593662U
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- sewage
- reactor body
- oxygen
- aerobic zone
- composite filler
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000010865 sewage Substances 0.000 title claims abstract description 48
- 239000000945 filler Substances 0.000 title claims abstract description 18
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- 238000005276 aerator Methods 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims description 19
- 239000002699 waste material Substances 0.000 claims description 12
- 238000012856 packing Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 239000010802 sludge Substances 0.000 abstract description 6
- 238000005192 partition Methods 0.000 abstract 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 15
- 229910052799 carbon Inorganic materials 0.000 description 15
- 238000000034 method Methods 0.000 description 15
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 10
- 230000015556 catabolic process Effects 0.000 description 8
- 238000006731 degradation reaction Methods 0.000 description 8
- 241000894006 Bacteria Species 0.000 description 7
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 6
- 230000000813 microbial effect Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004176 ammonification Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 239000002028 Biomass Substances 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 241000108664 Nitrobacteria Species 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 241001495402 Nitrococcus Species 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 206010002660 Anoxia Diseases 0.000 description 1
- 241000976983 Anoxia Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 230000007953 anoxia Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
A sewage denitrifying treatment device through alternatively multi-point water inflowing and multi-layer composite filler filling comprises a reactor body with a filler layer, a sewage inlet pipe connected with a water inlet pump, an air pump and a controller, wherein the interior of the reactor body is divided into a plurality of reaction chambers by first vertical partition boards and second vertical partition boards that are arranged at intervals; a gap is reserved between the bottom end of each first vertical partition board and the bottom of the reactor body; a gap is reserved between the upper end of each second vertical partition board and the upper part of the reactor body; each reaction chamber comprises an aerobic zone and an anoxic zone that are arranged at an interval; aerators are arranged at the bottoms of the aerobic zones and the anoxic zones; water outlets are formed in two ends of the reactor body; the upper ends of the reaction chambers are provided with sewage inlets; a sewage inlet pipe is communicated with the reaction chambers through branch pipelines to form a multi-point water inflow structure; the air pump is communicated with air inlets of all the aerators respectively; the controller is connected with the water inlet pump and the aerators. The device has the benefits of improving the denitrification effect and reducing sludge to the greatest degree.
Description
Technical field
The utility model relates to a kind of multipoint water feeding alternate run MULTILAYER COMPOSITE filler denitrogenation waste disposal plant.
Background technology
Along with the reinforcement of day by day serious and people's environmental consciousness of nitrate pollution, denitride technology has caused countries in the world common concern.And the feature that biological denitrificaion is simple with its technique, operation and maintenance cost is low is widely used in the treatment process of city and trade effluent.Therefore wastewater biological denitrificaion becomes a main direction of water pollution control.
Tradition A/O technique is one of municipal effluent biological denitrification process extensively adopting, and principal feature is that denitrification reactor is placed on to system foremost.Tradition A/O biological denitrificaion flow process is as follows: first former water enter anoxic section, utilizes organic carbon in former water as electron donor, carries out denitrification denitrogenation.Then the water outlet of anoxic section flows into aerobic zone, and under aerobic condition, Ammonifying bacteria is converted into organonitrogen
under the effect of nitrite bacteria
be oxidized to
then under the effect of nitrobacteria
be further oxidized to
be back to anoxic section by aerobic section nitrification liquid, under anoxia condition, denitrifying bacterium is incited somebody to action by denitrification
or
be reduced into N2, thereby reach the object of denitrogenation.Because flow process is simple, structures are few, only need a sludge reflux system and mixed-liquor return system, saved capital cost.Denitrification does not need to add outer carbon source, has reduced working cost.Aerobic Pond, after anoxic pond, can further be removed organism; Anoxic pond, before Aerobic Pond, can alleviate Aerobic Pond organic loading, reduces aeration rate.But refluxed because A/O technique has both needed nitrification liquid, needed again sludge reflux and aeration aerating, therefore working cost is higher.Because this technique nitric efficiency is not high, be generally 70%～80% again, if settling tank operation is improper, denitrification can occurs in settling tank and cause mud floating, make water outlet water quality deterioration.
Segmental influent Continuous Flow A/O denitrification process, arranges 2～4 anoxic/aerobic sections conventionally, and each pond all adopts completely hybrid.Nitrification liquid is directly to enter next section of oxygen-starved area from the aerobic zone of each section, and this oxygen-starved area utilizes the organism in this section of water inlet to carry out denitrification as carbon source, does not need to arrange internal reflux system and additional carbon.In subsection water inflow A/O technique, organism is uniformly distributed along pond length, meets equilibrium, and therefore, in the situation that variation water quality is larger, effluent quality still has good stability, and capacity of resisting impact load is strong; Without mixed solution internal reflux is set, simplify technique, reduce working cost; Nitric efficiency is high, and segments is more in theory, and return sludge ratio is larger, and nitric efficiency is just higher.Therefore, adopt segmentation multipoint water feeding mode can solve carbon resource shortage problem in the former water of Sewage Plant, can make full use of again the carbon source in sewage, to improve denitrification effect, reduce working cost as denitrifying carbon source.
If adopt conventional segmented water inlet art breading sewage, while carrying out anoxic denitrification denitrogenation due to sludge suspension growth, exist biomass deficiency, aerobic section dissolved oxygen can bring anoxic section into and cause the low problem of anoxic section denitrification efficiency, and the C/N of part of contaminated water factory water inlet is at present on the low side and the feature of the most of macromolecular substance for difficult degradation of carbon source, and in sewage, the removal effect of hardly degraded organic substance can be poor.Therefore intend adopting in multipoint water feeding reactor, dosing filler and carrying out bio-film colonization, utilize microbial film to be further hydrolyzed the organism of difficult degradation in sewage, be that Institute of Micro-biology utilizes, thereby further improve denitrification effect.Meanwhile, adopt alternately water inlet and change aerobic section and the mode of anoxic section distribution, improve stability and the sustainability of reactor operation, prevent reactor plugs and can realize mud decrement.
Summary of the invention
When the utility model carries out anoxic denitrification denitrogenation for traditional waste disposal plant due to sludge suspension growth, exist biomass deficiency, aerobic section dissolved oxygen can bring anoxic section into and cause the low problem of anoxic section denitrification efficiency, the difficult degradation carbon source having proposed in a kind of fully degradation of sewage can be also Institute of Micro-biology's picked-up, can improve the multipoint water feeding alternate run MULTILAYER COMPOSITE filler denitrogenation waste disposal plant of nitric efficiency.
Multipoint water feeding alternate run MULTILAYER COMPOSITE filler denitrogenation waste disposal plant described in the utility model, it is characterized in that: comprise the sewage water inlet pipe, air pump and the controller that are connected with the reactor body of packing layer, with intake pump, described reactor body inside is separated into multiple reaction chambers through spaced the first vertical clapboard and the second vertical clapboard, gap is left in the bottom of the first described vertical clapboard and described reactor body bottom, and gap is left on the upper end of the second described vertical clapboard and described described reactor body top; Described reaction chamber is divided into aerobic zone and oxygen-starved area, and described aerobic zone and described oxygen-starved area are spaced; The bottom of the aerobic zone described in each and described oxygen-starved area is all furnished with aerator; The two ends of described reactor body are provided with water outlet, and each reaction chamber upper end is equipped with and sewage inlet, and described sewage water inlet pipe is communicated with reaction chamber respectively by a point pipeline, form multipoint water feeding structure; Described air pump is communicated with the inlet mouth of all aerator respectively; Described controller is connected with intake pump, aerator.
The interior separation of described reactor body becomes 8 reaction chambers.
Described aerobic zone and the ratio of oxygen-starved area are 3～1:1.
Described sewage water inlet pipe is provided with 4 points of pipelines, and one of them point of pipeline is communicated with the sewage inlet of the reaction chamber as first aerobic zone, and remaining 3 points of pipeline is all communicated with the sewage inlet of the middle reaction chamber as oxygen-starved area.
On each point of pipeline, is all furnished with control valve.
The packing layer of the inside of described reactor body is followed successively by polyhedron empty ball layer, large particle diameter haydite layer from top to bottom, wherein large particle diameter haydite particle diameter between 1-5cm, large particle diameter and small particle size mix haydite layer, wherein small particle size haydite particle diameter is between 0.3-1cm.
The water inlet direction of described controller cycle control sewage water inlet pipe and reaction chamber are as the conversion between aerobic zone and oxygen-starved area.
Working process: first the sewage of first point of pipeline 21 enter first and fill Packed aerobic zone 111, and the organonitrogen in sewage is converted into ammonia nitrogen by the Ammonifying bacteria of aerobic zone 111, is further converted under the effect of nitrococcus and nitrobacteria
the water outlet of first aerobic zone enters first oxygen-starved area, and this oxygen-starved area microbial film can, by the larger molecular organics hydrolysis of last aerobic zone difficult degradation, be converted into degradable small organic molecule, by this anoxic section denitrification is utilized.Meanwhile, second point of pipeline sewage enters this anoxic section, and the nitrate nitrogen that utilizes carbon source that this point of water entry provide and last aerobic section to provide carries out denitrification; The water outlet of first anoxic section enters second aerobic zone, by ammonification and nitrification, is nitrate nitrogen by organonitrogen and mineralized nitrogen.The water inlet of this aerobic section enters second oxygen-starved area, the sewage of three point of pipeline enters this section simultaneously, carry out denitrification, then, the sewage of second oxygen-starved area enters the 3rd aerobic zone, under aerobic condition, by ammonification and nitrification, ammonia nitrogen and organonitrogen are converted into nitrate nitrogen, this district's water outlet enters the 3rd oxygen-starved area, the sewage of four point of pipeline enters this oxygen-starved area simultaneously, carbon source in denitrifying bacterium utilization water inlet and the nitrate of last aerobic zone are realized denitrification, the water outlet of the 3rd oxygen-starved area enters the 4th aerobic zone, remaining organonitrogen and ammonia nitrogen are converted into nitrate nitrogen under aerobic condition, the water outlet of the 4th aerobic zone enters the 4th oxygen-starved area, and the larger molecular organics that microbial film can hydrolyzable moiety difficult degradation, as the denitrifying carbon source in this oxygen-starved area, further removes remaining nitrate nitrogen, meanwhile, increase biologic packing material can play the effect of filtration, improves effluent quality, when after operation certain hour, change water inlet direction, oxygen-starved area is changed aerobic zone into simultaneously, and aerobic zone is changed oxygen-starved area into, and operation in this way, can alleviate the problem that reactor stops up because loading filler, increases the permanent stability of reactor operation.
The beneficial effects of the utility model are: compared with conventional segmented water inlet technique, this technique by loading MULTILAYER COMPOSITE filler and regularly replacing water inlet and change aerobic section and the operation scheme of anoxic section distribution in reactor, can not only effectively increase the biomass in reactor, increase the effect of nitrification and denitrification, can maintain the permanent stability of reactor operation simultaneously, realize the decrement discharge of mud, increase and decrease aerobic section and anoxic section according to the standard of influent quality and required qualified discharge, thereby realize the qualified discharge of sewage, for Sewage Plant propose mark transformation and country sewage dispersion treatment provides new thinking.
Accompanying drawing explanation
Fig. 1 is structure iron of the present utility model (reaction chamber of high order end is as first aerobic zone, and arrow represents sewage direction of motion).
Fig. 2 is structure iron of the present utility model (reaction chamber of low order end is as first aerobic zone, and arrow represents sewage direction of motion).
Embodiment
Further illustrate the utility model below in conjunction with accompanying drawing
With reference to accompanying drawing:
Embodiment 1 multipoint water feeding alternate run described in the utility model MULTILAYER COMPOSITE filler denitrogenation waste disposal plant, comprise with the reactor body 1 of packing layer, the sewage water inlet pipe 2, air pump and the controller that are connected with intake pump, described reactor body 1 inside is separated into multiple reaction chambers 11 through spaced the first vertical clapboard 12 and the second vertical clapboard 13, gap is left in the bottom of the first described vertical clapboard 12 and described reactor body 1 bottom, and gap is left on the upper end of the second described vertical clapboard 13 and described described reactor body 1 top; Described reaction chamber 11 is divided into aerobic zone 111 and oxygen-starved area 112, and described aerobic zone 111 is spaced with described oxygen-starved area 112; The bottom of the aerobic zone 111 described in each and described oxygen-starved area 112 is all furnished with aerator 14; The two ends of described reactor body 1 are provided with water outlet 15, and each reaction chamber 11 upper ends are equipped with and sewage inlet, and described sewage water inlet pipe 2 is communicated with reaction chamber respectively by a point pipeline 21, forms multipoint water feeding structure; Described air pump is communicated with the inlet mouth of all aerator 14 respectively; Described controller is connected with intake pump, aerator.
The interior separation of described reactor body 1 becomes 8 reaction chambers 11.
Described aerobic zone 111 is 3～1:1 with the ratio of oxygen-starved area 112.
Described sewage water inlet pipe 2 is provided with 4 points of pipelines 21, one of them point of pipeline is communicated with the sewage inlet of the reaction chamber 11 as first aerobic zone 111, and remaining 3 points of pipeline is all communicated with the sewage inlet of the middle reaction chamber 11 as oxygen-starved area 112.
On each point of pipeline 21, is all furnished with control valve 211.
The packing layer 16 of the inside of described reactor body 1 is followed successively by polyhedron empty ball layer 161, particle diameter from top to bottom at the large particle diameter haydite layer 162 of 1-3cm, large particle diameter and the small particle size haydite mixing haydite layer 163 of particle diameter at 0.3-1.0cm.
The water inlet direction of described controller cycle control sewage water inlet pipe and reaction chamber are as the conversion between aerobic zone and oxygen-starved area.
Working process: first the sewage of first point of pipeline enter first and fill Packed aerobic zone, the organonitrogen in sewage is converted into ammonia nitrogen by the Ammonifying bacteria of aerobic zone, under the effect of nitrococcus and nitrobacteria, is further converted to
the water outlet of first aerobic zone enters first oxygen-starved area, and this oxygen-starved area microbial film can, by the larger molecular organics hydrolysis of last aerobic zone difficult degradation, be converted into degradable small organic molecule, by this anoxic section denitrification is utilized.Meanwhile, second point of pipeline sewage enters this anoxic section, and the nitrate nitrogen that utilizes carbon source that this point of water entry provide and last aerobic section to provide carries out denitrification; The water outlet of first anoxic section enters second aerobic zone, by ammonification and nitrification, is nitrate nitrogen by organonitrogen and mineralized nitrogen.The water inlet of this aerobic section enters second oxygen-starved area, the sewage of three point of pipeline enters this section simultaneously, carry out denitrification, then, the sewage of second oxygen-starved area enters the 3rd aerobic zone, under aerobic condition, by ammonification and nitrification, ammonia nitrogen and organonitrogen are converted into nitrate nitrogen, this district's water outlet enters the 3rd oxygen-starved area, the sewage of four point of pipeline enters this oxygen-starved area simultaneously, carbon source in denitrifying bacterium utilization water inlet and the nitrate of last aerobic zone are realized denitrification, the water outlet of the 3rd oxygen-starved area enters the 4th aerobic zone, remaining organonitrogen and ammonia nitrogen are converted into nitrate nitrogen under aerobic condition, the water outlet of the 4th aerobic zone enters the 4th oxygen-starved area, and the larger molecular organics that microbial film can hydrolyzable moiety difficult degradation, as the denitrifying carbon source in this oxygen-starved area, further removes remaining nitrate nitrogen, meanwhile, increase biologic packing material can play the effect of filtration, improves effluent quality, when after operation certain hour, change water inlet direction, oxygen-starved area is changed aerobic zone into simultaneously, and aerobic zone is changed oxygen-starved area into, and operation in this way, can alleviate the problem that reactor stops up because loading filler, increases the permanent stability of reactor operation.
Content described in this specification sheets embodiment is only enumerating of way of realization to utility model design; protection domain of the present utility model should not be regarded as only limiting to the specific form that embodiment states, protection domain of the present utility model also comprises that those skilled in the art conceive the equivalent technologies means that can expect according to the utility model.
Claims (6)
1. multipoint water feeding alternate run MULTILAYER COMPOSITE filler denitrogenation waste disposal plant, it is characterized in that: comprise the sewage water inlet pipe, air pump and the controller that are connected with the reactor body of packing layer, with intake pump, described reactor body inside is separated into multiple reaction chambers through spaced the first vertical clapboard and the second vertical clapboard, gap is left in the bottom of the first described vertical clapboard and described reactor body bottom, and gap is left on the upper end of the second described vertical clapboard and described described reactor body top; Described reaction chamber is divided into aerobic zone and oxygen-starved area, and described aerobic zone and described oxygen-starved area are spaced; The bottom of the aerobic zone described in each and described oxygen-starved area is all furnished with aerator; The two ends of described reactor body are provided with water outlet, and each reaction chamber upper end is equipped with and sewage inlet, and described sewage water inlet pipe is communicated with reaction chamber respectively by a point pipeline, form multipoint water feeding structure; Described air pump is communicated with the inlet mouth of all aerator respectively; Described controller is connected with intake pump, aerator.
2. multipoint water feeding alternate run MULTILAYER COMPOSITE filler denitrogenation waste disposal plant as claimed in claim 1, is characterized in that: the interior separation of described reactor body becomes 8 reaction chambers.
3. multipoint water feeding alternate run MULTILAYER COMPOSITE filler denitrogenation waste disposal plant as claimed in claim 2, is characterized in that: described aerobic zone and the ratio of oxygen-starved area are 3～1:1.
4. multipoint water feeding alternate run MULTILAYER COMPOSITE filler denitrogenation waste disposal plant as claimed in claim 3, it is characterized in that: described sewage water inlet pipe is provided with 4 points of pipelines, one of them point of pipeline is communicated with the sewage inlet of the reaction chamber as first aerobic zone, and remaining 3 points of pipeline is all communicated with the sewage inlet of the middle reaction chamber as oxygen-starved area.
5. multipoint water feeding alternate run MULTILAYER COMPOSITE filler denitrogenation waste disposal plant as claimed in claim 4, is characterized in that: on each point of pipeline, be all furnished with control valve.
6. multipoint water feeding alternate run MULTILAYER COMPOSITE filler denitrogenation waste disposal plant as claimed in claim 5, it is characterized in that: the packing layer of the inside of described reactor body is followed successively by polyhedron empty ball layer, large particle diameter haydite layer from top to bottom, wherein large particle diameter haydite particle diameter between 1-5cm, large particle diameter and small particle size mix haydite layer, wherein small particle size haydite particle diameter is between 0.3-1cm.
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|---|---|---|---|
| CN201320609733.6U CN203593662U (en) | 2013-09-29 | 2013-09-29 | Sewage denitrifying treatment device through alternatively multi-point water inflowing and multi-layer composite filler filling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320609733.6U CN203593662U (en) | 2013-09-29 | 2013-09-29 | Sewage denitrifying treatment device through alternatively multi-point water inflowing and multi-layer composite filler filling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105198083A (en) * | 2015-09-16 | 2015-12-30 | 北京首创清源环境科技有限公司 | Integrated sewage treatment device and method |
| CN108467113A (en) * | 2018-05-22 | 2018-08-31 | 北京华明广远环境科技有限公司 | Efficient denitrification filter pool |
| CN113023890A (en) * | 2021-03-17 | 2021-06-25 | 北京恩菲环保技术有限公司 | Anoxic/aerobic alternate operation reinforced autotrophic nitrogen removal sewage treatment method and device |
| CN114230098A (en) * | 2021-12-17 | 2022-03-25 | 中煤科工集团杭州研究院有限公司 | Short-range synchronous denitrification device and method for domestic sewage |
-
2013
- 2013-09-29 CN CN201320609733.6U patent/CN203593662U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105198083A (en) * | 2015-09-16 | 2015-12-30 | 北京首创清源环境科技有限公司 | Integrated sewage treatment device and method |
| CN108467113A (en) * | 2018-05-22 | 2018-08-31 | 北京华明广远环境科技有限公司 | Efficient denitrification filter pool |
| CN113023890A (en) * | 2021-03-17 | 2021-06-25 | 北京恩菲环保技术有限公司 | Anoxic/aerobic alternate operation reinforced autotrophic nitrogen removal sewage treatment method and device |
| CN114230098A (en) * | 2021-12-17 | 2022-03-25 | 中煤科工集团杭州研究院有限公司 | Short-range synchronous denitrification device and method for domestic sewage |
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